Changes

<li>[https://matrix.senecacollege.ca/~chris.johnson/ULI101/uli101_command_practice_9.docx Linux Practice - Regular Expressions]</li>

<li>[http://czegel.com/seneca/uli101/lectures/Lecture8.html Les Czegel's Week 9 Notes]</li>

<li>[https://youtu.be/-2pwLHcvCsU Grep]</li>

<li>[https://youtu.be/5uRM8bh0ipU Regex]</li>