examen linux tema 7

Compression on a file works by:

In general, for which of the following would you want to use lossless compression?

Lossy compression: (choose three)

You type gzip myfile.tar. What happens? (choose two)

How would you obtain output similar to the following? compressed uncompressed ratio uncompressed_name 278168  1016950             72.6% tags

Which command would you use to archive the Documents directory and compress it with bzip2 compression?

Which flag would you pass to tar in order to have it make a new archive?

Which command will show what is inside the compressed tarball with a name of foo.tar.gz?

In the command tar –cvjf foo.tbz a b c, what are a, b, and c?

Given the command tar –cvjf homedirs.tbz /home, which of the following are true? (choose two)

You archived your users’ directories into a file called backup.tar.gz. You then view the archive and see the filenames follow this convention: home/username/somefile

Which of the following commands will create a zipfile with the contents of your Documents directory?

Given a file called documents.zip, how can you see what’s in it without extracting the files?

Given a file called documents.zip, how can you extract just the files under ProjectX?

You try to compress a file that is already compressed. Which of the following statements is true?

Which of the following commands can be used to compress a file? (choose three)

The three main modes of tar are: (choose three)

In the command tar –czf foo.tar.gz bar, what is the purpose of the f flag?

Which two commands do the same thing? (choose two)

The _____ command is normally executed daily to update the database of all files that are on the system.