Recent Questions - Server Fault |
- Windows AD OU Block (Read/List) Objects from other OU
- ESXi esxcli Error: Unknown command or namespace vm process kill –t=soft –w=67909
- GITLAB AZURE PORTAL DEPLOYMENT
- Overlapping certificates
- how to change user privileges from 'Y' to 'N' im mysql Server?
- What happens if you make a mistake when you change the authoritative nameservers for a domain?
- Unable to open PHP script files, even though I own them and have permissions
- EC2 instance doesn't show up in AWS Systems Manager
- Windows OpenVPN client 3.2.3 can only ping using FQDN. While OpenVPN client 2.5.1 can ping by both hostname and by FQDN
- enough free pages but high number of major page faults and page reclaims
- SSH hanging after sending env LANG, only on one computer on network
- Nameserver invalid warning
- Debian: LVM cache pool slows down WD Red HDD to 12 MB/s (no RAID)
- How to install snapd on Oracle Linux 7.9
- How do production web applications make backups? [closed]
- How to create an ansible-vault file from a task
- How do I Pipe in Skip or Overwrite All when running the following bat?
- zabbix agent vs agent2
- NFS server daemon fails to start at boot
- rewrite URL in htaccess and remove everything but parameter
- Error using mod_jk in httpd: undefined symbol: ap_get_server_version
- MySQL [ERROR] Can't start server: can't create PID file: No such fie or directory
- Apache: Request exceeded the limit of 10 internal redirects due to probable configuration error - WooCommerce
- Openvas ldap authentication configuration
- How to configure nDPI for iptables
- mod_security2.so: undefined symbol: ap_unixd_set_gl
- Samba share, local group, AD users
- svn: Too many arguments to import command
- Automating ssh-copy-id
- Exchange 2010 add mailbox server to DAG error
| Windows AD OU Block (Read/List) Objects from other OU Posted: 17 Apr 2021 07:38 PM PDT I have a Root OU that has an OU called "Clients" and under I have multiple OU's and the client's PC's/User Accounts in sub-OU's. The issue is, my clients can see other groups' user accounts/computers and need to prevent this as if they're on completely different machines and not under the same Domain. I am guessing I have to go make Deny rules for every single OU Group about every Client OU Group? Currently, they can search AD for users and see other clients (not within a said company). Any thoughts on how to do it and potentially with Powershell or just in general?  |
| ESXi esxcli Error: Unknown command or namespace vm process kill –t=soft –w=67909 Posted: 17 Apr 2021 07:32 PM PDT I'm running ESXi 6.5 embedded host client. When i ssh into the system I can run But if i run To confirm i'm running the correct command, i ran Can you see anything i'm doing wrong that might be preventing this command from working? I realize there's  |
| GITLAB AZURE PORTAL DEPLOYMENT Posted: 17 Apr 2021 07:25 PM PDT Before the update on Microsoft Azure deployment Center i can connect my gitlab repository and the portal successfully fetched the commits. But after the update i cannot deploy my gitlab repository to the Azure portal the same way. Does anyone know how to fix this? Image for reference. Thanks!  |
| Posted: 17 Apr 2021 06:58 PM PDT I came across two hosts which have overlapping certificates: My problem is with caching. In my own proxy I cache the first certificate for both I can easily add a sort of "specificity rule", since  |
| how to change user privileges from 'Y' to 'N' im mysql Server? Posted: 17 Apr 2021 06:56 PM PDT i want to change a privilege to my glpiuser from 'N' to 'Y' in mysql server what is the command to do this task her's the image that display my users i'm using Ubuntu 20.04.1  |
| What happens if you make a mistake when you change the authoritative nameservers for a domain? Posted: 17 Apr 2021 10:27 PM PDT Say for example during a DNS migration to cloudflare, rather than transfering to "fred.ns.cloudflare.com" you typo'd "ferd.ns.cloudflare.com" or something similar for NS1, and the same kind of thing for NS2. You realise this after the change has propagated, so you can no longer edit DNS on your original DNS host, but cloudflare never receives the domains. Is there a way to recover from that kind of situation / would the transfer fail in the first place or something similar, or would you effectively just lose control of your DNS? -- Not something that's actually happened to me, but something of a potential nightmare scenario that I can't find any information on, which makes me think I may be overly worried about nothing?  |
| Unable to open PHP script files, even though I own them and have permissions Posted: 17 Apr 2021 05:04 PM PDT I'm using RHEL 8, and I have run into a crazy problem. My user account is unable to open PHP files. If I have a file, owned by my user, and readable by my user, and I add If I look at the file using It doesn't appear to be an SELinux problem, since It's possible this is happening to all script files, but on this server, I only need to use PHP scripts. Help!  |
| EC2 instance doesn't show up in AWS Systems Manager Posted: 17 Apr 2021 04:26 PM PDT I am trying to create an EC2 instance (Amazon Linux, so I shouldn't have to configure the SSM agent as it should be autoconfigured) in a private subnet, and want to be able to SSH into it. According to this post I have to use AWS Systems Manager for this. I've done quite a bit with codestar/beanstalk before, but now simply want to be able to create and delete everything via the AWS CLI manually for learning purposes. Here are the commands I'm able to run fine (the ec2 instance is created succesfully with my role) I took parts of these commands from this post. My json file for ec2-role: Unfortunately this instance isn't visible in the SSM (Systems Manager): I have been following the main documentation on SSM and from what I understand from the page below is that all you would need is the AmazonSSMManagedInstanceCore policy: https://docs.aws.amazon.com/systems-manager/latest/userguide/session-manager-getting-started-instance-profile.html The web console hasn't been any help so far, according to this page it treats roles and instance-profiles as the same thing. What am I missing here to be able to use the aws ssm command to start an ssh session?  |
| Posted: 17 Apr 2021 04:01 PM PDT On my personal computer, I can only ping hostnames using the FQDN when using version 3.2.3 and version 2.7.1. Yet I am able to ping by hostname and by FQDN when using version 2.5.1. However, one of my field co-worker's computer can ping hostnames without using the FQDN when using version 3.2.3. Sadly, they can't ping hostnames without using the FQDN when using version 2.5.1. I didn't try version 2.7.1, since version 3.2.3 worked.
Both of these computers are running Windows 10 and fully updated.  |
| enough free pages but high number of major page faults and page reclaims Posted: 17 Apr 2021 03:56 PM PDT We find that for some servers io disk read is very high. We also notice that there are many major page faults on those servers. But we checked the /proc/zoneinfo, there are enough free pages. Here is the content of /proc/zoneinfo: We also use "perf" to monitor the event of "mm_filemap_delete_from_page_cache". Here is the result of perf: It seems that os is carrying on page reclaim. But I don't know since there are enough free pages, why could page reclaim ocurr?  |
| SSH hanging after sending env LANG, only on one computer on network Posted: 17 Apr 2021 03:41 PM PDT I'm unable to SSH into a server from one machine on my network. I can successfully SSH using the exact same port, address, user, and ssh key from other machines on my network. When I try to connect, half of my MOTD is printed out and then the connection hangs. I figured it might be an issue with my terminal reading the MOTD, but I've tried several different terminals with the WSL bash shell and the problem is consistent. What could the issue be, or what would be the next step to diagnosing this? The server is running Ubuntu 20.04.2 LTS and OpenSSH 8.2p1 Desired
Actual
Successful OutputFailure Output |
| Posted: 17 Apr 2021 02:54 PM PDT I made my own nameserver configuration, but as you can see in the picture and the link, I am getting a ( Hosting provider nameserver IPs: My dedicated IP: My DNS Records: Domain Provider DNS Settings: Where am I making a mistake? Do I enter the dedicated IP in the fields? I could not understand! Why am I getting this error? How should it be properly configured?  |
| Debian: LVM cache pool slows down WD Red HDD to 12 MB/s (no RAID) Posted: 17 Apr 2021 03:54 PM PDT I've a brand new WD RED 6 TB HDD (WD50EFAX) in my HP Microserver Gen 8 running Debian 10. I used LVM caching for years, to improve reading performance. Today, I investigated a performance bottleneck when copying large files over SMB. It resulted in a dd test Disabling the LVM caching of the WD RED, this value was increased to 120 MB/s which is usual for such HDDs, I guess. The bottleneck occurs after a few hundred MB have been written. My cache size is 10G as you can see below. The HDDs own write cache is disabled So, what could cause the LVM cache to slow down write performance? The cache type is write-through so it should work as pure read cache. Does anyone have an idea what could cause this? With my old HDD (2 TB WD red) the performance was quite good. I used thie tutorial (German, sorry) https://www.thomas-krenn.com/de/wiki/LVM_Caching_mit_SSDs_einrichten P.S. I know my disk uses SMR but I don't use a RAID So I don't think this "bug" could affect me.  |
| How to install snapd on Oracle Linux 7.9 Posted: 17 Apr 2021 02:47 PM PDT I am trying to install snapd on Oracle Linux Server 7.9 On many sites I have seen that it has been advised to install spand as follows But I am not able to install this repo on Oracle Linux (No package epel-release available.) Following repos are available in the system Can someone tell me how to install snapd on Oracle Linux 7.9?  |
| How do production web applications make backups? [closed] Posted: 17 Apr 2021 09:26 PM PDT So, I'm almost finished building my first major production web app, and am wondering how to manage the backup protocol. Cold backups via my hosting control panel seem ideal - but daily downtime sounds awful for UX. Hot backups seem pointless as they cannot be trusted to not be corrupt. My server runs Debian. Is there a way to SSH in and clone the filesystem on my local machine, before encrypting with Veracrypt, before posting it to the moon, as an off-planet backup? (Lol.) I suppose I don't need to backup the entire fs on a daily basis, but definitely Mongodb. What's the easiest way to automate a mongodb backup? Thanks so much for reading :)  |
| How to create an ansible-vault file from a task Posted: 17 Apr 2021 02:52 PM PDT I need to create an ansible-vault file to store credentials in a task in a playbook. This file would be used by another playbook. Is there an internal ansible method/module to accomplish this? I would prefer not to do it invoking shell/command. Any help would be highly appreciated.  |
| How do I Pipe in Skip or Overwrite All when running the following bat? Posted: 17 Apr 2021 02:54 PM PDT How would I Pipe in Skip or Overwrite All (Always) to the following code? NB! the code recursively extracts archives with folders and sub-archives. See below an example of the prompt:
 |
| Posted: 17 Apr 2021 10:17 PM PDT I am working on deploying Zabbix in our organization and comparing zabbix agent vs agent2 I found following link which is useful, https://www.zabbix.com/documentation...ent_comparison I just have a couple of questions:
Also, is there anything else I should know when using agent2? e.g. any limitations, gotchas? Thank you J  |
| NFS server daemon fails to start at boot Posted: 17 Apr 2021 04:47 PM PDT I´m trying to export an external disk, so, I configured my nfs-server service to wait for disk1 to mount, however it fails. This is the situation after boot: If I just restart the service it just works smoothly I configured the service to "Requires" and "After" disk1 mounts, but it didn´t work: Extra info requested:  |
| rewrite URL in htaccess and remove everything but parameter Posted: 17 Apr 2021 04:47 PM PDT Is it possible to turn this URL: Into this URL: When I try I just keep getting 404 or 500 errors and it's frustrating. Here's a few thing's I've tried. If it's not possible then please could you tell me why it's not. I'm rather new to mod_rewrite and want to learn.  |
| Error using mod_jk in httpd: undefined symbol: ap_get_server_version Posted: 17 Apr 2021 06:52 PM PDT We just recently installed a new RHEL7 server. Inside of this server, we have a bunch of vhosts, and inside the vhosts there is a couple of lines that looks like this - So in order to handle this, we use mod_jk inside of our apache configuration. However, when I try to start apache, I get the following error - The mod_jk.conf file is inside of /etc/httpd/conf.d, and it looks like this - Any ideas as to what that error means, and how I can get httpd to start? Thanks.  |
| MySQL [ERROR] Can't start server: can't create PID file: No such fie or directory Posted: 17 Apr 2021 03:44 PM PDT I'm having trouble starting Output of Same way output of When I tried I went through For which I looked online and tried to fix issue which said to be of the permission, So I created to fix this error which But still the problem persist. Can anyone help me out with this! Thanks  |
| Posted: 17 Apr 2021 03:44 PM PDT I have a woocommerce site. I have a recursive error in the Apache error.log: I have seen the error happens when a javascript fires up a window with the detailed images (referer ...style.css) in the single product page. The google-chrome console registers these errors: I have this in the .htaccess file, related to chrome errors. However, the error appear in more places of the site (I haven't identified them yet). The reason to investigate this is the site doesn't load properly CSS in some product pages when they're cached. I use wp-super-cache and autoptimize plugins. Do you have an idea to help me? Thanks!  |
| Openvas ldap authentication configuration Posted: 17 Apr 2021 02:43 PM PDT I'm stuck in the process of Openvas ldap authentication configuration. I use the following openvas components version from upstream: (both installed from self made ppa repo openvas8) Distro - Ubuntu 14.04.2 LTS I found example.auth.conf in libraries sources tarball. With the help of strace i found the directory where openvasmd expected to find it's auth config: Due to empty Then i raised the logging level 127=>128 for openvasmd (also runnig in verbose mode Following the information a found in mailing list archives (example yeah it's rather outdated =\) i added to the config: I also commented And also the obvious result of login: ... - setting my creds, by the way password in log file was in plain text format First of all, i thought it was misconfiguration issue while compiling the libraries (without ldap support flag). But both libraries and openvas manager are linked with ldap libs (i also added ldap dev libs to the debian/control file as build dependencies for packages): And i found no references of  |
| How to configure nDPI for iptables Posted: 17 Apr 2021 08:54 PM PDT I am new to nDPI, I have installed nDPI but when I add rules like; iptables -I OUTPUT -m ndpi --http -j REJECT it shows error iptables v1.4.7: Couldn't load match `ndpi':/lib64/xtables/libipt_ndpi.so: cannot open shared object file: No such file or directory Try `iptables -h' or 'iptables --help' for more information. Plz, if anyone can tell me how to configure iptables for nDPI. I am using centOS 6.5 Thanks;  |
| mod_security2.so: undefined symbol: ap_unixd_set_gl Posted: 17 Apr 2021 06:52 PM PDT my httpd file: any ideas? google has nothing. I followed these guidelines: https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual#wiki-SVN_Access Apache is 2.2.15 PHP is 5.3.3 I installed apache/php via yum  |
| Samba share, local group, AD users Posted: 17 Apr 2021 07:49 PM PDT I have a Debian 6 system running Samba 3.5.6 that has been successfully set up to authenticate against an Active Directory domain (via SSH that is). I have a directory (let's call it /foo) that I want to be editable by both local users and AD users. I have created a local group "fooedit" and added both the local users and domain users to it. I have set up the neccessary ACLs on /foo to allow fooedit users to edit the files and tested it to be functioning via SSH for both the local and AD users. I would like the AD users to be able to edit via share as well, but can't seem to get the right configuration. They can see the share, but it prompts them for credentials when trying to access it and credentials don't work. Is this possible and if so what do I need to do it? I don't want to do this with an AD group if possible because I may need to do this on many machines with different users on each machine, so a local group would be cleaner. smb.conf: getfacl /foo: /etc/group: ... and go!  |
| svn: Too many arguments to import command Posted: 17 Apr 2021 07:49 PM PDT Having a problem with the --message flag to the svn import command. On some servers it works, but on others it gets confused if the message contains spaces, even if you single or double quote the message string thus: When it fails, I get the error: If I limit the message to one without any spaces, it succeeds everytime. Clearly the problem is with the command failing to recognise a quoted string, but why? Differences between whether it succeeds or not seems to be down to the particular OS/Shell combination I'm using. The command works on SUSE 10.3 with Ksh Version M 93s+ 2008-01-31, but fails on RHEL 5.6 with Ksh Version AJM 93t+ 2010-02-02. Or perhaps that's a red herring, and the real problem is something else differing between environments?  |
| Posted: 17 Apr 2021 02:50 PM PDT I have some arbitrary number of servers with the same user/pass combination. I want to write a script (that I call once) so that
is called for each server. Since they all have the same user/pass this should be easy but How can I write a script that automatically fills in the password field when  |
| Exchange 2010 add mailbox server to DAG error Posted: 17 Apr 2021 08:54 PM PDT i'm having some problems when adding a second mailbox server to my DAG in Exchange 2010. The test setup goes like this: 1x windows server 2008 (DC/DNS) 2x windows server 2008 (Exchange 2010) I have made sure all services are up and running and that the "Exchange Trusted Subsystem" account is set as a local admin. When i create a DAG i can add the first mailbox server (A) without any problems, but when i go to add the second (B) it gives me an error saying "Unable to contact the Cluster service on 1 other members (member) of the Database availability group. It does the same if i add (B) first and then try to add (A). Here is a part of the log file: [2010-04-05T15:00:27] GetRemoteCluster() for the mailbox server failed with exception = An Active Manager operation failed. Error: An error occurred while attempting a cluster operation. Error: Cluster API '"OpenCluster(EXCHANGE20102.area51.com) failed with 0x6d9. Error: There are no more endpoints available from the endpoint mapper"' failed.. This is OK. [2010-04-05T15:00:27] Ignoring previous error, as it is acceptable if the cluster does not exist yet. [2010-04-05T15:00:27] DumpClusterTopology: Opening remote cluster AREA51DAG01. [2010-04-05T15:00:27] DumpClusterTopology: Failed opening with Microsoft.Exchange.Cluster.Replay.AmClusterApiException: An Active Manager operation failed. Error: An error occurred while attempting a cluster operation. Error: Cluster API '"OpenCluster(AREA51DAG01.area51.com) failed with 0x5. Error: Access is denied"' failed. ---> System.ComponentModel.Win32Exception: Access is denied --- End of inner exception stack trace --- Any help would be really appreciated, thanks.  |
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