Rsync with incremental backup

If you want to do incremental backup between two servers. Let say there is a folder /root in
your local server which you want rsync to the /tmp/ribs via SSH
You have to first define switch for rsync command  -racv -e than you have to tell user
and the protocal. Here we use ssh protocal and root user so  "ssh -l root" than you have
to define the IP of the remote server that is 192.168.1 and than tell where you want
to backup on remote server. We define path /tmp/ribs now you will be able to backup the
root folder of local machine to the remote server /tmp/ribs

rsync -racv  -e  "ssh -l root" /root  192.168.1.1:/tmp/ribs

Switch

• rsync - this syncs the local directory to with the server directory.
• -e "ssh" - this tells rsync to use ssh if your want to pass in other ssh options such as port you can do that in the quotes: -e "ssh -p 12345"
• -rca recursive, checksum, and archive
• --delete-after - this will delete files on the server if you delete them locally.

Now you can create a shell script

#!/bin/sh
rsync -racv  -e  "ssh -l root" /root  192.168.1.1:/tmp/ribs

Now sure make the file is executable: chmod ug+x backupscript.sh

Next type crontab -e this will open up your scheduled tasks list, in most cases it will open an empty file. Add the following to the file:

*9 * * * root /root/backupscript.sh
Here we tell that to run this script everyday 9AM. This script will be run as root and the script
located in the /root folder by name /backupscript.sh will be executed

That's will schedule the script to run at AM.

Cheers!!