I am total newbie to Linux Disk and backup management tasks, but I need to backup a CentOS 6 Linux Box configured as gateway for a small LAN.
This box has been already been configured for gateway settings with applications like:-
- squid proxy
- OpenVPN and
- SAMAB4 as active directory
- painfully installed drivers for cheap external USB Ethernet and wireless ports
Now, To create a backup machine similar to this gateway, it would be long and painful to create a new Linux box, configuring above applications, dependencies, binaries and required drivers from scratch.
I looked up for backing up using "dd" by creating an image of entire hard disk and restoring it onto target machine (I guess which might also take long time for large hard disks to create an full image), but its prerequisites says target hard disk space should be equal or more in size, same case is with clonezilla (please correct if wrong).
But the new ongoing backup machine is only having 100 GB of hard disk space and the gateway machine is around 250GB~, BTW the actual used space so far on gateway machine is only 50 GB.
Is There any workaround by which I can restore a complete image of gateway box into 100 GB hard disk?
Also any suggestions for setting up incremental backup for data sync between these two box once backup machine ready?
stepwise instructions to solve this scenario would be very helpful.