#!/bin/sh
# setup_sshkey.sh
# Appends your ssh public key to a remote host's authorized key file 
# and make's sure some permissions are correct
# so you can login without typing the remote password each time
#
# Also generates your local private key if none exists
#
# Any ssh options will be passed on to ssh
#
# Best way to install it is to put it in /usr/local/bin under the name setup_ssh
# This way users can simply prepend setup_ to the ssh command that they want to work without typing a password
if [ -z "$1" ] ; then
  echo Setup passwordless ssh access
  echo EXAMPLES:
  echo $0 user@example.com   "(Setup passwordless access to user@example.com)"
  echo $0 -p 2000 user@example.com    "(Same as above, if ssh is on port 2000)"
else
  [ ! -e ~/.ssh/id_dsa.pub ] && echo No existing ssh dsa key. Creating one now. && ssh-keygen -t dsa -f ~/.ssh/id_dsa -N ''
  cat ~/.ssh/id_dsa.pub | ssh $@ 'mkdir -p ~/.ssh; chmod 700 ~/.ssh; cat - >> ~/.ssh/authorized_keys2; chmod 644 ~/.ssh/authorized_keys2'
fi