nc - arbitrary TCP and UDP connections and listens File transfer between machines: $ nc -l 1234 > filename.out Using a second machine, connect to the lis

nc - arbitrary TCP and UDP connections and listens File transfer between machines: $ nc -l 1234 > filename.out Using a second machine, connect to the listening nc process, feeding it the file which is to be transferred: $ nc host.example.com 1234 < filename.in Or a simple web server: $ while true ; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n $(date)"'; done