If you have a task that you are performing with any regularity, then you can write a script which will do that for you. The only question is how to do it. I encourage you to grab a book on working with CLI, like this one for example – The Linux Command Line, 2nd Edition: A Complete Introduction. But for now I expect you will be grabbing script from GitHub or other RaspberryPi related sites and wondering how to make it work.
Creating script file
In order to create a script file, create a new file with .sh extension, e.g. example_script.sh
Each script file needs to start with a shebang – #! after which you specify the shell that will execute the script. Default shell for RaspberryOS and Debian-based distributions is Bash.
In order to execute the script the file needs execute permissions. Run the following
sudo chmod +x example_script.sh
Example script file
echo "Hello world!"
This is a rudimentary script that will display the well-known “Hello world!” message in your terminal window.
In order to execute a script file named example_script.sh you just have to type the name prefixing it with ./ like so
But you have to be in the same directory where the script is located.
If you are in a different directory, instead of prefixing the name with ./ use the full path to your script, like so
After you press ENTER, the script will be executed.