MySQL

A hands-on guide to systemd Unit management and multi-version (5.6/5.7), multi-instance MySQL deployment: two production daemon configs, archive download, initialization, per-instance config files, and start/stop plus three-service status verification.

A complete MySQL 8.0 operations guide: installing from the official binary package, OS prep, initialization, config file, multiple start/stop methods, plus password set/change and forgot-password reset.