卸载重装前请备份数据库
卸载
sudo apt autoremove --purge mysql-server-core-5.7
清理残留
sudo rm -r /var/lib/mysql*
sudo rm -r /etc//mysql
重新安装
sudo apt install mysql-server
卸载重装前请备份数据库
sudo apt autoremove --purge mysql-server-core-5.7
sudo rm -r /var/lib/mysql*
sudo rm -r /etc//mysql
sudo apt install mysql-server