Setting steam and desktop user passwords

About

In order to use elevated privileges requiring use of "sudo," the desktop users password must be set. Additionally, performing actions as the "steam" user requires a password to be set in order to use su - (switching to the home environment of user: steam). All actions must be performed from a terminal window.

Desktop mode

This can be enabled in Steam > Settings > Display > Interface

Locating gnome-terminal

This is located by either:

1. Clicking "Activities" (top left) in desktop mode, and typing gnome-terminal
2. Navigating to /usr/share/applications in a file browser and opening "Terminal"

Set the desktop password

passwd

Set the steam passwd

sudo passwd steam