systemd-analyze turns “this box boots slow” into hard data. Learn how to measure boot time, identify the true critical-path blockers, generate an easy-to-share SVG boot timeline, lint unit files before deploying changes, and audit service hardening so you can make boots faster and services safer.
WordPress’s “The link you followed has expired” is often a misleading symptom of a server-side upload rejection. When PHP (or the web server) refuses a large POST body—like a theme/plugin ZIP—WordPress never receives the request and falls back to that generic message. The fix is to raise post_max_size and upload_max_filesize (plus a sensible memory_limit), restart PHP-FPM, and re-try the upload.
How tmpfiles rules create runtime directories, enforce permissions, and clean up old files—plus safe patterns and practical examples.
If your /var/log/syslog (Debian/Ubuntu) or /var/log/messages (RHEL/CentOS/Alma/Rocky) has ballooned to multiple gigabytes, you’re usually seeing one of two things: a service spamming logs, or log rotation not running. The good news is you can reclaim space safely without breaking logging — as long as you avoid the classic trap of deleting a file that a daemon still has open. In this guide, we’ll walk through the safest options: rotating with logrotate, truncating in place, recovering space after an accidental rm, and (if needed) vacuuming systemd’s journal.
systemd-cat is a simple way to route command output and pipelines into journald, making scripts and one-off maintenance runs searchable with journalctl.
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