安装MySQL5.7

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql-community-server

开启MySQL服务

开启MySQL服务

systemctl start mysqld

查看MySQL状态

systemctl status mysqld

登陆MySQL

查看原始密码

grep "password" /var/log/mysqld.log

登陆

mysql -uroot -p

修改新密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';

允许root远程连接(不推荐)

use mysql;
UPDATE user SET Host='%' WHERE User='root';
flush privileges;

设置允许远程连接的账号（推荐）

GRANT ALL PRIVILEGES ON *.* TO '用户名'@'%' IDENTIFIED BY '密码' WITH GRANT OPTION;

修改默认编码格式

vim /etc/my.cnf
添加以下内容

[mysqld]
character-set-server=utf8
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

重启MySQL
systemctl restart mysqld
查看编码格式

mysql> show variables like 'character%';

MySQL开启备份

MySQL5.7 — mysqldump 备份与恢复