Mysql 5.7 远程连接出错

centos7 上安装mysql5.7后登录报错ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using pas

安装完mysql后会有个临时密码去日志查看，但是查看登录修改密后还是不行

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password:yes)

于是

1，停止mysql服务

systemctl stop mysqld.service

2，修改配置文件无密码登录

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1. vi /etc/my.cnf 

在最尾部加上

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1. skip-grant-tables 

保存

3，启动mysql

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1. systemctl start mysqld.service 

4，登录musql

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1. mysql -u root 

此处注意不要加-p

5,修改密码，mysql5.7用此语法

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1. use mysql ; 

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1. update mysql.user set authentication_string=password('123456') where user='root' ; 

6,回到第二步骤去掉加上的

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1. skip-grant-tables 

保存 重启mysql就ok了

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其实默认安装完了mysql后或在日志中生成一个默认的密码 /var/log/mysqld.log 中

拿到默认密码后登录mysql  进行密码重新设置

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1. set passwprd=password('you password')； 

如果密码级别与默认的级别要求不符时候会报

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1. Your password does not satisfy the current policy requirements 

此时需要修改级别与最小的默认密码位数

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1. set global validate_password_policy=0; 
2. set global validate_password_length=4; 

然后在进行设置密码就好了

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远程连接时1130错误

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1. mysql;use mysql;   
2. mysql;select 'host' from user where user='root';   
3. mysql;update user set host = '%' where user ='root';   
4. mysql;flush privileges;   
5. mysql;select 'host'   from user where user='root';