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I am new to SSH and I have to log into a remote client. The owner of that client sent me a private key in a text file and a .ppk file. How do I use these to login?

I'm running OS X Lion.

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up vote 1 down vote accepted

You don't need the ppk file if you don't use PuTTY. Instead, save the plain text private key to a file.

mkdir -p ~/.ssh
open -e ~/.ssh/my-key

Paste the key there, and save. Now make it readable by your user only:

chmod 600 ~/.ssh/my-key

Then, use SSH to connect:

ssh user@host -i ~/.ssh/my-key
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try typing

ssh user@<target server> -i /path/to/key/file

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