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A Practical Guide to Red Hat® Linux® 8 by Mark G. Sobell

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Advanced Exercises

15.Recreate the colors.1 and colors.2 files used in Figure 3-7 on page 68. Test your files by running diff –u on them, and see whether you get the same results as in the figure.
16.Use the pine mailer to create a new folder named tmp-mail. Then describe how to move a message from the folder sent-mail to the folder tmp-mail.
17.Try giving these two commands:
$ echo cat 
$ cat echo
								

Explain the differences between them.

18.Repeat exercise 8 using the file phone.gz, a compressed version of the list of names and phone numbers. Try to consider more than one approach to each question, and explain how you chose your answer.
19.Find existing files or create files that
  1. gzip compresses by more than 80 percent

  2. gzip compresses by less than ...

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