From reading some other threads on here, I learned about the existence of s-tui. Here is some more information about it https://github.com/amanusk/s-tui#simple-installation
However, when I type the command sudo pip install s-tui
terminal says sudo: pip: command not found
You need to install the pip tool for python 2 with
sudo apt install python-pip
then you use that command of yours!
I know the original question is for 18.04. But as this question is still on top search engines results:
Since Ubuntu 18.10, s-tui is available from default repositories:
sudo apt install s-tui
