z/OS Betriebssystem, Unix System Services, zLinux

Cron
Cron is the name of a batch processing program that enables unix users to execute
commands or scripts (groups of commands) automatically at a specified time/date. It is
normally used for sys admin commands, like running a backup script, but can be used for
anything. A common use today is connecting to the internet and downloading your email.
Vixie cron and ISC Cron are modern versions, included with most Linux distributions.
Cron is the software which most closely resembles the z/OS Batch Processing facilities.
However, the z/OS Job Entry Subsystem (JES) provide functions which go far beyond
those offered by cron.