ssh-copy-id -i /home/dude/.ssh/id_rsa.pub 10.0.0.1:2222
ssh: Could not resolve hostname 10.0.0.1:2222: Name or service not known

ssh-copy-id -i /home/dude/.ssh/id_rsa.pub -p 2222 10.0.0.1
ssh: Could not resolve hostname umask 077; test -d .ssh || mkdir .ssh ; cat >> .ssh/authorized_keys: Name or service not known

# la solution :
ssh-copy-id -i /home/dude/.ssh/id_rsa.pub "-p 2222 10.0.0.1"