TestOut Linux Pro Practice Test 2025 – All-in-One Guide to Master Your Certification!

Using "man -k [keyword]" is an effective way to search for the manual pages that contain a specific keyword related to a command. This search will return a list of commands and their descriptions that match the keyword, and it will typically indicate the section numbers of the manual pages where these commands can be found.

The command "man -k" essentially performs a keyword lookup across the manual page descriptions, allowing you to identify the relevant sections without directly knowing the command. This is particularly useful when you are unsure of the exact command you need or when looking for commands related to a specific topic.

The other options provide different functionalities; for example, "man -a [command]" would show all sections of the manual for a specified command, but it does not help you find out which section a command is in if you start without a command. "man [command]" gives you the manual for that specific command, assuming you already know it. The "info [command]" offers a different set of documentation for commands, which can be more comprehensive but does not relate to manual section numbers directly.