CompTIA Linux+ XK0-006 (V8) Practice Question

The zgrep wrapper transparently decompresses gzip files and forwards all given options to grep. Using -l prints only the filenames that contain a match, and -i performs a case-insensitive search. Supplying the explicit pathname pattern (dump-*.sql.gz) limits the search to the required files, so no recursion is needed.

The plain grep command cannot read compressed data, the pipeline with zcat | grep loses the original filenames (grep reads from standard input), and the command that adds -r uses an option that is not supported by the traditional zgrep script and would output the matching lines instead of just the filenames.