Enable Sudo on systems that ship without it

Problem

You might be used to a sudo based workflow. Some systems, like Ubuntu, ship with it enabled and configured by default. Others, like Debian, do not.

Solution

Here is how get sudo working on a system that does not have it.

First, switch to root:

su -

Next, install the sudo package using apt, rpm or other package manager. On apt based systems do:

apt update
apt install sudo

Next you will need to add yourself to the sudoers group:

usermod -aG sudo username

Now completely log out, and log back in for this to take effect.

You should now be able to use sudo with your account.

You will need to add any other users who need sudo access to the sudo group as shown above.