sudo

sudo allows to run privileged commands without logging in as the root user, thus avoiding the “root session left open” syndrome.

It also allows sharing administrative access to a machine without sharing the root password, logging etc.

Quickstart

1. Install the sudo package.

$ su -c "apt-get update"
$ su -c "apt-get install sudo"

2. Add admin users to sudo group

$ su -c "usermod -aG sudo <user>"

3. Logout, login again, and test

$ sudo whoami