centos 6.2 Mysql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] #

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] #

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

?

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

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/

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

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

卸载5（自启服务）：

[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

疑难解答：

GPG key retrieval failed: [Errno 14] Could not open/read file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

第一种是把这个key从这个源站copy过来，放到/etc/pki/rpm-gpg目录下

第二种是修改repo文件

vim /etc/yum.repos.d/epel.repo
[epel]
name=Extra Packages for Enterprise Linux 6 – $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

把gpgcheck=1改为gpgcheck=0