A Tiny Linux "Hello, World!".
The entire code of this executable is crammed inside the ELF and program headers, which for 32-bit ELF files take up 52 and 32 bytes respectively, adding up to 84, but when you make those headers overlap you can get the size down to 69.
To generate the executable simply run:
make
and the executable will be called hello.
Note: You need to have make and nasm installed.
This is how the executable looks when represented as hex.
00000000: 7f45 4c46 0100 0000 0000 0000 0000 0100 .ELF............
00000010: 0200 0300 2e00 0100 2e00 0100 0400 0000 ................
00000020: b20e b004 cd80 b001 cd80 2000 0100 b301 .......... .....
00000030: b937 0001 00eb e948 656c 6c6f 2c20 576f .7.....Hello, Wo
00000040: 726c 6421 0a rld!.