| Vagrant: Generate Ansible inventory without running a playbook? Posted: 22 Jul 2021 10:41 AM PDT I'm using Vagrant to set up a small group of virtual machines. Because of limitations in the way vagrant handles Ansible provisioning, I'd like to run my playbooks by hand after vagrant up is complete...but I still want vagrant to generate an Ansible inventory for the cluster. I tried setting up a config.vm.provision section without specifying an ansible playbook, like this: Vagrant.configure("2") do |config| [...] config.vm.provision :ansible do |ansible| ansible.compatibility_mode = "2.0" ansible.groups = { "ceph_servers" => Array.new(num_ceph) { |machine_id| "ceph#{machine_id+1}" }, "nfs_servers" => Array.new(num_nfs) { |machine_id| "nfs#{machine_id+1}" }, "clients" => Array.new(num_clients) { |machine_id| "client#{machine_id+1}" }, } end end
But that fails with: There are errors in the configuration of this machine. Please fix the following errors and try again: ansible remote provisioner: * `playbook` file path must be set.
Is there any way to instruct the provisioner to generate the inventory without running a playbook? Or is the only solution to create a minimal playbook to keep the provisioner happy?  |
| php exec/shell_exec behavior CLI vs CGI Posted: 22 Jul 2021 10:31 AM PDT I am trying to use php to run some system commands and am getting a behaviour that I don't fully understand. If the php script is run from the command line I get the results I expect. But running it through apache yields mixed results. For example, I have this simple little php script: <?php $res = shell_exec("ps -ef"); echo $res; ?>
If I run it from the command line I get the full list of processes as I would expect to see if I had run "ps -ef" directly. However if I run the script through apache, I get a smaller set of processes, most of which are apache-owned, although there are also a few root-owned processes and one that is owned by my regular user. Trying to use other commands gets similar behavior; it works when I run it in CLI mode (e.g. "php test.php"), but not when I pull up the php script in apache. It also doesn't seem to matter which user is running it in CLI mode (I've tested it with root and with my personal user account). It seems like some sort of permissions issue, although it's seemingly not an executable issue since in the example of "ps -ef" I get results in both cases. I am running on CentOS 8, using apache 2.4.37 and php 8.0.8. What am I missing? Thanks, Gavin  |
| Why do I get umask 022 as default in my main user instead of the 0002 one? Posted: 22 Jul 2021 10:22 AM PDT I'm using Fedora 34 (Workstation Edition) —although I've seen this same behaviour on a Debian Buster machine, and I'm trying to understand why the users that I am creating are getting the umask 0002 by default, whereas my main user gets 0022 instead. If I do id and umask with my main user, I get the following output: mikelalejobr@fedora:~$ id uid=1000(mikelalejobr) gid=1000(mikelalejobr) groups=1000(mikelalejobr),10(wheel) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 mikelalejobr@fedora:~$ umask 0022
Now, I create a new user and I change its password: mikelalejobr@fedora:~$ sudo useradd myNewUserUmask mikelalejobr@fedora:~$ sudo passwd myNewUserUmask
Finally I log in as the new user and issue an umask command: [myNewUserUmask@fedora mikelalejobr]$ cd [myNewUserUmask@fedora ~]$ id uid=1003(myNewUserUmask) gid=1003(myNewUserUmask) groups=1003(myNewUserUmask) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 [myNewUserUmask@fedora ~]$ umask 0002
Checking /etc/bashrc, there's the following condition: if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then umask 002 else umask 022 fi
If I run the following script in my main account, I get: mikelalejobr@fedora:~$ if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then echo "Umask 002"; else echo "Umask 022"; fi Umask 002
The same that in the freshly created account: [myNewUserUmask@fedora ~]$ if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then echo "Umask 002"; else echo "Umask 022"; fi Umask 002
I haven't changed any files like /etc/bashrc nor /etc/profile, and I've tried logging in as the newTestUserUmask using the GDM to check if that could be "the issue", but with no luck. So, what am I missing here? Thank you in advance  |
| Install libgnome-games-support > 1.7.1 to compile gnome-mines Posted: 22 Jul 2021 10:01 AM PDT I'm trying to compile gnome mines. for that I am doing meson compile. This is the error I am getting The Meson build system Version: 0.53.2 Source dir: gnome-mines Build dir: gnome-mines/compile Build type: native build Project name: gnome-mines Project version: 40.0 C compiler for the host machine: ccache cc (gcc 9.3.0 "cc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0") C linker for the host machine: cc ld.bfd 2.34 Vala compiler for the host machine: valac (valac 0.48.6) Host machine cpu family: x86_64 Host machine cpu: x86_64 Found pkg-config: /usr/bin/pkg-config (0.29.1) Run-time dependency glib-2.0 found: YES 2.64.6 Run-time dependency gee-0.8 found: YES 0.20.3 Run-time dependency gtk+-3.0 found: YES 3.24.20 Run-time dependency librsvg-2.0 found: YES 2.48.9 Dependency libgnome-games-support-1 found: NO found 1.6.1 but need: '>= 1.7.1' Found CMake: /usr/bin/cmake (3.16.3) Run-time dependency libgnome-games-support-1 found: NO (tried cmake) meson.build:27:0: ERROR: Invalid version of dependency, need 'libgnome-games-support-1' ['>= 1.7.1'] found '1.6.1'. A full log can be found at /home/carlos/gitrepos/github/gnome/gnome-mines/compile/meson-logs/meson-log.txt
I tried doing without success apt install libgnome-games-support-1-dev apt-cache madison libgnome-games-support-1-dev libgnome-games-support-1-dev | 1.6.1-1 | ...
How can I install libgnome-games-support > 1.7.1 ?  |
| How to connect a Picocluster running Ubuntu 18.04 to the internet? Posted: 22 Jul 2021 09:55 AM PDT I have a Picocluster 5H (5 Jetson Nano) The nodes are connected up and pre-configured with 10.1.10.[240,241,242,243,244] addresses, they can talk to each other But the cluster is not connected to the internet (I want to do git pull, docker pull etc) I connected a USB wireless dongle to one of the node. With that, the jetson nano (10.1.10.241) has been added/issued the IP 192.168.0.25 I am able to ssh/sftp from the Jetson with the USB wireless dongle to my main development box 192.168.0.24 However, I cannot ping/connect to the internet (even with IP address of the external host) I believe I need to setup at least the following - DNS
- Route table so that any non 10.* should be routed through some gateway IP
I have tried reading some of the suggestion on Stack Exchange but not being a network engineering, I get lost in the technical description. The following is the ifconfig and route -n dump from the Jetson Nano computer. It is running Ubuntu 18.04 I hope the following information clarify my question eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.1.10.241 netmask 255.255.255.0 broadcast 10.1.10.255 inet6 fe80::4ab0:2dff:fe3d:1cff prefixlen 64 scopeid 0x20<link> ether 48:b0:2d:3d:1c:ff txqueuelen 1000 (Ethernet) RX packets 1862 bytes 117711 (117.7 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 568 bytes 29787 (29.7 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 151 base 0x5000 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1 (Local Loopback) RX packets 1591 bytes 139099 (139.0 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1591 bytes 139099 (139.0 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 rndis0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether f2:20:d0:21:db:4d txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 usb0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether f2:20:d0:21:db:4f txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.25 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::af66:4610:a74b:5387 prefixlen 64 scopeid 0x20<link> ether 50:2b:73:e9:8d:e2 txqueuelen 1000 (Ethernet) RX packets 2802 bytes 193082 (193.0 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 122 bytes 13496 (13.4 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.1.10.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 192.168.0.1 0.0.0.0 UG 20600 0 0 wlan0 10.1.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0 192.168.0.0 0.0.0.0 255.255.255.0 U 600 0 0 wlan0
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| Disabling core-dumps, when filesystem is almost full Posted: 22 Jul 2021 09:47 AM PDT We make good use of the core-dumps and don't want to disable them completely. At the same time, we don't want them to fill up the filesystem. Can Linux be told to disable them automatically, when the filesystem, to which they would've been dumped, is above the specified threshold -- like 90%?  |
| How to fix vim color scheme in other terminals? Posted: 22 Jul 2021 09:43 AM PDT The problem I'm dealing with right now is I don't like gnome-terminal. I've tried alacritty, konsole, st (currently in use), and they're all having the same issue – they break my vim color scheme. Here's what I mean by that:  In this screenshot, gnome-terminal is on the left, and st is on the right. I'm using the same color profile in both terminal emulators, and I don't have .vimrc since I rarely use vim locally. Somehow gnome-terminal manages to maintain the right colors, although in both terminals vim color scheme in use is the default one. I've tried searching for ways to solve this, the only thing that I found is to specify the $TERM variable to be xterm-256color, but it didn't help. Another thing that I've noticed is when I force gnome-terminal's vim to use the default color scheme with :colorscheme default, colors are the same as in st's vim. Recently figured out that the closest to gnome-terminal's default color scheme is ron. I'm actually lost and have no idea what to do with this. There's no point in editing .vimrc because I ssh a lot and it won't have any effect. It doesn't sound like a big problem, but these colors are quite distracting. Any help will be appreciated, thanks to everyone who has read this. Some command outputs: -- gnome-terminal: :colorscheme default echo $TERM xterm-256color
-- st: :colorscheme default echo $TERM xterm-256color
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| terminal is not terminating after executing the command Posted: 22 Jul 2021 09:58 AM PDT I'm trying to run the following command in a shell script #!/bin/bash yes | sudo $ANDROID_SDK_ROOT/cmdline-tools/tools/bin/sdkmanager --sdk_root=$ANDROID_SDK_ROOT --licenses
but the terminal is stuck in the following part below, however, it seems accept the license but the terminal didn't terminal so I can proceed with the other commands, any idea how I can overcome this issue knowing that, I can not intervene manually since this command is running in yml file in GitHub actions 10.8 Open Source Software. In the event Open Source software is included with Evaluation Software, such Open Source software is licensed pursuant to the applicable Open Source software license agreement identified in the Open Source software comments in the applicable source code file(s) and/or file header as indicated in the Evaluation Software. Additional detail may be available (where applicable) in the accompanying on-line documentation. With respect to the Open Source software, nothing in this Agreement limits any rights under, or grants rights that supersede, the terms of any applicable Open Source software license agreement. --------------------------------------- Accept? (y/N): All SDK package licenses accepted
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| No space left on device, space and inodes available on NTFS drive Posted: 22 Jul 2021 09:40 AM PDT When I try to make new directories (with mkdir) or files (even empty ones with touch) on an external NTFS hard drive that I use for personal backups, filesystem operations fail with No space left on device. Here is what df has to say about space and inode usage of the drive: $ df -it fuseblk Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda1 156579976 3240128 153339848 3% /mnt/hd $ df -ht fuseblk Filesystem Size Used Avail Use% Mounted on /dev/sda1 932G 786G 147G 85% /mnt/hd
There appears to be still lots of space left. Since even making directories was a problem, at first I thought this was an inodes issue, but only 3% of the quota has been filled. What else could be causing this problem?  |
| installing manjaro on usb with rufus Posted: 22 Jul 2021 09:31 AM PDT i just tried to dual boot manjaro with windows 10. I downloaded 'manjaro-kde-21.0.7-210614-linux510' from manjaro website and tried to install it on USB via rufus with these settings: Partition scheme --> MBR Target system --> BIOS or UEFI File System --> FAT32 cluster size --> 4096 bytes
but I get: Error: write error.
I tried installing ubuntu 21.04 LTS with the same settings, it worked fine. It is worth mentioning that I tried installing another edition of manjaro(xfce), and again I got write error. I would appreciate any help on this. thanks a lot.  |
| Python - how to make decision based on a failed command (netmiko and try-except-else) Posted: 22 Jul 2021 09:27 AM PDT I am trying to create a test program which will log to Cisco ASA firewalls and collect some data. I run into a challenge. Some firewalls are single context some are multi-context, but connection is made on admin IP address to all of them. Once connected there is a command "changeto system" which will only be successful on multi-context firewalls. I was thinking to use try-except-else .... conn = ConnectHandler(device_type= "cisco_asa", ip=host[1], username=u[host[3]], password=p[host[3]], secret=p[host[3]]) print(conn.find_prompt()) try: output4 = conn.send_command(cmd_system) except: # not a multi-context firewall for cmd in cmd_list_asa: CONTEXT_OUTPUT = open(chgnr + '__' + host[0] + '_' + d[cmd]+ '_' + testtype , "a") info = ("running .... " + host[0] + "......." + cmd) runcommand(info, cmd, CONTEXT_OUTPUT) CONTEXT_OUTPUT.close() else: #multi-context firewall #collect SYSTEM context data for cmd in cmd_list_asa: CONTEXT_OUTPUT = open(chgnr + '__' + host[0] + '_system_' + d[cmd]+ '_' + testtype , "a") info = ("running .... " + host[0] + "_system......." + cmd) runcommand(info, cmd, CONTEXT_OUTPUT) CONTEXT_OUTPUT.close() #create context list and collect data output3 = conn.send_command(cmd_contextlist) list = re.findall("\"(.*?)\"",output3) for fw in list: cmd_change = ("changeto context " + fw) output = conn.send_command(cmd_change) for cmd in cmd_list_asa: CONTEXT_OUTPUT = open(chgnr + '__' + host[0] + '_' + fw + '__' + d[cmd]+ '_' + testtype , "a") info = ("running .... " + host[0] + "_" + fw + "......." + cmd) runcommand(info, cmd, CONTEXT_OUTPUT) CONTEXT_OUTPUT.close()
the CONTEXT_OUTPUT is just a fancy way of dynamically generating filename. testype to differentiate between multiple runs and finally all what runcommand does it sends the command...conn.send_command(cmd). As per my expectation if output4 command fails the except section should be executed if is successful should jump to the else section, but apparently even those firewalls which are not multicontext will run through the else section and skip except.  |
| options with optional values using getopt Posted: 22 Jul 2021 09:20 AM PDT I have the following function and would like to look into how options with optional values can be set up using getopt. Would like to have -w taking on default values region -w -- "Text"
And -w 1 that takes the optional numeric value. region -w 1 -- "Text"
The function is here region () { # Process command line options shortopts="hw::" longopts="help,version,warning:" opts=$(getopt -o "$shortopts" -l "$longopts" \ -n "$(basename $0)" -- "$@") if [ $? -eq 0 ]; then eval "set -- ${opts}" while [ $# -gt 0 ]; do case "$1" in -h|-\?|--help) printf "%s\n" "Todo." shift break ;; -w|--warning) case "$2" in "1") local -r warn="first"; shift 2 ;; *) local -r warn="all"; shift 2 ;; esac local -r f=1 ;; --) local -r f=1 shift break ;; esac done else shorthelp=1 # getopt returned (and reported) an error. fi }
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| How do I fix ndb-client error: can't read superblock on /dev/nbd2? (When mounting /dev/nbdX) Posted: 22 Jul 2021 09:19 AM PDT I'm trying setup a client that connect to a 500Gb ext4 disk on another machine running nbd server. Server: raspberry pi 3: uname -r 4.19.66+ Client: raspberry pi 3: uname -r 5.10.17-v7+
I've followed the information here [https://github.com/NetworkBlockDevice/nbd] and a lot of other sites - when I enter: > sudo mount /dev/nbd2 /home/pi/Vols/nbd1-recipes/ mount: /home/pi/Vols/nbd1-recipes: can't read superblock on /dev/nbd2
I notice ndb-server appears to be serving on default port - NOT ones specified in config file. (see last command port list) This is how I've set up the server & client, it's probably something obvious to more experienced folk. == rpi-C3 (192.168.1.14) server setup > sudo apt-get update > sudo apt-get install nbd-server > sudo nano /etc/nbd-server/config [generic] # If you want to run everything as root rather than the nbd user, you # may either say "root" in the two following lines, or remove them # altogether. Do not remove the [generic] section, however. user = nbd group = nbd includedir = /etc/nbd-server/conf.d allowlist = true # What follows are export definitions. You may create as much of them as # you want, but the section header has to be unique. [images] exportname = /home/pi/media/500G_FAITH/images port = 510029 [recipes] exportname = /home/pi/media/500G_FAITH/recipes port = 510030 [movie] exportname = /home/pi/media/500G_FAITH/movies port = 510031 > sudo modprobe nbd # NOT nbd-server! > lsmod | grep nbd nbd 40960 0 > sudo service nbd-server force-reload # if already running
== client side > sudo apt-get install nbd-client > sudo modprobe nbd > nbd-client 192.168.1.14 -l Negotiation: .. images recipes movie > sudo nbd-client 192.168.1.14 -N recipes /dev/nbd2 Negotiation: ..size = 0MB Connected /dev/nbd2 > sudo nbd-client 192.168.1.14 -N movie /dev/nbd3 Negotiation: ..size = 0MB Connected /dev/nbd3 > sudo nbd-client 192.168.1.14 -N images /dev/nbd1 Negotiation: ..size = 0MB Connected /dev/nbd1 > dmesg | tail -n 10 [ 1417.883364] Buffer I/O error on dev nbd1, logical block 0, async page read [ 1417.884614] block nbd1: Other side returned error (22) [ 1417.884652] blk_update_request: I/O error, dev nbd1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 1417.884673] Buffer I/O error on dev nbd1, logical block 0, async page read [ 1417.885977] block nbd1: Other side returned error (22) [ 1417.886016] blk_update_request: I/O error, dev nbd1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 1417.886036] Buffer I/O error on dev nbd1, logical block 0, async page read [ 1417.887276] block nbd1: Other side returned error (22) [ 1417.888492] block nbd1: Other side returned error (22) [ 1417.889751] block nbd1: Other side returned error (22) > sudo nbd-client 192.168.1.14 -d /dev/nbd1 # thought it might be to do w/ nbd1 > sudo nbd-client 192.168.1.14 -N images /dev/nbd4 Negotiation: ..size = 0MB Connected /dev/nbd4 > dmesg | tail -n 10 [ 1848.831897] block nbd4: Other side returned error (22) [ 1848.833341] block nbd4: Other side returned error (22) [ 1848.834651] block nbd4: Other side returned error (22) [ 1848.836002] block nbd4: Other side returned error (22) > lsblk -f NAME FSTYPE LABEL UUID FSAVAIL FSUSE% MOUNTPOINT sda ├─sda1 vfat EFI 67E3-17ED └─sda2 hfsplus time_box_2018 xxxxxxxx-363b-3284-88c4-03ce3493aeff 115.5G 94% /media/pi/time_box_2018 nbd2 nbd3 nbd4 mmcblk0 ├─mmcblk0p1 vfat boot 5DE4-665C 203.4M 19% /boot └─mmcblk0p2 ext4 rootfs xxxxxxxx-bbc2-4267-9fa0-099e10ef5bf0 4.1G 37% / > dmesg | tail -n 10 [ 1848.836002] block nbd4: Other side returned error (22) [ 1848.837430] block nbd4: Other side returned error (22) [ 1848.838860] block nbd4: Other side returned error (22) [ 1848.840224] block nbd4: Other side returned error (22) [ 1848.841691] block nbd4: Other side returned error (22) [ 1848.843077] block nbd4: Other side returned error (22) [ 1848.844415] block nbd4: Other side returned error (22) [ 2802.615037] block nbd3: Receive control failed (result -32) [ 2802.625871] block nbd2: Receive control failed (result -32) [ 2802.648444] block nbd4: Receive control failed (result -32) > ls /home/pi/Vols/ nbd1-recipes/ rpi-C2-nbd-500G/ tbx2018/ time_box_2018/ > sudo mount /dev/nbd2 /home/pi/Vols/nbd1-recipes/ mount: /home/pi/Vols/nbd1-recipes: can't read superblock on /dev/nbd2. > sudo parted -l Model: Seagate BUP Slim SL (scsi) Disk /dev/sda: 2000GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 20.5kB 210MB 210MB fat32 EFI System Partition boot, esp 2 210MB 2000GB 2000GB hfs+ time_box_2018 Error: /dev/nbd3: unrecognised disk label Model: Unknown (unknown) Disk /dev/nbd3: 4096B Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: Error: /dev/nbd4: unrecognised disk label Model: Unknown (unknown) Disk /dev/nbd4: 4096B Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: Error: /dev/nbd2: unrecognised disk label Model: Unknown (unknown) Disk /dev/nbd2: 4096B Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: Model: SD SL08G (sd/mmc) Disk /dev/mmcblk0: 7948MB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 4194kB 273MB 268MB primary fat32 lba 2 273MB 7948MB 7676MB primary ext4
I've been trying to get them to talk for 2 days now! One thing I did notice is that the port numbers in the config file don't seem to change the fact it's listening on he default port (10809)?? > sudo lsof -i -P -n | grep LISTEN COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME cnid_meta 312 root 3u IPv6 11170 0t0 TCP [::1]:4700 (LISTEN) afpd 324 root 3u IPv4 11195 0t0 TCP *:548 (LISTEN) sshd 426 root 3u IPv4 12126 0t0 TCP *:22 (LISTEN) sshd 426 root 4u IPv6 12128 0t0 TCP *:22 (LISTEN) dnsmasq 431 dnsmasq 5u IPv4 12046 0t0 TCP *:53 (LISTEN) dnsmasq 431 dnsmasq 7u IPv6 12048 0t0 TCP *:53 (LISTEN) nbd-serve 2026 nbd 3u IPv6 20100 0t0 TCP *:10809 (LISTEN)
I'd be very grateful for any pointers, or other resources that my be of help. Thanks in advance,  |
| External command failed to finish. Command /usr/sbin/bootloader-config failed to finish in 600 seconds. There was no output from the command Posted: 22 Jul 2021 09:16 AM PDT I keep on getting this error when i install parrot os in virtual box  |
| Delete spaces at the end of folder names Posted: 22 Jul 2021 09:39 AM PDT I had a NAS and I connected to it with the "afp" protocol. Now I connect to it with the "smb" protocol. My problem is that I had folders with "spaces" at the end of the name (example = "Music" ) and since I use the SMB protocol, all my folders with spaces at the end of the name are not displayed anymore. On my computer (Mac) I can see all my folders except those. My fear is that in my Music folder, there are potentially other folders with spaces at the end of the name. I don't know if this is feasible but would you have an idea of a script in bash that could help me solve this problem? I tried: python3 -c 'import pathlib for p in iter(pathlib.Path(".").rglob("*[ \t]")): p.rename("/".join([str(p.parent),p.name.rstrip()]))'
And LC_ALL=C find . -depth -name '*[[:space:]]' -exec sh -x -c ' for f do : mv -i "$f" "${f%"${f##*[![:space:]]}"}" done' sh {} +
No Changes.  |
| How can i install linux os on my new windows laptop Posted: 22 Jul 2021 09:10 AM PDT I am so eager to start using linux on my new windows laptop. But I know no where to start.  |
| Can picom be as fast as mutter? Posted: 22 Jul 2021 08:19 AM PDT I recently migrated from Windows to Linux Mint. I was very happy with the performance and then I decided to install bspwm. I installed picom as the compositor, but it was significantly lagger while scrolling than when I was inside Cinnamon. (In zathura reader as well as the terminal, I noticed significant lag). I searched about the compositor that gnome uses and found it was mutter. Without giving much thought, I replaced picom with mutter in the startup file. The performance was back, but no transparency or anything. I want to use picom as it has a nice configuration file, but no matter what changes I do to the config file, performance is still slower. It's not like bspwm is unusable, I was just thinking if it could be made more smoother. Any help would be appreciated. I'm sorry if this is a noob question.  |
| Locking Gnome3 from pydbus doesn't return Posted: 22 Jul 2021 08:04 AM PDT Trying to lock the screen from python3 script, it works, but the script doesn't exit. What should I change? pydbus.SessionBus().get("org.gnome.ScreenSaver","/org/gnome/ScreenSaver").Lock()
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| Cifs share on Windows host disconnects, but can still be reached using smblient Posted: 22 Jul 2021 08:18 AM PDT My small home network includes a Wandboard running Arch Linux ARM which acts as a mini-NAS and a Windows 7 desktop. The Linux box mounts a cifs share hosted on the Windows 7 machine at boot. But after a certain amount of time the connection to the share is lost. I can cd to the mount point directory, but when I run ls I get the message: cannot open directory '.': Host is down. If I unmount the mount directory and try to remount the share, I get a mount error(2): No such file or directory error. (The mount line in fstab is: //192.xxx.x.xx/Work /mnt/Work cifs guest,users,credentials=/home/alarm/.smbcredentials,iocharset=utf8,vers=2.1 0 0) However, I can connect to the share using smbclient. And if I reboot the Wandboard the share again mounts with no problem. But after a time it becomes inaccessible again. I've tried several different things on the Windows machine, including enabling and disabling SMB v1 and trying all the possible settings for the NIC (Intel with the latest driver) and for Windows share permissions. But the problem must involve Linux, since the share remains available via smbclient and mounts with no problem when I reboot. I've updated samba and cifs-utils and tried enabling and disabling winbind. I'm not sure what else to try. I've looked in the samba logs with log level 4 enabled, but I can't find anything obvious. I've tried to track accesses to the share in Windows by enabling auditing on it, but I don't see anything obvious there. (Full disclosure: I'm not an IT pro but a user who has spent a certain amount of time learning Linux) Any help would be appreciated. I can provide any information anyone might need. TIA Les - Arch Linux ARM version 5.7.2-1-ARCH - samba v 4.12.3 - cifs-utils v 2.26 - mount.cifs v 6.10
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| How to remove unknown characters from a folder name? Posted: 22 Jul 2021 08:24 AM PDT I have a Debian 10 machine which is used as a Share server (Samba Server). I go on my Mac, I create a folder Document.1 in the shared folder. When I go to my Linux Debian machine, I find myself with an unknown character (square with question marks) in place of the .. I want to use a script to remove these characters. I could do it by hand but I have a very large tree. I don't know if I was clear enough, don't hesitate if you need more information. Update : I also do it with spaces at the end of folder names (for example = Document1 ) I thank you in advance if you have a little idea of BASH script. Have a nice day. root@debian:/home/ekip/Documents# ls -lb total 20 drwxr-xr-x 3 ekip ekip 4096 juil. 21 09:33 deuxpoints drwxr-xr-x 10 ekip ekip 4096 juil. 21 16:12 espace drwxr-xr-x 2 ekip ekip 4096 juil. 22 16:47 script drwxrwxrwx 2 ekip ekip 4096 juil. 22 15:14 TEST -rw-r--r-- 1 root root 20 juil. 22 17:00 unicode.sh root@debian:/home/ekip/Documents#
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| Multithreading Prgram in C++ Posted: 22 Jul 2021 08:45 AM PDT I am running the following multi-threaded C++ program: #include <bits/stdc++.h> #include <algorithm> #include <ctime> #include <ratio> #include <chrono> #include <thread> using namespace std; using ll = long long int; ll oddsum,evensum; void countodd(ll start, ll last){ cout<<"odd thread "<<this_thread::get_id()<<endl; oddsum=0; if(start&1) { } else{ start++; } for(ll i=start;i <=last;i+=2) { oddsum+=i; } } void counteven(ll start, ll last){ cout<<"even thread "<<this_thread::get_id()<<endl; evensum=0; if(start&1) { start++; } else{ } for(ll i=start;i <=last;i+=2) { evensum+=i; } } int main() { ll start = 1; ll last = 10000000000LL; cout<<"main thread "<<this_thread::get_id()<<endl; auto startTime = chrono::high_resolution_clock::now(); thread t1(countodd, start, last); thread t2(counteven, start, last); t1.join(); t2.join(); // countodd(start, last); // counteven(start, last); auto endTime = chrono::high_resolution_clock::now(); auto time_span = chrono::duration_cast<chrono::duration<double>>(endTime-startTime); cout<<time_span.count()<<endl; cout<<oddsum<<" "<<evensum<<endl; return 0; }
When I run this program in multi-threaded mode, the top command shows a.out to be using 200% CPU. When it is run in normal mode, it shows 100% CPU usage. But the run time of both the programs are the same. Should the top command show two process for each thread? UPDATE: So i compiled the program using -O2 flag(G++) and now i can see significant diffrence between my serial program and multithreaded program. whats the reason for this?  |
| combining the two awk file Posted: 22 Jul 2021 08:12 AM PDT I am trying to detact the selfish node based on the ncr and energy equation.. I have already detacted the selfish node, but based on ncr and energy separately.. and I had a problem combining the two conditions (if the node's ncr is less than 30 and its energy is less than the threshold, it is classified as a node selfish) This is the awk code for detecting the selfish node based on energy.. BEGIN { n=38 SelfishCounter=0; Normalcounter=0; } { # Trace line format: energy event = $1 time = $2 if (event == "r" || event == "d" || event == "s"|| event == "f") { node_id = $3 energy=$14 } if (event=="N"){ node_id = $5 energy=$7 } # Store remaining energy finalenergy[node_id]=energy } END { # finalenergy for each node for (i in finalenergy) { finalenergy[i] totalenergy = 0 for (i = 0; i <= n; i = i + 1) totalenergy += finalenergy[i] } ###compute average energy threshold=totalenergy/n ####output for (i=0; i<n; i++) { if(threshold >finalenergy[i]){ SelfishCounter++; } else if(threshold <finalenergy[i]){ Normalcounter++; } } printf "number of selfish nodes:%d \n", SelfishCounter; printf "number of normal nodes:%d \n", Normalcounter; }
This is the awk code for detecting the selfish node based on NCR..I used the sh file with it BEGIN { ReqCounter=0; RepCounter=0; NCRCounter=0; Normalcounter=0; max_node = 0; } {action=$1; if(action == "s" || action == "r" || action == "f") { if(($33 == "REQUEST") && ($5==node)) ReqCounter++; if(($33 == "REPLY") && ($5==node)) RepCounter++; } } END { NCR= ((ReqCounter-(ReqCounter-RepCounter))/ReqCounter)*100; if(NCR <= "30"){ NCRCounter++; printf "SELFISH\n"; } else{ Normalcounter++; printf "NORMAL\n";} # printf "The Node number is:%d \n", node; # printf "The NCRis:%d \n", NCR; #printf "REQUEST Count:%d \n", ReqCounter; #printf "REPLY Count:%d \n", RepCounter; }
#!/bin/sh i=0 SelfishNodes=0 NormalNodes=0 while [ $i -lt 38 ] do value=$(awk -v node=$i -f NCR.awk DSR.tr) echo "Node" $i "is" $value i=`expr $i + 1` if [ "$value" = "SELFISH" ] then SelfishNodes=` expr $SelfishNodes + 1` else NormalNodes=`expr $NormalNodes + 1` fi done echo "Total Number of Sefiish Nodes are:" $SelfishNodes echo "Totl Number of Normal Nodes are:"$NormalNodes
When I mix the two awk files shown above together BEGIN { n=38 SelfishCounter=0; Normalcounter=0; ReqCounter=0; RepCounter=0; } { # Trace line format: energy event = $1 time = $2 if (event == "r" || event == "d" || event == "s"|| event == "f") { node_id = $3 energy=$14 if(($33 == "REQUEST") && ($5 == node)) ReqCounter++; if(($33 == "REPLY") && ($5 == node)) RepCounter++; } if (event=="N"){ node_id = $5 energy=$7 } # Store remaining energy finalenergy[node_id]=energy } END { NCR= ((ReqCounter-(ReqCounter-RepCounter))/ReqCounter)*100; # finalenergy for each node for (i in finalenergy) { finalenergy[i] totalenergy = 0 for (i = 0; i <= n; i = i + 1) totalenergy += finalenergy[i] } ###compute average energy threshold=totalenergy/n ####output if((threshold >finalenergy[i]) || (NCR <= 30)){ SelfishCounter++; printf "SELFISH\n"; } else{ Normalcounter++; printf "NORMAL\n";} } } }
#!/bin/sh i=0 SelfishNodes=0 NormalNodes=0 while [ $i -lt 38 ] do value=$(awk -v node=$i -f energy-ncr.awk DSR.tr) echo "Node" $i "is" $value i=`expr $i + 1` if [ "$value" = "SELFISH" ] then SelfishNodes=` expr $SelfishNodes + 1` else NormalNodes=`expr $NormalNodes + 1` fi done echo "Total Number of Sefiish Nodes are:" $SelfishNodes echo "Totl Number of Normal Nodes are:"$NormalNodes
the following error appears Node 33 is awk: energy-ncr.awk:59: } awk: energy-ncr.awk:59: ^ syntax error awk: energy-ncr.awk:62: } awk: energy-ncr.awk:62: ^ syntax error Node 34 is awk: energy-ncr.awk:59: } awk: energy-ncr.awk:59: ^ syntax error awk: energy-ncr.awk:62: } awk: energy-ncr.awk:62: ^ syntax error Node 35 is awk: energy-ncr.awk:59: } awk: energy-ncr.awk:59: ^ syntax error awk: energy-ncr.awk:62: } awk: energy-ncr.awk:62: ^ syntax error Node 36 is awk: energy-ncr.awk:59: } awk: energy-ncr.awk:59: ^ syntax error awk: energy-ncr.awk:62: } awk: energy-ncr.awk:62: ^ syntax error Node 37 is Total Number of Sefiish Nodes are: 0 Totl Number of Normal Nodes are:38
EDIT by Ed Morton: here are the OPs 2 first awk scripts formatted by gawk -o- so they have indentation, etc. that make the code much easier to understand: Script 1: BEGIN { n = 38 SelfishCounter = 0 Normalcounter = 0 } { # Trace line format: energy event = $1 time = $2 if (event == "r" || event == "d" || event == "s" || event == "f") { node_id = $3 energy = $14 } if (event == "N") { node_id = $5 energy = $7 } # Store remaining energy finalenergy[node_id] = energy } END { # finalenergy for each node for (i in finalenergy) { finalenergy[i] totalenergy = 0 for (i = 0; i <= n; i = i + 1) { totalenergy += finalenergy[i] } } ###compute average energy threshold = totalenergy / n ####output for (i = 0; i < n; i++) { if (threshold > finalenergy[i]) { SelfishCounter++ } else if (threshold < finalenergy[i]) { Normalcounter++ } } printf "number of selfish nodes:%d \n", SelfishCounter printf "number of normal nodes:%d \n", Normalcounter }
Script 2: BEGIN { ReqCounter = 0 RepCounter = 0 NCRCounter = 0 Normalcounter = 0 max_node = 0 } { action = $1 if (action == "s" || action == "r" || action == "f") { if (($33 == "REQUEST") && ($5 == node)) { ReqCounter++ } if (($33 == "REPLY") && ($5 == node)) { RepCounter++ } } } END { NCR = ((ReqCounter - (ReqCounter - RepCounter)) / ReqCounter) * 100 if (NCR <= "30") { NCRCounter++ printf "SELFISH\n" } else { Normalcounter++ printf "NORMAL\n" } # printf "The Node number is:%d \n", node; # printf "The NCRis:%d \n", NCR; #printf "REQUEST Count:%d \n", ReqCounter; #printf "REPLY Count:%d \n", RepCounter; }
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| Convert a date from DD-MM-YYYY to YYYY-MM-DD format in bash LINUX Posted: 22 Jul 2021 09:30 AM PDT Scenario: I am fetching a date value from a file into a variable and it is in DD-MM-YYYY format by default. I have to substract this date from system date. Subtraction is giving incorrect result if I had both dates in DD-MM-YYYY format. So I read a bit on google and decided to format both dates as YYYY-MM-DD as this will give correct value after subtraction. I have System date formatted successfully in YYYY-MM-DD, but facing a hard time to convert the date obtained from the file to YYYY-MM-DD format. Below solution works fine with single digit dates: $ date -d $(sed "s/-/\//g" <<< '9-2-1832') +%Y-%m-%d Output : 1832-09-02
but when I try to convert date in double digits like below: $ date -d $(sed "s/-/\//g" <<< '19-07-2021') +%Y-%m-%d
I get output Invalid date '19/07/2021'
Where: 19 - is Date of a month 07 - is Month i.e. July in this case. 2021 - is Year
Desired output as -> 2021-07-19 I am working on RH Linux with Date version as: date (GNU coreutils) 8.22 Please help to provide a solution for above problem.  |
| No Wi-Fi Adapter Found Error On Pop-OS Posted: 22 Jul 2021 09:25 AM PDT So, I installed Pop-OS on my HP laptop, but when I went to connect the internet all I can do is enable Airplane Mode, and below that it says "No Wi-Fi Adapter Found" "Make sure you have a Wi-Fi adapter plugged and turned on." My question is, what does this mean, and how can I fix it. Wi-Fi Adapter: 10ec:c821 uname -a: Linux pop-os 5.8.0-7642-generic #47~1614007149~20.19~82fb226-Ubuntu SMP Tue Feb 23 02:59:01 UTC x86_64 x86_64 x86_64 GNU/Linux Laptop Model: HP Laptop 15-ef0xxx  |
| USB device won't turn off on shutdown or suspend Posted: 22 Jul 2021 08:56 AM PDT I am communicating with a USB device (LED screen) serially, via ttyUSB0 (visible in /dev/ttyUSB0). However, it will not power off on shutdown or on suspend. Only via the terminal command 'reboot' or if I close the software communicating with the device. Does anyone know why? I've tried manipulating the settings in /sys/bus/usb/devices/usb1/power with little effect. System: Debian 8 (Jessie)  |
| Unvisible application content within VNC / XFCE Posted: 22 Jul 2021 08:02 AM PDT I do have a weird render issue of some applications that I'm running within a tigervnc session on a remote host where XFCE is started. As you can see from the screenshot, while applications display correctly their content (e.g. file browser, visual studio code, ..), the matlab window does not show its content. I believe this is not a matlab related issue since If I run matlab through a "ssh -X" session on the same host, it is displayed properly. It might be related, I have also seen that kind of rendering issue with matplotlib when triggering the pyplot.show(), the image is kind of transparent and we see the image to display mixed with the desktop background image. 
If necessary, the xstartup script is #!/bin/sh # Start Xfce4 Desktop [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources vncconfig -iconic & dbus-launch --exit-with-session xfce4-session &
and the vncserver is ran with vncserver -SecurityTypes None -depth 32 -geometry 1680x1050 -cleanstale Thank you very much for your help  |
| installing Realtek 8821ce on RHEL 8 Posted: 22 Jul 2021 10:03 AM PDT I am trying to install my wifi card driver on RHEL 8 for the 8821CE. I am temporarily using an 88XXau for a usb wifi adapter. I've been looking for a solution for a while and came across two main git repos: https://github.com/lwfinger/rtlwifi_new/tree/rtw88 https://github.com/tomaspinho/rtl8821ce/ the rtw88 still doesn't support the 8821CE Card as far as I can tell. I managed to install the /tomaspinho dkms module after editing the code and following the issues section to solve compilation problems related to kernel version: https://github.com/tomaspinho/rtl8821ce/issues?q=centos This basically involved changing some ifdef definitions to suit the old kernel that is using recent or backported code to my knowledge. Now I am at a point where the dkms module installed correctly and I can see the module loaded in lsmod output, but the card is still not detected and I wonder what I can do from this point forward. Thank you in advance for your help. lsmod: lsmod | grep 8821 8821ce 2023424 0 cfg80211 806912 2 88XXau,8821ce
kernel: uname -r 4.18.0-193.1.2.el8_2.x86_64
dmesg: dmesg | grep 8821 [ 0.758821] pci_bus 0000:00: root bus resource [mem 0xfee00000-0xffffffff window] [ 3.187034] 8821ce: loading out-of-tree module taints kernel. [ 3.218784] rtl8821ce 0000:02:00.0: enabling device (0000 -> 0003) [ 3.248873] Modules linked in: crc32_pclmul(+) 8821ce(OE+) 88XXau(OE+) crc32c_intel amd_iommu_v2 gpu_sched i2c_algo_bit ttm hid_logitech_hidpp drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cfg80211 nvme drm ghash_clmulni_intel serio_raw r8169 nvme_core rfkill realtek pinctrl_amd hid_logitech_dj dm_mirror dm_region_hash dm_log dm_mod [ 3.248981] ? rtw_chbw_to_freq_range+0x40/0x96 [8821ce] [ 3.249021] ? rtw_is_dfs_ch+0x34/0x70 [8821ce] [ 3.249067] ? rtw_regd_apply_flags+0xc9/0xda [8821ce] [ 3.249113] rtw_wiphy_register+0x1e/0x20 [8821ce] [ 3.249159] rtw_cfg80211_ndev_res_register+0x11/0x17 [8821ce] [ 3.249203] rtw_os_ndev_register+0xf2/0x157 [8821ce] [ 3.249248] rtw_os_ndevs_register+0x9e/0xce [8821ce] [ 3.249292] rtw_os_ndevs_init+0x24/0x3a [8821ce] [ 3.249334] rtw_drv_init+0x4f/0xac [8821ce] [ 3.249389] rtw_drv_entry+0x48/0x1000 [8821ce] [ 3.249485] WARNING: CPU: 6 PID: 528 at /var/lib/dkms/rtl8821ce/v5.5.2_34066.20200325/build/os_dep/linux/os_intfs.c:1681 rtw_os_ndev_register+0x64/0x157 [8821ce] [ 3.249485] Modules linked in: crc32_pclmul(+) 8821ce(OE+) 88XXau(OE+) crc32c_intel amd_iommu_v2 gpu_sched i2c_algo_bit ttm hid_logitech_hidpp drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cfg80211 nvme drm ghash_clmulni_intel serio_raw r8169 nvme_core rfkill realtek pinctrl_amd hid_logitech_dj dm_mirror dm_region_hash dm_log dm_mod [ 3.249537] RIP: 0010:rtw_os_ndev_register+0x64/0x157 [8821ce] [ 3.249589] rtw_os_ndevs_register+0x9e/0xce [8821ce] [ 3.249632] rtw_os_ndevs_init+0x24/0x3a [8821ce] [ 3.249675] rtw_drv_init+0x4f/0xac [8821ce] [ 3.249722] rtw_drv_entry+0x48/0x1000 [8821ce] [ 3.258088] WARNING: CPU: 6 PID: 528 at /var/lib/dkms/rtl8821ce/v5.5.2_34066.20200325/build/os_dep/linux/os_intfs.c:3141 rtw_os_ndevs_register+0xa6/0xce [8821ce] [ 3.258090] Modules linked in: crct10dif_pclmul(+) crc32_pclmul 8821ce(OE+) 88XXau(OE+) crc32c_intel amd_iommu_v2 gpu_sched i2c_algo_bit ttm hid_logitech_hidpp drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cfg80211 nvme drm ghash_clmulni_intel serio_raw r8169 nvme_core rfkill realtek pinctrl_amd hid_logitech_dj dm_mirror dm_region_hash dm_log dm_mod [ 3.258154] RIP: 0010:rtw_os_ndevs_register+0xa6/0xce [8821ce] [ 3.258215] rtw_os_ndevs_init+0x24/0x3a [8821ce] [ 3.258262] rtw_drv_init+0x4f/0xac [8821ce] [ 3.258319] rtw_drv_entry+0x48/0x1000 [8821ce] [ 10.280025] Bluetooth: hci0: rtl: examining hci_ver=08 hci_rev=000c lmp_ver=08 lmp_subver=8821 [ 10.280028] Bluetooth: hci0: rtl: loading rtl_bt/rtl8821c_config.bin [ 10.283364] Bluetooth: hci0: rtl: loading rtl_bt/rtl8821c_fw.bin [ 21.489998] dm_crypt amdgpu crct10dif_pclmul crc32_pclmul 8821ce(OE) 88XXau(OE) crc32c_intel amd_iommu_v2 gpu_sched i2c_algo_bit ttm hid_logitech_hidpp drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cfg80211 nvme drm ghash_clmulni_intel serio_raw r8169 nvme_core rfkill realtek pinctrl_amd hid_logitech_dj dm_mirror dm_region_hash dm_log dm_mod
ifconfig(wlp4s0f3u2 is my usb wifi adapter): ifconfig -a eno1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether f8:b4:6a:b5:fb:23 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 6454 bytes 443527 (433.1 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 6454 bytes 443527 (433.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:74:aa:45 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0-nic: flags=4098<BROADCAST,MULTICAST> mtu 1500 ether 52:54:00:74:aa:45 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wlp4s0f3u2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 2312 inet 192.168.2.22 netmask 255.255.255.0 broadcast 192.168.2.255 inet6 fe80::e1d3:1071:71d9:6b63 prefixlen 64 scopeid 0x20<link> .....
I can see the card with this command, but I am not sure if it is due to the driver or not: lshw -C network *-network UNCLAIMED description: Network controller product: RTL8821CE 802.11ac PCIe Wireless Network Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: cap_list configuration: latency=0 resources: ioport:f000(size=256) memory:fe900000-fe90ffff
Update Since I am trying different drivers, I am blacklisting them at /etc/modprob.d to make sure only one loads at a time, please let me know if this is enough I opened an issue at rtw88(https://github.com/lwfinger/rtlwifi_new/issues/608), they confirm the firmware was missing and added that to the repo, but this created an new issue: [ 12.378158] rtw_8821ce 0000:02:00.0: Firmware version 24.5.0, H2C version 12 [ 12.404834] rtw_8821ce 0000:02:00.0: rfe 2 isn't supported [ 12.404937] rtw_8821ce 0000:02:00.0: failed to setup chip efuse info [ 12.404939] rtw_8821ce 0000:02:00.0: failed to setup chip information
Update 2 This has been resolved with rtw88 driver by lwfinger after his updates to the code base. the driver works as intended now for the 8821ce!  |
| No sound in OBS from capturing destop audio Posted: 22 Jul 2021 10:02 AM PDT I'm using Archlinux with up to date soft. I have set desktop capture with sound in OBS, but the red volume range doesn't change at all, though I have played music in the browser, nor sound is recorded at all. If I add mic capturing it works. If I start and stop recording the video file doesn't have audio as well Here's the screen: 
and obs logs: Attempted path: share/obs/obs-studio/locale.ini Attempted path: /usr/share/obs/obs-studio/locale.ini Attempted path: share/obs/obs-studio/themes/Dark.qss Attempted path: /usr/share/obs/obs-studio/themes/Dark.qss info: CPU Name: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz info: CPU Speed: 2725.460MHz info: Physical Cores: 4, Logical Cores: 8 info: Physical Memory: 32046MB Total, 22761MB Free info: Kernel Version: Linux 5.1.15-arch1-1-ARCH info: Distribution: "Arch Linux" Unknown info: Window System: X11.0, Vendor: The X.Org Foundation, Version: 1.20.5 info: Portable mode: false Attempted path: share/obs/obs-studio/themes/Dark/no_sources.svg Attempted path: /usr/share/obs/obs-studio/themes/Dark/no_sources.svg QMetaObject::connectSlotsByName: No matching signal for on_advAudioProps_clicked() QMetaObject::connectSlotsByName: No matching signal for on_advAudioProps_destroyed() QMetaObject::connectSlotsByName: No matching signal for on_program_customContextMenuRequested(QPoint) info: OBS 23.2.1-2 (linux) info: --------------------------------- info: --------------------------------- info: audio settings reset: samples per sec: 44100 speakers: 2 info: --------------------------------- info: Initializing OpenGL... info: Loading up OpenGL on adapter NVIDIA Corporation GeForce GTX 970M/PCIe/SSE2 info: OpenGL loaded successfully, version 3.2.0 NVIDIA 430.26, shading language 1.50 NVIDIA via Cg compiler info: --------------------------------- info: video settings reset: base resolution: 1920x1080 output resolution: 1280x720 downscale filter: Bicubic fps: 60/1 format: NV12 YUV mode: 601/Partial info: NV12 texture support not available info: Audio monitoring device: name: Default id: default info: --------------------------------- warning: Failed to load 'en-US' text for module: 'decklink-ouput-ui.so' libDeckLinkAPI.so: cannot open shared object file: No such file or directory info: No blackmagic support info: NVENC supported info: FFMPEG VAAPI supported info: VLC found, VLC video source enabled info: --------------------------------- info: Loaded Modules: info: vlc-video.so info: text-freetype2.so info: rtmp-services.so info: obs-x264.so info: obs-transitions.so info: obs-outputs.so info: obs-libfdk.so info: obs-filters.so info: obs-ffmpeg.so info: linux-v4l2.so info: linux-pulseaudio.so info: linux-jack.so info: linux-decklink.so info: linux-capture.so info: linux-alsa.so info: image-source.so info: frontend-tools.so info: decklink-ouput-ui.so info: --------------------------------- info: ==== Startup complete =============================================== info: All scene data cleared info: ------------------------------------------------ info: pulse-input: Server name: 'pulseaudio 12.2' info: pulse-input: Audio format: s16le, 48000 Hz, 6 channels info: pulse-input: Started recording from 'alsa_output.usb-Creative_Technology_Ltd_SB_Omni_Surround_5.1_000000Hk-00.analog-surround-51.monitor' info: pulse-am: Prevented feedback-loop in 'default' info: Switched to scene 'Scene 2' info: ------------------------------------------------ info: Loaded scenes: info: - scene 'Scene 2': info: - source: 'Desktop Audio' (pulse_output_capture) info: - monitoring: monitor and output info: ------------------------------------------------ Attempted path: share/obs/obs-studio/images/overflow.png Attempted path: /usr/share/obs/obs-studio/images/overflow.png info: adding 23 milliseconds of audio buffering, total audio buffering is now 23 milliseconds (source: Desktop Audio) info: adding 23 milliseconds of audio buffering, total audio buffering is now 46 milliseconds (source: Desktop Audio) qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 4692, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 4715, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 4725, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 4747, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5023, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5037, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5040, resource id: 146800806, major code: 130 (Unknown), minor code: 3 info: --------------------------------- info: [NVENC encoder: 'simple_h264_recording'] settings: rate_control: CQP bitrate: 0 cqp: 21 keyint: 250 preset: hq profile: high width: 1280 height: 720 2-pass: false b-frames: 2 GPU: 0 [h264_nvenc @ 0x5592daaf5640] Using global_quality with nvenc is deprecated. Use qp instead. info: libfdk_aac encoder created info: libfdk_aac bitrate: 128, channels: 2 info: ==== Recording Start =============================================== info: [ffmpeg muxer: 'simple_file_output'] Writing file '/home/andrew/Pictures/2019-07-07 11-37-05.flv'... [flv @ 0x55605eb64680] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [flv @ 0x55605eb64680] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 8830, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 8844, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 8847, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 8859, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9154, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9176, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9186, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9202, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9222, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9238, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9253, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9263, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9284, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9295, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9329, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9345, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9356, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9377, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 9388, resource id: 146800806, major code: 130 (Unknown), minor code: 3 info: [ffmpeg muxer: 'simple_file_output'] Output of file '/home/andrew/Pictures/2019-07-07 11-37-05.flv' stopped info: Output 'simple_file_output': stopping info: Output 'simple_file_output': Total frames output: 205 info: Output 'simple_file_output': Total drawn frames: 219 info: ==== Recording Stop ================================================ info: libfdk_aac encoder destroyed qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 10954, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 10972, resource id: 146800806, major code: 130 (Unknown), minor code: 3 qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 10975, resource id: 146800806, major code: 130 (Unknown), minor code: 3 info: ==== Shutting down ================================================== info: Switched to scene '(null)' info: pulse-input: Stopped recording from 'alsa_output.usb-Creative_Technology_Ltd_SB_Omni_Surround_5.1_000000Hk-00.analog-surround-51.monitor' info: pulse-input: Got 5473 packets with 954139 frames info: All scene data cleared info: ------------------------------------------------ error: X Error: GLXBadDrawable, Major opcode: 152, Minor opcode: 26, Serial: 13246 error: Failed to make context current. error: X Error: GLXBadDrawable, Major opcode: 152, Minor opcode: 26, Serial: 13248 error: Failed to make context current. error: X Error: GLXBadDrawable, Major opcode: 152, Minor opcode: 26, Serial: 13250 error: Failed to make context current. error: Failed to fetch parent window geometry! error: X Error: BadDrawable (invalid Pixmap or Window parameter), Major opcode: 152, Minor opcode: BadLength (poly request too large or internal Xlib length error), Serial: 13252 error: X Error: GLXBadDrawable, Major opcode: 152, Minor opcode: BadAlloc (insufficient resources for operation), Serial: 13253 error: X Error: GLXBadDrawable, Major opcode: 152, Minor opcode: 26, Serial: 13255 error: Failed to make context current. error: X Error: GLXBadDrawable, Major opcode: 152, Minor opcode: 26, Serial: 13257 error: Failed to make context current. info: Freeing OBS context data info: [Scripting] Total detached callbacks: 0 info: == Profiler Results ============================= info: run_program_init: 521.116 ms info: ┣OBSApp::AppInit: 2.79 ms info: ┃ ┗OBSApp::InitLocale: 0.794 ms info: ┗OBSApp::OBSInit: 406.532 ms info: ┣obs_startup: 1.109 ms info: ┗OBSBasic::OBSInit: 319.535 ms info: ┣OBSBasic::InitBasicConfig: 0.085 ms info: ┣OBSBasic::ResetAudio: 0.101 ms info: ┣OBSBasic::ResetVideo: 142.398 ms info: ┣OBSBasic::InitOBSCallbacks: 0.002 ms info: ┣OBSBasic::InitHotkeys: 0.028 ms info: ┣obs_load_all_modules: 90.765 ms info: ┃ ┣obs_init_module(decklink-ouput-ui.so): 0.668 ms info: ┃ ┣obs_init_module(frontend-tools.so): 57.176 ms info: ┃ ┣obs_init_module(image-source.so): 0.004 ms info: ┃ ┣obs_init_module(linux-alsa.so): 0.001 ms info: ┃ ┣obs_init_module(linux-capture.so): 0.221 ms info: ┃ ┣obs_init_module(linux-decklink.so): 0.103 ms info: ┃ ┣obs_init_module(linux-jack.so): 0.001 ms info: ┃ ┣obs_init_module(linux-pulseaudio.so): 0.001 ms info: ┃ ┣obs_init_module(linux-v4l2.so): 0 ms info: ┃ ┣obs_init_module(obs-ffmpeg.so): 0.678 ms info: ┃ ┃ ┗nvenc_check: 0.613 ms info: ┃ ┣obs_init_module(obs-filters.so): 0.008 ms info: ┃ ┣obs_init_module(obs-libfdk.so): 0.001 ms info: ┃ ┣obs_init_module(obs-outputs.so): 0.001 ms info: ┃ ┣obs_init_module(obs-transitions.so): 0.004 ms info: ┃ ┣obs_init_module(obs-x264.so): 0 ms info: ┃ ┣obs_init_module(rtmp-services.so): 0.108 ms info: ┃ ┣obs_init_module(text-freetype2.so): 0.005 ms info: ┃ ┗obs_init_module(vlc-video.so): 1.911 ms info: ┣OBSBasic::ResetOutputs: 0.08 ms info: ┣OBSBasic::CreateHotkeys: 0.022 ms info: ┣OBSBasic::InitService: 0.927 ms info: ┣OBSBasic::InitPrimitives: 0.181 ms info: ┗OBSBasic::Load: 8.247 ms info: obs_hotkey_thread(25 ms): min=0.057 ms, median=0.214 ms, max=65.179 ms, 99th percentile=4.116 ms, 99.7484% below 25 ms info: audio_thread(Audio): min=0 ms, median=0.185 ms, max=1.611 ms, 99th percentile=0.662 ms info: ┗receive_audio: min=0.007 ms, median=0.274 ms, max=1.542 ms, 99th percentile=0.46 ms, 0.185484 calls per parent call info: ┣buffer_audio: min=0 ms, median=0.001 ms, max=0.013 ms, 99th percentile=0.007 ms info: ┗do_encode: min=0.079 ms, median=0.269 ms, max=1.54 ms, 99th percentile=0.451 ms info: ┗encode(simple_aac_recording): min=0.076 ms, median=0.26 ms, max=0.442 ms, 99th percentile=0.419 ms info: obs_graphics_thread(16.6667 ms): min=0.159 ms, median=1.387 ms, max=46.546 ms, 99th percentile=6.108 ms, 99.5008% below 16.667 ms info: ┣tick_sources: min=0.001 ms, median=0.013 ms, max=0.165 ms, 99th percentile=0.024 ms info: ┣output_frame: min=0.115 ms, median=0.554 ms, max=46.428 ms, 99th percentile=3.382 ms info: ┃ ┣gs_context(video->graphics): min=0.115 ms, median=0.548 ms, max=46.427 ms, 99th percentile=2.913 ms info: ┃ ┃ ┣render_video: min=0.01 ms, median=0.175 ms, max=2.029 ms, 99th percentile=0.749 ms info: ┃ ┃ ┃ ┣render_main_texture: min=0.006 ms, median=0.137 ms, max=0.727 ms, 99th percentile=0.217 ms info: ┃ ┃ ┃ ┣render_output_texture: min=0.001 ms, median=0.166 ms, max=1.514 ms, 99th percentile=0.305 ms, 0.182196 calls per parent call info: ┃ ┃ ┃ ┣render_convert_texture: min=0.001 ms, median=0.113 ms, max=0.706 ms, 99th percentile=0.357 ms, 0.182196 calls per parent call info: ┃ ┃ ┃ ┗stage_output_texture: min=0 ms, median=0.083 ms, max=1.045 ms, 99th percentile=0.827 ms, 0.182196 calls per parent call info: ┃ ┃ ┣gs_flush: min=0.001 ms, median=0.027 ms, max=2.978 ms, 99th percentile=0.077 ms info: ┃ ┃ ┗download_frame: min=0 ms, median=0.005 ms, max=0.01 ms, 99th percentile=0.01 ms, 0.182196 calls per parent call info: ┃ ┗output_video_data: min=0.14 ms, median=0.374 ms, max=2.579 ms, 99th percentile=2.108 ms, 0.178869 calls per parent call info: ┗render_displays: min=0.042 ms, median=0.796 ms, max=18.382 ms, 99th percentile=2.181 ms info: video_thread(video): min=0.481 ms, median=1.197 ms, max=3.82 ms, 99th percentile=2.036 ms info: ┗receive_video: min=0.48 ms, median=1.194 ms, max=3.817 ms, 99th percentile=2.033 ms info: ┗do_encode: min=0.479 ms, median=1.193 ms, max=3.816 ms, 99th percentile=2.031 ms info: ┗encode(simple_h264_recording): min=0.476 ms, median=1.181 ms, max=3.81 ms, 99th percentile=1.802 ms info: ================================================= info: == Profiler Time Between Calls ================== info: obs_hotkey_thread(25 ms): min=25.087 ms, median=25.296 ms, max=90.241 ms, 92.1914% within ±2% of 25 ms (0% lower, 7.80856% higher) info: obs_graphics_thread(16.6667 ms): min=3.436 ms, median=16.667 ms, max=46.557 ms, 98.6678% within ±2% of 16.667 ms (0.666112% lower, 0.666112% higher) info: ================================================= info: Number of memory leaks: 0
I have installed this version of sotware: local/obs-studio 23.2.1-2 local/linux 5.1.15.arch1- local/alsa-lib 1.1.9-1 local/alsa-plugins 1.1.9-2 local/alsa-tools 1.1.7-1 local/alsa-utils 1.1.9-1 local/lib32-alsa-lib 1.1.9-1 local/lib32-alsa-plugins 1.1.9-1 local/pulseaudio-alsa 2-4 local/zita-alsa-pcmi 0.3.2-1 local/lib32-libpulse 12.2-1 local/libcanberra-pulse 0.30+2+gc0620e4-2 local/pulseaudio 12.2-2
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| Ubuntu server second network card is disabled Posted: 22 Jul 2021 09:07 AM PDT I have a physical server that has two network cards. One of them is on the motherboard (card A) and the other is a new one that I added by myself (card B). this command: lshw -class network
show that card A is active by default, no problem there. But card B is disabled, so I use: sudo ifconfig enp3s0 up
to enabling card B. (enp3s0 is Card B logical name). After this, I just want to set a static IP for card b. and for this purpose I used these commands: ifconfig enp3s0 "My Ip" netmask 255.255.0 up route add default gw "My Ip" echo "nameserver 8.8.8.8"> /etc/resolve.conf
then I ping google, and everything is fine. But, after a reboot Card B loose all the setting and become disabled again. So I did some search and I did find out that I need to do some static Ip setting. I use sudo nano /etc/network/interfaces
to add static IP. and add this to interface file: auto enp3s0 iface enp3s0 inet loopback iface enp3s0 iface enp3s0 inet static address "my ip" netmask 255.255.255.0 gw "my ip" dns-nameservers 8.8.4.4 8.8.8.8
After reboot, this setting is there, but Card B is disabled again. for sums up, my question is, how to enable second network card permanently and how to set static Ip for it? P.S: I have some network setting so I can't reset the network.  |
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