What is the difference between
a dash (-) and two dashes (--)
in command line aurguments.


What is man command useful for?

What is 'help' command?

What is most common use of command line?

Commands to
- restart a server
- restart regularly at 2am
- list of webservices running on the server
- number of clients connected to the server


What is the meaning of this command
ls /*ot

What is this command?
which
bash
zsh

What is REPL?


How do you save and exit from VI?