man
man — full manual for a command. It is one of the commands you type in a terminal, and everything below is produced by running it: the output, the error you get when it goes wrong, and a terminal you can type it into yourself.
What it prints
Run against a small demo project — the same one you get in the terminal below, so the output is what you will see, not an illustration of it.
$ man lsNAME ls — list files and folders USAGE ls [-a] [-l] [folder] DESCRIPTION Shows what is inside a folder (the current one by default). -a show hidden files (the ones starting with a dot) -l print one per line
Other commands
Try it yourself
Same files as above. Nothing here can break, and nothing leaves your browser.
Where you use it
Lessons that have you type man on a real task, rather than read about it.
Written by Mikhail Kuzmitskii