So you’ve just installed you fresh copy of Debian Jessie, and you’re keen to test it via the terminal and update it, and you find out, sudo isn’t installed and for you, like for I is quite a bummer.
So here’s how to quickly and in a very simple way install sudo and make it work for ya, sailors.
1. Login in into root by typing su followed by root password
2. Install SUDO
apt-get install sudo
3. Add your user to the SUDOers list
usermod -a -G sudo [your_username]
BANG! You got sudo working for ya!