Linux/Unix Open SSH Login Without Password Key Exchange including Debian, Redhat, Fedora, Ubuntu, BSD etc..

In those 4 simple commands you can setup mutual key exchange between two sshservers by using a single login shell session and single window.

*Just change the IP address examples of (10.10.0.2) to the target of your mutual key exchange.  It doesn't matter if the server is on a LAN or WAN (well unless the server is behind a firewall and you cannot SSH into it).

Code:
ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub|ssh 10.10.0.2 tee -a ~/.ssh/authorized_keys

ssh 10.10.0.2 ssh-keygen -t rsa
ssh 10.10.0.2 cat ~/.ssh/id_rsa.pub |tee -a ~/.ssh/authorized_keys


  • *tee simply just takes stdinput and redirects it to where ever you say.
  • *on some systems you'll need to chmod 600 ~/.ssh/authorized_keys


If you want to do it the hard way, on both servers you can just run this command:

ssh-keygen -t rsa

Just keep hitting enter, and then copy and paste the contents of:

~/.ssh/id_rsa.pub into the other servers "~/.ssh/authorized_keys" file.

Be careful not to add any extra spaces or line breaks when copying it or it won't work.

 

 

 

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