Vim
A reference
Open existing file
vim <existing-file.txt>
Starts a new Vim session to edit the existing file
Open new file
vim <new-file.txt>
Starts a new Vim session to create a new file
Enter Insert mode
i
Puts you into Insert mode so you can type
Exit any active mode
esc
Exits any mode you might be in
Save document
:w
After exiting any active modes, type :w to save
Quit Vim
:q
After exiting any active modes, type :q to quit
Save and quit
:wq
After exiting any active modes, type :wq to save and quit