title: ssh key passphrase works in windows but not in linux
body: <p>I'm working to a project in git.
  In Windows, I'm using git extensions to manage this project, and to access to the public repository they gave me a .ppk key. I load it into git extension, with the passphrase that they gave me, and it works.</p>
  
  <p>Now I set a linux (ubuntu-32bit) virtual machine, and I want to access also from this machine to the repository.</p>
  
  <p>From another thread that I've seen in this site, I use, to clone the repository, the following command:</p>
  
  <pre><code>ssh-agent bash -c 'ssh-add /home/myHome/mykey.ppk; git clone git@serveraddress:project.git'
  </code></pre>
  
  <p>Then, the shell tells me to insert the passphrase</p>
  
  <pre><code>Enter passphrase for /home/myHome/mykey.ppk:
  </code></pre>
  
  <p>But when I insert it, it tells me that's a bad passphrase. I've checked it a lot of times, and I'm sure that I use the same passphrase that I use in windows. So how can I use correctly the key in Linux?</p>
  
  <p>Thanks in advance for your replies.</p>