| Ubuntu UEFI entry point missing Posted: 20 Mar 2021 10:18 AM PDT I originally had Ubuntu 20.10 installed on my HDD without any booting problem. Days ago my HDD broke down and I decided to migrate to a new SSD. I installed Ubuntu 20.10 on the SSD just like before, but was unable to find any UEFI entry after reboot. I followed this post together with this tutorial and managed to recover an entry using a Live USB (sudo efibootmgr -v displays an Ubuntu entry). However, after rebooting the PC the entry was still missing, and the Ubuntu entry seemed to have disappeared from sudo efibootmgr -v. - OS: Ubuntu 20.10
- Motherboard: Asrock Z97 Extreme6
- SSD: Western Digital SN550
Your help will be greatly appreciated!  |
| deb version is "git tag+git commit hash" = apt downloading the wrong version from my apt repo Posted: 20 Mar 2021 10:12 AM PDT I made a script that compiles a program (box86), packages it into a debian package every week, and uploads it to my apt repo (hosted on github).
for the version of each package I use the git tag (0.2.1 for example) and the git commit hash (638b341 for example) and put them like this: tag+sha1 (0.2.1+638b341 for example). note that checkinstall that is used for packaging adds a -1 to the end, so in my example, the version would be 0.2.1+638b341-1. after adding the repo to my apt sources, apt gets the wrong version. I tried several fixes including adding a "epoch", incrementing the -1, and adding a number before and incrementing it in each version (1-version). but none of them worked (or would be practical). I'm pretty sure I have to add something to the version, but I don't know what. any help is appreciated.  |
| Automatic replies to certain e-mails Posted: 20 Mar 2021 09:48 AM PDT I would like to send automatic replies to e-mails with certain characteristics and have the impression that the dovecot pigeonhole plugin can do this, but I'm confused about what I need to get it to work. I now use fdm to fetch mail and Dovecot to make it available to Gnus. But it seems that, for some reason, in order to get sieve/pigeonhole to work, I must use lmtp, which in turn requires Postfix(?) Does that mean that I should use Postfix instead of fdm to fetch mail? How do I do that? (I have found some instructions, but they all presuppose I know all sorts of things I don't, and I suspect that they are intended for cases that are more complicated than mine, such as that of a real mail server.)  |
| vm.max_map_count for a running process? Posted: 20 Mar 2021 09:37 AM PDT Is there a way to determine vm.max_map_count for a running process? I'm using Ubuntu 18.04  |
| Verified good `mkisofs` for CentOS 8? Posted: 20 Mar 2021 09:27 AM PDT I'm running through the steps to add a kickstart to a CentOS 8 ISO. I've looked at Red Hat's documentation for RHEL5 through RHEL8, and several probably outdated web pages. - I know the
dd command to burn the new ISO works with an unmodified ISO. The USB drive is bootable in that case. - I know I have a good kickstart file.
- I've made the modifications to
isolinux/isolinux.cfg to add ks=cdrom:/ks.cfg. - I even found the documentation about adding
inst.ks=cdrom:/ks.cfg to EFI/BOOT/grub.cfg. And in every case, mkisofs still won't make a bootable USB drive. The USB drive is readable, once the regular OS is running and it's bootable if I dd the existing ISO onto it. I think I've ruled out everything except for something missing in this command. (The -V volume name is taken directly from running the blkid command on the downloaded base ISO.) mkisofs \ -o ../CentOS-8.3.2011-x86_64-ks.iso \ -b isolinux/isolinux.bin \ -J -R -l -v \ -c isolinux/boot.cat \ -no-emul-boot \ -boot-load-size 4 \ -boot-info-table \ -eltorito-alt-boot \ -graft-points \ -V "CentOS-8-3-2011-x86_64-dvd" .
Once I have this part figured out, I'll document the whole process. Everything I've found out there right now is at least two years old.  |
| How to get a list of unused kernel modules of currently running system? (Static and loaded) Posted: 20 Mar 2021 09:36 AM PDT There are a lot of interesting kernel modules. Thanks to the linux kernel, I now know there is such a thing as a "Lego Infrared Tower". I'm trying to slim down my linux kernel beyond the point of things I obviously dont need. To do this, I need a programmatic way to find the unused kernel modules currently in my system. I know about 'lsmod'. But that's very far away from what I'm looking for. *** The reverse approach - by elimination *** What I might need to achieve this result is a way to determine which statically compiled and loaded modules currently are in use. These are the ones selected by "*" in the menuconfig and not just "M" I think i already might a way to "cross out" each of those modules in the .config file of the current kernel, because it is possible to map module names to config names using a grep command as described here: Binding lsmod module name with kernel configuration menu entry though I am not sure how consistently that will work. So what I have already is the .config file and the kernel sources and that grep command from that link above. The bottleneck is the first list of statically-used and loadedly- used kernel modules. This is perhaps a "best effort" question. It is as difficult to completely clean a kernel as it is to completely clean a bedroom. When my bedroom is clean, there is still some dust here and there. These are the same expectations I would expect for an answer to this question. With any resulting list, more manual filtering will be needed, because I dont think I am constantly using things like DNS name resolutions, though I do need those intermittently. But there has to be faster way to clean a kernel than recompiling the kernel every few hours with less and less modules each time. Or is there a more common strategy?  |
| String RSA Encrypt with Public Key in bash? Posted: 20 Mar 2021 08:26 AM PDT I want to crypt a String with bash, Example: (No longer i using this keys after sharing. D'ont worry about this.) ~/.myprogram.publickey.txt MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDtafZU77OYTutFUHYBDjHBV7IJBdcIQ9in9lI/nGrENuVSEekcnSVhEISgkLUavxbPRjFyGtuG4zk1QgK4Y4vszVtcI13pemm1sOVM7ATF1Yh+dgJ5BTxxLe267s1BdIU+sJX+zBR4zKy2uaJb2dJgC40+VJcpETQTT/GivkcScQIDAQAB
Here is Private key for testing: 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
String: meow Crypt output by online tool: https://www.devglan.com/online-tools/rsa-encryption-decryption SqxCpp34eOCqjlHy3qdztdherafLvWdJ3AAqbyH5E3YyTBh77nzi0VjVz9ZZfpNhgAvobr9i4OLd/qDQnknsbbwkJ7Funp1L5RsAMKBP/AHKXpnYh+b+5vkpLqc2rrTZ5K7FBJxGuEyraqFGpJFRo34c4tDshwZH7USoXK3OouM=
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| Why does my entire home network go down when I change my server's network settings? Posted: 20 Mar 2021 08:52 AM PDT How do I make sure my router (not my server) controls the entire network? I am attempting to create a bridge to bridge my two server's network cards. Every time I attempt to change anything in my network configuration on the server, my entire home network is taken down. I mean everything in the house, from cell phones to laptops to PC's, all lose connection until I either disconnect the server from the network or put the configuration back to its original state. Also, the change I make to the server also breaks the server's networking/internet connection, until I return it to its original state. Clearly, my router is relying on my server for something, but I don't know what or how to go about finding it. And I surely didn't set that up on purpose. On a side note, every change seems to require a server reboot which takes about 12 minutes, so experimenting is very time consuming and has made this difficult to figure out. Here's a basic layout of my home network:  I'm not sure if this is relevant or not, but I have given my server a static IP via my router: ROUTER SCREENSHOT  Some other miscellaneous points which may or may not be relevant: - I installed avahi in order to be able to call my server by servername.local
- The server works great, as long as I don't mess with the networking (nextcloud, webmin, phpmyadmin, all work great)
- My home network includes MOCA devices which I did not put in the diagram
EDIT: Some additional screenshots that could be useful: SERVER SCREENSHOTS FROM WEBMIN     |
| How do I calculate sum of numbers from different rows? Posted: 20 Mar 2021 08:14 AM PDT I have a file containing numbers in many rows and 5 columns like this: 1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
... If I want to get sums of the numbers in the 1st row and 3rd row in this way: 1+11 2+12 3+13 4+14 5+15 which means what I want to see finally is 12 14 16 18 20
What should I do?  |
| Port is open but external IPs have no access Posted: 20 Mar 2021 07:32 AM PDT My MongoDB is running under a docker container. On the server, I can confirm that port 27017 is open. MongoDB IP Bind is set to 0.0.0.0 to /etc/mongod.conf nmap -p 27017 127.0.0.1 PORT STATE SERVICE 27017/tcp open mongod
IpTables also have the rule Chain INPUT (policy ACCEPT) ACCEPT tcp -- localhost.localdomain localhost.localdomain tcp dpt:27017 ACCEPT tcp -- anywhere anywhere tcp dpt:27017
Also netstat reports Listening (No info could be read for "-p": geteuid()=1004 but you should be root.) Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:6379 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN - tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN - tcp6 0 0 :::6379 :::* LISTEN - tcp6 0 0 :::22 :::* LISTEN - tcp6 0 0 :::3001 :::* LISTEN - tcp6 0 0 :::3002 :::* LISTEN - tcp6 0 0 :::443 :::* LISTEN - tcp6 0 0 :::9090 :::* LISTEN - udp 0 0 0.0.0.0:10000 0.0.0.0:* - udp 0 0 127.0.0.53:53 0.0.0.0:* -
From my computer nmap reports that the port is filtered nmap -p 27017 xxxx.xxxxx.xxxxx PORT STATE SERVICE 27017/tcp filtered mongod
How can I have access remotely to port 27017? What else to check? EDIT : List of iptables -L -v Chain INPUT (policy DROP 52 packets, 2544 bytes) pkts bytes target prot opt in out source destination 2469 164K f2b-sshd tcp -- any any anywhere anywhere multiport dports ssh 2758 180K ACCEPT tcp -- any any localhost.localdomain localhost.localdomain tcp dpt:27017 4189 500K ufw-before-logging-input all -- any any anywhere anywhere 4189 500K ufw-before-input all -- any any anywhere anywhere 1136 119K ufw-after-input all -- any any anywhere anywhere 1130 119K ufw-after-logging-input all -- any any anywhere anywhere 1130 119K ufw-reject-input all -- any any anywhere anywhere 1130 119K ufw-track-input all -- any any anywhere anywhere 0 0 ACCEPT tcp -- any any anywhere anywhere tcp dpt:27017 Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 DOCKER-USER all -- any any anywhere anywhere 0 0 DOCKER-ISOLATION-STAGE-1 all -- any any anywhere anywhere 0 0 ACCEPT all -- any docker0 anywhere anywhere ctstate RELATED,ESTABLISHED 0 0 DOCKER all -- any docker0 anywhere anywhere 0 0 ACCEPT all -- docker0 !docker0 anywhere anywhere 0 0 ACCEPT all -- docker0 docker0 anywhere anywhere 0 0 ufw-before-logging-forward all -- any any anywhere anywhere 0 0 ufw-before-forward all -- any any anywhere anywhere 0 0 ufw-after-forward all -- any any anywhere anywhere 0 0 ufw-after-logging-forward all -- any any anywhere anywhere 0 0 ufw-reject-forward all -- any any anywhere anywhere 0 0 ufw-track-forward all -- any any anywhere anywhere Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 7585 1341K ufw-before-logging-output all -- any any anywhere anywhere 7585 1341K ufw-before-output all -- any any anywhere anywhere 1112 164K ufw-after-output all -- any any anywhere anywhere 1112 164K ufw-after-logging-output all -- any any anywhere anywhere 1112 164K ufw-reject-output all -- any any anywhere anywhere 1112 164K ufw-track-output all -- any any anywhere anywhere Chain DOCKER (1 references) pkts bytes target prot opt in out source destination Chain DOCKER-ISOLATION-STAGE-1 (1 references) pkts bytes target prot opt in out source destination 0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 anywhere anywhere 0 0 RETURN all -- any any anywhere anywhere Chain DOCKER-ISOLATION-STAGE-2 (1 references) pkts bytes target prot opt in out source destination 0 0 DROP all -- any docker0 anywhere anywhere 0 0 RETURN all -- any any anywhere anywhere Chain DOCKER-USER (1 references) pkts bytes target prot opt in out source destination 0 0 RETURN all -- any any anywhere anywhere Chain f2b-sshd (1 references) pkts bytes target prot opt in out source destination 2469 164K RETURN all -- any any anywhere anywhere Chain ufw-after-forward (1 references) pkts bytes target prot opt in out source destination Chain ufw-after-input (1 references) pkts bytes target prot opt in out source destination 6 468 ufw-skip-to-policy-input udp -- any any anywhere anywhere udp dpt:netbios-ns 0 0 ufw-skip-to-policy-input udp -- any any anywhere anywhere udp dpt:netbios-dgm 0 0 ufw-skip-to-policy-input tcp -- any any anywhere anywhere tcp dpt:netbios-ssn 0 0 ufw-skip-to-policy-input tcp -- any any anywhere anywhere tcp dpt:microsoft-ds 0 0 ufw-skip-to-policy-input udp -- any any anywhere anywhere udp dpt:bootps 0 0 ufw-skip-to-policy-input udp -- any any anywhere anywhere udp dpt:bootpc 0 0 ufw-skip-to-policy-input all -- any any anywhere anywhere ADDRTYPE match dst-type BROADCAST Chain ufw-after-logging-forward (1 references) pkts bytes target prot opt in out source destination 0 0 LOG all -- any any anywhere anywhere limit: avg 3/min burst 10 LOG level warning prefix "[UFW BLOCK] " Chain ufw-after-logging-input (1 references) pkts bytes target prot opt in out source destination 90 4292 LOG all -- any any anywhere anywhere limit: avg 3/min burst 10 LOG level warning prefix "[UFW BLOCK] " Chain ufw-after-logging-output (1 references) pkts bytes target prot opt in out source destination Chain ufw-after-output (1 references) pkts bytes target prot opt in out source destination Chain ufw-before-forward (1 references) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- any any anywhere anywhere ctstate RELATED,ESTABLISHED 0 0 ACCEPT icmp -- any any anywhere anywhere icmp destination-unreachable 0 0 ACCEPT icmp -- any any anywhere anywhere icmp time-exceeded 0 0 ACCEPT icmp -- any any anywhere anywhere icmp parameter-problem 0 0 ACCEPT icmp -- any any anywhere anywhere icmp echo-request 0 0 ufw-user-forward all -- any any anywhere anywhere Chain ufw-before-input (1 references) pkts bytes target prot opt in out source destination 1206 254K ACCEPT all -- lo any anywhere anywhere 1807 124K ACCEPT all -- any any anywhere anywhere ctstate RELATED,ESTABLISHED 0 0 ufw-logging-deny all -- any any anywhere anywhere ctstate INVALID 0 0 DROP all -- any any anywhere anywhere ctstate INVALID 0 0 ACCEPT icmp -- any any anywhere anywhere icmp destination-unreachable 0 0 ACCEPT icmp -- any any anywhere anywhere icmp time-exceeded 0 0 ACCEPT icmp -- any any anywhere anywhere icmp parameter-problem 27 1684 ACCEPT icmp -- any any anywhere anywhere icmp echo-request 0 0 ACCEPT udp -- any any anywhere anywhere udp spt:bootps dpt:bootpc 342 17584 ufw-not-local all -- any any anywhere anywhere 0 0 ACCEPT udp -- any any anywhere 224.0.0.251 udp dpt:mdns 0 0 ACCEPT udp -- any any anywhere 239.255.255.250 udp dpt:1900 342 17584 ufw-user-input all -- any any anywhere anywhere Chain ufw-before-logging-forward (1 references) pkts bytes target prot opt in out source destination Chain ufw-before-logging-input (1 references) pkts bytes target prot opt in out source destination Chain ufw-before-logging-output (1 references) pkts bytes target prot opt in out source destination Chain ufw-before-output (1 references) pkts bytes target prot opt in out source destination 3556 407K ACCEPT all -- any lo anywhere anywhere 2917 769K ACCEPT all -- any any anywhere anywhere ctstate RELATED,ESTABLISHED 39 2762 ufw-user-output all -- any any anywhere anywhere Chain ufw-logging-allow (0 references) pkts bytes target prot opt in out source destination 0 0 LOG all -- any any anywhere anywhere limit: avg 3/min burst 10 LOG level warning prefix "[UFW ALLOW] " Chain ufw-logging-deny (2 references) pkts bytes target prot opt in out source destination 0 0 RETURN all -- any any anywhere anywhere ctstate INVALID limit: avg 3/min burst 10 0 0 LOG all -- any any anywhere anywhere limit: avg 3/min burst 10 LOG level warning prefix "[UFW BLOCK] " Chain ufw-not-local (1 references) pkts bytes target prot opt in out source destination 312 16348 RETURN all -- any any anywhere anywhere ADDRTYPE match dst-type LOCAL 24 768 RETURN all -- any any anywhere anywhere ADDRTYPE match dst-type MULTICAST 6 468 RETURN all -- any any anywhere anywhere ADDRTYPE match dst-type BROADCAST 0 0 ufw-logging-deny all -- any any anywhere anywhere limit: avg 3/min burst 10 0 0 DROP all -- any any anywhere anywhere Chain ufw-reject-forward (1 references) pkts bytes target prot opt in out source destination Chain ufw-reject-input (1 references) pkts bytes target prot opt in out source destination Chain ufw-reject-output (1 references) pkts bytes target prot opt in out source destination Chain ufw-skip-to-policy-forward (0 references) pkts bytes target prot opt in out source destination 0 0 DROP all -- any any anywhere anywhere Chain ufw-skip-to-policy-input (7 references) pkts bytes target prot opt in out source destination 6 468 DROP all -- any any anywhere anywhere Chain ufw-skip-to-policy-output (0 references) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- any any anywhere anywhere Chain ufw-track-forward (1 references) pkts bytes target prot opt in out source destination Chain ufw-track-input (1 references) pkts bytes target prot opt in out source destination Chain ufw-track-output (1 references) pkts bytes target prot opt in out source destination 1 60 ACCEPT tcp -- any any anywhere anywhere ctstate NEW 38 2702 ACCEPT udp -- any any anywhere anywhere ctstate NEW Chain ufw-user-forward (1 references) pkts bytes target prot opt in out source destination Chain ufw-user-input (1 references) pkts bytes target prot opt in out source destination 3 180 ACCEPT tcp -- any any anywhere anywhere tcp dpt:http 0 0 ACCEPT udp -- any any anywhere anywhere udp dpt:80 10 516 ACCEPT tcp -- any any anywhere anywhere tcp dpt:https 0 0 ACCEPT udp -- any any anywhere anywhere udp dpt:443 0 0 ACCEPT tcp -- any any anywhere anywhere tcp dpt:27017 0 0 ACCEPT udp -- any any anywhere anywhere udp dpt:27017 0 0 ACCEPT tcp -- any any anywhere anywhere tcp dpt:27017 Chain ufw-user-limit (0 references) pkts bytes target prot opt in out source destination 0 0 LOG all -- any any anywhere anywhere limit: avg 3/min burst 5 LOG level warning prefix "[UFW LIMIT BLOCK] " 0 0 REJECT all -- any any anywhere anywhere reject-with icmp-port-unreachable Chain ufw-user-limit-accept (0 references) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- any any anywhere anywhere Chain ufw-user-logging-forward (0 references) pkts bytes target prot opt in out source destination Chain ufw-user-logging-input (0 references) pkts bytes target prot opt in out source destination Chain ufw-user-logging-output (0 references) pkts bytes target prot opt in out source destination Chain ufw-user-output (1 references) pkts bytes target prot opt in out source destination
firewall status ufw status Status: active To Action From -- ------ ---- 80 ALLOW Anywhere 443 ALLOW Anywhere 27017 ALLOW Anywhere 27017/tcp ALLOW Anywhere 80 (v6) ALLOW Anywhere (v6) 443 (v6) ALLOW Anywhere (v6) 27017 (v6) ALLOW Anywhere (v6) 27017/tcp (v6) ALLOW Anywhere (v6)
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| Windows Terminal no longer lists Ubuntu bash Posted: 20 Mar 2021 09:49 AM PDT I'm on Windows 10 Pro 10.0.21337 (windows insider program) and installed WSL and Windows Terminal which listed powershell, cmd.exe, Ubuntu bash and azure as profiles. I made the Ubuntu bash the default and this worked fine for a while. After a restart I was warned that the chosen default guid is not valid. Also, Ubuntu is no longer listed in the menu but the other three are. Here's the relevant snippet in settings.json: { "guid": "{2c4de342-38b7-51cf-b940-2309a097f518}", "hidden": false, "name": "Ubuntu", "source": "Windows.Terminal.Wsl" },
In another computer (Win 10 Pro 10.0.19041) I still have the same settings and they work. What does "source": "Windows.Terminal.Wsl" mean exactly? Does it point to some other config? How is it supposed to work?  |
| Is there a way to view web images from the terminal? Posted: 20 Mar 2021 10:01 AM PDT I want to be able to view the images inside a repository about wallpapers. Going through every image takes to long with the browser. I wonder if exists a program which I can accomplish this, view images from http  |
| Can ssh-copy-id be configured to save to a different authorized_keys file? Posted: 20 Mar 2021 07:30 AM PDT |
| Understanding the "process substitution" concept [duplicate] Posted: 20 Mar 2021 09:24 AM PDT I seek a simple explanation about the term "process substitution" aimed for general audience / non professional sysadmins, which do server environment maintenance for personal projects once in a while and not daily for customers or companies, if its okay to ask for it here. - What problem/s this concept was invented to solve
- What process is being substituted and with what (the name might mislead)?
- Is it also named "preserving stdin" and if so why? If the stdin device holds standard input which can be piped to another command, what is there to "preserve" further than that?
This might help me to understand the following command: bash <(wget -O - URL)
Note for newcomers: -O - tells wget to write data to stdout;  |
| How to move all the files with specific prefix of the directory? [duplicate] Posted: 20 Mar 2021 07:28 AM PDT I have a following directory structure (assume no two files have the same name): - Apple1
- Apple2
- Apple3
- Tomato
- Peach
And i would like to move one directory to the top directory all the *.jpg files inside the directories, which names start from Apple. As a result I expect the Apple directories to be empty and the images from Apple directories to be in the top. I have tried doing like mv "Apple*/*.jpg" ., or find . "Apple*/*.jpg" -exec mv -t . {} + as prescribed here How to integrate mv command after find command?. But this doesn't work. When executing mv i receive a following message: mv: cannot stat 'Apple*/*.jpg': No such file or directory
Seems like it has not found anything matching the pattern. And other option simply outputs nothing. Maybe the reason is, that in the case of subdirectories regular expression needs to be modified? I would be very grateful for help and suggestions.  |
| No space but `df`shows otherwise Posted: 20 Mar 2021 08:07 AM PDT UPDATE See answer. Found the problem.
I am downloading files that are quite large and place them under my /zhome/5f/4/122845/Desktop/cleaned_files. After some files, the system complains and won't allow me to download any further due to space. But looking at the below df, it seems like I have a lot left. I assume that I have to look under zhomeor what? but here it says only 16% used. I am new to linux and I am using a hpc through ssh. Type is nfs. Filesystem Size Used Avail Use% Mounted on devtmpfs 95G 0 95G 0% /dev tmpfs 95G 320K 95G 1% /dev/shm tmpfs 95G 155M 94G 1% /run tmpfs 95G 0 95G 0% /sys/fs/cgroup /dev/sda4 72G 5.6G 63G 9% / /dev/sda5 34G 11G 21G 35% /usr /dev/sda3 1022M 4.0K 1022M 1% /rescue /dev/sda2 2.0G 210M 1.6G 12% /boot /dev/sda7 604G 108M 574G 1% /tmp /dev/sda1 64M 9.9M 55M 16% /boot/efi beegfs_nodev 98T 82T 16T 84% /work1 beegfs_nodev 175T 112T 63T 65% /work2 beegfs_nodev 142T 102T 40T 72% /work3 10.66.1.16:/ifs/hpchome/zhome 865T 132T 704T 16% /zhome tmpfs 19G 0 19G 0% /run/user/196326 10.66.0.102:/zdata/appl/linux 20T 1.6T 18T 8% /appl 10.66.0.102:/zdata/lsf10prod 18T 25G 18T 1% /lsf tmpfs 19G 0 19G 0% /run/user/234837 tmpfs 19G 0 19G 0% /run/user/194863 tmpfs 19G 0 19G 0% /run/user/230594 tmpfs 19G 0 19G 0% /run/user/252995 tmpfs 19G 4.0K 19G 1% /run/user/1002 10.66.0.102:/zdata/sw 18T 220G 18T 2% /dtu/sw 10.66.0.98:/zdata/scratch 47T 18T 29T 38% /dtu/hpc.scratch tmpfs 19G 0 19G 0% /run/user/260498 tmpfs 19G 0 19G 0% /run/user/222845
Checking this: -bash-4.2$ df -ih /zhome/ Filesystem Inodes IUsed IFree IUse% Mounted on 10.66.1.16:/ifs/hpchome/zhome 109G 17G 92G 16% /zhome
Checking du after a cd command: -bash-4.2$ du -sh * 27G Desktop 32K Downloads 1.8M Maildir 24K public_html 318M sratoolkit.2.11.0-ubuntu64 127M sratoolkit.tar.gz
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| If a file has a command copied in it, how can I extract that command from the file onto the active command prompt in a terminal? Posted: 20 Mar 2021 10:11 AM PDT If I have a rather large complex command, I often just cat it into a file. This works well in an SSH terminal where I can use the client copy and paste. But if I am directly on the terminal I don't have that luxury. Cat'ing the file just outputs it once and then kicks back to the active prompt. I'm looking for something that will kick that file content onto the active prompt so I can scroll back and make minor tweaks and run it again.  |
| Add wireless TV like in windows Posted: 20 Mar 2021 07:53 AM PDT In windows you can do 'Add Wireless dock/device' and then simply cast to TV. Is there a way to do it in linux? I'm using Fedora. Windows:  I would then be able to see my desktop on my TV. https://windowsloop.com/how-to-connect-to-a-wireless-display-windows-10/ I've tried installing Gnome Network Display, it does find my TV but after trying to connect doesn't work. Thanks  |
| echo -e is not outputting correctly the result in a file when redirecting to a file in bash Posted: 20 Mar 2021 09:43 AM PDT Im running a script to get information of ports on a switch. I need to get the output results on a file instead of seeing the same command running. It reads from a file the ports fine. If I do not redirect to a file I get the right info; but when I redirect to a file I can see only the same command Im running on the switch. lldp-list.txt is a text file with the ports info (3 ports as an example). What could be wrong? I tried "tee" and "`" with no success. Im missing something On this line it outputs the results fine: - echo -e "show lldp neighbor-info $ports | inc Chassis-Desc"
Output: - Neighbor Chassis-Description : ArubaOS (MODEL: 205)
- Neighbor Chassis-Description : ArubaOS (MODEL: 225)
- Neighbor Chassis-Description : ArubaOS (MODEL: 325)
but when I redirect; I get the following result on the "output.txt" file echo -e "show lldp neighbor-info $ports | inc Chassis-Desc" >> output.txt show lldp neighbor-info 1/1/1 | inc Chassis-Desc show lldp neighbor-info 1/1/5 | inc Chassis-Desc show lldp neighbor-info 1/1/6 | inc Chassis-Desc
Here is the code: while IFS= read -r ports; do echo -e "show lldp neighbor-info $ports | inc Chassis-Desc" >> output.txt sleep 2 done < lldp-list.txt
Yes; I need de quotation marks; Its a command that I am executing from the switch via a telnet session. Without the " " the script returns an error. That's why I'm using echo -e ... so it sends that command line to the switch via telnet session from the bash script. As a workaround I use tee and the end of the telnet session line: telnet $MRV_HOST $MRV_PORT | tee output.txt
I had to do more parsing with the output file. But I still believe there should be a way to fix the issue Im seeing....  |
| I want to merge the output of top with the start time from ps Posted: 20 Mar 2021 09:00 AM PDT I have several services running and a bash script that displays their current state using top e.g. top -b -n1 -p `pgrep -f "proc1|proc2|proc3|proc4|proc5" | tr '\n' ',' | # replace the newlines in the pid list with commas sed 's/,$//g'` | # remove the trailing comma and submit to top grep -vx '.*sed' | # From the top output: remove the entry for sed sed 1,6d | # and remove the first 6 lines of top
produces PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 660 user1 20 0 5800588 658868 39384 S 0.0 4.3 0:47.72 proc1 718 user1 20 0 2089772 41068 25032 S 0.0 0.3 0:00.82 proc2 722 user1 20 0 1046316 34172 25000 S 0.0 0.2 0:02.85 proc3 725 user1 20 0 833716 23376 18404 S 0.0 0.2 0:00.21 proc4 729 user1 20 0 2369604 108084 34292 S 0.0 0.7 0:02.76 proc5
Next I would like to take each pid, pass it into 'ps -p <pid> -o start' and insert the output to the corresponding line to produce: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ STARTED COMMAND 660 user1 20 0 5800588 658868 39384 S 0.0 4.3 0:47.72 08:56:23 proc1 718 user1 20 0 2089772 41068 25032 S 0.0 0.3 0:00.82 08:56:24 proc2 722 user1 20 0 1046316 34172 25000 S 0.0 0.2 0:02.85 10:27:41 proc3 725 user1 20 0 833716 23376 18404 S 0.0 0.2 0:00.21 08:56:27 proc4 729 user1 20 0 2369604 108084 34292 S 0.0 0.7 0:02.76 08:56:29 proc5
I know I can extract the pid using awk but how do I merge/insert the output?  |
| How to start a service in a WSL-based Fedora? Posted: 20 Mar 2021 08:15 AM PDT I have a Fedora 33 under Windows Subsystem for Linux 2. I want to run sshd. For that I tried $ sudo systemctl start sshd
but I got the error message System has not been booted with systemd as init system (PID 1). Can't operate
Searching for this error message I have found https://linuxhandbook.com/system-has-not-been-booted-with-systemd/ which suggested to use the service command in this case. I tried but it said Redirecting to /bin/systemctl start sshd.service
so I got the same error. What can I do on my WSL2 based Fedora 33? UPDATE: I have installed Fedora onto WSL using a cloud image and the wsl command, described here: https://fedoramagazine.org/wsl-fedora-33/  |
| Moving from dual-boot (Windows10 / Pop_OS) to single (just Pop); Q's about my EFI setup: 2 EFI partitions? Posted: 20 Mar 2021 08:44 AM PDT Last July, as a complete Linux noob, I bought a refurbished Dell e7470 with Windows 10 pro pre-installed. I followed instructions in this video (cued to disk partition steps) to install Pop_OS 20.04 to dual-boot with Windows 10: Pop!_OS 19.10 - Setting up a Dual Boot with Windows 10. It went well. Now I am thinking about removing Windows, and I am looking at my disk partitions to see what can be removed. Here is screenshot from GNOME Disks while running Pop: 
I do not understand why the video had me create a new EFI partition (sda5) instead of using the ESP (sda1) that was pre-installed with Windows. I am wondering if that may cause problems, but, more importantly, whether I can use Disks to remove the Windows OS (sda3) as well as the ESP (sda1), recovery partition (sda4) and "Microsoft Reserved" (sda2). I do not want to do something wrong and end up with an un-bootable computer. In case it is helpful, here is the output from efibootmgr: steve@pop-os:~$ sudo efibootmgr BootCurrent: 0003 Timeout: 2 seconds BootOrder: 0003,0000,0001,0004 Boot0000* Windows Boot Manager Boot0001* UEFI: SK hynix SC311 SATA 512GB, Partition 1 Boot0002* Pop!_OS 20.04 LTS Boot0003* Pop!_OS 20.04 LTS Boot0004* Linux Firmware Updater
Boot0000 and Boot0001 seem to be the same -- Partition 1, as are Boot0002 and Boot0003 (partition 5).
I would like to know: - Is this 2-EFI-partition setup acceptable?
- How would I safely (and as completely as possible) remove Windows 10?
- Will my system be bootable without ESP, ie, will it use Partition 5 which says it mounts at
/boot/efi?  |
| keepalived no route to host, firewall issue? Posted: 20 Mar 2021 09:00 AM PDT I have a simple two server config of keepalived. The master/backup selection is working fine but I can't connect to the VIP from the backup server. When I try connecting, on the master I can see ARP requests from the backup server and responses from the master; on the backup server I only see the requests (i.e., I don't see the ARP responses from the master). Master keepalived.conf: vrrp_script haproxy-check { script "/usr/bin/pgrep python" interval 5 } vrrp_instance haproxy-vip { state MASTER priority 101 interface eth0 virtual_router_id 47 advert_int 3 unicast_src_ip 192.168.122.4 unicast_peer { 192.168.122.9 } virtual_ipaddress { 192.168.122.250 } track_script { haproxy-check weight 20 } }
Backup keepalived.conf: vrrp_script haproxy-check { script "/usr/bin/pgrep python" interval 5 } vrrp_instance haproxy-vip { state BACKUP priority 99 interface eth0 virtual_router_id 47 advert_int 3 unicast_src_ip 192.168.122.9 unicast_peer { 192.168.122.4 } virtual_ipaddress { 192.168.122.250 } track_script { haproxy-check weight 20 } }
ip addr on master: 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1458 qdisc pfifo_fast state UP group default qlen 1000 link/ether fa:16:3e:9e:e8:18 brd ff:ff:ff:ff:ff:ff inet 192.168.122.4/24 brd 192.168.122.255 scope global noprefixroute dynamic eth0 valid_lft 55567sec preferred_lft 55567sec inet 192.168.122.250/32 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::571a:df5f:930c:2b57/64 scope link noprefixroute valid_lft forever preferred_lft forever
And on backup: 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1458 qdisc pfifo_fast state UP group default qlen 1000 link/ether fa:16:3e:2e:59:3d brd ff:ff:ff:ff:ff:ff inet 192.168.122.9/24 brd 192.168.122.255 scope global noprefixroute dynamic eth0 valid_lft 79982sec preferred_lft 79982sec inet6 fe80::f816:3eff:fe2e:593d/64 scope link valid_lft forever preferred_lft forever
tcpdump from master: # tcpdump -nni eth0 arp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 11:44:06.299398 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:06.299435 ARP, Reply 192.168.122.250 is-at fa:16:3e:9e:e8:18, length 28 11:44:07.298939 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:07.298985 ARP, Reply 192.168.122.250 is-at fa:16:3e:9e:e8:18, length 28 11:44:08.300920 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:08.300954 ARP, Reply 192.168.122.250 is-at fa:16:3e:9e:e8:18, length 28 11:44:09.303039 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:09.303062 ARP, Reply 192.168.122.250 is-at fa:16:3e:9e:e8:18, length 28
And from the backup: # tcpdump -nni eth0 arp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 11:44:39.430367 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:40.431810 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:41.433847 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:42.435979 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28 11:44:43.437814 ARP, Request who-has 192.168.122.250 tell 192.168.122.9, length 28
I don't believe it's a firewall issue (iptables -L | grep -i arp doesn't show anything), is there a kernel setting that could be causing an issue? Any suggestions for debugging? OS is Centos 7, keepalived is 2.1.5.  |
| Pacemaker Virtual IP cannot be routed outside of its network Posted: 20 Mar 2021 10:03 AM PDT I have a server cluster consisted of following setup: 2 Virtual Servers with 2 NIC's. eth0 (private network 10.0.0.0/16) and eth1 (public network 77.1.2.0/24 with gateway as 77.1.2.1) For HA-01 VPS i have Private IP on eth0 set as 10.0.0.1 For HA-02 VPS i have Private IP set on eth0 as 10.0.0.2 Pacemaker/Corosync Cluster has been established between private IP addresses and Virtual IP (77.1.2.4) defined as clone Resource (IPAddr2) so it can float between two nodes. pcs resource create VirtualIP1 ocf:heartbeat:IPaddr2 ip="77.1.2.4" cidr_netmask="24" nic="eth1" clusterip_hash="sourceip-sourceport" op start interval="0s" timeout="60s" op monitor interval="1s" timeout="20s" op stop interval="0s" timeout="60s" clone interleave=true ordered=true
Problem is, i cannot reach that IP address from world. I noticed that there is a route missing, so i add the static route ip r add default via 77.1.2.1 dev eth1
But i still cannot ping google.com from those servers nor world can see them on that IP. I also tried adding IP addresses from same subnet on eth1 like this: HA-01 eth1: 77.1.2.2 HA-02 eth1: 77.1.2.3
Servers can be seen on those IPs by world but if i add VirtualIP resource i cannot reach them on Virtual IP address. I also tried adding a source ip in routing table ip r add default via 77.1.2.1 src 77.1.2.4
to no avail. I don't know what am i supposed to do to get this VirtualIP working. I can reach 77.1.2.4 (Virtual IP Address) from other servers on that network, but not outside that network. Firewall is established and high availability ports are passed via command firewall-cmd --add-service="high availability"; firewall-cmd --add-service="high availability" --permanent
Is there anything here that i am missing? If i add that address (77.1.2.4 - Virtual IP) alone on the interface of only one of those servers, it will work.... So is there an issue with ARP table perhaps or maybe router blocking some traffic?  |
| can't install libcups2-dev Posted: 20 Mar 2021 09:02 AM PDT uname inf: Linux N551JB 4.11.0-999-lowlatency #201704042201 SMP PREEMPT I wanted to install drivers for my hp printer, but I got problem with libcups2-dev package. That's what installing program said: command: sh hplip-3.17.4.run error: Package install command failed with error code 100 I tried to install it from Synaptic Package Manager, but it refused and gave an error: Depends: libcups2 (=2.1.3-4) but 2.1.3-4ubuntu0.2 is to be installed Do anyone know how to solve this problem? Output from command: apt-cache policy libcups2-dev libcups2 libcups2-dev: Installed: (none) Candidate: 2.1.3-4 Version table: 2.1.3-4 500 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages libcups2: Installed: 2.1.3-4ubuntu0.2 Candidate: 2.1.3-4ubuntu0.2 Version table: *** 2.1.3-4ubuntu0.2 100 100 /var/lib/dpkg/status 2.1.3-4 500 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
apt-get install libcups2 Reading package lists... Done Building dependency tree Reading state information... Done libcups2 is already the newest version (2.1.3-4ubuntu0.2). The following packages were automatically installed and are no longer required: account-plugin-tools accountsservice-ubuntu-schemas android-tools-adb android-tools-fastboot antlr3 apparmor-easyprof-ubuntu autopilot-qt4 autopilot-qt5 bnd click click-apparmor click-dev click-doc click-reviewers-tools cmake-extras devscripts fbset gdb-multiarch gir1.2-click-0.4 gir1.2-gee-0.8 gir1.2-ubuntu-app-launch-2 gsettings-ubuntu-schemas i965-va-driver:i386 java-wrappers javahelp2 junit4-doc libantlr3-runtime-java libatinject-jsr330-api-java libatk-bridge2.0-0:i386 libatspi2.0-0:i386 libautopilot-qt libbeansbinding-java libbindex-java libboost-dev libboost-filesystem1.58.0:i386 libboost-python1.58.0 libboost-regex1.58.0 libboost-serialization1.58.0 libboost-system1.58.0:i386 libboost1.58-dev libbotan-1.10-1 libbsh-java libbytelist-java libcapnp-0.5.3 libcdi-api-java libclick-0.4-0 libcolord2:i386 libcommons-io-java libcommons-lang-java libdbus-cpp5 libeclipselink-java libegl1-mesa:i386 libepoxy0:i386 libfelix-framework-java libfelix-main-java libfreemarker-java libgbm1:i386 libgeonames0 libgeronimo-interceptor-3.0-spec-java libgeronimo-j2ee-connector-1.5-spec-java libgeronimo-jms-1.1-spec-java libgeronimo-validation-1.0-spec-java libgflags2v5 libgoogle-glog0v5 libgsettings-qt1 libgtk-3-0:i386 libhtml5parser-java libhttpclient-java libhttpcore-java libhud2 libicu-dev libicu4j-4.4-java libini4j-java libjansson4 libjavaewah-java libjcodings-java libjcommander-java libjemmy2-java libjgit-java libjna-java libjna-jni libjna-platform-java libjnlp-servlet-java libjoda-time-java libjpa-2.1-spec-java libjs-sphinxdoc libjsch-agent-proxy-java libjson-glib-1.0-0:i386 libjson-simple-java libjsr311-api-java libjvyamlb-java libjzlib-java libkeybinder0 libleveldb1v5 liblttng-ust-ctl2 liblttng-ust0 liblucene3-java libmail-java libmirclient9:i386 libmircommon5:i386 libmirprotobuf3:i386 libmysql-java libnb-absolutelayout-java libnb-apisupport3-java libnb-ide14-java libnb-java5-java libnb-javaparser-java libnb-org-openide-modules-java libnb-org-openide-util-java libnb-org-openide-util-lookup-java libnb-platform-devel-java libnb-platform18-java libnet-cpp2 libonline-accounts-client1 libpay2 libpostgresql-jdbc-java libprocess-cpp3 libproperties-cpp-dev libprotobuf-lite9v5:i386 libqbscore1 libqbsqtprofilesetup1 libqdjango-db0 libqgsttools-p1 libqmenumodel0 libqt5designercomponents5 libqt5multimedia5-plugins libqt5multimediaquick-p5 libqt5multimediawidgets5 libqt5organizer5 libqt5xmlpatterns5 librest-0.7-0:i386 libscope-harness3 libsequence-library-java libservlet2.5-java libsimple-validation-java libslf4j-java libsqljet-java libstringtemplate4-java libsvn-java libsvnclientadapter-java libsvnkit-java libswing-layout-java libswingx-java libthumbnailer-qt1.0 libtrilead-ssh2-java libtrust-store2 libubuntu-app-launch2 libubuntu-location-service3 libubuntu-platform-hardware-api3 libubuntugestures5 libubuntuoneauth-2.0-0 libubuntutoolkit5 libunity-action-qt1 libunity-api-dev libunity-api0 libunity-scopes-dev libunity-scopes1.0 liburcu4 liburl-dispatcher1 libusermetricsoutput1 libva-drm1:i386 libva-x11-1:i386 libva1:i386 libvdpau1 libvdpau1:i386 libwayland-client0:i386 libwayland-cursor0:i386 libwayland-egl1-mesa:i386 libwayland-server0:i386 libwine-development libws-commons-util-java libxcb-xfixes0:i386 libxerces2-java libxkbcommon0:i386 libxml-commons-external-java libxnvctrl0 libxpathselect1.4v5 libzmqpp3 lynx-common mesa-vdpau-drivers:i386 ocl-icd-libopencl1 ocl-icd-libopencl1:i386 pay-service pay-ui phablet-tools python-autopilot python-contextlib2 python-decorator python-evdev python-extras python-fixtures python-funcsigs python-junitxml python-keybinder python-linecache2 python-mimeparse python-mock python-pbr python-psutil python-pyexiv2 python-subunit python-testscenarios python-testtools python-traceback2 python-unittest2 python3-apparmor-click python3-autopilot python3-click-package python3-dateutil python3-decorator python3-extras python3-fixtures python3-junitxml python3-linecache2 python3-magic python3-mimeparse python3-pbr python3-psutil python3-scope-harness python3-simplejson python3-subunit python3-testscenarios python3-testtools python3-traceback2 python3-tz python3-unittest2 qml-module-qt-labs-folderlistmodel qml-module-qt-labs-settings qml-module-qtfeedback qml-module-qtgraphicaleffects qml-module-qtmultimedia qml-module-qtquick-xmllistmodel qml-module-qttest qml-module-ubuntu-components qml-module-ubuntu-layouts qml-module-ubuntu-onlineaccounts qml-module-ubuntu-onlineaccounts-client qml-module-ubuntu-performancemetrics qml-module-ubuntu-test qml-module-ubuntu-thumbnailer0.1 qml-module-ubuntu-web qtcreator-data qtcreator-plugin-ubuntu-common qtdeclarative5-accounts-plugin qtdeclarative5-controls-plugin qtdeclarative5-gsettings1.0 qtdeclarative5-online-accounts-client0.1 qtdeclarative5-qtquick2-plugin qtdeclarative5-ubuntu-settings-components qtdeclarative5-ubuntu-thumbnailer0.1 qtdeclarative5-ubuntu-ui-toolkit-plugin qtdeclarative5-ubuntu-web-plugin qtdeclarative5-unity-action-plugin qtdeclarative5-unity-notifications-plugin qttestability-autopilot schroot schroot-common screen-resolution-extra sqlite3 suru-icon-theme testng thumbnailer-service ubuntu-mobile-icons ubuntu-push-client ubuntu-sdk-qmake-extras ubuntu-ui-toolkit-doc ubuntu-ui-toolkit-examples ubuntu-ui-toolkit-theme ubuntu-ui-toolkit-tools ubuntuone-client-data ubuntuone-credentials-common unity-asset-pool unity-plugin-scopes unity-schemas unity-scope-tool unity-webapps-qml unity8-common unity8-fake-env unity8-private url-dispatcher usermetricsservice va-driver-all:i386 vdpau-driver-all:i386 vdpau-va-driver:i386 webapp-container webbrowser-app Use 'sudo apt autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded.
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| Autostarting .desktop application at startup not working Posted: 20 Mar 2021 09:46 AM PDT I have read that adding a .desktop file to /etc/xdg/autostart can start an application at startup. I did the same to execute my application. But nothing happens on startup. Following is the content of my .desktop file: [Desktop Entry] Type=Application Encoding=UTF-8 Version=1.0 Name=screenshot Exec=/home/anaswara/eclipse_agent/bin/Screenshot X-GNOME-Autostart-enabled=true X-KDE-autostart-after=panel
Can anybody tell what is going wrong(Ubunu 14.04)  |
| pulse_output failed to play: suspended Posted: 20 Mar 2021 08:01 AM PDT I have mpd running as a system service and as user mpd. Since mpd is a system service and pulse audio is session-based, I have to stream music from mpd to the currently active pulse session daemon. This is done using the module-native-protocol-tcp module configured with auth-anonymous=1 auth-cookie-enabled=0 listen=0.0.0.0 (loose, I know, but for testing purposes) The output in mpd.conf looks like this: audio_output { type "pulse" name "My (loopback) Pulse Output" server "localhost" }
Now when I run a song in mpd it complains: pulse_output: "My (loopback) Pulse Output" [pulse] failed to play: suspended output: Failed to open audio output
What is wrong here? Is this a bug? What I tried : Running as my user (systemd) Running as my user (systemd) and set the user in mpd.conf Running as root and set the user in mpd.conf Setting the exact sink name  |
| How to control equalizer within command line? Posted: 20 Mar 2021 07:45 AM PDT |
| How to restrict an SSH user to only allow SSH-tunneling? Posted: 20 Mar 2021 08:34 AM PDT How can I restrict a user on the SSH server to allow them only the privileges for SSH TUNNELING? i.e. So they cannot run commands even if they log in via SSH. My Linux servers are Ubuntu 11.04 and OpenWrt.  |
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