TestOut Linux Pro Practice Test 2025 – Complete Exam Prep Guide

Using the command "grep [string] [file]" is the correct choice for searching for a specific string within a file in Linux. The `grep` command is specifically designed for text searches and is highly effective for this purpose. It scans the specified file for lines that contain the specified string and outputs those lines to the terminal.

The `grep` utility is powerful and offers various options for searching, such as case insensitivity or regular expression support, making it a versatile tool for searching through text files. Its efficiency and speed in processing larger files also enhance its usability for finding specific information.

Other commands listed, such as "search" and "find," are either incorrect in this context or serve different functions. "search" is not a standard command in Linux for string searching, and "find" is primarily used for locating files and directories based on various criteria, not for searching within files for specific strings. The "locate" command, while useful for finding files based on names, does not search the contents of files, making it unsuitable for this task. Thus, "grep" stands out as the most appropriate choice.