The first time
ssh-copy-id it will ask
# ssh-copy-id -i .ssh/id_dsa.pub firstname.lastname@example.org The authenticity of host 'example.com (xxx.xxx.xxx.xxx)' can't be established. RSA key fingerprint is 39:fb:5e:70:30:33:2b:18:17:e9:4f:2f:91:b5:d2:21. Are you sure you want to continue connecting (yes/no)?
Is it possible to script this, so the script just will answer yes?