Conditionals: Does the File Exist?

Scripts make decisions with if. The test [ -f PATH ] is true when PATH is an existing regular file.

Write /root/scripts/check.sh that prints 'present' if /root/data/config.ini exists and 'absent' if it doesn't. The file has been seeded for you, so a correct script prints:

present

Structure: if [ -f /root/data/config.ini ]; then echo present; else echo absent; fi. Grading runs your script with the file present and checks it prints 'present', then runs it again with /root/data emptied so config.ini is gone and checks it prints 'absent' — so test for the file rather than printing a fixed word; the else branch is what makes it a real conditional.