In the previous post, we went through an example of installing Debian GNU/Linux. Once the installation is complete, it is a good idea to adjust the system for comfortable everyday use and customize it to your needs. In this article, I will share the basic steps I usually perform myself. This approach applies to most Debian-based distributions.

If your workstation doesn’t have an SSH key pair set up yet, it’s time to fix that. In a Windows environment, PuTTY is commonly used, while Linux relies on the standard openssh-client. You can generate keys on Windows using PuTTYgen. The recommended and most secure key type is Ed25519 (EdDSA).

In September, critical vulnerabilities were discovered in RouterOS that allow remote administrative access to the system. This cheat sheet covers the practical step-by-step process of updating RouterOS.

In a previous post, we installed the Debian GNU/Linux operating system. Keeping systems secure and stable requires regular updates. Below is a quick cheatsheet with commands for Debian- and RHEL-based distributions.

The Linux kernel automatically frees up memory by dropping stale data and caches to maintain optimal performance. Manual cache clearing is rarely necessary, but when needed, it can be done with a few simple commands.