Linux Beginner

What is Grep?

A command-line utility for searching plain-text data for lines matching a regular expression pattern.

Grep (Global Regular Expression Print) is one of the most used Linux commands. Basic usage: grep "pattern" file. Common flags include -i (case insensitive), -r (recursive), -n (line numbers), -v (invert match), and -c (count).

Extended grep (grep -E or egrep) supports advanced regex. Grep is essential for log analysis, code searching, and text processing. Modern alternatives include ripgrep (rg) which is significantly faster.

Related Terms

A text file containing a series of shell commands that are executed sequentially by the Bash interpreter.

A special file that acts as a shortcut pointing to another file or directory in the filesystem.

A versatile command-line tool for transferring data using various network protocols, commonly used for API testing.

A running instance of a program, with its own memory space, process ID, and system resources.

The primary command for managing systemd services, including starting, stopping, enabling, and checking service status.

A system for limiting the amount of disk space or number of files that individual users or groups can consume on a filesystem.

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