A raw VM image is being compressed with bzip2 and copied to a flash drive at /dev/hdb for off- site use by the marketing department. Which of the following command lines accomplishes this task?

The correct answer is B. bzip2 -c /vm/mktg.img | dd of=/dev/hdb. Option B is correct: 'bzip2 -c /vm/mktg.img' compresses the image and writes the compressed data to standard output (the -c flag). This output is piped to 'dd of=/dev/hdb', which writes the raw bytes directly to the block device. This is the correct way to compress and write an…

System Management

Question

A raw VM image is being compressed with bzip2 and copied to a flash drive at /dev/hdb for off- site use by the marketing department. Which of the following command lines accomplishes this task?

Options

Amv /vm/mkgt.img | bzip2 /dev/hdb/mkgt.img.bz2
Bbzip2 -c /vm/mktg.img | dd of=/dev/hdb
Ccp /vm/mktg.img | bzip2 /dev/hdb/mktg.img.bz2
Dcp -a -r /vm/mktg.img bzip2 /dev/hdb/mktg.img.zip

How the community answered

(42 responses)

A
5% (2)
B
71% (30)
C
14% (6)
D
10% (4)

Explanation

Option B is correct: 'bzip2 -c /vm/mktg.img' compresses the image and writes the compressed data to standard output (the -c flag). This output is piped to 'dd of=/dev/hdb', which writes the raw bytes directly to the block device. This is the correct way to compress and write an image to a raw device in one step. Options A and C misuse 'mv' and 'cp' - these commands do not write to stdout, so piping them is invalid. Option D treats 'bzip2' as a directory path argument to 'cp', which is entirely incorrect syntax.

Topics

#bzip2#dd#Piping#Device management

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