[root@wyt1 ~]# vim /etc/my.cnf
[root@wyt1 ~]# cat /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql
datadir = /opt/mysqldata
socket = /tmp/mysql.sock
port = 3306
pid-file = /opt/mysqldata/mysql.pid
user = mysql
skip-name-resolve
skip-grant-tables
2.重启数据库
[root@wyt1 ~]# service mysqld restart
Shutting down MySQL.... SUCCESS!
Starting MySQL. SUCCESS!
3.登录数据库
[root@wyt1 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.30 MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
4.修改密码
mysql> use mysql;
mysql> select * from user\G;
mysql> update user set authentication_string = password('123456') where User= 'root';
Query OK, 2 rows affected, 1 warning (0.00 sec)
Rows matched: 2 Changed: 2 Warnings: 1
5.把配置文件还原
[root@wyt1 ~]# vim /etc/my.cnf
[root@wyt1 ~]# cat /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql
datadir = /opt/mysqldata
socket = /tmp/mysql.sock
port = 3306
pid-file = /opt/mysqldata/mysql.pid
user = mysql
skip-name-resolve
6.重启数据库
[root@wyt1 ~]# service mysqld restart
Shutting down MySQL.... SUCCESS!
Starting MySQL. SUCCESS!