Issue description

In step 3:

I think there should be a note why this works.

We create a bash script and execute it. Usually you run it via `./control`, however in the above command it "just works".

The reason it works is because the PATH variable of the user is modified that you can just run `control` and it will pick up the script in `/home/student/bin/`.
```
echo $PATH
/home/student/.local/bin:/home/student/bin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin
```
Can you please add a note below point 3, that this works due to the above reason?
Thanks

Workaround:
After the line `[student@servera ~]$ control technical`, add the following note: 'This command works because the /home/student/bin directory is included in the user's PATH environment variable, allowing the system to find and execute the control script directly. Without this inclusion, you would need to use the ./control command to specify the location of the script.'