Thomas @thomas@metalhead.club

May I introduce to you: The QT4 Dance. 🤦‍♂️

https://youtu.be/NbTEVbQLC8s

#qt #dance #linux #windows #gui

Ah btw: The issues with Tmate on Fedora are fixed :-)

There was a library compatibility issue some weeks ago, if I remember correctly.

For those who don't k now https://tmate.io ... it's a great tool for sharing your command line :-)

#tmate #fedora #linux #tool

WTF

#linux #security

Docker in LXD in Snap in a KVM VM on a physical host.

Can you beat it?

#container #linux

Most of my Debian Stretch servers are now upgraded to Debian Buster 🙂

It worked like a charm on most machines. I had to take manual action just twice, when there were problems with PostgreSQL (ver. 9.6 => 11) and zfs-dkms.

#debian #linux

Sometimes I do stupid things. Like overprovisioning my host's CPUs by creating an 16 vCore VM on a 2x8 cores host.

Just because you have two CPU sockets doesn't mean you should use them both for a single VM. Doing that means more complex memory sharing during CPU operations, which creates a significant performance penalty.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/virtualization_tuning_and_optimization_guide/sect-virtualization_tuning_optimization_guide-numa-numa_and_libvirt

Now with only 8 cores attached, my Nextcloud VM runs faster than with 16 vCores. 🙂

#linux #kvm #virtualization

Replaced postfix by msmtp-mta on various hosts.

Postfix seemed to be overpowered for sending system/cron emails only.

#linux #postfix #msmtp

I would really like to use the CSS color schema media query to implement a dark mode for my blog.

https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme

Unfortunately it does not seem to work on my system. GTK dark mode is activated, Firefox dark theme is activated... still the media query does not work.

Is it a general issue on Linux? or is it Wayland?

regarding Wayland / Sway ... it should work: https://github.com/swaywm/sway/wiki/GTK-3-settings-on-Wayland

#firefox #linux #css #webdev #darkmode

Fail2ban 0.10 unterstützt IPv6

https://www.admin-magazin.de/News/Fail2ban-0.10-unterstuetzt-IPv6

Hab das damals gar nicht mitbekommen. Man kann sich 0.10 aus den Debian backportsziehen ... oder noch auf das neue Debian 10 warten ;-) Das kommt ja auch im Juli.

#ipv6 #fail2ban #linux #server #sysadmin

Oh man. Schon wieder so spät. Die Zeit vergeht so schnell, wenn man Serverkram für Anoxinon e.V. erledigt ;-)

#anoxinon #servermigration #linux

Hey Linux sysadmins, I have another blog post for you 🙂

LXD: Prefer IPv6 addresses for outgoing connections

https://thomas-leister.de/en/lxd-prefer-ipv6-outgoing/

It took me some time to find the cause, but I'm even happier now!

#linux #lxd #ipv6

... Successfully built my first package on Fedora COPR :-) 🎉

https://copr.fedorainfracloud.org/coprs/leisteth/yggdrasil/

#fedora #linux #copr #yggdrasil

A Conversation with Kernel Developers from Intel, Red Hat and SUSE https://www.linuxjournal.com/content/conversation-kernel-developers-intel-red-hat-and-suse

#linux

Fedora 30 glänzt mit schickem Start und Performance-Verbesserungen | c't Magazin - https://www.heise.de/ct/artikel/Fedora-30-glaenzt-mit-schickem-Start-und-Performance-Verbesserungen-4410370.html

Ich denke, Fedora 30 wird nach ca 3 Jahren mal wieder eine frische Installation. Im Prinzip funktioniert mein Rechner prima, nur eine Sache gibt es: Ärger mit dem Standby. Mit dem Button klappt es gar nicht (er geht dann nur so halb in den Standby) und Zuklappen geht.

Irgendwas ist da am Powermanagement von mir "kaputt gebastelt" und ich bin nicht sicher, was.

#fedora #linux

Trying fish shell as an alternative to zsh ...

https://fishshell.com/

#linux #fish #shell #zsh

Make LXD use your server's public network interface

https://thomas-leister.de/en/lxd-use-public-interface/

#lxd #blog #container #linux

Handy tool of the day: archivemount. https://github.com/bramp/archivemount #linux

Working on a Fedora COPR Repo for Sway.

There's already repositories for that, but I'd like to have one for the current Beta version. And of course, I'd like to learn and practice how that works.

#fedora #sway #linux

Hat hier jemand Lust, einen meiner Kunden zu übernehmen? Es geht vor allem um die Wartung von Nextcloud und Mailcow.

Beides mit Docker. Es handelt sich um einen Businesskunden.

#linux #nextcloud

Recommend #Linux guys to follow on #Mastodon :-)