Apt

Apt cheat sheet

apt
cheatsheet
debian
howto
linux
ubuntu

The package manager apt gots much more options than one could think. In this cheat sheet they get uncovered.

Ubuntu system hardening guide for desktops and servers

apt
apparmor
firewall
hardening
server hardening
system hardening
system security
ubuntu
ubuntu security
unattended upgrades

Step by step guide to secure any Ubuntu desktop or server. Harden your Ubuntu during installation and afterwards with the available security tips.

How to solve an expired key (KEYEXPIRED) with apt

apt
debian
how-to
linux
software management
ubuntu

Software updates and package management is easy, until you get a KEYEXPIRED message. In this article we should how it happens and the way to solve it.