Getting help in linux

To remember every commands in linux is a very tough job. Even experienced user cannot boast that they have remembered every single command. To get help about commands in linux, a few commands can be used.

1. # man command
   
• format and display manual pages for commands
2. # info command
   
• information document about commands
3. # command --help
• help on commands
4. # whatis command
   
• search the whatis database for complete words
5. # apropos string
• search the whatis database for strings
6. # man -k string
• search manual pages for strings. similar to apropos

You have to change 'strings' to your desired strings and 'command' to your desired command