Best way to clone an installation (copying to identical hardware)

Clonezilla sounds like it fits your needs

dd

A low level copy using dd would do the trick!

Watch out for conflicting IP addresses and hostnames.

Basically put the source drive and destination drive in the same machine, boot into a live cd. And run something like the following where /dev/sda is the source and /dev/sdb is the destination:

dd if=/dev/sda of=/dev/sdb bs=4096

I remember the operands by:

if -> input file

of -> output file

bs -> block size (how many bytes to read at a time)

Create an image using Remastersys, transfer it to a pen drive using the Startup Disk Creator utility and install on other system.