Mac /



my summary:

# generate a key, with or without passphrase
ssh-keygen -t rsa -b 2048 -C " key for rcvn@mac" -f ~/.ssh/id_nas
# put on remove
ssh-copy-id rcvn@nas.local
# then tell the shell to auto add the key, in .profile or equivalent
ssh-add .ssh/id_nas
# and use ssh without typing a password
ssh rcvn@nas.local
# using without ssh-add 
ssh -i ~/.ssh/id_nas nas.local