cenos7安装mysql5.7服务

1.下载并安装MySQL官方的 Yum Repository

[root@localhost ~]# wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
[root@localhost ~]# yum -y install mysql57-community-release-el7-10.noarch.rpm
[root@localhost ~]# yum -y install mysql-community-server

2.启动和重设密码

# 启动服务
[root@localhost ~]# systemctl start  mysqld.service
# 查看服务状态
[root@localhost ~]# systemctl status mysqld.service
# 查看默认随机密码
[root@localhost ~]# grep "password" /var/log/mysqld.log

# 登录数据库
# 注意：重设密码时，默认密码规则（要求密码至少包含一个大写字母，一个小写字母，一位数字和一个特殊字符，并且密码总长度至少为8个字符）
[root@localhost ~]# mysql -uroot -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';

# mysql默认只能本机登录，通过以下命令，设置允许远程登录：
mysql> GRANT ALL PRIVILEGES ON *.* TO 'your username'@'%' IDENTIFIED BY 'new password' WITH GRANT OPTION;

参考博客地址：

1. https://www.cnblogs.com/porotin/p/9045391.html
2. https://www.cnblogs.com/alan-lin/p/12017068.html