Kind of a silly forum topic, but I don't care as it might just brighten someone's day.

I'll go first. This one is stolen from Dragon Ball Z:

You can tune a guitar, but you can't Tuna fish.

Edit: I'm a dummy. Tienshinhan didn't say guitar, he said piano.

You can tune a file system, but you cannot tune a fish.

Source: https://www.freebsd.org/cgi/man.cgi?query=tunefs&sektion=8
(This man page can be viewed on FreeBSD systems by typing "man tunefs" at the command prompt; this can also work on some other BSD-based systems, including at least older versions of Mac OS X.)

OpenBSD's variant: You can tune a file system, but you can't tune a fish.
Source: https://man.openbsd.org/tunefs.8

(I read in a book that there's apparently a comment in the man page source that warns people not to remove this joke.)

What’s man sauce got to do with it? (Freudian slip?)

On UNIX systems (this includes Linux as well as FreeBSD and even Mac OS X), each command has what's known as a man page ("man" is short for "manual"). These pages are typically written in a markup language (HTML is an example of such a language, but not what's used for man pages), and the man page then formats them for display on a screen. That markup language allows for comments, therefore there can be comments in the source code of the man page that are not displayed when you view it.

(There are tools for converting the markup language used to HTML, hence allowing those pages to be posted to the Web and viewed there.)

I am pretty sure that’s not as funny as my post, I even changed one of the letters in it for comedic purpose and still the point disappeared over the horizon for you :o)

Did you hear about that man who lost his entire left side in an accident? He's all right now!

Here's the comment: sauce:

http://cvsweb.openbsd.org/src/sbin/tunefs/tunefs.8?rev=1.27&content-type=text/x-cvsweb-markup

You can't make an omelett without eggs.

Some might say I'm a dreamer, but I'm not...

Mind is a terrible thing...

I got some shoes from my drug dealer recently, I don’t know what he laced them with, but I’ve been tripping all day!

Don't ever ask me about U-Boats, I'm an egoist.

The narcissistict opera singer: "Me me me me."

Surely you can't be serious!

I am.
And don't call me Shirley.

I'm working on a pun, but it won't be ready until it's full groan

Why did the officer arrest a duck?

Because it was selling quack. The nurses said there wasn't much left!

The pun is the worst form of humour. There is no vice-versa.