Explain xkcd: It's 'cause you're dumb.
On a UNIX-type system, users can be assigned all kinds of rights, for example access to certain directories or files, executing certain commands etcetera. The “sudo” command overrides these policies by executing the command typed behind it as if the user were an administrator (the Super User) of the system. To prohibit abuse of the command, the user must be in the "sudoers" group, and the user first must type their password before the command will be executed.
In the comic, Cueball is demanding a sandwich from a friend. Not being properly asked, the friend denies the request. Cueball then (ab)uses the sudo command on the friend, which then has no choice but to go and make the sandwich, because Cueball has all rights. The image text references this abuse, noting that an administrator should set a proper use of the command in order to control his system.
"Simon says" is a children's game in which a leader gives various commands which must be followed iff prefixed with "Simon says". Wikipedia suggests "Simon" may be the powerful lord Simon de Montfort, or a corruption of Cicero, both of whom were influential politicians of their day.
This comic was referenced in a guest comic 824.
- [Cueball is sitting on a couch, talking to a friend.]
- Cueball: Make me a sandwich.
- Friend: What? Make it yourself.
- Cueball: Sudo make me a sandwich.
- Friend: Okay.
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Note that it is more effective to write "sudo !!" to redo the last command but with sudo added to it. Agge.se (talk) (please sign your comments with ~~~~)
sudo !! outputs the previous command with sudo into your bash (other shells as well) history, so to bash what you said was "sudo make me a sandwich" not "sudo !!". lcarsos (talk) 16:46, 29 October 2012 (UTC)
sudo requires user password, not admin password, but you need to be in
sudoers file. --JakubNarebski (talk) 12:14, 15 December 2012 (UTC)
- How many people will know the difference? In a typical Ubuntu-family install with only one human user, root doesn't have a password, but the one user who does is a sudoer (and has to use
su to act as root, rather than doing so starting at login). Promethean (talk) 06:08, 30 August 2013 (UTC)
"the user first must type their password" This is not accurate. It is the default, but many domains disable that requirement.
220.127.116.11 06:47, 14 January 2015 (UTC)
I believe the original comic actually read "Sudo bang bang" instead of "Sudo make me a sandwich". Here's a link to what I think is a copy of the original. I'm not sure which of the two is actually the original. 18.104.22.168 (talk) (please sign your comments with ~~~~)
- The words "bang bang" (particularly the first B) look a bit fuzzy/pixelated compared to the rest of the text, which gives me the feeling that it was edited from this one, which is the original. Zowayix (talk) 23:03, 23 January 2014 (UTC)
- If you click on the image (on the Stack Overflow link), it leads you to http://justinsomnia.org/2006/09/sudo-bang-bang/, which says: 'This just occurred to me' [comic] 'Original comic from xkcd by Randall Munroe', implying it was indeed edited. 22.214.171.124 20:42, 11 August 2014 (UTC)
Comment: This conversation is an easter egg in Google Now on Android tablet. Using voice search to say "make me a sandwich" will give the reply "what? make it yourself", adding "sudo" will get the response "ok". I assume the Google now implementation came later and is based on xkcd. 126.96.36.199 (talk) (please sign your comments with ~~~~)
This reworked for the Make utility:
$ make sandwich
Must be root
$ sudo make sandwich
mv sandwich /etc/sandwich
sandwich installed in /etc
) 02:50, 23 August 2015 (UTC)