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What is Cron Job?

A scheduled task in Unix-like systems that runs automatically at specified times or intervals.

Cron is a time-based job scheduler. Users define tasks in a crontab file using a specific syntax: minute, hour, day of month, month, day of week, followed by the command. For example, "0 2 * * * /backup.sh" runs a backup script at 2 AM daily.

Cron is essential for system maintenance, log rotation, automated backups, and any recurring task.

Related Terms

Ulimit
A command that sets or displays resource limits for user processes, such as maximum open files or memory usage.
File Permissions
A security mechanism that controls who can read, write, or execute files and directories in Unix-like systems.
Procfs (/proc)
A virtual filesystem in Linux that provides an interface to kernel data structures, exposing process and system information as files.
Package Manager
A tool that automates the process of installing, updating, configuring, and removing software packages.
RAID
Redundant Array of Independent Disks — a technology combining multiple physical drives into a single unit for performance, redundancy, or both.
Journalctl
A command-line tool for querying and viewing logs collected by systemd's journal logging system.
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