Making the vacation message in the unix email system

I do not know if the commands apply to every server. It is the way how our department email server works now.

1. Check and see current vacation message: cat .vacation.msg
2. Edit vacation message: vi .vacation.msg
3. Edit vacation message within vi editor: I am not familiar with vi at all, and for me to remember all the commands. Here are some essentials:
   
• dd: delete entire line
• dw: delete the character before the cursor
• ":" : go to the command line
• wq: save and quit of the file used in command line
4. Activate vacation message: mv inactiveDotForward .forward
5. De-activate vacation message: mv .forward inactiveDotForward