By following these simple 4 steps you will be able to convert ppk file into pem file using Ubuntu.

  • Step 1 – First of all, install the putty tools on your Linux system using below command.
    sudo apt-get install putty-tools
    
  • Step 2 – Now, convert the ppk file to pem file using puttygen command line tool.
    puttygen server1.ppk -O private-openssh -o server1.pem
    
  • Step 3 – Change the .pem file permissions. Set the read-only permissions to the owner of the file, remove any permission to group and other. Otherwise ssh will refuse this key for use.
    chmod 400 server1.pem
    
  • Step 4 – Finally, connect to your remote Linux server with ssh using this pem key.
    ssh -i server1.pem ubuntu@your-server-ip