linux ubuntu ssh login
To replace the normal text password login with ssh public/private key pair....
Generate a pair at home (creates RSA based key pair)
Enter in a passphrase when it asks.
upload the .pub key to the server
Login to the server normally as root.
Goto the .ssh directory
Append the public key to the authorized_keys
Then check that /etc/ssh/sshd_config has...
... in it
Restart the ssh server
Logout.
Try logging in again as root and you should be prompted for passphrase to your ssh key.
Use
to diagnose problems
Generate a pair at home (creates RSA based key pair)
ssh-keygen -t rsa
Enter in a passphrase when it asks.
upload the .pub key to the server
sftp root@<server address> lcd /home/<your login>/.ssh put id_rsa.pub
Login to the server normally as root.
Goto the .ssh directory
Append the public key to the authorized_keys
ssh root@<server address> cd .ssh cat id_rsa.pub >> authorized_keys
Then check that /etc/ssh/sshd_config has...
RSAAuthentication yes PubkeyAuthentication yes
... in it
Restart the ssh server
/etc/init.d/ssh reload
Logout.
Try logging in again as root and you should be prompted for passphrase to your ssh key.
Use
ssh -v root@<server address>
to diagnose problems