Simple dublicity script

backup.sh

#!/bin/bash

export PASSPHRASE=1234

FTP_URL="sftp://user@host:port/file"
BK_FULL_FREQ="1M" # create a new full backup every...
BK_FULL_LIFE="6M" # delete any backup older than this
BK_KEEP_FULL="2"  # How many full+inc cycle to keep

function makebackup() {
        logfile=${1//\//-}
        logfile=${logfile:1:${#logfile}}

        duplicity --full-if-older-than $BK_FULL_FREQ $1 --asynchronous-upload "$FTP_URL/$1" | tee "/root/${logfile}.log"
        duplicity remove-older-than $BK_FULL_LIFE --force "$FTP_URL/$1" | tee "/root/${logfile}.log"
        duplicity remove-all-inc-of-but-n-full $BK_KEEP_FULL --force "$FTP_URL/$1" | tee "/root/${logfile}.log"
}

makebackup /etc
makebackup /var/log

unset PASSPHRASE