解除安裝mysql的時候先把mysql服務停止。

[root@localhost mysql]# service mysql stop

查詢mysql安裝檔案的相關目錄

[root@localhost ~]# whereis mysql
mysql: /usr/lib64/mysql /usr/local/mysql /usr/share/mysql /usr/local/mysql/bin/mysql
[root@localhost ~]# find / -name mysql
/etc/rc.d/init.d/mysql
/etc/selinux/targeted/active/modules/100/mysql
/root/hbk/mysql-5.6
 
.33-linux-glibc2.5-x86_64/bin/mysql
/root/hbk/mysql-5.6.33-linux-glibc2.5-x86_64/include/mysql
/var/spool/mail/mysql
/usr/lib64/mysql
/usr/share/mysql
/usr/local/mysql
/usr/local/mysql/data/mysql
/usr/local/mysql/data/mysql/mysql
/usr/local/mysql/bin/mysql
/usr/local/mysql/include/mysql
/home/mysql

刪除所有相關檔案

[root@localhost ~]# rm -rf /root/hbk/mysql-5.6.33-linux-glibc2.5-x86_64/
 

[root@localhost local]# rm -rf /usr/local/mysql/
[root@localhost local]# rm -rf /var/spool/mail/mysql 
[root@localhost home]# rm -rf /home/mysql
[root@localhost home]# rm -rf /etc/rc.d/init.d/mysql 
[root@localhost etc]# find / -name mysql

剩下這些即可（我發現如果刪除了，虛擬機器會莫名的報錯）

[root@localhost ~]# find / -name mysql
/etc/selinux/targeted/active/modules/100
 
/mysql
/usr/lib64/mysql
/usr/share/mysql

刪除配置檔案my.cnf

[root@localhost etc]# rm -rf /etc/my.cnf

刪除mysql使用者及組

uid=1000(mysql) gid=1000(mysql) groups=1000(mysql)
[root@localhost etc]# userdel mysql