Which of the following commands will print the last 10 lines of a text file to the standard output?
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A. B. C. D.D
The correct answer is D. tail -n 10 filename
Explanation:
The tail command is used to display the last part of a file. By default, it displays the last 10 lines of the file, but this can be changed with the -n option.
The option -n 10 specifies that we want to display the last 10 lines of the file.
The cat command (option A) displays the entire file, with or without line numbers depending on the option used. So, cat -n 10 filename would display the entire file with line numbers, starting from line 10.
The dump command (option B) is used for backing up file systems, and it is not used for displaying the contents of a file.
The head command (option C) is used to display the first part of a file, not the last. The -n option can be used to specify the number of lines to display.
Therefore, option D, tail -n 10 filename, is the correct answer to display the last 10 lines of a text file to the standard output.