Why use echo before installing new software?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Puzzle Game Looping

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Chapters
00:00 Question
00:37 Accepted answer (Score 42)
01:44 Answer 2 (Score 2)
04:40 Thank you

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Full question
https://superuser.com/questions/1165820/...

Question links:
[Use of sh command]: https://superuser.com/questions/97614/wh...
[ROS Indigo Installation Wiki]: http://wiki.ros.org/indigo/Installation/...

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https://meta.stackexchange.com/help/lice...

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Tags
#linux #ubuntu #commandline #bash #echo

#avk47