Linux下完全卸载mysql

1.查看是否安装mysql

rpm -qa | grep -i mysql

2.关闭mysql服务

service mysql status    查看运行状态
service mysql stop       停止运行
service mysql status    查看运行状态是否停止

3.卸载mysql的相关组件，ev后面的内容就是步骤一所查到的内容

rpm -ev MySQL-devel-5.6.23-1.linux_glibc2.5

有时候需要按顺序删除，有时候会报以下错误

error: Failed dependencies:
	libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64
	libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64

这时候就要用下面的办法删除

rpm -e --noscripts *********** 

4.收集mysql对应的文件夹信息

find / -name mysql

若果有，都要删掉

rm -rf **********

还需要删除一个配置文件 my.conf

5.删除mysql用户和用户组

[root@izuf6147skj2ic0e6i0599z ~]#  more /etc/passwd | grep mysql
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash
[root@izuf6147skj2ic0e6i0599z ~]# find / -name mysql
[root@izuf6147skj2ic0e6i0599z ~]# more /etc/shadow | grep mysq
mysql:!!:17324::::::
[root@izuf6147skj2ic0e6i0599z ~]# more /etc/group | grep mysql
mysql:x:27:
[root@izuf6147skj2ic0e6i0599z ~]# userdel mysql
[root@izuf6147skj2ic0e6i0599z ~]# groupdel mysql
groupdel: group 'mysql' does not exist

6.确认是否删除

rpm -qa | grep -i mysql