linux中忘记了mysql的root用户的密码怎么办？

1.vim /etc/my.cnf
skip-grant-tables  #取消此行的注释

2.重启mysql
systemctl restart mysqld

3.mysql 登陆mysql
mysql> use mysql;
mysql> UPDATE user SET Password = password ( '123456' ) WHERE User = 'root' ;
mysql> flush privileges ;
mysql> quit

4.恢复配置文件my.cnf
vim /etc/my.cnf
[mysqld]
skip-grant-tables ##去掉此行，继续校验权限表，

5.重启mysql
systemctl restart mysqld