Book Image

Linux Shell Scripting Cookbook, Second Edition - Second Edition

Book Image

Linux Shell Scripting Cookbook, Second Edition - Second Edition

Overview of this book

The shell remains one of the most powerful tools on a computer system — yet a large number of users are unaware of how much one can accomplish with it. Using a combination of simple commands, we will see how to solve complex problems in day to day computer usage.Linux Shell Scripting Cookbook, Second Edition will take you through useful real-world recipes designed to make your daily life easy when working with the shell. The book shows the reader how to effectively use the shell to accomplish complex tasks with ease.The book discusses basics of using the shell, general commands and proceeds to show the reader how to use them to perform complex tasks with ease.Starting with the basics of the shell, we will learn simple commands with their usages allowing us to perform operations on files of different kind. The book then proceeds to explain text processing, web interaction and concludes with backups, monitoring and other sysadmin tasks.Linux Shell Scripting Cookbook, Second Edition serves as an excellent guide to solving day to day problems using the shell and few powerful commands together to create solutions.
Table of Contents (16 chapters)
Linux Shell Scripting Cookbook
About the Authors
About the Reviewers

Logging access to files and directories

Logging of file and directory access is very helpful to keep a track of changes that are happening to files and folders. This recipe will describe how to log such accesses.

Getting ready

The inotifywait command can be used to gather information about file accesses. It doesn't come by default with every Linux distro. You have to install the inotify-tools package by using a package manager. It also requires the Linux kernel to be compiled with inotify support. Most of the new GNU/Linux distributions come with inotify enabled in the kernel.

How to do it...

Let's walk through the shell script to monitor the directory access:

#Description: Watch directory access
#Provide path of directory or file as a
rgument to script

inotifywait -m -r -e create,move,delete $path  -q 

A sample output is as follows:

$ ./ .
./ CREATE new
./ MOVED_TO news
./ DELETE news

How it works...

The previous script...