Image Credits
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“M51” galaxy picture
https://www.nasa.gov/mission_pages/chandra/multimedia/photos07-136.html
Datasets
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Untroubled Spam Archive, by Bruce Guenter.
https://archive.org/details/untroubled_spam_archive (alternative source)
“This archive is provided for the purposes of researching behavior of spammers and development of new spam management techniques. Permission is hereby granted to use this archive without restriction.”
Lessons Materials
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Portions of the lessons were taken from Software Carpentry’s UNIX shell lesson,
http://swcarpentry.github.io/shell-novice
The general structure and selection of the UNIX commands introduced in this lesson also were drawn from that lesson.