This video shows how to log into a Linode server from a Windows machine using SSH keys. The video will show you how to generate the keys using Putty and then how to configure your Linode Server to allow you to authenticate into the server.
Putty is available to download from www.putty.org
The commands that you need to follow along with the tutorial are:
sudo mkdir ~/.ssh
sudo chmod 700 ~/.ssh
sudo vi ~/.ssh/authorized_keys
sudo chown YourUserName:YourUserName ~/.ssh -R
sudo chmod 600 ~/.ssh/authorized_keys