The 'grep' command allows a user to do which of the following?

The 'grep' command is a powerful utility commonly used in Unix-like operating systems for searching plain-text data sets for lines that match a regular expression or specified pattern. Its primary function is to scan the contents of one or more files and return lines that contain the search term. This makes it an invaluable tool for quickly finding specific information within large files or streams of text.

In contrast, displaying the first 10 lines of a file is typically done using the 'head' command, while streaming the entire content of a file can be accomplished with 'cat'. Navigating to another directory is handled by the 'cd' command. Understanding these distinctions highlights the specific capabilities of 'grep' and its role within text processing tasks in network programmability and other command-line operations.