Ubuntu下mysql 修改root密码

mysql 修改root密码

1. 跳过验证

    sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
   
   [mysqld]
   #
   # * Basic Settings
   #
   user            = mysql
   pid-file        = /var/run/mysqld/mysqld.pid
   socket          = /var/run/mysqld/mysqld.sock
   port            = 3306
   basedir         = /usr
   datadir         = /var/lib/mysql
   tmpdir          = /tmp
   lc-messages-dir = /usr/share/mysql
   skip-external-locking
   
   skip-grant-tables
   
   

   在 skip-external-locking 添加skip-grant-tables

2. 重启mysql服务

   sudo systemctl restart mysql
   

3. 设置root密码

   # Mysql连接数据库
   mysql
   # 使用Mysql库
   use mysql
   # 查看root用户是否存在
   select * from user where User='root'\G
   

   设置密码

   update  user set  authentication_string=password('admin') , plugin='mysql_native_password'  where user='root';
   flush privileges;
   

   这里认证要是用 plugin='mysql_native_password'，要不会使用auth_socket认证。(密码登录失败)

4. 讲 /etc/mysql/mysql.conf.d/mysqld.cnf配置的skip-grant-tables注释掉并重启mysql服务

5. 使用密码登录

参考: 解决MySql ERROR 1698 (28000) 错误：Access denied for user ‘root‘@‘localhost‘