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
我想在建议重新安装MySql的答案中再补充一个提示:在我的情况下，重新安装还不够，我还必须删除/etc/mysql文件夹(MySql 8, Ubuntu 20)。
其他回答
2021年。
回答Ubuntu 20.04 (Focal Fossa)(也可能是其他发行版)。
在四处游荡了几天之后…这些答案对我都没用，我就这么做了，而且成功了!
始终在Bash shell中:
sudo systemctl disable mysql
为了阻止守护进程在启动时启动。
sudo apt purge mysql-server
and
sudo apt purge mysql-community-server*
在那里，它警告你，你将删除配置文件…所以它起作用了!因为他们就是捣乱的人!
sudo autoremove
删除所有遗留的包。
然后重启(也许这是可选的，但我做到了)。 另外，我从MySQL官方网页下载了MySQL -server-8.0:
sudo apt install mysql-server
它正在工作的信号是，当您输入上面的命令时，系统要求您输入根密码。
最后:
mysql -u root -p
还有你之前输入的密码。
在Ubuntu 16.04 (Xenial Xerus)和MySQL 5.7.13版本中，我能够通过以下步骤解决这个问题:
Follow the instructions from section B.5.3.2.2 Resetting the Root Password: Unix and Unix-Like Systems MySQL 5.7 reference manual When I tried #sudo mysqld_safe --init-file=/home/me/mysql-init & it failed. The error was in /var/log/mysql/error.log: 2016-08-10T11:41:20.421946Z 0 [Note] Execution of init_file '/home/me/mysql/mysql-init' started. 2016-08-10T11:41:20.422070Z 0 [ERROR] /usr/sbin/mysqld: File '/home/me/mysql/mysql-init' not found (Errcode: 13 - Permission denied) 2016-08-10T11:41:20.422096Z 0 [ERROR] Aborting
mysql-init的文件权限不是问题。我们需要编辑AppArmor权限。
Edit by sudo vi /etc/apparmor.d/usr.sbin.mysqld .... /var/log/mysql/ r, /var/log/mysql/** rw, # Allow user init file /home/pranab/mysql/* r, # Site-specific additions and overrides. See local/README for details. #include <local/usr.sbin.mysqld> } Do sudo /etc/init.d/apparmor reload Start mysqld_safe again. Try step 2 above. Check file /var/log/mysql/error.log. Make sure there is no error and the mysqld is successfully started. Run mysql -u root -p Enter password: Enter the password that you specified in mysql-init. You should be able to log in as root now. Shutdown mysqld_safe by sudo mysqladmin -u root -p shutdown Start mysqld the normal way by sudo systemctl start mysql
我也遇到了同样的问题。我做了:
打开cmd 进入C:\Program Files\MySQL\MySQL Server 8.0\bin> (MySQL Server 8.0可能不同，取决于你安装的服务器) 然后输入以下命令mysql -u root -p 它会提示输入密码…简单地按Enter，因为有时你在安装时输入的密码会变为空白。
现在您可以简单地访问数据库。
这个解决方案在Windows平台上很适合我。
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
在服务器初始启动时，假设服务器的数据目录为空，会发生以下情况:
完成服务器的初始化。 在data目录下生成SSL证书和密钥文件。 安装并启用validate_password插件。 创建超级用户帐户“root”@“localhost”。超级用户的密码被设置并存储在错误日志文件中。 要显示它，使用以下命令:
Shell > sudo grep '临时密码' /var/log/mysqld.log
请使用临时密码登录，并自定义超级用户密码，尽快修改root用户密码:
Shell > mysql的root -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass5!
