[root@localhost ~]# mysql -uroot -pERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

[root@localhost ~]# mysql -uroot -pERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

[root@localhost ~]# service mysqld stopStopping mysqld:                      [ OK ]

skip-grant-tables  //跳過授權直接進入數據庫

[root@localhost ~]# service mysqld start[root@localhost ~]# mysql -uroot -p  mysql> 

mysql> use mysql //密碼存放在MySQL中，需要進入mysql> desc user; //查看user表中的字段密碼一般存在password表中+------------------------+-----------------------------------+------+-----+-----------------------+-------+| Field     | Type        | Null | Key | Default    | Extra |+------------------------+-----------------------------------+------+-----+-----------------------+-------+| Host     | char(60)       | NO | PRI |      |  || User     | char(16)       | NO | PRI |      |  || Password    | char(41)       | NO |  |      |  |mysql> update user set password=password('passw0rd') where user="root"; //設置密碼為passw0rdmysql> flush privileges; //刷新

[root@localhost ~]# mysql -uroot -ppassw0rdmysql>