A. $ nc -lvp 3000B. $ nc Connection 후 , Message 입력 . A. $ nc -lvp 3000 Message 확인 A. $ nc -lvp 3000 -e /bin/bash listening on [any] 3000 ...B. $ NC Connection .. A. $ nc -lp 3000 > test.pngB. $ nc -w < test.png NC OPTIONS -4 Use only IPv4 -6 Use only IPv6 -b, --bluetooth Use Bluetooth (defaults to L2CAP protocol) --buffer-size=BYTES Set buffer size --continuous Continuously accept connections (o..