Linux Terminal Commands

file : Tells you which type of file you have.
grep : Searches the files for the given argument.
pv : Monitor the progress of a data through a pipe. Progress bar.
tldr : This is like a very brief resume of the man pages.
jq : This is used to parse json files on terminal. You can pipe it to a command to parse the output.

Note

You should learn how to use nicely awk , sed and grep commands.