I want to know the basics of vi editor because I am new to linux and currently I am using ubuntu 16.04.
<esc>:q!To close the file without saving.
<esc>:wqTo close the file with saving.
Those are the first two commands that I teach people who need to use VIM in a pinch. They are useful, and provide a base for understanding the use of the
<esc> key and
As Christian mentioned in his comment, VimTutor is probably the best way to learn VIM. Just type
vimtutor at the CLI and follow the instructions on the screen.