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linux to linux backup

I have Fedora , Ubuntu and CentOS machine which I need to configure for automated backup. Backup need both incremental and differential. How shall I achieve that?
Any resources, link?

Here is my backup script just as an example:

Code:

image="/dev/sda1"

backup="/mnt/linux/vectordb/backup/sda1_backup.gz"



body="$(dd if=$image of=$backup 2>&1)"



echo "From: xxx@domain.com

To: xxx@domain.com

Subject: Server Backup Generated

##Logged in as $USER##

Hi, you have a new backup generated;

for the physical drive \"$image\";

generated image is at \"$backup\".

$body

This is an automated backup system timed weekly.

##Server Time $(date)##" | msmtp -t

Let the crontab call this script once a week or month. If you want ot save the backup to another machine, thats another story.

Cron+rsync would be a better option.
Check the usage of rsync command & run it as a cron.

Something like this, should be used on the host:

Quote:

rync -azSP /path-of-files-for-which-you-need-backup Destination-host-name:/path-to-store-backups

You may use options like --delete-after --exclude etc.(Check their usage)

Make this command run as a cron. (Click here for cron tutorials)

Quote:

Originally Posted by ted_chou12 (Post 4891333)

body="$(dd if=$image of=$backup 2>&1)"

That's very crude. It copies empty space in sda1 and isn't a snapshot. It doesn't even gain efficiency by increasing the blocksize.

sensible ideas include:
dump/restore
logical volume snapshots
rsnapshot

rsync is really the best way to go unless space is an issue, in that case you might want to consider tar and sending that across the LAN.

i typically do something like the following:

Code:

### Setting Variables

#####################################

dtstamp="`date +%F-%A-%H.%M.%S `"

dow=`date +%A`

HOMEDIR="$HOME"

PWD=`pwd`

log=${PWD}/logs/`date +%Y-%m-%d-%A`-rsync.log

RUSER=your_user_here

RHOST=either_IP_address_or_DNS_name

RDIR=/path/to/backup



### Checking for logs directory, if not there then create it

#####################################



[ ! -d "${PWD}/logs" ] && mkdir -p ${PWD}/logs >> /dev/null 2>&1



#rsync -aviS /www/ -e "ssh -p ${PORT}" ${RUSER}@${RHOST}:${RDIR}/${dow}/ >> ${log} 2>&1

rsync -aviS /www/ -e ssh ${RUSER}@${RHOST}:${RDIR}/${dow}/ >> ${log} 2>&1



### Clean up log directory to only keep 16 days woth of logs



find ${PWD}/logs/*.log -mtime +15 -exec rm '{}' \;



exit

now that script is designed to only backup specific directories, but it could be easily modified to backup an entire system. do remember that if you wish to make a full system backup that this script will need to be run as root, not as user.

this script keeps seven days worth of backups and is set to run via cron every 4hrs on my web server. it pushes the data from my web server to my NFS server at my house. my web server is located out of my city.

For 3 boxes, home-built eg above is probably good enough.
You could have a look at this for comparison http://www.zmanda.com/quick-backup-setup.html & http://blogs.umass.edu/choogend/2007...-about-amanda/