Generate fake files of any size in macOS and Linux

Oftentimes when working with applications, for the sake of testing things out we need placeholder files. For instance, if we have a file upload functionality, we may want to test it for a certain file type of a certain size. The mkfile utility in macOS The truncate utility in Linux So, if we want to test if the file upload functionality restricts uploading PDF files to not more than 10 MBs, we need a PDF file with a size of more than 10 MBs for it to fail. It could be possible, we may not have...