scripting.md

Shell scripts

Commands can be combined together into a file which can then be executed. As a (silly) example, copy the following into your favourite text editor:

while :
do
echo Raspberry Pi!
done

Now, save this with the name fun-script. Before you can run it you must first make it executable, this can be done by using the change mode command chmod. Each file and directory has its own set of permissions that dictate what a user can and can't do to it. In this case, by running the command chmod +x fun-script, the file fun-script will now be executable. You can then run it by typing ./fun-script (assuming that it is in your current directory). This script infinitely loops and prints Raspberry Pi!, in order to stop it press Ctrl + C. This kills any command that's currently being run in the terminal.