A simple duplicity backup script

backup.sh

#!/bin/bash
ulimit -n 10000
PIDFILE=/var/run/backup.pid
LOGFILE=/var/log/backup.log

if [ -f "$PIDFILE" ]; then
	RUNPID=`cat $PIDFILE`
	if ps -p $RUNPID; then
		echo "Backups are already running..."
		exit 1
	else
		echo "Backup pid found but the process is dead. Cleaning up..."
		rm -f $PIDFILE
	fi
else
	echo "No backup process detected"
fi
echo $$ > $PIDFILE

test -x $(which duplicity) || exit 0
. /root/.passphrase

export PASSPHRASE
$(which duplicity) --encrypt-key E4C7DC7A628F94E2 --exclude /tmp --exclude /proc --exclude /dev --exclude /sys --exclude /backup --exclude /run --exclude /home/jharris/Videos / file:///backup/duplicity |/usr/bin/tee $LOGFILE

echo -n "Backups completed at: "
date
rm -f $PIDFILE