Wednesday, 18 March 2009

Enable Passwordless Authentication with SSH

Step 1:
(*note server1 is the source server and server2 will be the destination server)

server1# mkdir ~/.ssh

Step 2:

server1# cd ~/.ssh

Step 3:

server1# ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (”your_local_home”/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in id_rsa.
Your public key has been saved in
The key fingerprint is:
18:6a:e3:78:ab:2d:0c:8e:f9:67:f7:30:32:44:77:34 phil@server1

Step 4:

server1# scp ~/.ssh/

Step 5:

server1# ssh Password:

Step 6:

server2# mkdir .ssh

Step 7:

server2# chmod 700 .ssh

Step 8:

server2# cat >> .ssh/authorized_keys

Step 9:

server2# chmod 644 .ssh/authorzied_keys

Step 10:

server2# exit server1# ssh


  1. Thanks heaps mate, this helped me out heaps! I had been trying for 30 mins but I think ssh is fussy about the exact permission, at least on Debian! James

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