Centos 7 安装mysql数据库

1. 查看Linux版本

   [root@localhost ~]# cat /etc/redhat-release
   CentOS Linux release 7.1.1503 (Core)

2. 因为Centos7 里面没有MysqL的yum源，重新下载建立yum源，然后创建MysqL数据库

   [root@localhost ~]# wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

   [root@localhost ~]# rpm -ivh MysqL-community-release-el7-5.noarch.rpm

   [root@localhost ~]# yum install MysqL-server

3. 登录数据库

   [root@localhost opt]# MysqL -u root
   ERROR 2002 (HY000): Can’t connect to local MysqL server through socket ‘/var/lib/MysqL/MysqL.sock’ (2)

   注意:/var/lib/MysqL的访问权限问题，将该文件夹的所有者改为root用户

   [root@localhost opt]# chown -R root:root /var/lib/MysqL

4. 重启MysqLd 服务

   [root@localhost opt]# service MysqLd restart

5. 重新登录MysqL库

   [root@localhost opt]# MysqL -u root
   Welcome to the MysqL monitor. Commands end with ; or \g.
   Your MysqL connection id is 2
   Server version: 5.6.34 MysqL Community Server (GPL)

   copyright (c) 2000,2016,Oracle and/or its affiliates. All rights reserved.

   Oracle is a registered Trademark of Oracle Corporation and/or its
   affiliates. Other names may be Trademarks of their respective
   owners.

   Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.

   MysqL> use MysqL

   MysqL> update user set password=password(“123456”) where user=’root’;
   Query OK,4 rows affected (0.15 sec)
   Rows matched: 4 Changed: 4 Warnings: 0

   MysqL> exit
   Bye
   [root@localhost opt]#

6. 修改防火墙配置