add_ssh_public_key.sh

#!/bin/sh
if [ $# -lt 1 ]; then echo "Usage: add_ssh_public_key.sh <host> [<user>] [<port>]"; exit 1; fi

HOST=$1 USER=$2 PORT=$3
if [ -z $USER ]; then USER=`whoami`; fi
if [ -z $PORT ]; then PORT=22; fi

STATUS=`cat ~/.ssh/id_rsa.pub |
        ssh -p $PORT $USER@$HOST "sh -c 'cat - >> ~/.ssh/authorized_keys; echo \\$?'"`
if [ "$STATUS" != "0" ]; then
  echo "Failed ($STATUS)"  1>&2; exit $STATUS
fi

echo "public key is added to remote host."
exit 0