Netcat 사용 예

* telnet 접속

 server1# nc -t server2-ip 23

* 서버간 채팅

 server1# nc -l -p 9999
 server2# nc server1-ip 9999

* IPv6로 접속 (-6: IPv6, -4: IPv4)

 server1# nc -6 -l 9999
 server2#nc -6 server1-ip 9999

* copying a file

 server1# nc -l -p 9999 > file-name
 server2# cat file-name | nc -w 3 server1-ip 9999

* Hard Drives & partition 복제

 server1# nc -l -p 9999 | dd of=/dev/sda
 server2# dd if=/dev/sda | nc server1-ip 9999

* port scanning

 server1# nc -v -w 1 server2-ip -z 1-1000 <= Port number

* port range에 “quit”문자를 보내서 응답(버전정보) 확인

 server1# echo "quit" | nc -vv -w 5 server2-ip 20-40  <= port No.

* 간단한 web-page(somepage.html) 서비스

 server# while true; do nc -l -p 80 -q 1 < somepage.html; done