A better ssh-copy-id

copy_ssh_id.sh

# Copy an SSH key to multiple accounts on multiple machines.
# Better than ssh-copy-id because it works with systems that don't
# use passwords over ssh.

echo "Enter the ssh pub key: "
read PUBKEY

echo "Enter the hosts to copy the key to (separated by space)"
read HOSTS
HOSTS=(${HOSTS// / })

echo "Enter the usernames to add the key to (separated by space)"
read USERS
USERS=(${USERS// / })

echo "-------"
echo -n "Pubkey to copy: "
echo $PUBKEY

echo "Hosts:"
for i in "${HOSTS[@]}"; do
    echo -n "  "
    echo $i
done

echo "Users:"
for i in "${USERS[@]}"; do
    echo -n "  "
    echo $i
done

echo "---"
echo "Copy the key to the users on these hosts? (y/N)"
read continue
case $continue in
        [Yy]* ) ;;
        [Nn]* ) echo "OK, nevermind"; exit;;
        * ) echo "OK, nevermind."; exit;;
esac

for host in "${HOSTS[@]}"; do
    for user in "${USERS[@]}"; do
        ssh -l $user $host "echo $PUBKEY >> ~/.ssh/authorized_keys"
        echo "$user@$host: DONE"
    done
done