There's a couple of useful tricks for navigating the command line that, while optional, will improve your quality of life. This section has a selection of those tricks.
Bash, by default, saves the history of your commands. It will even save the history across sessions. This can be extremely useful because sometimes we make a small mistake and don't want to retype an entire command, or we want to repeat the same commands over and over. To see your history, type this command:
history
The following is what you should see on running the preceding command:
You can see that there is a numbered list of output commands. To repeat a numbered command, you can use the bang character, !. !<number> will repeat the number command verbatim:
!10
The following is what you should see on running the preceding command:
A double bang, !!, will repeat the...
