Fall 2007 CSci 553 Lab 1
Exercise 1.1
The instructor wants you to use a hitherto unknown command for
manipulating files. How would you get help on this command?
Exercise 1.2
Suppose ls shows you this:
Makefile biography.txt data enrolment.txt programs thesis
What argument(s) will make it print the names in reverse, like this:
thesis programs enrolment.txt data biography.txt Makefile
Exercise 1.3
What does the command cd ~ do? What about cd ~hpotter?
Exercise 1.4
What command will show you the first 10 lines of a file? The first 25?
The last 12?
Exercise 1.5
diff finds and displays the differences between two text files. For example,
if you modify earth.txt to create a new file earth2.txt that contains:
Name: Earth
Period: 365.26 days
Inclination: 0.00 degrees
Eccentricity: 0.02
Satellites: 1
you can then compare the two files like this:
$ diff earth.txt earth2.txt
3c3
< Inclination: 0.00
---
> Inclination: 0.00 degrees 4a5
> Satellites: 1
