MySQL default password & login
Relational database. Modern installers (8.x) prompt you to set the root password on install; older Debian installs auto-generate it (see /etc/mysql/debian.cnf).
Use these credentials for the very first login to MySQL only. The full vendor documentation linked below explains how to rotate them and harden the install.
Notes & recovery
Reset with: mysqld --skip-grant-tables. On macOS Homebrew the initial root has NO password.
Official documentation →Change the default immediately
Anyone with internet access can try the published default on MySQL. Set a strong, unique password the moment you finish first-time setup, ideally before exposing the service to your LAN.
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