Deploy, Configure, Maintain

Schedule tasks with cron and at. Manage services with systemctl. Configure time synchronization with chrony. Work with dnf repositories, module streams, and GRUB kernel management.

Labs in this module

cron: Scheduled Tasks - Program the system to run recurring tasks on a clock with cron. List jobs with crontab -l, edit them with crontab -e, remove the whole table
at: One-Shot Jobs - Run a command once, at a time you name, then have it clean itself up. Queue a one-shot job with echo cmd at <time, where <time is a clock ti
Services with systemctl - Get a service into the right state and keep it there across a reboot. The core exam trap: start runs a service now but does not survive a re
systemd Timers - Schedule work the modern RHEL 10 way with systemd timers. A .timer unit holds the schedule and starts a .service of the same name that does
chrony: Time Synchronization - Keep a RHEL 10 machine's clock locked to real time and prove it. Read the overview and set the zone with timedatectl, point chrony at a time
dnf Repositories and Packages - Drive the RHEL 10 package manager end to end. See where software comes from with dnf repolist, install a package and its dependencies with d
GRUB Modifications - Make boot changes that persist. Read the current kernel with grubby --default-kernel and grubby --info=DEFAULT, then change the kernel comma
Flatpak Applications - Install and manage desktop applications delivered as Flatpaks on RHEL 10, the ones dnf cannot find. Confirm the tool with flatpak --version,
Mission Control: Operation Rollout - The RHCSA deploy-configure capstone on a real RHEL 10 machine. Commission a fresh server: a nightly cron job, a service enabled and started,