Last change: 2025-01-06
Dig is one of the primary tools when it comes to DNS. Resolve names, perform queries, troubleshooting any issues related to DNS. It's always DNS!
Sockets articles
Last change: 2025-01-06
The command fuser is a tool for Linux systems to show the process or processes that have a file or socket opened and can be used for troubleshooting.
Last change: 2025-01-06
Harden system and user services by restricting systemd units to use system call bind() on sockets specified with the unit setting SocketBindDeny.
Last change: 2025-01-06
Get information about open files on Linux using the lsof command. This cheat sheet covers many common uses for using lsof and how to use it.
Last change: 2025-01-06
If you want to learn more about network connections on Linux, then ss is the tool to get the job done. Learn how to use it with this cheat sheet.