Learn how to create pipes and rules in OPNsense, in order to prevent a single user/host on your network from using up all of your internet bandwidth, without affecting internal LAN networking (fast internal file transfers etc).
A timestamped video from Jim's Garage showing how to deploy Nebird yourself in a self-hosted manner.
A tutorial for help getting started and demonstrating an incredibly simple use of protocol buffers in PHP.
A video demonstrating the use of ZFS to snapshot and restore a MySQL database in seconds and why this is useful.
Learn how one can use nftables for implementing firewall rules, whilst using Docker. However, this will require Docker to run in host networking mode.
Learn how to create a custom "item" in order to monitor temperatures on a system.
Instructions on how to Install LibreWolf on Debian based distros.