grep function - RDocumentation
Value grep(value = FALSE) returns a vector of the indices of the elements of x that yielded a match (or not, for invert = TRUE). This will be an integer vector unless the input is a long vector, when it will be …
grep command in Unix/Linux - GeeksforGeeks
Nov 3, 2025 · The grep command is one of the most useful tools in Linux and Unix systems. It is used to search for specific words, phrases, or patterns inside text files, and shows the matching lines on your …
How to use grep command In Linux / UNIX with examples
Aug 2, 2007 · Below is some standard grep command explained with examples to get you started with grep on Linux, macOS, and Unix: grep -R 'httpd' . Let us see all commands and options in details. …
grep Cheat Sheet - grep Command Line Guide
Mar 15, 2025 · With options for recursive searches, regular expressions, and output customization, grep offers flexibility for a wide range of tasks. Whether you’re filtering logs, analyzing data, or debugging …
grep (1) - Linux manual page - man7.org
This enables a calling process to resume a search. When grep stops after NUM matching lines, it outputs any trailing context lines. When the -c or --count option is also used, grep does not output a …
Linux: Recursive file searching with `grep -r` (like grep + find)
Aug 4, 2024 · Recurse in directories skip file matching PATTERN. As you’ve seen, the grep -r command makes it easy to recursively search directories for all files that match the search pattern you specify, …
grep command in Linux w/ examples
Jul 29, 2024 · When it finds a match in a line, grep copies the line to standard output or whatever output you select using options. grep was initially developed for the Unix operating system but eventually …
How to Use the grep Command on Linux - How-To Geek
Sep 10, 2023 · Recursive Searches Using grep To search through nested directories and subdirectories, use the -r (recursive) option. Note that you don't provide a file name on the command line, you must …
How to Use Grep to Find Text in Files: Easy Beginner's Guide
Dec 11, 2025 · The grep command is case-sensitive, but you can use grep -i to ignore case. To search for text in all files within a directory and its subdirectories, use grep -R to perform a recursive search.
grep Command in Linux with Examples - LinuxCapable
Nov 17, 2025 · Learn the use of the grep command in Linux through our guide, featuring practical examples that can be applied in real-world situations.