centos 安装mysql

　　

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

mysql -u root
set password =password('你的密码');

　　

忘记密码

vim /etc/my.cnf

mysqld添加
skip-grant-tables

mysql -u root

use mysql 

update user set authentication_string = PASSWORD('123') where User='root'

flush privileges

quit

service mysqld restart