MySQL
–==Remove==–
Try this:
1.Purge mariadb
sudo apt purge mariadb-*
Remove all databases (‘Yes’ answer)
2. Purge mysql
sudo apt purge mysql-*
Remove all databases (‘Yes’ answer)
3. Remove mariadb repo from /etc/apt/sources.list
Find something like this:
deb [arch=amd64,arm64,ppc64el] http://mariadb.mirror.globo.tech/repo/10.4/ubuntu bionic main
4. Remove folders:
sudo rm -r /usr/share/mysql/
sudo rm -r /etc/mysql/
sudo rm -r /lib/systemd/system/mysql.service