I wrote this a few years back for LinuxQuestions.org. It was around 2004 from memory, and majority of the mail servers in Internet land only allowed for 2MB file attachments. This has now change, but I thought I’d post the article anyway.
There always comes a time, where you wish that file was only a few kilobytes/megabytes smaller. Whether it be so it can fit onto your floppy disk, CD-R etc, or so you can meet the attachment limit on an e-mail server. This isn’t really a command that you would use everyday, but it might come in handy.