Linux tutorials
Linux tutorials for installing software, using the terminal, configuring systems, and learning practical open source workflows.
625 guides · page 2
How to Create a Swap File on Debian 13 (Trixie)
A swap file gives Debian 13 extra room when RAM runs out. Without swap, the kernel’s out-of-memory killer can end a busy process, such as a database or a PHP worker, with no warning. This guide is for anyone running Debian 13 “trixie” on a small VPS,...
Free Let’s Encrypt SSL with Certbot on Debian 13 and nginx
Let’s Encrypt issues free TLS certificates, and Certbot is the client that requests them and installs them into your web server. On Debian 13 (Trixie) both Certbot and its nginx plugin are in the main archive, so you can set up HTTPS with APT alone. This guide...
How to View and Manage Logs with journalctl on Debian 13
On Debian 13 (trixie), system logs are collected by systemd-journald and read with journalctl. This guide shows how to follow logs live, filter them by service, time, priority and boot, read kernel messages, check that the journal is saved to disk, limit how much...
How to Set Up SSH Key Authentication on Debian 13
SSH keys let you log in to a Debian 13 server without typing a password, and once keys work you can switch password login off entirely. That blocks the password-guessing attacks that hit every public server. This guide is for anyone managing a Debian 13...