Reuse docker images and save bandwidth

Lately, Docker has been creating a lot of fuss and I decided to give it a try. The website was easy to follow and the hello world example easy to setup.

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How to use ssh keys to make password-less logins

I regularly connect to my father's Ubuntu PC using ssh to help or to transfer files through scp. I have been using ssh keys to make these logins password-less and I thought the method needs a blog post :)
Generally a user can have two keys - a private key and a public key which we generate using the following process and then copy the public key to the remote machine. Remember, don't give anyone your private key.

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