Linux Terminal Basics #10: Getting Help in Linux Terminal
These days, you can search the internet for the usage and examples of any command.
But it was not like this when the internet didn't exist, or it was not as widely available to everyone.
For this reason, commands in Linux (and the operating systems before it) come with a help or manual page (man pages). This worked as a reference and users could access it anytime to see what options were available for a command and how it worked.
The man pages are still relevant in this age of information abundance.
First, they are the original command documentation and hence the most trusted source on command usage.