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
在Mac上，如果你在使用安装时提供的第一个密码登录时遇到问题，也许你可以简单地关闭MySQL进程，然后再尝试。
So:
执行如下命令查看MySQL的PID: mysql | grep -v grep 终止进程: Kill -15[进程id]
可以使用初始密码登录:
mysql -uroot -p
它要求你输入密码。只需输入初始密码。
其他回答
如果问题仍然存在，请尝试强制修改密码。
停止MySQL服务器(Linux):
/etc/init.d/mysql stop
停止MySQL服务器(Mac OS X):
mysql.server stop
使用——skip-grant-tables启动mysqld_safe守护进程:
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(Linux):
/etc/init.d/mysql stop
停止MySQL服务器(Mac OS X):
mysql.server stop
启动MySQL服务器服务，测试以root用户登录:
mysql -u root -p
在终端输入:
mysql -u root -p
然后它会问你密码。
注意:对于MySQL 5.7+，请参见Lahiru对这个问题的回答。这包含了更多的最新信息。
对于MySQL < 5.7:
默认root密码为空(即空字符串)，而不是root。所以你可以登录为:
mysql -u root
安装完成后，您显然应该更改root密码:
mysqladmin -u root password [newpassword]
在大多数情况下，您还应该在广泛使用数据库之前设置个人用户帐户。
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');
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
