tarsnap-install.sh

#!/bin/sh

# Installs tarsnap client on Debian and Ubuntu
#
# You'll need to setup an account at
# http://www.tarsnap.com
# and load it with some funds
#
# Make sure you run this as root
#
# Once installed you can start backing up with something useful like
#
# tarsnap -c -f mybackup /var/www
#
# Usage:
# ./tarsnap-install.sh <email> <server name>
#
# eg
# ./tarsnap-install.sh bob@foo.com server1

apt-get install -y curl libssl-dev zlib1g-dev e2fslibs-dev build-essential
mkdir ~/src
cd ~/src
# *******************************************
# CHECK on tarsnap.com for the latest version
# *******************************************
curl https://www.tarsnap.com/download/tarsnap-autoconf-XXXX.tgz | tar -zxvf -
cd tarsnap-autoconf-XXXX
./configure
make all install clean
tarsnap-keygen --keyfile /root/tarsnap.key --user $1 --machine $2
mkdir /usr/local/tarsnap-cache
cp /usr/local/etc/tarsnap.conf.sample /usr/local/etc/tarsnap.conf
echo "Don't forget to take a copy of /root/tarsnap.key and store it somewhere really safe!"

updating to mention you should get the most recent build.