How do you track which packages were installed on Ubuntu (Linux)?

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Track title: Ocean Floor

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Chapters
00:00 Question
02:13 Accepted answer (Score 31)
04:29 Answer 2 (Score 7)
05:03 Answer 3 (Score 3)
06:38 Answer 4 (Score 2)
09:17 Thank you

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Full question
https://superuser.com/questions/6338/how...

Question links:
[10458]: https://superuser.com/questions/10458/ho...

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Tags
#linux #ubuntu #packagemanagement #aptitude

#avk47