The command line. You either love it or hate it, but if you do anything with a Unix-like system you are going to have to use it eventually. You might find marker ...

If you've worked in the terminal, it's likely you're in some way proficient with the command history features of your shell. There's a lot more functionality than many realise however, and learning it ...

If you're serious about security on your Linux machines, you might want to clear the bash history. Learn how to do this more effectively than with just a single command. On your Linux machines, a ...