配置mysql密码出现错误解决方案

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

[root@twinkle ~]# /etc/init.d/mysqld stop
Stopping MySQL: [ OK ]
[root@twinkle ~]# mysqld_safe --skip-grant-tables &
[1] 13694
[root@twinkle ~]# Starting mysqld daemon with databases from /var/lib/mysql

[root@twinkle ~]# mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.0.77 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> update user set password=PASSWORD("testpass") where User='root';
ERROR 1046 (3D000): No database selected
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.13 sec
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> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| func |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| proc |
| procs_priv |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+17 rows in set (0.00 sec)
mysql> update user set password=PASSWORD("testpass") where User='root';
Query OK, 3 rows affected (0.05 sec)Rows matched: 3 Changed: 3 Warnings: 0
mysql> flush privileges; Query OK, 0 rows affected (0.04 sec)mysql> quit
Bye
[root@twinkle ~]# /etc/init.d/mysql restart
bash: /etc/init.d/mysql: No such file or directory[root@twinkle ~]# /etc/init.d/mysqld restart
STOPPING server from pid file /var/run/mysqld/mysqld.pid101120 04:17:15 mysqld endedStopping MySQL: [ OK ]Starting MySQL: [ OK ][1]+ Done mysqld_safe --skip-grant-tables
[root@twinkle ~]# mysql -u root -pEnter password: Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 2Server version: 5.0.77 Source distributionType 'help;' or '\h' for help. Type '\c' to clear the buffer.mysql> quitBye[root@twinkle ~]#