五、Centos7安装mysql：第一步查看系统有无mysql，然后删除之

CentOS下MySQL的彻底卸载

原创 2015年10月12日 00:16:02

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#################CentOS7下MySQL的卸载####################

1：查看MySQL是否安装:

 方式1:

[root@localhost usr]# yum list installed mysql*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.yun-idc.com
 * extras: mirror.neu.edu.cn
 * updates: mirrors.yun-idc.com
Installed Packages
MySQL-client.x86_64   5.6.27-1.el6    installed
MySQL-devel.x86_64    5.6.27-1.el6    installed
MySQL-server.x86_64   5.6.27-1.el6    installed
[root@localhost usr]#

[root@localhost usr]# yum list installed mysql*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.yun-idc.com
 * extras: mirror.neu.edu.cn
 * updates: mirrors.yun-idc.com
Installed Packages
MySQL-client.x86_64   5.6.27-1.el6    installed
MySQL-devel.x86_64    5.6.27-1.el6    installed
MySQL-server.x86_64   5.6.27-1.el6    installed
[root@localhost usr]#

方式2( -i  :不区分大小写)：

[root@localhost usr]# rpm -qa | grep -i mysql
MySQL-server-5.6.27-1.el6.x86_64
MySQL-client-5.6.27-1.el6.x86_64
MySQL-devel-5.6.27-1.el6.x86_64
[root@localhost usr]#

[root@localhost usr]# rpm -qa | grep -i mysql
MySQL-server-5.6.27-1.el6.x86_64
MySQL-client-5.6.27-1.el6.x86_64
MySQL-devel-5.6.27-1.el6.x86_64
[root@localhost usr]# 

2：卸载MySQL:

卸载1：

[root@localhost usr]# yum remove mysql mysql-server mysql-libs compat-mysql51
[root@localhost usr]# rm -rf /var/lib/mysql
[root@localhost usr]# rm /etc/my.cnf

[root@localhost usr]# yum remove mysql mysql-server mysql-libs compat-mysql51
[root@localhost usr]# rm -rf /var/lib/mysql
[root@localhost usr]# rm /etc/my.cnf

如果装了mysql-devel(其他一样add command)，卸载为：

[root@Tony_ts_tian init.d]# yum remove mysql mysql-devel mysql-server mysql-libs compat-mysql51

[root@Tony_ts_tian init.d]# yum remove mysql mysql-devel mysql-server mysql-libs compat-mysql51

注（例如）:

mysql-5.5.39-1.el6.remi.x86_64
mysql-libs-5.5.39-1.el6.remi.x86_64
compat-mysql51-5.1.54-1.el6.remi.x86_64
mysql-server-5.5.39-1.el6.remi.x86_64
卸载2{继续，1，2选择一种（此处为介绍）：}:

[root@localhost mysql]# rpm -aq | grep -i mysql
MySQL-server-5.6.27-1.el6.x86_64
MySQL-client-5.6.27-1.el6.x86_64
MySQL-devel-5.6.27-1.el6.x86_64
[root@localhost mysql]# rpm -e MySQL-server-5.6.27-1.el6.x86_64
[root@localhost mysql]# rpm -e MySQL-client-5.6.27-1.el6.x86_64
[root@localhost mysql]# rpm -e MySQL-devel-5.6.27-1.el6.x86_64
[root@localhost rc.d]# cd /var/lib/
[root@localhost lib]# rm -rf mysql/

[root@localhost mysql]# rpm -aq | grep -i mysql
MySQL-server-5.6.27-1.el6.x86_64
MySQL-client-5.6.27-1.el6.x86_64
MySQL-devel-5.6.27-1.el6.x86_64
[root@localhost mysql]# rpm -e MySQL-server-5.6.27-1.el6.x86_64
[root@localhost mysql]# rpm -e MySQL-client-5.6.27-1.el6.x86_64
[root@localhost mysql]# rpm -e MySQL-devel-5.6.27-1.el6.x86_64
[root@localhost rc.d]# cd /var/lib/
[root@localhost lib]# rm -rf mysql/

注:删除MySQL数据库目录(关键) ，否则password不更新（默认安装，如果自定义安装路径和链接路径ln -s ……请删除。）
  rm -rf /var/lib/mysql
卸载3：

[root@localhost usr]# whereis mysql
mysql: /usr/lib64/mysql
[root@localhost usr]# rm -rf /usr/lib64/mysql

[root@localhost usr]# whereis mysql
mysql: /usr/lib64/mysql
[root@localhost usr]# rm -rf /usr/lib64/mysql

注：find / -name mysql
注：清空相关mysql的所有目录以及文件和其他配置和设置等。如果有，则删除。也必须考虑其他软件不去影响。
rm -rf /usr/lib/mysql
rm -rf /usr/share/mysql
卸载4：

[root@localhost usr]# rm –rf /usr/my.cnf
[root@localhost usr]# rm -rf /root/.mysql_sercret

[root@localhost usr]# rm –rf /usr/my.cnf
[root@localhost usr]# rm -rf /root/.mysql_sercret 

卸载5（自启服务）：

[root@localhost usr]# chkconfig --list | grep -i mysql
[root@localhost usr]# chkconfig --del mysqld

[root@localhost usr]# chkconfig --list | grep -i mysql
[root@localhost usr]# chkconfig --del mysqld

此处删除看自己设置:mysql/mysqld

此处删除看自己设置:mysql/mysqld