MySQL 卸載

先查看下，把MySQL停下來
查看進程狀態
ps -ef | grep mysql
查看mysql服務狀態
service mysqld status
中止mysql服務
service mysqld stop

檢查是否安裝MySQL
[root@rdtest ~]# rpm -qa | grep -i mysql
mysql-libs-5.1.73-8.el6_8.x86_64
[root@rdtest ~]# rpm -e mysql-libs-5.1.73-8.el6_8.x86_64
error: Failed dependencies:
libmysqlclient.so.16()(64bit) is needed by (installed) postfix-2:2.6.6-8.el6.x86_64
libmysqlclient.so.16(libmysqlclient_16)(64bit) is needed by (installed) postfix-2:2.6.6-8.el6.x86_64
mysql-libs is needed by (installed) postfix-2:2.6.6-8.el6.x86_64
[root@rdtest ~]# rpm -e –nodeps mysql-libs-5.1.73-8.el6_8.x86_64

rpm -e –nodeps 包名
若是提示依賴包錯誤，則使用如下命令嘗試
rpm -ev mysql-libs-5.1.73-8.el6_8.x86_64 --nodeps
若是提示錯誤：error: %preun(xxxxxx) scriptlet failed, exit status 1
則用如下命令嘗試 rpm -e --noscripts mysql-libs-5.1.73-8.el6_8.x86_64

查找MySQL的安裝目錄並完全刪除
[root@rdtest ~]# find / -name mysql
/var/spool/mail/mysql
/usr/local/include/mysql
/usr/local/mysql
/usr/local/mysql-5.7.22-linux-glibc2.12-x86_64/include/mysql
/usr/local/mysql-5.7.22-linux-glibc2.12-x86_64/bin/mysql
/opt/data/mysql

[root@rdtest ~]# rm -Rf /var/spool/mail/mysql /usr/local/include/mysql /usr/local/mysql /opt/data/mysql /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64/

刪除一些配置文件
配置文件通常有/etc/my.cnf 或/etc/init.d/mysql.server
[root@rdtest ~]# rm -rf /etc/my.cnf

刪除MySQL用戶以及用戶組
[root@rdtest ~]# userdel mysql
[root@rdtest ~]# id mysql
id: mysql: No such user

檢查一遍mysql 是否成功刪除
rpm -qa|grep -i mysql