Comment désinstaller complètement Mysql sur Linux Ubuntu 16.04 (pour le réinstaller de zéro)?

LINUX, MySQL

Lors d’un réinstallation de MySQL sur Ubuntu 16.04, je suis tombé sur un enchainement de problèmes qui a rendu la suppression de MySQL difficile (voire impossible).

De nombreuses erreurs lors du démarrage, lors de la désinstallation, lors de la réinstallation, par exemple:

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock

Voici une procédure de désinstallation complète qui a parfaitement fonctionné sur Ubuntu 16.04 avec MySQL 5.7 (mal installé donc).

  • Désinstallation complète (remove –purge)
sudo apt-get remove --purge mysql-server mysql-client mysql-common
sudo apt-get autoremove
sudo apt-get autoclean
  • Vérification des fichiers de données – et effacement si nécessaire
ls /var/lib/mysql
rm -rf /var/lib/mysql
  • Réinstallation
sudo apt-get install mysql-server

Le programme d’installation doit alors vous demander que mot de passe utiliser pour le compte root : taper le nouveau mot de passe et l’installation devrait se terminer sans problème.

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