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
一句话就解决了我的问题。
sudo dpkg-reconfigure mysql-server-5.5
其他回答
我也遇到过类似的问题:
错误1045(28000):用户“root”@“localhost”(正在使用)被拒绝访问 密码:没有)
但对我来说，这个原因真的很愚蠢。 我从Word文档复制了该命令，问题是连字符没有ASCII 0x2D代码，而是Unicode 0xE2 0x80 0x93 UTF-8序列(代码点U+2013 EN DASH)。
错误的方式:
mysql -u root –pxxxx
正确的方式:
mysql -u root -pxxxx
两者看起来一样，但并不相同(尝试一下，复制和粘贴替换密码)。
面对这种类型的错误，建议尝试输入命令，而不是复制和粘贴。
对于那些目前的答案不工作的人，可以试试这个(在macOS上测试):
mysql -h localhost -u root -p --protocol=TCP
在此之后，将要求您输入密码，您应该使用您的操作系统用户密码。然后当你进入MySQL时，你可以运行:
select Host, User from mysql.user;
你应该看到:
MySQL [(none)]> select Host, User from mysql.user;
+-----------+------------------+
| Host | User |
+-----------+------------------+
| localhost | mysql.infoschema |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+------------------+
从这里你可以改变配置，编辑密码或修改拨款。
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
默认情况下，密码为空，因此您必须按照以下步骤修改密码。
连接MySQL
root# mysql
Use mysql
mysql> update user set password=PASSWORD('root') where User='root';
最后，重新加载特权:
mysql> flush privileges;
mysql> quit
我在Ubuntu 18.04 (Bionic Beaver) LTS和MySQL服务器版本5.7.27-0ubuntu0.18.04.1 (Ubuntu)时遇到了这个问题。
我的解决方案是(以root身份运行sudo -i):
mysql <<-EOSQL
use mysql;
update user set plugin="mysql_native_password" where User='root';
FLUSH PRIVILEGES;
EOSQL
mysqladmin -u root password new_pw
