1、cd /tmp
如果是linux5版本的：
# CentOS 5.x
wget http://mirrors.163.com/.help/CentOS5-Base-163.repo
如果是linux6版本的：
# CentOS 6.x
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
下载好之后就会在/tmp下有一个CentOS*-Base-163.repo的文件执行下面操作：
2、接下来执行|yum clean allyum makecache然后执行下面的命令安装mysql：
3、最后就是享受你的mysql带来的乐趣：
[root@db02 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 728
Server version: 5.7.9-log Source distribution
Copyright (c) 2000, 2015, 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> show databases;
+--------------------+
| Database |
