首先在终端中查看MySQL的依赖项：dpkg —list|grep mysql

卸载： sudo apt-get remove mysql-common

卸载：sudo apt-get autoremove —purge mysql-server-5.7

清除残留数据：dpkg -l|grep ^rc|awk ‘{print$2}’|sudo xargs dpkg -P

再次查看MySQL的剩余依赖项：dpkg —list|grep mysql

继续删除剩余依赖项，如：sudo apt-get autoremove —purge mysql-apt-config