failed: Access denied for user 'root'@'localhost' (using password: YES) at /usr/bin/innobackupex lin

[root@t1 /]#   span >

InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona LLC and/or its affiliates 2009-2013.  All Rights Reserved.


This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.


Get the latest version of Percona XtraBackup, documentation, and help resources:
http://www.percona.com/xb/p


160309 07:09:49  innobackupex: Executing a version check against the server...
160309 07:09:49  innobackupex: Connecting to MySQL server with DSN dbi:mysql:;mysql_read_default_group=xtrabackup as root  (using password: YES).
innobackupex: got a fatal error with the following stacktrace: at /usr/bin/innobackupex line 3011
main::mysql_connect(abort_on_error, 1) called at /usr/bin/innobackupex line 1551
innobackupex: Error: Failed to connect to MySQL server: DBI connect(;mysql_read_default_group=xtrabackup,root,...) failed: Access denied for user root@localhost (using password: YES) at /usr/bin/innobackupex line 2995
160309 07:09:49  innobackupex: Connecting to MySQL server with DSN dbi:mysql:;mysql_read_default_group=xtrabackup as root  (using password: YES).
innobackupex: got a fatal error with the following stacktrace: at /usr/bin/innobackupex line 3011
main::mysql_connect(abort_on_error, 1) called at /usr/bin/innobackupex line 1570
innobackupex: Error: Failed to connect to MySQL server: DBI connect(;mysql_read_default_group=xtrabackup,root,...) failed: Access denied for user root@localhost (using password: YES) at /usr/bin/innobackupex line 2995

[root@t1 /]#  mysqladmin -uroot -p password jsb

Enter password: 
mysqladmin: connect to server at localhost failed

error: Access denied for user root@localhost (using password: YES)

解决：

[root@t1 /]# /etc/init.d/mysql stop
-bash: /etc/init.d/mysql: No such file or directory
[root@t1 /]# /etc/init.d/mysqld stop
Shutting down MySQL.... SUCCESS! 
[root@t1 /]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking
[1] 12693
[root@t1 /]# 160309 07:11:26 mysqld_safe Logging to /mydata/data/t1.err.
160309 07:11:26 mysqld_safe Starting mysqld daemon with databases from /mydata/data


[root@t1 /]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A


Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.10-log MySQL Community Server (GPL)


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 UPDATE user SET Password=PASSWORD(jsb) where USER=root;
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4  Changed: 4  Warnings: 0


mysql FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)


mysql quit
Bye

[root@t1 /]# /etc/init.d/mysqld restart

Shutting down MySQL..160309 07:12:49 mysqld_safe mysqld from pid file /mydata/data/t1.pid ended
 SUCCESS! 
Starting MySQL. SUCCESS! 
[1]+  Done                    mysqld_safe --user=mysql --skip-grant-tables --skip-networking
[root@t1 /]# mysql -uroot -pjsb
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.10-log MySQL Community Server (GPL)


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 exit
Bye



MySQL 8.0 Access denied for user root @ localhost (using password: YES) 问题解决 在网上看到有许多此类问题的解决办法，但因版本的不一致导致同一种问题有人可以解决有人不可以解决。在这我给出一种针对当下最新8.0版本的解决办法，本人亲测可行。当然此方法也可用于忘记密码后重置密码。方法步骤：一、启动服务器后，运行 mysqld --console --skip-grant-tabl.
初次安装mysql，net start mysql,然后输入mysql -u root -p, 出现enter password,我直接点击回车，结果出现如果下错误： ERROR 1045 (28000): Access denied for user root @ localhost (using password: NO)。