expected.txt

✓ ~/ $ echo -ne '\x7f\x45\x4c\x46\x02\x01\x01\x03\x00' > test                                                                       
✓ ~/ $ chmod +x test 
✓ ~/ $ ./test 
-bash: ./test: cannot execute binary file: Exec format error

interesting.txt

✓ [sstelfox@rippled-summer-waterfall] ~/ $ ls test
ls: cannot access 'test': No such file or directory
✓ [sstelfox@rippled-summer-waterfall] ~/ $ touch test
✓ [sstelfox@rippled-summer-waterfall] ~/ $ chmod +x test
✓ [sstelfox@rippled-summer-waterfall] ~/ $ ./test 
✓ [sstelfox@rippled-summer-waterfall] ~/ $ echo $?
0