send-ssh-key

#!/bin/sh

eprint () { echo "$@" >&2; }
die () { code=$1; shift; eprint "$@"; exit $code; }

HOST="$1"

[ -n "$HOST" ] || die 1 "usage: $0 ssh-hostname"

if [ ! -e ~/.ssh/id_rsa ]; then
	eprint "generating new rsa ssh key"
	ssh-keygen -t rsa -f ~/.ssh/id_rsa
fi

[ -e ~/.ssh/id_rsa.pub ] || die 2 "public key not found"

cat ~/.ssh/id_rsa.pub | ssh "$HOST" 'mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod -R go= ~/.ssh'