Error: & #39; Accessdeniedforuser & #39; root & #39

Linux operation is as follows: [root @ localhostmysql] # mysqladmin-h127.0.0.1-urootpasswordroot123mysqladmin: connecttoserverat127.0.0.1failederror: Accessdeniedforuserroot @ localhost (usingpassword: NO) [root @ localhostmysql] # output

On linux, perform the following operations: [root @ localhost mysql] # mysqladmin-h 127.0.0.1-u root password root123mysqladmin: connect to server at '100. 0.0.1 'failederror: 'Access denied for user' root' @ 'localhost' (using password: NO) '[root @ localhost mysql] # output

Perform the following operations on linux:

[root@localhost mysql]# mysqladmin -h 127.0.0.1 -u root password "root123"mysqladmin: connect to server at '127.0.0.1' failederror: 'Access denied for user 'root'@'localhost' (using password: NO)'[root@localhost mysql]#

The above error is returned.

Solution:

[root@localhost mysql]# service mysql stopShutting down MySQL..                                      [  OK  ][root@localhost mysql]#[root@localhost mysql]#[root@localhost mysql]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &[1] 30750[root@localhost mysql]# 130606 13:10:20 mysqld_safe Logging to '/var/lib/mysql/localhost.localdomain.err'.130606 13:10:21 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql[root@localhost mysql]#[root@localhost mysql]# mysql -u root mysqlReading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -AWelcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 1Server version: 5.6.12 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 itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> UPDATE user SET Password=PASSWORD('root123') where USER='root';Query OK, 4 rows affected (0.16 sec)Rows matched: 4  Changed: 4  Warnings: 0mysql> FLUSH PRIVILEGES;Query OK, 0 rows affected (0.00 sec)mysql> quitBye[root@localhost mysql]# service mysql startStarting MySQL                                             [  OK  ][root@localhost mysql]# mysql -u rootERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)[root@localhost mysql]# mysql -u root -pEnter password:Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 3Server version: 5.6.12Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show databases;ERROR 1820 (HY000): You must SET PASSWORD before executing this statementmysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('root123');Query OK, 0 rows affected (0.00 sec)mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || mysql              || performance_schema || test               |+--------------------+4 rows in set (0.00 sec)mysql>