我一直在按照手册在Ubuntu上安装软件套件。我完全不了解MySQL。我已经在我的Ubuntu上完成了以下安装。
sudo apt-get update
sudo apt-get install mysql-server-5.5
sudo apt-get install mysql-client-5.5
sudo apt-get install mysql-common
sudo apt-get install glade
sudo apt-get install ntp
然后我做了
cd ~/Desktop/iPDC-v1.3.1/DBServer-1.1
mysql -uroot -proot <"Db.sql"
我最终得到以下错误消息。
错误1045(28000):拒绝访问用户'root'@'localhost'(使用密码:YES)
我该如何修复它并继续?
当前回答
当您的密码丢失时就会发生这种情况。
忘记密码时的修改步骤:
Stop MySQL Server (on Linux): sudo systemctl stop mysql Start the database without loading the grant tables or enabling networking: sudo mysqld_safe --skip-grant-tables --skip-networking & The ampersand at the end of this command will make this process run in the background, so you can continue to use your terminal and run mysql -u root (as root). It will not ask for a password. If you get error like as below: 2018-02-12T08:57:39.826071Z mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists. mysql -u root ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) [1]+ Exit 1 Make MySQL service directory. sudo mkdir /var/run/mysqld Give MySQL user permission to write to the service directory. sudo chown mysql: /var/run/mysqld Run the same command in step 2 to run MySQL in background. Run mysql -u root. You will get the MySQL console without entering a password. Run these commands FLUSH PRIVILEGES; For MySQL 5.7.6 and newer ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password'; For MySQL 5.7.5 and older SET PASSWORD FOR 'root'@'localhost' = PASSWORD('new_password'); If the ALTER USER command doesn't work use: UPDATE mysql.user SET authentication_string = PASSWORD('new_password') WHERE User = 'root' AND Host = 'localhost'; Now exit To stop the instance started manually: sudo kill `cat /var/run/mysqld/mysqld.pid` Restart MySQL sudo systemctl start mysql
其他回答
如果你把MySQL作为Docker镜像的一部分(比如在6606端口上)，而Ubuntu安装(在3306端口上)，指定端口是不够的:
mysql -u root -p -P 6606
将把:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
因为默认情况下它试图连接到localhost，指定您的本地IP地址可以修复这个问题:
mysql -u root -p -P 6606 -h 127.0.0.1
你必须重设密码!Mac OS X(已测试并正在运行)和Ubuntu的步骤:
停止使用MySQL
sudo service mysql stop
or
sudo /usr/local/mysql/support-files/mysql.server stop
以安全模式启动:
sudo mysqld_safe --skip-grant-tables --skip-networking
(上面一行是整个命令)
这将是一个持续的命令，直到进程结束，所以打开另一个shell/终端窗口，登录没有密码:
mysql -u root
mysql> UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';
根据@IberoMedia的评论，对于新版本的MySQL，该字段被称为authentication_string:
mysql> UPDATE mysql.user SET authentication_string =PASSWORD('password') WHERE User='root';
启动MySQL使用:
sudo service mysql start
or
sudo /usr/local/mysql/support-files/mysql.server start
你的新密码是“password”。
注意:对于MySQL > 5.7版本，请尝试以下操作:
update mysql.user set authentication_string='password' where user='root';
在我的情况下，我发现我的根密码在日志文件“mysqld.log”，路径“/var/log”。
在我运行命令“mysql -u root -p”后，我输入我的root密码，我在/var/log/mysql .log中找到。
一句话就解决了我的问题。
sudo dpkg-reconfigure mysql-server-5.5
如果你还没有设置密码，那么运行mysql -uroot。这对我很管用。
