Key-based authentication

1Rw, OHW’V find RXW hRw WR VHW XS 66H SXEOLF NHy authentication to log in without passwords. This involves several steps. First, run these on host A, from which you want to log in to host B: $ ssh-keygen -t dsa <Keep empty private key password> $ cat ~/.ssh/id_dsa.pub | ssh hostB “cat >> ~/.ssh/authorized_ keys”

With this, the public key on A should be appended to the ~/.ssh/authorized_keys fiOH Rn hRVW B. 1HxW, VHW XS WhH sshagent daemon and use the ssh-add command to load the key. On host A, use the following commands: $ eval `ssh-agent -s` $ ssh-add $ ssh-add -l (SKRULD LLST YRUR KEY fiNGERPRLNT)

Now you are all set. If you log in on host A, you can talk to the remote machine without passwords; in place of this, your private key authenticates you to the other host. Instead of laboriously typing passwords, this lets you log in with the private key’s password just once, and use the key for multiple remote logins. This is a bit complex, so please try it a few times to get it right.