Discuss November 2021

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51 participants
31 discussions

NFS Share fails to mount at boot time
by Felix Natter 15 Jan '22

15 Jan '22

hello fellow CentOS Users, on Scientific Linux 7 (_very_ similar to CentOS7), I get this when trying to mount NFS Shares (exported from Synology NAS) automatically at boot time: [root@HOST ~]# journalctl -b 0 | grep NAS[20] Jul 01 13:32:09 HOST systemd[1]: Mounting /mnt/NAS0... Jul 01 13:32:09 HOST systemd[1]: Mounting /mnt/NAS2... Jul 01 13:32:09 HOST systemd[1]: mnt-NAS0.mount mount process exited, code=exited status=32 Jul 01 13:32:09 HOST systemd[1]: Failed to mount /mnt/NAS0. Jul 01 13:32:09 HOST systemd[1]: Unit mnt-NAS0.mount entered failed state. Jul 01 13:32:09 HOST systemd[1]: mnt-NAS2.mount mount process exited, code=exited status=32 Jul 01 13:32:09 HOST systemd[1]: Failed to mount /mnt/NAS2. Jul 01 13:32:09 HOST systemd[1]: Unit mnt-NAS2.mount entered failed state. I read that enabling NetworkManager-wait-online.service can mitigate that, but it's already enabled: [root@HOST ~]# systemctl list-unit-files|grep wait chrony-wait.service disabled NetworkManager-wait-online.service enabled plymouth-quit-wait.service disabled /mnt/NAS2 is defined in /etc/fstab (/mnt/NAS0 is mounted analogously): NAS2HOST:/volume1/export/ /mnt/NAS2 nfs rw,vers=3,soft,bg,intr 0 0 This does not always occur, and it seems to be a race condition, because it did not occur a few months ago, before we moved offices (when only the networking changed slightly). Of course, once the computer is booted, I can always mount the shares without problems. Does someone have an idea? Many Thanks and Best Regards, -- Felix Natter

3 4

Delete local user/group but not LDAP one
by Felix Natter 30 Dec '21

30 Dec '21

Dear fellow linux users, I have a computer with a local user X that shadows an LDAP user of the same name (and group). I know I can use: userdel X groupdel X but how do I make sure that the LDAP is not changed, and only the local user/group is deleted? This is very critical. Many Thanks and Best Regards, -- Felix Natter

5 9

Microsoft Teams on CentOS 7. Does the latest version work?
by Toralf Lund 03 Dec '21

03 Dec '21

Does anyone else run Microsoft Teams on CentOS 7? I've used it for a while now, and it's generally worked reasonably well. However, after upgrading to the latest version from the Microsoft repos, it doesn't start up properly. Processes start and remain active until I give up and kill them, but I can't see a window or a tray icon or anything. Has anyone else seen this? Is there anything I can do to make the GUI appear? This is not a big deal as everything just works fine if I revert to the previous release, but it would be interesting to know if this is a general problem with the software, or I have some weird issue with my system. The release that doesn't work is 1.4.00.13653. The one that does is 1.4.00.7556. - Toralf

14 31

Running Centos 8 Stream: Do I need to remove any of the repos?
by Jay Hart 03 Dec '21

03 Dec '21

Here is a list of the repos I have. As I am now running Centos 8 Stream, should I remove any of the repos below to avoid package versioning issues? # ls -al /etc/yum.repos.d/ total 108 drwxr-xr-x. 2 root root 4096 Nov 15 16:18 . drwxr-xr-x. 152 root root 12288 Nov 28 10:17 .. -rw-r--r--. 1 root root 790 Jun 7 2020 CentOS-AppStream.repo.rpmsave -rw-r--r--. 1 root root 771 Jun 7 2020 CentOS-Base.repo.rpmsave -rw-r--r--. 1 root root 792 Jun 7 2020 CentOS-PowerTools.repo.rpmsave -rw-r--r--. 1 root root 713 Sep 14 21:11 CentOS-Stream-AppStream.repo -rw-r--r--. 1 root root 698 Sep 14 21:11 CentOS-Stream-BaseOS.repo -rw-r--r--. 1 root root 316 Sep 14 21:11 CentOS-Stream-Debuginfo.repo -rw-r--r--. 1 root root 698 Sep 14 21:11 CentOS-Stream-Extras.repo -rw-r--r--. 1 root root 734 Sep 14 21:11 CentOS-Stream-HighAvailability.repo -rw-r--r--. 1 root root 696 Sep 14 21:11 CentOS-Stream-Media.repo -rw-r--r--. 1 root root 718 Sep 14 21:11 CentOS-Stream-PowerTools.repo -rw-r--r--. 1 root root 690 Sep 14 21:11 CentOS-Stream-RealTime.repo -rw-r--r--. 1 root root 748 Sep 14 21:11 CentOS-Stream-ResilientStorage.repo -rw-r--r--. 1 root root 1568 Sep 14 21:11 CentOS-Stream-Sources.repo -rw-r--r--. 1 root root 1485 Sep 4 13:28 epel-modular.repo -rw-r--r--. 1 root root 1564 Sep 4 13:28 epel-playground.repo -rw-r--r--. 1 root root 1422 Sep 4 13:28 epel.repo -rw-r--r--. 1 root root 1584 Sep 4 13:28 epel-testing-modular.repo -rw-r--r--. 1 root root 1521 Sep 4 13:28 epel-testing.repo -rw-r--r--. 1 root root 358 Nov 15 16:18 redhat.repo -rw-r--r--. 1 root root 935 Jul 5 10:00 remi-modular.repo -rw-r--r--. 1 root root 1448 Jul 5 10:00 remi.repo -rw-r--r--. 1 root root 810 Jul 5 10:00 remi-safe.repo Thanks, Jay

5 8

mounting XFS RAID-1 disk partition that needs repair.
by Fred 24 Nov '21

24 Nov '21

I'm attempting to extract data from a HD that has a bunch of linux-raid partitions, including one large one with data I need to save off the disk. I actually have two drives like that (both not from the same RAID pair), and one of them I was successful in creating a MD device so I could mount it RO and copy off a ton of data. the second one fails to mount, saying the XFS filesystem is corrupted. Attempting to run XFS_repair I get a message that the filesystem is XFS-1 and I need an older version of XFS tools to do it. I'm running Centos-7 with whatever version of XFS tools comes with it, according to 'yum list installed' it appears to be xfsprogs 4.5.0-22.el7. I don't particularly want to install another, older, version of xfsprogs on this system. can anyone suggest any other way to gain access to this disk partition? Thanks in advance! Fred

3 6

cluster ssh edit file with vi slow
by Ralf Prengel 24 Nov '21

24 Nov '21

Hallo, has anyone a hint: I have 35 centos systems configured to be managed using clusterssh. Everythings works fine until I try to edit a file using vi on these 35 Systems. The connections to all targets becomes slow and unusable for minutes until the change in the file is done. Calling commandos like ls -l is reacts fast. DNS in the network isn't fast but working. Has anyone a hint for me? Thanks Ralf

2 1

CentOS8 Docker: "repomd.xml parser error: Parse error at line" after enabling /etc/yum.repos.d/CentOS-Linux-ContinuousRelease.repo
by John Pfuntner -X (jpfuntne - EASI LLC at Cisco) 23 Nov '21

23 Nov '21

I'm having trouble with dnf repos in a centos:8 Docker container after I enable the continuous release repo: 1. docker pull centos:8 2. docker run -it centos:8 bash -i 3. From Docker container: * dnf install -y 'dnf-command(config-manager)' && dnf config-manager --enable cr * dnf update The update results in: Failed to set locale, defaulting to C.UTF-8 CentOS Linux 8 - ContinuousRelease 43 kB/s | 8.3 kB 00:00 Error: Failed to download metadata for repo 'cr': repomd.xml parser error: Parse error at line: 66 (Opening and ending tag mismatch: meta line 0 and head ) /etc/yum.repos.d/CentOS-Linux-ContinuousRelease.repo contains: mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch… #baseurl=http://mirror.centos.org/$contentdir/$releasever/cr/$basearch/os/ If I switch these around by commenting out mirrorlist and uncommenting baseurl, it works. Is this a problem with a repo mirror?

1 0

New Server and noticing these maillog postfix entries: What to do about them?
by Jay Hart 21 Nov '21

21 Nov '21

I just stood up a new server running C8 stream, postfix, SA, etc. I keep seeing these log entries in maillog and wonder what to about them. I have not been able to find any research documents detailing if this is a problem nor how to prevent. Any documentation I have seen via web searches talks about configuration issues with spamass-milter. This to me looks like hackers. I get the same four lines over and over again from different IP addresses and the pid/socket/id number (26579 in this instance) are always linked. The number is different for each query/probe. Nov 21 11:56:57 dream postfix/smtpd[26579]: connect from unknown[141.98.10.140] Nov 21 11:56:57 dream postfix/smtpd[26579]: warning: connect to Milter service unix:/run/spamass-milter/spamass-milter.sock: Permission denied Nov 21 11:56:57 dream postfix/smtpd[26579]: discarding EHLO keywords: CHUNKING Nov 21 11:56:57 dream postfix/smtpd[26579]: disconnect from unknown[141.98.10.140] ehlo=1 auth=0/1 quit=1 commands=2/3 What can I try to do to eliminate this? Other than taking up resources I'm not seeing anything else in the logs to show a problem. Should I be concerned? Research has now shown that Redhat/Centos may have changed the default postfix setting. I do see the following parameter set: smtpd_discard_ehlo_keywords = chunking Sounds like I need to add/set this as 'silent-discard' pseudo keyword to prevent this action from being logged. Thanks in advance on your help and advice! Jay

3 5

sshd gives false "Too many authentication failures"
by Andreas Fournier 21 Nov '21

21 Nov '21

I just came across something strange with my fully updated Centos7 server. When I try to ssh into it the same way I've always done I get "Too many authentication failures". This just came out of the blue. I'm using the root account and a password. But in my sshd_config it still reads #MaxAuthTries 6 Which I think is the default. >From the console I can log in fine and when I look in the logs for sshd I can just see the the attempts I just made, that are less than six and no previous denied attemps. Any clues what's going on?

3 4

Last 389-ds update on CentOS 8 Stream seems to be broken
by Mathieu Baudier 21 Nov '21

21 Nov '21

Hello, after updating 389-ds (LDAP dirsrv) on CentOS 8 Stream, this service does not start anymore: $ sudo journalctl -u dirsrv@* | less Nov 20 18:27:31 systemd[1]: Starting 389 Directory Server argeo.... Nov 20 18:27:31 ns-slapd[1951]: [20/Nov/2021:18:27:31.980124142 +0100] - ERR - symload_report_error - Netscape Portable Runtime error -5975: /usr/lib64/dirsrv/plugins/libpwdstorage-plugin.so: undefined symbol: gost_yescrypt_pwd_storage_scheme_init Nov 20 18:27:31 ns-slapd[1951]: [20/Nov/2021:18:27:31.985260818 +0100] - ERR - symload_report_error - Could not load symbol "gost_yescrypt_pwd_storage_scheme_init" from "libpwdstorage-plugin" for plugin GOST_YESCRYPT Nov 20 18:27:31 ns-slapd[1951]: [20/Nov/2021:18:27:31.988423108 +0100] - ERR - slapd_bootstrap_config - The plugin entry [cn=GOST_YESCRYPT,cn=Password Storage Schemes,cn=plugins,cn=config] in the configfile /etc/dirsrv/slapd-argeo/dse.ldif was invalid. Failed to load plugin's init function. Nov 20 18:27:31 ns-slapd[1951]: [20/Nov/2021:18:27:31.991083901 +0100] - EMERG - main - The configuration files in directory /etc/dirsrv/slapd-argeo could not be read or were not found. Please refer to the error log or output for more information. Nov 20 18:27:32 systemd[1]: dirsrv(a)argeo.service: Main process exited, code=exited, status=1/FAILURE Nov 20 18:27:32 systemd[1]: dirsrv(a)argeo.service: Failed with result 'exit-code'. Nov 20 18:27:32 systemd[1]: Failed to start 389 Directory Server argeo.. $ sudo dnf list 389-ds-* Installed Packages 389-ds-base.x86_64 1.4.3.23-10.module_el8.5.0+946+51aba098 @appstream 389-ds-base-libs.x86_64 1.4.3.23-10.module_el8.5.0+946+51aba098 @appstream After downgrading and restarting it is working again : $ sudo dnf downgrade 389-ds-* $ sudo dnf list 389-ds-* Installed Packages 389-ds-base.x86_64 1.4.3.23-7.module_el8.5.0+889+90e0384f @appstream 389-ds-base-libs.x86_64 1.4.3.23-7.module_el8.5.0+889+90e0384f @appstream $ sudo systemctl restart dirsrv@* Should I fill a bug report for this? (And if yes, where?) Or should some 389-ds plugins be deactivated? Or some upgrade procedure? Thanks in advance for your guidance! Cheers, Mathieu

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Discuss November 2021