Practical Exercise
Make a script executable with chmod, run it with ./, check what is using disk space in a project folder with du -sh, and use curl to fetch a sample public API endpoint.
Real-Life Healthcare Example
A nightly script quietly recalculates bed-availability numbers. One evening it silently stops updating. On-call IT needs to check if the process is still running (ps), see if the server is nearly out of disk space (df -h), and if needed, safely stop a stuck process (kill) before restarting the script correctly with the right permissions (chmod, ./program).