#Systemd
2 posts
12 min read
RHEL Intermediate #6: Job Scheduling — cron, systemd timer, at
Four tools for running time-based tasks in RHEL 9, from an operational perspective. Traditional cron and user crontab, anacron that catches up missed jobs when the machine was off, at for one-shot scheduling, and systemd timer as the modern replacement for cron — with a guide on which tool to use in which situation.
11 min read
RHEL Basics #4: Intro to systemd — Services, Targets, journalctl
systemd is RHEL's PID 1. Starting and stopping services with systemctl, enabling auto-start on boot, selecting the system's mode via targets, writing your first .service unit by hand, and reading every log in one place with journalctl.