#LINUX FIND WORD IN FILE RECURSIVE HOW TO#

This is heavily used when performing troubleshooting operations on Linux systems because the kernel will write to its buffer ring when starting or booting up.

#LINUX FIND WORD IN FILE RECURSIVE HOW TO#

Note : if you are not sure about how to use pipes on Linux, here’s a complete guide on input and output redirection.Īnother great usage of the grep command is to inspect the Linux Kernel buffer ring. If you are interested in bash processes for example, you can type the following command $ ps aux | grep bash

You can pipe the “ ps” command with the “ grep” command in order to filter the processes you are interested in. $ grep root /etc/passwdĪnother very popular way of using the grep command is to look for a specific process on your Linux system.Īs explained in one of our previous tutorials, you have to use the “ ps” command in order to list all the processes currently running on your system. In order to find the root account in a specific file, simply enter your text and the file you want to search into. On Linux, as you already probably know it, user accounts are listed in a specific file called the passwd file. There are complex options that can be used with grep, but let’s start with a set of very quick examples.

This is a great way to remember the grep syntax and the find syntax at the same time but the find syntax is the exact opposite : path first and expression after. In order to remember the syntax of the grep command, just remember that grep can be written as grEP which means that the expression comes before the path. Before listing and detailing all the options provided by grep, let’s have a quick way to memorize the syntax of the grep command.

Linux find word in file recursive