一、安装配置：
yum -y install mysql-community-server
cat /var/log/mysqld.log|grep password #找到root初始登录密码，
mysql -uroot -p' zh,Abs8K9p>Y'
grep temporary /var/log/mysqld.log #搜索root初始登录密码
vim /etc/my.cnf 添加skip_grant-tables 跳过登录鉴权
set global validate_password_policy=0; #更改密码策略
alter user 'root'@'localhost' identified by '123456'; #更改root账户密码
#mysq时间配置
log_timestamps=SYSTEM
