mysql基础1：yum安装mysql

1.下载yum源并安装http://dev.mysql.com/downloads/repo/yum/.
wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
yum install -y mysql57-community-release-el7-11.noarch.rpm

2.查看yum源mysql信息
yum repolist all|grep mysql
默认启用的是5.7的源，如果要安装其他版本，需要修改/etc/yum.repos.d/mysql-community.repo

3.安装
yum install mysql-community-server

4.启动
EL6 service mysqld start
EL7 systemctl start mysqld.service

5.查看
EL6 service mysqld status
EL7 systemctl status mysqld.service

6.密码
5.6是没有密码的
5.7的密码保存在日志中，grep 'temporary password' /var/log/mysqld.log

7.更改密码
ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';

以上，来自https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/