I know how to display line numbers (and columns) in the mode-line, but I'd like emacs to display the line numbers for all the lines on the left-hand side. I've seen this done in vim and other text editors. How do I do this for emacs?
lists a few different options.
monotux's answer is currently the first option listed there. An alternative (also listed) is NLinum:
You should be able to install from ELPA:
M-x package-install RET nlinum RET
and then use it e.g. like this:
(use-package nlinum :config (global-nlinum-mode))
linum-mode→ old, hack, slow. Emacs 23 (released in 2009).
global-display-line-numbers-mode→ Emacs 26 (beta as of 2018-03-30)
Put this in your emacs init file:
(when (version<= "26.0.50" emacs-version ) (global-display-line-numbers-mode))