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Recently, while preparing for an introductory Exam on UNIX, I learnt that the manual is divided into 8 sections. While going through the manual, I found a 'games' section (6). I saw a program called 'espdiff' and wanted to try it...

Here is a sample run: $ espdiff Please concentrate... No brainwave activity detected. Aborting. $

I don't understand what this means and suprisingly, the manual didn't help also. Could you explain what this game is about and how to use it?

mrsauravsahu
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    [It's more of a joke than a game](https://linux.die.net/man/1/espdiff) -- [here's the source code](https://github.com/caldwell/patchutils/blob/master/espdiff.in). –  Jun 23 '17 at 19:34
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    Also, take note of an important limitation (from `man espdiff`): *Do not use this program while sleep-walking, or before your first cup of coffee.* – costaparas Jan 29 '21 at 14:21

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espdiff is one Ubuntu's Easter-eggs since Ubuntu 10.04 which comes with it's man page which doesn't really explain any thing but some comics . it's part of the patch-utils package, just read the man page it's only 56 pages

man espdiff
Abdelrahman Saleh
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  • Thank you, this meant a lot for a person who looked at it as a rouge file. Stinks it had to get closed as off topic – Joe Jun 23 '19 at 06:57
  • @Joe, it got closed as off-topic because it's, well, *off-topic!* SO is a *programming* Q&A site and this question has nothing at all to do with programming. – paxdiablo May 16 '21 at 23:17
  • This is fake news, the espdiff man page is only a page long but if you can get into the right mode of operation you can access a special set of instructions that help you to make sense of the espdiff "package management utility". Its not a game, but helps users who want to connect to systems that are a bit too complex for even Linux operating systems to deal with. – Stephen Duffy Sep 05 '22 at 07:56