Crontab is a Unix-based time scheduler for automating repetitive tasks. Users create "cron jobs" by specifying commands and defining when they should run based on a time schedule (minute, hour, day, month, day of the week). It allows users to automate tasks like backups, updates, and scripts at specified intervals. Each user can have their own crontab, and they can edit it using crontab -e. Crontab simplifies system maintenance and task automation on Unix-like systems.
Advanced Shell Scripting Interview Questions
Here are some shell scripting interview questions for experienced developers: