Redirect the remote terminal information to the local QT UIbb

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AI summary
To redirect continuous terminal output from a remote machine to a local Qt UI application, establish an SSH connection using QProcess. Set up SSH with keys for password-less authentication, create a UI with a QTextEdit for output display, and a button to start the SSH session. The application reads and appends the remote output to the text edit area. Additional considerations include error handling and using dedicated libraries for more robust implementations.
Tags
RemoteTerminalOutput
QtApplication
SSHConnection
Last edited time
Jan 20, 2024 01:42 AM
If you want to redirect the continuous terminal output of a remote machine to a local Qt UI application, it's a bit more involved than just running one-time commands. You would need to maintain an SSH connection and continuously read from its output.
One effective method is to use QProcess to start an SSH session, then continuously read the output. Here's a basic overview and a simple example using QProcess:
  1. Setup:
      2. Ensure that SSH is correctly set up on both the local computer and the remote board. Using SSH keys for password-less authentication is highly recommended for smoother operations.
  1. Qt Application:
mainwindow.h:
mainwindow.cpp:
  1. Design the UI:
In the Qt Designer:
  • Add a QTextEdit for displaying the terminal output.
  • Add a QPushButton to start the SSH session and begin fetching the output.
  1. Running the Application:
When you run the application and click the button, it will start an SSH session to the remote machine. Any output in the remote terminal will get displayed in the QTextEdit.
Additional Considerations:
  • Error Handling: The example above does not handle potential errors from QProcess or the SSH connection. In a real-world application, you should handle these errors.
  • Password-less SSH: As mentioned earlier, this example assumes you have set up SSH keys for password-less login. If not, you'd need to provide the password somehow, which complicates things. Using tools like sshpass or considering a dedicated library like libssh can help here.
  • Continuous Output: If you're looking to capture the continuous output of a specific command or script on the remote machine, you can append that command to the SSH command string.
This method provides a basic way to capture and display remote terminal output in a Qt application. For more robust and production-level applications, consider using a dedicated SSH library that integrates better with Qt's event loop and offers more features.
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