man:tldr:9d4da

The command "man --apropos" is used to search for a keyword or a specific topic in the manual pages (man pages) of the installed software on a Linux or Unix system.

Here's an explanation of each component in the given command:

• "man" is the command to view the manual pages.
• "--apropos" is an option used to search the manual page names and descriptions for a specific search string or keyword.
• "${search_string}" is a placeholder that represents the search string or keyword which you need to replace with your actual search term.

By using this command in the terminal, you can search for the available manual pages related to a specific topic or keyword. It will display a list of manual pages that contain the search string in their names or descriptions. You can then choose the relevant manual page number to view the detailed information and documentation about that topic.