錯誤1045（28000）：拒絕訪問用戶'root'@'localhost'（使用密碼：是）-Ubuntu

Question

我無法登錄到MySQL。我認爲這是錯誤的密碼，我試圖更改密碼..

它沒有必要更改密碼。因爲密碼正確的是。密碼是正確的，但我仍然無法登錄MySQL。爲什麼？請幫助我，謝謝。我嘗試了很多方法。

root@PC:/home/PC# sudo /etc/init.d/mysql stop 
Rather than invoking init scripts through /etc/init.d, use the service(8) 
utility, e.g. service mysql stop 

Since the script you are attempting to invoke has been converted to an 
Upstart job, you may also use the stop(8) utility, e.g. stop mysql 
mysql stop/waiting 
root@PC:/home/PC# pkill -9 mysql 
root@PC:/home/PC# pkill -9 mysqld 
root@PC:/home/PC# pkill -9 mysqld_safe 
root@PC:/home/PC# ps -ef |grep mysql 
root 27690 25962 0 19:51 pts/1 00:00:00 grep --color=auto mysql 
root@PC:/home/PC# kill 27690 
bash: kill: (27690) - No such process 
root@PC:/home/PC# kill 25962 
root@PC:/home/PC# ps uaxww | grep -i mysql 
PC 24175 0.7 3.8 818760 156020 ? Sl 19:29 0:10 /usr/lib/firefox/firefox /media/DA94-D856/c/How to Recover_Reset forgotten MySQL root Password on Linux _ 2daygeek.htm 
root 27695 0.0 0.0 13588 944 pts/1 S+ 19:52 0:00 grep --color=auto -i mysql 
root@PC:/home/PC# kill 27695 
bash: kill: (27695) - No such process 
root@PC:/home/PC# kill 13588 
bash: kill: (13588) - No such process 
root@PC:/home/PC# sudo mysqld_safe --skip-grant-tables & 
[1] 27701 
root@PC:/home/PC# 160518 19:53:57 mysqld_safe Can't log to error log and syslog at the same time. Remove all --log-error configuration options for --syslog to take effect. 
160518 19:53:57 mysqld_safe Logging to '/var/log/mysql/error.log'. 
160518 19:53:57 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 
root@PC:/home/PC# mysql -uroot 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 1 
Server version: 5.5.34-0ubuntu0.12.04.1 (Ubuntu) 

Copyright (c) 2000, 2013, 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> use mysql; 
Reading table information for completion of table and column names 
You can turn off this feature to get a quicker startup with -A 

Database changed 
mysql> update user set password=PASSWORD("mypw") where User='root'; 
Query OK, 0 rows affected (0.00 sec) 
Rows matched: 3 Changed: 0 Warnings: 0 

mysql> update user set password=PASSWORD("newpw") where User='root'; 
Query OK, 3 rows affected (0.00 sec) 
Rows matched: 3 Changed: 3 Warnings: 0 

mysql> flush privileges; 
Query OK, 0 rows affected (0.00 sec) 

mysql> quit 
Bye 
root@PC:/home/PC# sudo /etc/init.d/mysql stop 
Rather than invoking init scripts through /etc/init.d, use the service(8) 
utility, e.g. service mysql stop 

Since the script you are attempting to invoke has been converted to an 
Upstart job, you may also use the stop(8) utility, e.g. stop mysql 
root@PC:/home/PC# sudo /etc/init.d/mysql start 
Rather than invoking init scripts through /etc/init.d, use the service(8) 
utility, e.g. service mysql start 

Since the script you are attempting to invoke has been converted to an 
Upstart job, you may also use the start(8) utility, e.g. start mysql 
mysql start/running, process 28137 
root@PC:/home/PC# mysql -u root -p 
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 

（或參閱dpkg-重新配置的MySQL服務器-5.5）

PC@PC:~$ sudo dpkg-reconfigure mysql-server-5.5 
[sudo] password for PC: 
mysql stop/waiting 
160513 7:09:38 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead. 
mysql start/running, process 4046 
PC@PC:~$ mysql -u root -p 
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 
PC@PC:~$ 
sudo /etc/init.d/mysql stop 
sudo mysqld_safe --skip-grant-tables & 
mysql -uroot 
use mysql; 
update user set password=PASSWORD("newpw") where User='root'; 
flush privileges; 
quit 
sudo /etc/init.d/mysql stop 
sudo /etc/init.d/mysql start 

錯誤日誌http://pastebin.com/HN2tGhJJ

等/ mysql /下my.cf http://pastebin.com/cMSdGUei

我嘗試過，但它沒有發生。根特權可能已被刪除。 使用mysql; 全部授予。 'root'@'localhost';;

[sudo] password for PC-2: 
root@PC-2:/home/PC-2# mysql -u root -pFalanca_mypw 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 
root@PC-2:/home/PC-2# grep password /etc/mysql/debian.cnf 
password = vwSY1PE7GgDRUbB7 
password = vwSY1PE7GgDRUbB7 
root@PC-2:/home/PC-2# mysql -u debian-sys-maint -p 
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 71 
Server version: 5.5.34-0ubuntu0.12.04.1 (Ubuntu) 

Copyright (c) 2000, 2013, 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> use mysql; 
Reading table information for completion of table and column names 
You can turn off this feature to get a quicker startup with -A 

Database changed 
mysql> grant all on *.* to 'root'@'localhost'; 
ERROR 1045 (28000): Access denied for user 'debian-sys-maint'@'localhost' (using password: YES) 

Answer 1

在配置（.CNF）的MySQL的文件，設置以下屬性，

bind-address = 0.0.0.0 

的默認值是127.0.0.1。將其更改爲0.0.0.0，您將可以訪問它。 Otheriwse，它只允許通過ssh通過本地主機。