Copy some line at current position
Say I want to paste line 20 onto my current cursor position:
:20co.
Say I'm on line 10 and I want to paste 20 UNDER line 10
:20co10
Say I want to paste line 20 onto my current cursor position:
:20co.
Say I'm on line 10 and I want to paste 20 UNDER line 10
:20co10