Starting the vi editorTo launch the VI Editor -Open the Terminal (CLI) and typevi or And if you specify an existing file, then the editor would open it for you to edit. Else, you can create a new file. VI Editing commandsi - Insert at cursor (goes into insert mode)a - Write after cursor (goes into insert mode)A - Write at the end of line (goes into insert mode)ESC - Terminate insert modeu - Undo..