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
我遇到了这个非常烦人的问题，并且找到了许多不管用的答案。我遇到的最好的解决方案是完全卸载MySQL并重新安装。重新安装时，您设置了根密码，这就解决了这个问题。
sudo apt-get purge mysql-server mysql-client mysql-common mysql-server-core-5.5 mysql-client-core-5.5
sudo rm -rf /etc/mysql /var/lib/mysql
sudo apt-get autoremove
sudo apt-get autoclean
这段代码是我在其他地方找到的，所以我没有任何功劳。但它确实有效。要在卸载MySQL后安装它，我认为DigitalOcean有一个很好的教程。看看我的要点。
如何在Ubuntu上安装MySQL
其他回答
在终端输入:
mysql -u root -p
然后它会问你密码。
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
我使用的是mysql-5.7.12-osx10.11-x86_64。dmg在Mac OS X上。
安装过程会自动为root用户设置一个临时密码。你应该保存密码。密码不可恢复。
按照说明操作:
Go to cd /usr/local/mysql/bin/ Enter the temporary password (which would look something like, "tsO07JF1=>3") You should get the mysql> prompt. Run, SET PASSWORD FOR 'root'@'localhost' = PASSWORD('{YOUR_PASSWORD}'); If you wish to set your password: "root" then the command would be, SET PASSWORD FOR 'root'@'localhost' = PASSWORD('root'); Run ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER; Run exit Run ./mysql -u root -p Type your password. In my case I would type, "root" (without quote) That's all.
为了方便起见，您应该在PATH环境变量中添加“/usr/local/mysql/bin”。
现在你可以在任何地方输入。/mysql -u root -p，然后输入密码，你会得到mysql>提示。
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');
如果问题仍然存在，请尝试强制修改密码:
/etc/init.d/mysql stop
mysqld_safe --skip-grant-tables &
mysql -u root
设置新的MySQL root用户密码:
use mysql;
update user set password=PASSWORD("NEW-ROOT-PASSWORD") where User='root';
flush privileges;
quit;
停止MySQL服务器:
/etc/init.d/mysql stop
启动MySQL服务器并测试它:
mysql -u root -p
