2020-12-03

mysql重设密码及允许远程访问

一.重设密码

1.知道原来的myql的root的密码

方法一:

通过登录mysql系统,mysql -uroot -pEnter password: 【输入原来的密码】mysql>use mysql;mysql> update user set authentication_string=passworD("test123") wher user='root';mysql> flush privileges;mysql> exit; 

方法二:

在mysql系统外,使用mysqladminmysqladmin -u root -p password "test123"Enter password: 【输入原来的密码】

2.不知道原来的myql的root的密码

①.跳过密码启动

mysqld_safe --skip-grant-tables &

②.重设密码

# 直接输入mysql,进入mysqlmysqlmysql> use mysql;mysql> UPDATE user SET authentication_string=password("test123") WHERE user='root'; mysql> flush privileges;mysql> exit;  

③.重新启动mysql

systemctl restart mysql

二.允许外部访问

1.设置允许访问

# password是数据库密码GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;FLUSH PRIVILEGES;

2.使用navicat检测一下,如果还是不能连接,可能是防火墙限制了。需要在防火墙里面加开放数据库端口的规则。先查看一下目前的防火墙,此时没有放开3306端口!

firewall-cmd --list-all

[root@iZhp3di673f3rx1g5d9dfdZ soft]# firewall-cmd --list-all public target: default icmp-block-inversion: no interfaces: sources: services: dhcpv6-client ssh ports: 20/tcp 21/tcp 22/tcp 80/tcp 8888/tcp 39000-40000/tcp protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: 

3.开放3306端口

firewall-cmd --permanent --add-port=3306/tcp

4.重启防火墙

service firewalld restart

5.查看3306端口是否开放

firewall-cmd --query-port=3306/tcp

[root@iZhp3di673f3rx1g5d9dfdZ soft]# firewall-cmd --query-port=3306/tcpyes

6.再次查看现在防火墙

firewall-cmd --list-all

[root@iZhp3di673f3rx1g5d9dfdZ soft]# firewall-cmd --list-all public target: default icmp-block-inversion: no interfaces: sources: services: dhcpv6-client ssh ports: 20/tcp 21/tcp 22/tcp 80/tcp 8888/tcp 39000-40000/tcp 3306/tcp protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: 

7.此时就可以远程连接了

站在巨人肩膀上摘苹果

https://blog.csdn.net/qq_35070711/article/details/70860014

https://www.cnblogs.com/yybrhr/p/9810375.html









原文转载:http://www.shaoqun.com/a/494800.html

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​一.重设密码1.知道原来的myql的root的密码方法一:通过登录mysql系统,mysql-uroot-pEnterpassword:【输入原来的密码】mysql>usemysql;mysql>updateusersetauthentication_string=passworD("test123")wheruser='root';mysql&g
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