Search And Replace In Neovim And Vim

Everywhere in the file

:%s/foo/bar/g

On the current line

:s/foo/bar/g

Change on current line and next two lines (+2)

:.,+2s/foo/bar/g

Change in each line starting with 'baz'.

:g/^baz/s/foo/bar/g

In all open tabs

:tabdo %s/foo/bar/g  

Change only on specific lines

:5,12s/foo/bar/g

Change all lines from mark a to mark b inclusive.

:'a,'bs/foo/bar/g

Change from the current line (.) to the last line ($) inclusive.

:.,$s/foo/bar/g