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

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';

其他回答

一句话就解决了我的问题。

sudo dpkg-reconfigure mysql-server-5.5

因为你的错误信息显示“PASSWORD: YES”,这意味着你正在使用错误的密码。这种事也发生在我身上。幸运的是,我记得我的正确密码,并能够使数据库连接工作。

请阅读官方文档:MySQL:如何重置Root密码

如果您可以访问终端:

MySQL 5.7.6及以上版本:

mysql

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

MySQL 5.7.5及以前版本:

mysql

mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPass');

如果其他答案都不适合您,并且您收到了以下错误:

mysqld_safe Logging to '/var/log/mysql/error.log'.
mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists.
[1]+  Exit 1                  sudo mysqld_safe --skip-grant-tables

按照以下命令依次执行,直到重置密码:

# Stop your server first
sudo service mysql stop

# Make the MySQL service directory.
sudo mkdir /var/run/mysqld

# Give MySQL permission to work with the created directory
sudo chown mysql: /var/run/mysqld

# Start MySQL, without permission and network checking
sudo mysqld_safe --skip-grant-tables --skip-networking &

# Log in to your server without any password.
mysql -u root mysql


# Update the password for the root user:
UPDATE mysql.user SET authentication_string=PASSWORD('YourNewPasswordBuddy'), plugin='mysql_native_password' WHERE User='root' AND Host='localhost';

# If you omit (AND Host='localhost') section, it updates
# the root password regardless of its host

FLUSH PRIVILEGES;
EXIT;

# Kill the mysqld_safe process
sudo service mysql restart

# Now you can use your new password to log in to your server
mysql -u root -p

# Take note for remote access. You should create a remote
# user and then grant all privileges to that remote user

我可以通过执行这条语句来解决这个问题

sudo dpkg-reconfigure mysql-server-5.5

这将改变根密码。