1. 下载mysql的repo源

$ wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

 

2. 安装mysql-community-release-el7-5.noarch.rpm包

$ sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm

 

3. 安装mysql

$ sudo yum install mysql-server

问题1：

[wzh@centos-oracle ~]$ mysql -u root

mysqladmin: connect to server at 'localhost' failed

error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'

Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!

[wzh@centos-oracle ~]$

【解决方法】

sudo chown -R wzh:wzh /var/lib/mysql

service mysqld restart

问题2

[wzh@centos-oracle ~]$ mysql -u root

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

【解决方法】

vi /etc/my.cnf

在mysqld下面添加skip-grant-tables

service mysqld restart

--

use mysql;

update user set password=password("mysql") where user="root";

flush privileges;

--密码重设置成功，改好之后，再修改一下my.ini这个文件，把我们刚才加入的"skip-grant-tables"这行删除，保存退出再重启mysql服务就可以了。