root@kali:~/eth10/eth10# cat test.txt
123
root@kali:~/eth10/eth10# cat 
  
root@VM-12-155-debian:~/eth10# {cat,test.txt}
test
root@VM-12-155-debian:~/eth10# cmd=$'\x20test.txt'&&cat$cmd
test
root@VM-12-155-debian:~/eth10# cat<>test.txt
test
root@VM-12-155-debian:~/eth10#
 
  
转载自：http://pupiles.com/shellcode.html