How to unpack the various system.img, cache.img, userdata.img, boot.img, recovery.img, etc.

Pyreverse analyses Python code and extracts UML class diagrams and package depenndencies

From the Arch BBS

From the Fedora Wiki

Useful insights on how to open the correct ports, and setup the right DNS records for xmpp

Free Information Security portal containing a directory of our favourite security products.

Dockerfile to build an ejabberd container image.

Notes for ejabberd: no need to download the CA certificate since it's already included in fullchain.pem