mysql 8 not starting fix

 mv /var/lib/mysql /mnt

sudo apt-get remove --purge mysql-server mysql-client mysql-common

sudo apt-get autoremove

sudo apt-get autoclean

sudo apt-get install mysql-server

mv /var/lib/mysql mysql-back

mv /mnt/mysql /var/lib/mysql

cp ibdata1 from /var/lib/mysql-back to /var/lib/MySQL

sudo systemctl restart MySQL

done fixed