Tag: systemd

cgroups v2 unified hierarchy explained: read /sys/fs/cgroup/, limit CPU/IO/memory, use systemd slices and PSI pressure files.

systemd-resolved does way more than mangle /etc/resolv.conf. Here's how its stub resolver, split DNS, DoT, DNSSEC, and resolvectl actually work.

Podman runs containers without a daemon, and Quadlets let systemd manage them natively. Here's why that's actually great for self-hosting.

Cron has been scheduling your jobs since before you were born. Systemd timers do everything cron does, plus logging, dependencies, and missed-run recovery.

Podman Quadlets turn containers into real systemd services using .container unit files, no daemon, no hacks, just clean native integration.

Service restart not showing logs? systemd hides stdout. Learn journalctl, systemctl status, and debugging workflows for silent systemd failures.

Learn systemd socket activation to start services on-demand, save RAM, and cut boot time. Includes .socket unit files, real examples, and testing with systemd-socket-activate.

Your Linux box takes forever to boot? systemd-analyze shows exactly which services drag it down. Read blame, critical-chain, plot, and fix the slow ones.

Decode systemctl status: Active state, CGroup processes, recent logs, loaded/enabled state. What each field tells you.

Essential journalctl commands: -u, -f, --since, -p, -k, -b, --no-pager, JSON output. The queries you need on a broken server at 2 AM.