1： 卸载前关闭MySQL服务
[root@localhost mysql]#systemctl stop mysql
2： 检查安装了MySQL组件，并卸载
[root@localhost mysql]# rpm -qa | grep -i mysql
mysql-community-server-5.7.23-1.el7.x86_64
mysql-community-client-5.7.23-1.el7.x86_64
mysql-community-libs-5.7.23-1.el7.x86_64
mysql-community-devel-5.7.23-1.el7.x86_64
mysql-community-common-5.7.23-1.el7.x86_64
mysql-community-libs-compat-5.7.23-1.el7.x86_64
[root@localhost init.d]# rpm -ev mysql-community-server-5.7.23-1.el7.x86_64
[root@localhost init.d]# rpm -ev mysql-community-client-5.7.23-1.el7.x86_64
[root@localhost init.d]# rpm -ev mysql-community-libs-5.7.23-1.el7.x86_64
[root@localhost init.d]# rpm -ev mysql-community-devel-5.7.23-1.el7.x86_64
[root@localhost init.d]# rpm -ev mysql-community-common-5.7.23-1.el7.x86_64
[root@localhost init.d]# rpm -ev mysql-community-libs-compat-5.7.23-1.el7.x86_64
3： 收集MySQL对应的文件夹信息并删除
[root@localhost init.d]# whereis mysql
mysql: /usr/share/mysql
[root@localhost init.d]# rm -rf /usr/share/mysql
[root@localhost init.d]# find / -name mysql
/var/lib/mysql
/var/lib/mysql/mysql
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