Grep Pocket Reference is the first guide devoted to grep, the powerful utility program that helps you locate content in any file on a Unix or Linux system. Several applications use grep, from mail filtering and system log management to malware analysis and application development, and there are many other ways to use the utility. This pocket reference is ideal for system administrators, security professionals, developers, and others who want to learn more about grep and take new approaches with it.With Grep Pocket Reference, you will: learn methods for filtering large files for specific content; acquire information not included in the current grep documentation; get several tricks for using variants such as egrep; keep key information about grep right at your fingertips; and, find the answers you need about grep quickly and easily. If you're familiar with this utility, Grep Pocket Reference will help you refresh your basic knowledge, understand rare situations, and find more efficient uses. If you're new to grep, this book is the best way to get started.