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在ubuntu中如何重置mysql服务器的root密码_MySQL

WBOY
WBOYOriginal
2016-06-01 13:48:14872browse

Ubuntu

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在ubuntu下安装了mysql 5 server,结果不知道什么原因,安装时输入的root帐号密码在使用时无论如何都不能通过数据库服务器的验证。无奈只有重置mysql的root帐号密码。查了一下,用了以下方法成功的重置了root帐号密码。

首先停止mysql服务:

root@webserver:/home/webmaster# service mysql stop

接着采用忽略密码认证模式重新创建一个mysql服务:

root@webserver:/home/webmaster# mysqld --user=mysql --skip-grant-tables --skip-networking &

成功启动后返回PID及其它启动信息:

 1 [1] 3591 2 root@webserver:/home/webmaster# 121005  2:59:27 [Note] Plugin 'FEDERATED' is disabled. 3 121005  2:59:27 InnoDB: The InnoDB memory heap is disabled 4 121005  2:59:27 InnoDB: Mutexes and rw_locks use GCC atomic builtins 5 121005  2:59:27 InnoDB: Compressed tables use zlib 1.2.3.4 6 121005  2:59:27 InnoDB: Initializing buffer pool, size = 128.0M 7 121005  2:59:27 InnoDB: Completed initialization of buffer pool 8 121005  2:59:27 InnoDB: highest supported file format is Barracuda. 9 121005  2:59:27  InnoDB: Waiting for the background threads to start10 121005  2:59:28 InnoDB: 1.1.8 started; log sequence number 159568511 121005  2:59:28 [Note] mysqld: ready for connections.12 Version: '5.5.24-0ubuntu0.12.04.1'  socket: '/var/run/mysqld/mysqld.sock'  port: 0  (Ubuntu)

连接到mysql系统库:

root@webserver:/home/webmaster# mysql -u root mysql

连接到mysql库后直接修改root帐号的密码为新的密码'mynewpasswd' :

Type 'help;' or '/h' for help. Type '/c' to clear the current input statement.mysql> update user set Password=PASSWORD('mynewpasswd') where user='root';Query OK, 3 rows affected (0.00 sec)Rows matched: 3  Changed: 3  Warnings: 0mysql> FLUSH PRIVILEGES;mysql> quit;Bye

中止mysql服务进程(PID 3591见前面启动服务时的屏幕信息):

root@webserver:/home/webmaster# kill 3591

正常启动 mysql服务,并用新密码登录mysql服务器成功:

root@webserver:/home/webmaster#service mysql startroot@webserver:/home/webmaster#mysql -u root -pmynewpasswd 
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