rsync - Copy directory
rsync --ignore-existing --progress -rvh /source/path /dstination/path-rrecursive-vverbose-hhuman 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/sdc1if=source disk / partitionof=destination disk / partition