Chapter 15: Scripts and scheduling

Bash scripts and scheduling quiz

Ten questions across the whole chapter. Each answer explains why. Aim for eight before moving on to chapter 16.

• What does exit status 0 mean?
• Which line makes a script run with bash when executed directly?
• How do you handle a missing argument safely?
• Which prints each argument as a separate word?
• Which cron expression runs at 02:30 on weekdays?
• Where do you see whether cron ran a job?
• A cron command containing date +%F fails. What do you change?
• Which command lists your personal crontab?
• What triggers hello.service when hello.timer is enabled?
• Which tool runs a job once, later?