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Linux server tutorials
Step-by-step tutorials for a Linux server: VPNs, web servers, databases, containers, security and backups. Each one names the distributions it was tested on.
2 of 45 tutorials in Networking and VPN tested on Ubuntu 24.04 LTS
How to check open ports on Linux with ss and nmap
List the ports your server listens on with ss, find which program owns each one, then scan the server from outside with nmap to see what the internet can reach.
How to set up a WireGuard VPN server on Ubuntu 24.04
Install WireGuard on Ubuntu 24.04, write the server config, route clients' traffic through it and connect a laptop and a phone.