Add Borders to Windows on Ubuntu



1. Confirm your ubuntu version and codename with lsb_release

user@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 16.04.6 LTS
Release:    16.04
Codename:    xenial

 

2. Make edits to unity.css 

sudo gedit /usr/share/themes/Ambiance/gtk-3.0/apps/unity.css

 -UnityDecoration-extents: 28px 0 0 0;

 -UnityDecoration-extents: 28px 2px 2px 2px;