010-100 Question #83: Real Exam Question with Answer & Explanation

The correct answer is A. man -k copy. 'man -k' performs a keyword search across all manual page names and short descriptions, equivalent to the 'apropos' command.

Question

Which command line can be used to search help files that mention the word "copy"?

Options

Aman -k copy
Bwhatis copy
Cman copy
Dcopy help
Ecopy --help

Explanation

'man -k' performs a keyword search across all manual page names and short descriptions, equivalent to the 'apropos' command.

Common mistakes.

B. 'whatis copy' displays only the one-line description for a command named exactly 'copy', and does not search across all man pages for keyword matches.
C. 'man copy' attempts to open the man page for a command specifically named 'copy', rather than searching all pages for the keyword.
D. 'copy help' is not a valid Linux shell command; 'copy' is a Windows command and does not exist natively in Linux.
E. 'copy --help' is not valid because 'copy' is not a standard Linux command, so no --help flag exists for it.

Concept tested. Searching manual pages with man -k (apropos)

Reference. https://man7.org/linux/man-pages/man1/man.1.html

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