[ Thanks to darkduck for this link.
]
“1. The “-h” option: The most basic help feature of all, the
“-h” option, is built into most commands. From any command prompt
(local or remote), type the name of the command followed by “-h”.
For example, to find help on SSH type: ssh -h“2. Man: Man in this case has nothing to do with testosterone.
It refers to manuals of commands on your server. It is easy to
start reading any manual. From the command line, just type: man
command-name You can scroll through the documentation with your
arrows, mouse, and the PageUP/PageDown keys. When you are finished,
simply type ‘q’ to exit.”