Phenquestions
Did you ever come across a situation where you want no one to access your Ubuntu's Terminal, except you? Locking the screen is one thing you can do, but for whatever reason you chose to allow a person to use your PC, but you wouldn't like him/her to use the most crucial part of Linux system, the Terminal.
I don't doubt the idea. Here is a guide on how to password protect the Terminal. Note that I'm not talking about the root password that is needed to execute any admin privilege commands with in the Terminal, but my intent is, a user will not be able to even see the Terminal interface itself without entering the root password.
Password Protecting Ubuntu Terminal
This guide is tested on Ubuntu 17.10, but should work on Ubuntu 16.04, 16.10, Linux Mint, and elementary OS.
Step 1) Launch 'Terminal'.
Step 2) Go to “Edit” > “Profile Preferences”.
Step 3) Click “Command” tab.
Step 4) Check the box “Run a custom command instead of my shell” and enter su username in the box. For example in my case it's going to be su kiran as shown in below screenshot.
Step 5) In the section “When command exits:”, you will see three options on what will happen if a user enters wrong password. You can select “Exit the terminal”. In this case, the Terminal will simply quit upon entering incorrect password without warning. You can also select “Restart the command” which will make Terminal to show “Authentication failure” error and lets user to reenter password. In this example, I chose “Restart the command” option.
Step 5) Click “Close”.
Step 6) Try to launch Terminal now. It will ask for password and won't show the Terminal prompt without entering the correct password.
Hope you find this guide useful. Have a good one guys!
