how to add correct answers to grepper code example

Example 1: how to add answer to grepper

// how to find out which shell is running.

ps -p $$ – Display your current shell name reliably

echo "$SHELL" – Print the shell for the current user but not necessarily the shell that is running at the movement.

echo $0 – Another reliable and simple method to get the current shell interpreter name on Linux or Unix-like systems.

readlink /proc/$$/exe – Another option to get the current shell name reliably on Linux operating systems.

cat /etc/shells – List pathnames of valid login shells currently installed

grep "^$USER" /etc/passwd – Print the default shell name. The default shell runs when you open a terminal window.

chsh -s /bin/ksh – Change the shell used from /bin/bash (default) to /bin/ksh for your account

Example 2: how to add answer to grepper

Install / Uninstall gimp:

    For Ubuntu 18.04, this PPA contains the most recent FFmpeg
    libraries copied from Jonathon F's PPA.

     https://launchpad.net/~jonathonf/+archive/ubuntu/ffmpeg-4

    To install, run command:

       sudo add-apt-repository ppa:ubuntuhandbook1/gimp

       sudo apt update

       sudo apt install gimp

    To uninstall, run commands:

       sudo apt install ppa-purge

       sudo ppa-purge ppa:ubuntuhandbook1/gimp