sysadmin horror stories
A real-world AlmaLinux 10 SELinux migration from fully disabled to enforcing on a server running Apache, Remi PHP-FPM, BookStack, a Laravel controller, MariaDB, custom SSH port 65535, cron jobs and custom writable paths — with troubleshooting commands and a practical SELinux cheatsheet.
A real-world BookStack upgrade from v25.02.2 to v26.05.3: service-account Git ownership, runuser, backups, Composer/PHP version mismatches, Laravel migrations, writable storage, and the checks that tell you the upgrade actually worked.
A real-world, step-by-step AlmaLinux 8 → 9 → 10 in-place upgrade guide using ELevate: backups, Leapp inhibitors, VDO checks, NetworkManager migration, third-party packages, MariaDB, old EL packages, and the post-upgrade cleanup nobody tells you about.