Vi editor commands for Linux.

When you open Vi ,it starts in command mode; you have to pres 'ESC' key to goto insertion mode.

e.g: Open VI From linux shell 

>> vi yourfilename
>> {press ESC then : i} Now you can edit (no spaces between : and i)
>>

Following are the basic commands you need to work with the editor. Assuming that you are in the editor,

>> {press ESC then : x}  exit saving changes
>> {press ESC then : q}  exit if there are no changes
>> {press ESC then : q!} exit without saving the changes you made
>> {press ESC then : 20}move the curser to the 20 th line.
>> {press ESC then : d}  delete the current line

There were some additional commands that might come in handy here