1. 问题描述
我们假设你已在ubuntu下成功安装上了mysql数据库。
启动ubuntu14.10系统后, ctrl + alt + t打开终端
首先进入mysql的安装目录下启动mysql服务:
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xx@ubuntu:~$ cd /usr/local/mysql/
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xx@ubuntu:/usr/local/mysql$ sudo ./support-files/mysql.server start
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Starting MySQL
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.. *
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xx@ubuntu:/usr/local/mysql$
启动mysql服务后, 接着我们进入mysql的shell, 即进入mysql的控制台,
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xx@ubuntu:/usr/local/mysql$ mysql -u root mysql
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ERROR 1045 (28000): Access denied for user 'xx'@'localhost' (using password: NO)
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xx@ubuntu:/usr/local/mysql$
发现出现拒绝访问“ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)”信息。
回到上面, 我们在刚刚安装完mysql数据库是未对mysql中的root用户进行密码设置的。下面我们通过修改mysql中的root用户密码进行解决问题。
2. 解决方法
我们先把mysql的服务停止下来
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xx@ubuntu:/usr/local/mysql$ sudo ./support-files/mysql.server stop
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Shutting down MySQL
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.. *
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xx@ubuntu:/usr/local/mysql$
mysql服务停止后, 执行以下命令, 这里我们sudo -s切换到root管理员下执行命令,如下
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./mysqld_safe --user=mysql --skip-grant-tables --skip-networking&
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root@ubuntu:/usr/local/mysql# cd bin/
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root@ubuntu:/usr/local/mysql/bin# ./mysqld_safe --user=mysql --skip-grant-tables --skip-networking&
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[1] 5810
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root@ubuntu:/usr/local/mysql/bin# 150104 19:01:43 mysqld_safe Logging to '/usr/local/mysql/data/ubuntu.err'.
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150104 19:01:43 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data
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150104 19:15:35 mysqld_safe mysqld from pid file /usr/local/mysql/data/ubuntu.pid ended
当出现上面的信息时, 我们再ctrl + alt + t打开另一个终端窗口, 键入mysql -u root mysql进入mysql的shell下, 并可以修改mysql里root用户的密码
如下:
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xx@ubuntu:~$ mysql -u root mysql
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Reading table information for completion of table and column names
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You can turn off this feature to get a quicker startup with -A
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 1
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Server version: 5.7.5-m15 MySQL Community Server (GPL)
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Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
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Oracle is a registered trademark of Oracle Corporation and/or its
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affiliates. Other names may be trademarks of their respective
-
owners.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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mysql> UPDATE user SET Password=PASSWORD('123456') whereUSER='root';
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ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'whereUSER='root'' at line 1
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mysql> use mysql;
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Database changed
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mysql> UPDATE user SET password=PASSWORD('123456') WHERE user='root';
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Query OK, 1 row affected (0.22 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> FLUSH PRIVILEGES;
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Query OK, 0 rows affected (0.03 sec)
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mysql> exit
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Bye
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xx@ubuntu:~$ mysql -uroot -p123456
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mysql: [Warning] Using a password on the command line interface can be insecure.
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 2
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Server version: 5.7.5-m15
-
-
Copyright (c) 2000, 2014, 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.
-
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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mysql> quit
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Bye
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xx@ubuntu:~$
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mysql>use mysql;
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mysql>UPDATE user SET password=PASSWORD('newpassword') WHERE user='root';
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mysql>FLUSH PRIVILEGES;
即上面三个命令就可完成mysql里root用户的密码修改。
3. 再次以新密码进入mysql的shell
如果mysql未启动, 请先启动mysql服务, 再来执行命令
启动mysql服务如下:
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xx@ubuntu:~$ cd /usr/local/mysql/
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xx@ubuntu:/usr/local/mysql$ sudo ./support-files/mysql.server start
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Starting MySQL
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.. *
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xx@ubuntu:/usr/local/mysql$
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xx@ubuntu:~$ mysql -uroot -p123456
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mysql: [Warning] Using a password on the command line interface can be insecure.
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Welcome to the MySQL monitor. Commands end with ; or \g.
-
Your MySQL connection id is 2
-
Server version: 5.7.5-m15 MySQL Community Server (GPL)
-
-
Copyright (c) 2000, 2014, 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.
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mysql> quit
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Bye
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xx@ubuntu:~$ mysql -uroot -p123456
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mysql: [Warning] Using a password on the command line interface can be insecure.
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Welcome to the MySQL monitor. Commands end with ; or \g.
-
Your MySQL connection id is 3
-
Server version: 5.7.5-m15 MySQL Community Server (GPL)
-
-
Copyright (c) 2000, 2014, 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.
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mysql>
上面提示密码显示不安全信息, 我们也可以键入
然后再接入mysql用户root的新密码进行登录shell即可, 如下:
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xx@ubuntu:~$ mysql -uroot -p
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Enter password:
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 4
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Server version: 5.7.5-m15 MySQL Community Server (GPL)
-
-
Copyright (c) 2000, 2014, 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.
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mysql>
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