I often find myself looking up EC2 nodes by instance ID so I can grab the external DNS name and SSH in. Fed up with the extra "ec2-describe-instance , copy, paste" layer, I threw together a function (basically a fancy alias) to SSH into an EC2 instance referenced by ID.
Assuming you’re on Mac OS X / Linux, just put this somewhere in ~/.profile, reload your terminal, and you’re good to go.
Alternatively, you can use the shell script version.
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