Ubuntu

Apt cheat sheet

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

How to show all installed packages on Ubuntu

Query the package manager to show installed packages on Ubuntu systems including version details.

Troubleshooting a full /boot partition on Ubuntu

Is your /boot partition full and apt can no longer install updates? Learn how to fix this issue and what you can do to prevent it.

Ubuntu system hardening guide for desktops and servers

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

Discover to which package a file belongs to

With the right Linux software tools, it is easy to find to which package a file belongs. Or the opposite, what files are part of an installed package.

How to solve an expired key (KEYEXPIRED) with apt

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.

How to Disable “System program problem detected”

This article shows how to deal with the message System program problem detected

Linux vulnerabilities: from detection to treatment

How to deal with Linux vulnerabilities? This article shares the insights, methods, and tools to help with detection and prevention on Linux systems.

Using unattended-upgrades on Debian and Ubuntu

To counter the biggest threat to software packages, Debian and Ubuntu based systems can use unattended-upgrades, to install security patches automatically.

What’s New in Lynis 2: Features

The upcoming Lynis 2 release will bring many new features. Focus is on simplicity, speed and supporting newer technologies like Docker and systemd.

How to solve Shellshock on Debian and Ubuntu

Also Debian and Ubuntu are vulnerable for Shellshock vulnerability in Bash. That's why it is important to run apt update and perform an upgrade of Bash.

Check for a required reboot on Debian and Ubuntu systems

Debian based systems, like Ubuntu, need sometimes a reboot as well. We have a look on determining if a required reboot is needed and due to what packages.