PuTTY, a popular SSH and telnet client, is widely used for accessing remote servers. Over time, users often accumulate a number of session configurations and may need to transfer these to another computer or back them up. Unlike many applications, PuTTY does not store its sessions in a file. Instead, sessions are stored in the Windows Registry. This article guides you through the process of exporting and importing PuTTY session data.

Exporting PuTTY Sessions from the Registry

To export your PuTTY sessions from the Windows Registry, follow these steps:

1. Open the Registry Editor:
   • Press Win + R, type regedit, and press Enter. This opens the Registry Editor.
2. Navigate to the PuTTY Sessions Key:
   • The sessions are stored under HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions. Simon Tatham is the original developer of PuTTY.
3. Export the Sessions Key:
   • Right-click on the Sessions folder.
   • Choose Export.
   • Choose a location to save the .reg file. This file now contains all your PuTTY session data.

Technical Note:

When you export a registry key, the resulting .reg file is a text file containing the Windows Registry entries for the exported data. This file can be manually edited with a text editor if needed.

Importing PuTTY Sessions into the Registry

To import PuTTY session data into another installation of PuTTY on a different Windows machine:

1. Transfer the .reg File:
   • Move the previously exported .reg file to the new machine using a USB drive, email, or any file transfer method.
2. Merge the .reg File with the Registry:
   • Double-click the .reg file on the new machine.
   • You will be prompted to confirm that you want to add the information to the registry. Confirm this to proceed.
3. Verify Import Success:
   • Open PuTTY.
   • Check the saved sessions list to see if all previously saved sessions are available.

Important Considerations:

• Registry Compatibility: Ensure that the Windows versions between export and import machines do not drastically differ, as this might affect the registry structure.
• Back Up the Current Registry: Before merging the .reg file, it's a safe practice to back up the current registry on the new machine.

Additional Tips and Subtopics

Scripting Automation:

For users who frequently back up or migrate PuTTY sessions, automating the export and import process via a script could save time. PowerShell and batch scripting are viable options for automating registry export and import tasks.

Security Concerns:

When transferring session data between machines, consider the security implications. The .reg file can contain sensitive information such as hostnames and potentially proxy settings. Security measures such as using secure transfer methods and temporary storage options are recommended.

Summary Table of Key Actions

This comprehensive guide offers a detailed, step-by-step approach to managing PuTTY sessions effectively by utilizing the Windows Registry. By following these instructions, users can ensure that their valuable session configurations are preserved and can be easily transferred between systems.