Book Image

CompTIA Linux+ Certification Guide

By : Philip Inshanally
Book Image

CompTIA Linux+ Certification Guide

By: Philip Inshanally

Overview of this book

The Linux+ certification provides a broad awareness of Linux operating systems, while giving professionals an upper hand in the IT industry. With this certification, you’ll be equipped with the all-important knowledge of installation, operation, administration, and troubleshooting services. This CompTIA Linux+ Certification Guide will give you an overview of the system architecture. You’ll understand how to install and uninstall Linux distributions, followed by working with various package managers. You’ll then move on to manipulating files and processes at the command-line interface (CLI) and creating, monitoring, killing, restarting, and modifying processes. As you progress, you’ll be equipped to work with display managers and learn how you can create, modify, and remove user accounts and groups, as well as understand how to automate tasks. The last set of chapters will help you configure dates and set up local and remote system logging. In addition to this, you’ll explore different internet protocols, and delve into network configuration, security administration, Shell scripting, and SQL management. By the end of this book, you’ll not only have got to grips with all the modules you need to study for the LX0-103 and LX0-104 certification exams, but you’ll also be able to test your understanding with practice questions and mock exams.
Table of Contents (23 chapters)
19
Mock Exam - 1
20
Mock Exam - 2

Pipes and redirects

Often, when we are viewing output from various commands, it is a bit fuzzy. Fear no more; we have what is known as pipes and redirects. Basically, when working with pipes (|), we take the output of a command and pass it as the input of another command. Redirects (>, <, >>, 2>, and 2>&1) are similar to taking output from a command, but this time, we send it to a location, such as a file or another location, to name a few.

To begin, let's use the ls command. The code is as follows:

[root@localhost philip]# ls /etc
abrt default gdbinit.d kernel networks rc4.d subuid-
adjtime depmod.d gdm krb5.conf nfs.conf rc5.d sudoers
aliases dhcp geoclue krb5.conf.d nfsmount.conf rc6.d sudoers.d
alsa...