Power Tools
Getting Help
Use built-in docs when you forget flags or syntax.
man ls opens the manual page for ls. Navigate with arrow keys; quit with q.
Many commands support --help for a quick summary: grep --help.
Inside bash, help cd shows shell builtins.
When stuck: read the error message, then man or --help on the command you used.
$ Commands to try
$ man ls
$ ls --help
$ help cd
$ type ls
Practice exercise
Run man ls and find what the -h flag does (human-readable sizes). Quit with q.