Simple SSH public key deployment.

deploy_ssh_pubkey.sh

#!/bin/sh
# Usage: $0 [user@]hostname

public_key_path="$HOME/.ssh/id_dsa.pub"
public_key=$(<${public_key_path})

ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $1 <<-END
  echo "Authorize public key ${public_key_path} on \`hostname\`"
  [ -d \$HOME/.ssh ] || mkdir \$HOME/.ssh
  echo $public_key >> \$HOME/.ssh/authorized_keys
END