Recently I was stuck with one problem in linux configuration. I wanted to rsh to one machine A from other machine B but I was continuously getting “rcmd socket permission denied” error.

Useful Vi editor commands.
If you are using Unix then you must have used the VI editor for text edition. Vi Editor is the best editor in my view. If you have practiced enough and mastered the frequent command then you can understand its power.
I have summarized the basic commands and some useful command one should know to speed up VI editor use. I will not go in to details of how commands work.
There are mainly three modes of commands in VI editor, Insert mode, Command mode and colon mode. …