Script to install pubkey on remote SSH server

install-pubkey.sh

#!/bin/sh
# Copyright 2008 Jaakko Heusala <jheusala@iki.fi>
# Sat, 17 May 2008 17:36:40 +0300
id_rsa_pub_file=".ssh/id_rsa.pub"
for host in "$@"; do
        if test -f "$host"; then
                id_rsa_pub_file="$host"
                continue
        fi
        echo "$host: Installing $id_rsa_pub_file..."
        ssh "$host" 'cat > tmp.id_rsa.pub \
                && mkdir -p .ssh \
                && chmod 700 .ssh \
                && touch .ssh/authorized_keys \
                && chmod 600 .ssh/authorized_keys \
                && cat tmp.id_rsa.pub >> .ssh/authorized_keys \
                && rm tmp.id_rsa.pub' < $id_rsa_pub_file || exit 1
        echo "$host: Installed"
done