centos7安装mysql5.x

1.rpm -qa | grep mysql

qt-mysql-4.8.5-11.el7.x86_64
pcp-pmda-mysql-3.10.6-2.el7.x86_64

akonadi-mysql-1.9.2-4.el7.x86_64

2.卸载上面三个包

     rpm  -e   akonadi-mysql

     rpm  -e  qt-mysql
     rpm  -e   pcp-pmda-mysql

   强制卸载，添加--nodeps

    例如:  rpm -e --nodeps  akonadi-mysql

3 rpm -qa | grep mariadb

#列出所有被安装的rpm package

4.删除所有第三步列出的包

  

5.CentOS 7的yum源中貌似没有正常安装mysql时的mysql-sever文件，需要去官网上下载

# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
# rpm -ivh mysql-community-release-el7-5.noarch.rpm
# yum install mysql-community-server

成功安装之后重启mysql服务

# service mysqld restart

初次安装mysql是root账户是没有密码的

设置密码的方法

# mysql -uroot
mysql> set password for ‘root’@‘localhost’ = password('root');
mysql> exit

6.报错信息

Error downloading packages:
  mysql-community-libs-5.6.30-2.el7.x86_64: [Errno 256] No more mirrors to try.

 yum list  | grep mysql

mysql-community-embedded-devel.i686     5.6.30-2.el7                   mysql56-community
mysql-community-embedded-devel.x86_64   5.6.30-2.el7                   mysql56-community
mysql-community-libs.i686               5.6.30-2.el7                   mysql56-community
mysql-community-libs.x86_64             5.6.30-2.el7                   mysql56-community
mysql-community-server.x86_64           5.6.30-2.el7                   mysql56-community
mysql-community-test.x86_64             5.6.30-2.el7                   mysql56-community

 yum install mysql-community-libs.x86_64