Script for automated daily rsync-based backups (keeps last 7 days)

rsync-daily

#!/bin/sh

### expects file "conf" with configuration
###
### example:
###   src="root@mercury"
###   dirs="/var /etc /root /home"
###   excludes="/var/log/nagios/spool/checkresults/*"

log() {
  echo `date` "$@"
}
prefixAll() {
  prefix="$1"
  shift
  for item in $@; do
    acc="$acc ${prefix}$item"
  done
  echo "$acc"
}

cd $(dirname $(readlink -f $0))
. ./conf
exec 1>>log

dst="latest"
today=`date +%a`
yesterday=`date -d "yesterday" +%a`
params="--hard-links --delete-during --link-dest=../$yesterday"

log "rsyncing $src to $dst (hard-linking to $yesterday)..."
rsync -azq --bwlimit=5000 --numeric-ids $(prefixAll "--exclude=" $excludes) $params $(prefixAll "$src:" $dirs) $dst/
log "...done."

log "rsyncing $dst to $today (hard-linking to $yesterday)..."
rsync -aq $params $dst/ $today/
log "...done."
echo