Ubuntu remove MySQL

sudo rm -rf /var/lib/mysql/

sudo rm -rf /etc/mysql/

Remove MySQL

sudo apt-get autoremove mysql* --purge
sudo apt-get remove apparmor

Check MySQL Info

dpkg --list|grep mysql

Some special circumstances

sudo apt-get remove dbconfig-mysql
sudo apt-get remove mysql-client
sudo apt-get remove mysql-client-5.7
sudo apt-get remove mysql-client-core-5.7

Remove Files

dpkg -l|grep ^rc|awk ‘{print$2}’|sudo xargs dpkg -P

DONE.