grep

Grep is a command-line tool used to search for specific text patterns within files or streams of text. Imagine it as a highly efficient filter: you tell it what word or pattern you're looking for, and it scans through the content, highlighting or showing only the parts that match your criteria. It's commonly used by programmers and system administrators to quickly locate information within logs, source code, or large documents, saving time compared to manual searching. Grep supports complex pattern matching using regular expressions, making it a powerful tool for text analysis and data retrieval tasks.