Generate and copy ssh publickey to remote host

copypublickey.sh

#!/bin/bash

# replace config
REMOTEUSER="luiscoms"
REMOTEHOST="example.com"

# generate ssh key if not exits
if [ ! -f ~/.ssh/id_dsa.pub ];then
    ssh-keygen -t dsa
fi

# create if not exists .ssh directory
# copy the public key to remote host
ssh $REMOTEUSER@$REMOTEHOST "mkdir -p ~/.ssh; chmod 700 ~/.ssh/; echo `cat ~/.ssh/id_dsa.pub` >> ~/.ssh/authorized_keys; chmod 600 ~/.ssh/authorized_keys"

I found this command

ssh-copy-id -i ~/.ssh/id_dsa $REMOTEUSER@REMOTEHOST