Category / SysAdmin

While installing hdf5 I got this error : # yum install hdf5.x86_64 Last metadata expiration check: 1:05:47 ago on Tue 14 Jan 2020 01:27:49 PM CET. Error: Problem: conflicting requests – nothing provides libsz.so.2()(64bit) needed by hdf5-1.10.5-4.el8.x86_64 (try to add ‘–skip-broken’ to skip uninstallable packages or ‘–nobest’ to use not only best candidate packages) As […]

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I got this seemingly wrong error message from Centos 8 Linux shell : [[email protected] httpd]# ll total 566 drwxrwxr-x 3 svennd svennd 3 Dec 11 16:23 apps drwxrwxr-x 20 svennd svennd 20 Dec 11 16:23 exts drwxrwxr-x 4 svennd svennd 10 Dec 11 16:23 lib lrwxrwxrwx 1 svennd svennd 8 Dec 11 16:23 tclsh -> […]

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Set IPMI to use DHCP

4 December, 2019

If you installed ipmitools, you can change the IP address source from static to DHCP or otherwise. To change to DHCP : ipmitool lan set 1 ipsrc dhcp Check what is now setup : ipmitool lan print example : [[email protected]~]# ipmitool lan print Set in Progress : Set Complete Auth Type Support : NONE MD2 […]

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Disable 2FA in Proxmox 6

21 November, 2019

I was checking the new version of Proxmox, when I noticed there is an option to enable 2FA; (see the docs) It works really fine, but then I realized my colleague’s probably don’t have the key. To disable however, I couldn’t find it online; So I digged in the guts of Proxmox /etc/pve/user.cfg there is […]

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I got this weird error; Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50162 Library:50524 Filename: mysqli/mysqli_driver.php After checking PHP seems there was a different version of MariaDB installed; 5.5 vs 10.1; php -i |grep API Server API => Command Line Interface PHP API => 20160303 Zend Extension Build => API320160303,NTS PHP Extension Build => API20160303,NTS MHASH API Version => Emulated Support Client API library […]

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Finally got time to give Centos 8 a spin in a Proxmox Linux container (lxc); I downloaded the template, and started a container only to find its not possible : extracting archive ‘/var/lib/vz/template/cache/centos-8-default_20191016_amd64.tar.xz’ Total bytes read: 673566720 (643MiB, 37MiB/s) Detected container architecture: amd64 TASK ERROR: unable to create CT 100 – unsupported centos release ‘CentOS […]

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This is a mount issue, that I haven’t faced lately anymore; It was however in my drafts for so long; I might as wel write it up; linux_raid_member is a filesystem that is part of a software RAID meaning you need at least two disks to read the data in a “normal” state. So it […]

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Library missing during install of MongoDB : gssapi/gssapi.h: No such file or directory On Centos 7.6 it gets fixed by : yum install krb5-devel.x86_64 krb5 is a development package for kerberos, a network authentication system; Kerberos is a network authentication system. The krb5-devel package contains the header files and libraries needed for compiling Kerberos 5 […]

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A quick fix for a weird issue that in Proxmox unprivileged container fails to install filesystem update on Centos 7 : [[email protected] ~]# yum install filesystem Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: ftp.belnet.be * extras: ftp.belnet.be * updates: ftp.belnet.be Resolving Dependencies –> Running transaction check —> Package filesystem.x86_64 0:3.2-21.el7 will […]

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Today, I had a new issue, a server blankly refused to reboot/shutdown. [[email protected] ~] reboot -h now Failed to start reboot.target: Connection timed out See system logs and ‘systemctl status reboot.target’ for details. Failed to open /dev/initctl: No such device or address Failed to talk to init daemon. I first tried : [[email protected] ~]# systemctl […]

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