What does the 'grep' command do in the context of file management in Linux?

• A. Lists all files in a directory
• B. Deletes a directory
• C. Searches for specific text
• D. Copies a file

Answer: (C)

The 'grep' command in Linux is primarily used to search for specific text or patterns within files. It stands for "Global Regular Expression Print," and it scans through the content of files to find matches for the criteria specified by the user.

For example, if a user wanted to find all occurrences of the word "error" in a log file, they could use 'grep' followed by the word "error" and the name of the log file. The command would then output all lines from that file containing the specified text. This makes 'grep' a powerful tool for analyzing logs, searching through code, and performing text-based data manipulation.

The other options pertain to different functionalities: listing files in a directory is handled by commands like 'ls,' deleting a directory is done with the 'rmdir' or 'rm -r' commands, and copying files is executed using the 'cp' command. Thus, the essence of 'grep' is distinctly established in its capability to search and filter text content, making the choice of it being the command that searches for specific text the most accurate.