mysql 忘记密码怎么办？lunix系统安装

mysql -u root 错误提示：ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: NO) 登录root帐号需要密码，就是忘记密码的操作了。

1.在/etc/my.cnf文件中添加skip-grant-tables。

2.重启mysql，service mysqld restart

3.登录mysql，# mysql -u root

4.修改密码，

mysql>use mysql;
mysql>update mysql.user set authentication_string=password('密码') where user='root';
mysql>flush privileges;
mysql>exit;

5.恢复/etc/my.cnf，将skip-grant-tables删除或者注释掉。

6.重启mysql，service mysqld restart

ok

mysql 5.7 [Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonag

1.找到/etc/my.cnf 文件增加以下代码

[mysqld]
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

2.重启mysql

service mysql restart

3.设置

mysql > SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

ok