Useful if you've just received an email that says it has attachments but you can't get them out (as I just did!). View the raw source of the email, copy the Base64 encoded text, drop in to a file, and run through this. The output will be the binary (or ascii) attachment. perl -MMIME::Base64 [...]

dd if=/dev/zero of=dummy.file bs=1000000 count=1 This will generate a 1Mb (approx) file. Useful for tests. In my particular case, I'm trying to delay the DOM ready event in JavaScript - so I'm going load a large file in a script tag - which will load before the DOM ready is fired. To delay the DOM [...]