Minor additions

[GreatEmerald]

From Yneke:

• Question: I could not find the /etc directory and the text files in the systems

o Should these be their already/prepared or should the students make them theirself?

• Suggestion:

o Add a question about how to implement wildcards

o Convert a couple of examples into a small exercise

• Suggestion:

o Just before question 5 a small script “variables.sh” is created where the gender of the user is asked. Perhaps we could include ‘nonbinary’ or ‘other’ as a third suggestion (to become more inclusive)