Warning of RSA host key while cloning git repository
<p>I am using git bash to clone my github repository and getting warning continuously
I am using SSH so,
I use this git command: <code>git clone git@github.com:TapanHP/HTextView</code> but it gives warning like this</p>

<p><strong>Warning: Permenantly added the RSA host key for IP address to the list of known hosts</strong></p>

<p>Enter passphrase for key <code>'c/users/tapanhp/.ssh/id_rsa':</code> </p>

<p>what is this passphrase? and why this happens? </p>