Linux nodes can accept a login using ssh and an ssh client is therefore required. This page explains how to use PuTTY to connect to the Linux node using a public/private key pair (instead of a password). It also covers how to create a basic configuration on the Linux node and install LifeKeeper for Linux. After installing LifeKeeper, we will add more tools to enable x11 to use the GUI based applications.

Download and Install Tools

Download and install the following software:

  • PuTTY (ssh client on Microsoft Windows)

Download the latest PuTTY software and install it.

Converting the Private Key (.pem)

If you have a Private Key file in a <filename> .pem format, convert it to a PuTTY Private Key File (*.ppk) file.

To convert the file:

  1. Start the ‘PuTTY Key Generator’.
  1. Select Load, then specify your <filename>.pem file.
  1. Select ‘Save private key’ as <filename>.ppk.

Configure PuTTY

  1. Open PuTTY and select Connection > SSH > Auth.
  1. Select the private key file at ‘Private key file for authentication’.


  1. You may want to save your configuration as a ‘Session’ page to avoid reconfiguring each time.

Connect to a Linux Instance

  1. Start the session from PuTTY.

  1. Confirm the security alert that indicates the server has not been connected to before. Select “Yes” to proceed.
  1. You are now connected!


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