Hello

I would want to create corrupted text-file for test purpose.

If i read the corrupted file (for example by cat-command or directly by C-software), it tells something like "corrupted 
file detected".

How this can be possible ?

I think i can edit the file by spatch-editor (hex-editor), but i dont know what exactly i should destroy from file. 
Maybe it is not possible to create corrupted file by that way ?