“Dad, what are clouds made of?”/“Linux servers, mostly.”

A joke about cloud computing was posted on Twitter on May 19, 2017:
 
SON: Daddy, what are clouds made of?
DAD: Linux servers mostly.
 
The joke has been printed on several images.
 
       
Wikipedia: Cloud computing
Cloud computing is an information technology (IT) paradigm, a model for enabling ubiquitous access to shared pools of configurable resources (such as computer networks, servers, storage, applications and services),  which can be rapidly provisioned with minimal management effort, often over the Internet. Cloud computing allows users and enterprises with various computing capabilities to store and process data either in a privately-owned cloud, or on a third-party server located in a data center - thus making data-accessing mechanisms more efficient and reliable. Cloud computing relies on sharing of resources to achieve coherence and economy of scale, similar to a utility.
 
Twitter
mezghani.mehdi‏
@AMDX64
- Daddy, what are clouds made of ?
- Linux servers, mostly
12:00 PM - 19 May 2017
 
Twitter
walther smith‏
@walthersmith
Son: Daddy, what are clouds made of?
Dad: Linux servers mostly
4:10 PM - 19 May 2017
 
Starecat.com
DADDY WHAT ARE CLOUDS MADE OF? LINUX SERVERS MOSTLY
Published: 20 May 2017
In categories: Drawings, Kids, Questions, Silly, Technology, Trolling, Word play
 
Reddit—Programmer Humor
What are clouds made of? (i.redd.it)
submitted May 21, 2017 by faisalhassanx
     
Reddit—Jokes
Daddy, what are clouds made of?
submitted May 23, 2017 by haridownvote
Linux servers, mostly.
   
Twitter
Bob Kostic‏
@causticbob
Daddy, what are clouds made of?
Linux servers, mostly.
3:03 PM - 5 Jul 2017
 
Reddit—Jokes
Daddy, what are clouds made of?
submitted July 31, 2017 by supercoooldudewithab
Linux servers, mostly.
 
Reddit—Jokes
Dad, what are clouds made of?
submitted October 9, 2017 by LifelessBlatancy
Linux servers, mostly.