IT244: Introduction to Linux/UNIX – Fall 2010
Homework 3
Due: Monday, 10/18/2010
Chapters 4 & 6:
NOTE: Remember to go to the man pages or look online in order to find
some of the answers. The book is vague on some of these issues.
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1) (10 points) Q. 10.
2) (10 points) Q. 11.
3) (10 points) Q. 12.
 In other words, if you give the command “ls –l” in any
directory, you will see a .. entry. What is this entry? And if
you give the command “ls –l /”, there will be a .. entry shown
in the root directory . What is this entry?
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4) (10 points) Q. 1.
5) (10 points) Q. 2.
 Add to this the question, what is the difference between
these two ways of writing? In other words, why are there
two ways? We are not talking about the :x option, which is
not covered in the book.
6) (10 points) Q. 3.
 Part (a) is asking: how do you move to the final period (.)
after the word “time” on the last line of the paragraph using
only one command?
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7) (10 points) Q. 4.
 When explaining what happens, please tell me why it
happens. By that I mean, explain why the process of giving
the command x and then the command p causes the
outcome to happen.
8) (10 points) Q. 5.
1
9) (10 points) Q. 6.
 Again, this is a single command
10) (10 points) Q. 7.
 Make sure that you substitute every occurrence, even
multiple occurrences on the same line.
11) (10 points) Q. 8. – Extra Credit
 Here you have two scenarios, and two different command
possibilities. The first scenario is that you haven’t yet saved
your changes using :w. In this case, both commands are
possible to be used here. In the second scenario, you saved
your changes and then realized you had made this mistake,
but the good thing is that you haven’t yet quit out of vim. In
this case, you have one of the commands as a possible fix.
Give both commands and tell what the difference is.
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