ERROR 2003 (HY000): Can t connect to MySQL server on localhost (10061)

当你遇到MySQL错误2003 "Can't connect to MySQL server on 'localhost' (10061)"，通常意味着MySQL服务器无法在本地主机上连接。这个错误可能是由于以下几个原因： 1. **服务未启动**：检查MySQL服务是否正在运行。对于Windows用户，可以在服务管理器中查找“MySQL Server”；Linux或macOS用户可以尝试输入`sudo service mysql start` 或者 `sudo systemctl start mysql`。 2. **防火墙设置**：确认防火墙或安全组配置是否阻止了MySQL端口（默认是3306）。如果是，请临时关闭防火墙并测试连接。 3. **权限问题**：如果你不是root用户，可能需要提供正确的用户名和密码，并且该用户有访问数据库的权限。 4. **网络问题**：检查你的计算机网络连接，确保能正常访问外部资源。 5. **文件路径错误**：如果MySQL安装的位置改变了，配置文件可能需要更新。检查my.cnf（或my.ini）文件中的socket路径设置。 6. **系统级限制**：某些操作系统的限制可能导致连接失败，如SELinux策略等，需要相应的调整。 为了解决这个问题，请按照上述步骤排查，如果问题依然存在，建议查看MySQL的日志文件（通常是mysql-error.log）获取更详细的错误信息，以便找到问题根源。

This error message indicates that the MySQL server is not running or is not accessible on the specified port (3306) on the local machine. Possible causes of this error include: 1. The MySQL server is not running: You need to start the MySQL server by running the appropriate command for your operating system. 2. The MySQL server is running on a different port: Check if the MySQL server is running on a different port by looking at the configuration file. 3. Firewall or security software blocking the connection: Check if there is any firewall or security software that is blocking the connection to the MySQL server. 4. Incorrect MySQL server credentials: Check if you have provided the correct username and password to connect to the MySQL server. 5. Incorrect hostname or IP address: Check if you have provided the correct hostname or IP address to connect to the MySQL server. To resolve this error, you should first check if the MySQL server is running and accessible on the specified port. If the server is running and accessible, then you should check for any firewall or security software that may be blocking the connection to the server. If you are still unable to connect, then you should check if you have provided the correct credentials, hostname or IP address.