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arssh

SSH into AWS instances by name tag or instance id.

Features:

  • Caches the instance list so subsequent sshes don't take too long.
    • There's a random based refresh so it doesn't go stale forever.
    • You can force a refresh by passing CACHEBUST=1 as an env var. I wanted to keep the command line as close to ssh as possible so I decided on an env var.
  • Tries to guess the default user based on the AMI name (only guesses ubuntu and the rest uses ec2-user)
  • Any extra arguments you would normally pass to ssh are also sent.