Linux for sysadmins -- Creating a Wildfly load-balancing cluster on Linux

Linux for sysadmins -- Creating a Wildfly load-balancing cluster on Linux
https://linuxtechlab.com/creating-wildfly-cluster-linux/

Linux from the command line -- Monitoring Docker

Linux from the command line -- Monitoring Docker

Just what are those containers up to? How much of your resources are they using?
https://kerneltalks.com/virtualization/docker-container-utilization-monitoring/

Linux from the command line | Linux for sysadmins -- modifying RPM packages with rpmrebuild

Linux from the command line | Linux for sysadmins -- modifying RPM packages with rpmrebuild

For those of you not in the Ubuntu cult, RPM packages may be a regular part of your Linux life, but nothing is perfect. What if you finally found an RPM package for that obscure piece of software you can't live without, but it's missing a file? Don't sweat it, fix it yourself.
https://linuxconfig.org/how-to-modify-an-rpm-package-using-rpmrebuild

Linux from the command line -- The sleep command

Linux from the command line -- The sleep command

Sometimes you need your system to wait before doing something, especially in a script. The sleep command is just what the penguin ordered.

There are plenty of uses outside of scripts too. Like when combined with the shutdown command.
https://www.howtoforge.com/linux-sleep-command/

Linux for sysadmins | Linux from the command line -- Security auditing with Lynis

Linux for sysadmins | Linux from the command line -- Security auditing with Lynis

Being proactive about security is one of the hallmarks of a good sysadmin. Security auditing and pen testing is part of that. From the early days with a handful of tools like SATAN and Metasploit to now when we have even more and better tools available, there's no excuse for not having a few in your toolbox and using them regularly. It's either that or end up on the news doing the walk of shame after getting fired because your company had a big data breach.
https://www.linuxtechi.com/lynis-security-auditing-tool-linux-servers/

Linux for sysadmins | Linux from the command line -- Testing a package without installing it using Nix

Linux for sysadmins | Linux from the command line -- Testing a package without installing it using Nix

I'm sure everyone can appreciate the ability to test or use some software without having to go through the hassle of installing it, not to mention dealing with the changes, and mess, that can make of your system. Nix lets Linux users avoid all that.

https://www.ostechnix.com/how-to-test-a-package-without-installing-it-in-linux/

Linux from the command line -- interactively killing Linux processes with fkill

Linux from the command line -- interactively killing Linux processes with fkill
https://www.tecmint.com/fkill-kill-linux-process-by-name-or-pid/