/ Published in: Bash
How to automatically login with SSH. Also known as “key-based authorization with SSH” or simply “publickey authorization”.
- Here are the steps:
- Create a public ssh key, if you haven't one already.
- Look at ~/.ssh. If you see a file named id_dsa.pub then you obviously already have a public key. If not, simply create one. ssh-keygen -t dsa should do the trick.
- Please note that there are other types of keys, e.g. RSA instead of DSA. I simply recomend DSA, but keep that in mind if you run into errors.
- Make sure your .ssh dir is 700:
- chmod 700 ~/.ssh
- Get your public ssh key on the server you want to login automatically.
- A simple scp ~/.ssh/id_dsa.pub [email protected]: is ok.
- Append the contents of your public key to the ~/.ssh/authorized_keys and remove it.
- Important: This must be done on the server you just copied your public key to. Otherwise you wouldn't have had to copy it on your server.
- Simply issue something like cat id_dsa.pub >> .ssh/authorized_keys while at your home directory.
- Instead of steps 3 and 4, you can issue something like this:
- cat ~/.ssh/id_dsa.pub | ssh -l remoteuser remoteserver.com 'cat >> ~/.ssh/authorized_keys'
- Remove your public key from the home directory on the server.
- You can now login:
- ssh -l remoteuser remoteserver.com or ssh firstname.lastname@example.org without getting asked for a password.
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