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Summary: Learn how to troubleshoot and resolve the "xrdp session: Login failed for display 0" error on Unix & Linux systems. Explore possible causes and solutions to ensure a successful remote desktop connection using xrdp.
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Troubleshooting "xrdp session: Login failed for display 0" on Unix & Linux

If you've encountered the "xrdp session: Login failed for display 0" error while trying to establish a remote desktop session on a Unix or Linux system, you're not alone. This error often arises due to various reasons, ranging from configuration issues to authentication problems. In this guide, we'll walk through the troubleshooting steps to help you resolve this issue and successfully connect to your remote desktop.

Understanding the Error

The error message "xrdp session: Login failed for display 0" indicates that the xrdp service is encountering difficulties while trying to authenticate and establish a remote desktop session on display 0. Display 0 is the default display for the X Window System, and issues with authentication can prevent successful logins.

Troubleshooting Steps

Check xrdp Service Status

Ensure that the xrdp service is running on your Unix or Linux system. You can use the following command to check its status:

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If the service is not running, start it with:

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Verify xrdp Configuration

Review the xrdp configuration files to ensure they are correctly set up. Check the configuration files, such as /etc/xrdp/xrdp.ini and /etc/xrdp/sesman.ini, for any errors or misconfigurations.

Authentication Issues

Check the authentication settings for xrdp. Ensure that the user trying to connect has the necessary permissions and that their credentials are correct. You may also want to check the authentication logs for more detailed information:

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Verify Xsession

Ensure that the default Xsession is properly configured. The Xsession file should be present in the user's home directory, typically located at ~/.Xsession.

Firewall Settings

Check if any firewalls are blocking the xrdp connection. Open the necessary ports (default is 3389) to allow remote desktop connections.

Restart xrdp Service

Sometimes, restarting the xrdp service can resolve issues. Use the following commands to restart the service:

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Conclusion

By following these troubleshooting steps, you should be able to identify and resolve the "xrdp session: Login failed for display 0" error on your Unix or Linux system. Remember to carefully review the configuration files, authentication settings, and system logs to pinpoint the root cause of the issue. With the right adjustments, you can ensure a successful remote desktop connection using xrdp.