rsync - Copy directory
rsync --ignore-existing --progress -rvh /source/path /dstination/path
-r
recursive-v
verbose-h
human unit
dd - Clone disk / partition
# get disks
fdisk -l
# clone disk
dd if=/dev/sdb of=/dev/sdc
# clone partition
dd if=/dev/sdb1 of=/dev/sdc1
if=
source disk / partitionof=
destination disk / partition