Thanks to https://www.thegeekdiary.com/how-to-clone-linux-disk-partition-over-network-using-dd/
Clone using telnet
and bzip
has advantages to reduce clone time, but make sure you use a secure network.
Lets assume server-B has ip address 192.168.100.2
Run this command in server B (destination):
# nc -l -p 19000 | bzip2 -d | dd bs=16M of=/dev/sda