Man Pages

Linux contains manual files or “man pages” for almost everything. Man pages contain usage and guidance for commands. They can be accessed using “man <name>”.

When you first start a shell you will be presented with the following:

When you are unsure of how something works, it best to consult the relevant man pages first, additionally using online resources can also be very helpful. Digital Ocean's tutorials are definitely something to check out for more in-depth explanation.