a）查看系统中是否以rpm包安装的mysql
[root@linux ~]# rpm -qa | grep -i mysql
MySQL-server-5.1.49-1.glibc23
MySQL-client-5.1.49-1.glibc23
卸载MySQL-server-5.1.49-1.glibc23和MySQL-client-5.1.49-1.glibc23
[root@linux ~]# rpm -e MySQL-client-5.1.49-1.glibc23
[root@linux ~]# rpm -e MySQL-server-5.1.49-1.glibc23
b)查看有没有mysql服务
[root@linux ~]# chkconfig --list | grep -i mysql
mysql 0:off 1:off 2:on 3:on 4:on 5:on 6:off
删除mysql服务
[root@linux ~]# chkconfig --del mysql
c)删除分散mysql文件夹
[root@linux ~]# whereis mysql
mysql: /usr/lib/mysql /usr/share/mysql
[root@linux lib]# rm -rf /usr/lib/mysql/
[root@linux lib]# rm -rf /usr/share/mysql