Vim
How to exit vim ?
Man you are doomed. Restart your computer.
Ref: https://stackoverflow.com/questions/11828270/how-do-i-exit-vim
vim Get Started Tutorial
http://www.openvim.com/tutorial.html
vi cheat sheet
http://www.lagmonster.org/docs/vi.html
vi last character problem
http://stackoverflow.com/a/3665058/4814427
Set line numbers in vim editor
set nu
Ref: https://www.cyberciti.biz/faq/how-to-display-line-number-in-vim/
VIM on mac
Enable press and hold - https://github.com/VSCodeVim/Vim#mac
I think only defaults write -g ApplePressAndHoldEnabled -bool false this is enough.