centos 7下安装mysql 5.7.21

1、首先查看系统有没有安装mysql

[root@proxysql ~]# rpm -qa|grep mysql
[root@proxysql ~]# 

结果发现没有，那么我们先下载mysql得rpm包

 2、首先下载server

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-server-5.7.21-1.el7.x86_64.rpm

 3、然后下载client

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-client-5.7.21-1.el7.x86_64.rpm

 4、先安装server

# rpm -ivh mysql-community-server-5.7.21-1.el7.x86_64.rpm --nodeps --force

 5、后安装client

# rpm -ivh mysql-community-client-5.7.21-1.el7.x86_64.rpm --nodeps

 6、启动mysql服务

# service mysqld start

 7、获取临时密码

# grep 'temporary password' /var/log/mysqld.log

 8、使用临时密码进入mysql修改密码

在/etc/my.cnf的[mysqld]下添加一行如下代码后重启mysql

skip-grant-tables

 然后再使用刚才得临时密码进入mysql修改root密码

mysql> update mysql.user set authentication_string=password('!QAZ2wsx#EDC') where user='root' and Host = 'localhost';

 然后再把my.cnf文件下刚刚添加得那行代码删除，重新启动mysql（service mysqld restart）。

再次执行：

SET PASSWORD = PASSWORD('!QAZ2wsx#EDC');

 9、设置开机自动重启

# systemctl enable mysqld
# systemctl daemon-reload

 CentOS7 yum方式安装MySQL5.7

参考网址：https://www.cnblogs.com/luohanguo/p/9045391.html