Disk Imaging for Linux

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Looking at modern ways to create a disk image of your linux system, there are a number of options. The first and best option as of this writing (2019) is clearly a free product called Clonezilla.

Clonezilla

Clonezilla Live is a small bootable Linux distribution for disk cloning, disk imaging and data recovery. The most common version for end users, Clonezilla Live, enables a user to clone a single computer's storage media, or a single partition on the media, to a separate medium device. The cloned data can be saved as an image-file or as a duplicated copy of the data. The data can be saved to locally attached storage device, an SSH server, a Samba server, or an NFS file-share. The clone file can then be used to restore the original when needed.

Ghost for Unix

g4u was a great imaging solution years ago, however, is out of date.

dd and dcfldd

To clone one partition to another: 

dd if=/dev/sdc3 of=/dev/sdd3 bs=4096 conv=noerror

Mondo Rescue

Mondo Rescue is free disaster recovery software. It supports Linux and FreeBSD. It's packaged for multiple distributions. It also supports tapes, disks, USB devices, network and CD/DVD as backup media, multiple filesystems, LVM, software and hardware RAID.

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