1.下载（国内镜像，比搜狐的快一点）：http://mirrors.ustc.edu.cn/mysql-ftp/Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
2.依赖
yum install libaio
3.
groupadd mysql useradd -r -g mysql -s /bin/false mysql cd /usr/local tar zxvf /path/to/mysql-VERSION-OS.tar.gz ln -s full-path-to-mysql-VERSION-OS mysql cd mysql scripts/mysql_install_db --user=mysql bin/mysqld_safe --user=mysql &
#回车cp support-files/mysql.server /etc/init.d/mysql.server
4. 加入skip-grant-tables（跳过权限）
vi /etc/my.cnf [mysqld] skip-grant-tables
5.启动服务
systemctl start mysql
6.
mysql -u root -p
无密码，直接回车
7.修改密码
use mysql; update mysql.user set authentication_string=password('123456') where User='root' and Host='localhost';
8.设置密码不过期，不然没法登陆
update user set password_expired='N' where user='root'; flush privileges;
9.退出后在，/etc/my.cnf中 将权限过滤的那条删除（注释）
#删除skip-grant-tables
#skip-grant-tables
10.重启mysql服务
systemctl restart mysql
11.登陆后启动远程访问
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;