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Red Hat Certified System Administrator EX200 (RHEL 10) · Domain 7: Deploy, configure and maintain systems

Scheduling tasks with at, cron (crontab -e, /etc/cron.d) and systemd timer units (OnCalendar=, OnBootSec=)

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Last reviewed September 25, 2026 · Leer en español

RHEL gives you three ways to run commands later. at runs a job once at a set time. cron runs jobs repeatedly on a schedule. systemd timer units also run jobs on a schedule or relative to events like boot, and they integrate with logging and service management. The exam may ask for any of them, so know the syntax of each.

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