Recreate mysql data dir

Recreate mysql data dir (without backup)


systemctl stop mysql

(rm -r /var/lib/mysql)
mkdir /var/lib/mysql
chown mysql. /var/lib/mysql

mysqld --initialize

You can find password for root in /var/log/mysql/error.log
~A temporary password is generated for root@localhost: xxxxxxxx~

mysql -u root -p

systemctl start mysql

mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');