How to edit/save a file through Ubuntu Terminal

Question

This is quite a simple question:

I just need to open a file (this filename is galfit.feedme). I can view the file with view galfit.feedme when I\'m in the directory

Answer 1

For editing use

vi galfit.feedme //if user has file editing permissions

or

sudo vi galfit.feedme //if user doesn't have file editing permissions

For inserting

Press i //Do required editing

For exiting

Press Esc

    :wq //for exiting and saving
    :q! //for exiting without saving