Troubleshooting Ubuntu Server : make life at the office easier by building resilient Ubuntu Server systems / Skanda Bhargav.

Format:

Book

Author/Creator:

Bhargav, Skanda, author.

Series:

Community experience distilled.

Community experience distilled

Language:

English

Subjects (All):

Ubunti (Electronic resource).

Linux.

Operating systems (Computers).

Computer science.

Physical Description:

1 online resource (288 p.)

Edition:

1st ed.

Other Title:

Make life at the office easier by building resilient Ubuntu Server systems

Place of Publication:

Birmingham : Packt Publishing, 2015.

Summary:

Make life at the office easier for server administrators by helping them build resilient Ubuntu server systems About This Book Tackle the issues you come across in keeping your Ubuntu server up and running Build server machines and troubleshoot cloud computing related issues using Open Stack Discover tips and best practices to be followed for minimum maintenance of Ubuntu Server 3 Who This Book Is For This book is for a vast audience of Linux system administrators who primarily work on Debian-based systems and spend long hours trying fix issues with the enterprise server. Ubuntu is already one of the most popular OSes and this book targets the most common issues that most administrators have to deal with. With the right tools and definite solutions, you will be able to keep your Ubuntu servers in the pink of health. What You Will Learn Deploy packages and their dependencies with repositories Set up your own DNS and network for Ubuntu Server Authenticate and validate users and their access to various systems and services Maintain, monitor, and optimize your server resources and avoid tremendous load Get to know about processes, assigning and changing priorities, and running processes in background Optimize your shell with tools and provide users with an improved shell experience Set up separate environments for various services and run them safely in isolation Understand, build, and deploy OpenStack on your Ubuntu Server In Detail Ubuntu is becoming one of the favorite Linux flavors for many enterprises and is being adopted to a large extent. It supports a wide variety of common network systems and the use of standard Internet services including file serving, e-mail, Web, DNS, and database management. A large scale use and implementation of Ubuntu on servers has given rise to a vast army of Linux administrators who battle it out day in and day out to make sure the systems are in the right frame of operation and pre-empt any untoward incidents that may result in catastrophes for the businesses using it. Despite all these efforts, glitches and bugs occur that affect Ubuntu server's network, memory, application, and hardware and also generate cloud computing related issues using OpenStack. This book will help you end to end. Right from setting up your new Ubuntu Server to learning the best practices to host OpenStack without any hassles. You will be able to control the priority of jobs, restrict or allow access users to certain services, deploy packages, tackle issues related to server effectively, and reduce downtime. Also, you will learn to set up OpenStack, and manage and monitor its services while tuning the machine with best practices. You will also get to know about Virtualization to make services serve users better. Chapter by chapter, you will learn to add new features and functionalities and make your Ubuntu server a full-fledged, production-ready system. Style and approach This book contains topic-by-topic discussion in an easy-to-understand language with loads of examples to help you take care of Ubuntu Server. Plenty of screenshots will guide you through a step-by-step approach."

Contents:

Cover; Copyright; Credits; About the Author; About the Reviewer; www.PacktPub.com; Table of Contents; Preface; Chapter 1: Package Management; Getting started with packages; Package; Repository; The .deb packages; Dependency; Open source; Using dpkg for package management; Understanding the apt-get package management tool; Updating the repository list with the apt-get update command; Installing a package with the apt-get install command; Upgrading a package with the apt-get upgrade command; Cleaning with the apt-get clean command; Purging a package with the apt-get purge command

Fixing unsuccessful installations with the apt-get -f commandChecking for broken dependencies with the apt-get check command; The apt-cache tool; Searching for a package with the apt-cache search command; Package management with aptitude; Configuration and extra repositories; Resolving the ""failed to get"" error; Downloading software from an outside repository; Automatic updates; Security updates; Kernel updates; Application updates; The unattended-upgrades package; Creating a repository mirror; Setting up a mirror machine; Configuring the /etc/apt/mirror.list file; Using the local mirror

SummaryChapter 2: Networking and DNS; Networking concepts; IP addressing; DHCP client for dynamic addresses; Assigning a static IP address; DHCP; Installation; Configuration; Network sniffing with tcpdump; Capturing packets from eth0; Saving the tcpdump results in a file; Reading packets saved in a file by tcpdump; Readable timestamps in packets; Reading packets of a specific protocol; Reading packets on a specific port; Reading TCP packets between two hosts; Binding and bonding; Binding; Bonding; DNS; Setting up DNS; Setting up primary and secondary DNS servers; The hints file - zone "".""

The local host file - zone ""0.0.127.in-addr.arpa""The reverse zone file - zone ""24.126.10.in-addr.arpa""; The primary zone file - zone ""ubuntuserver.org""; The primary zone file; The reverse zone file; PTR records; Summary; Chapter 3: Network Authentication; OpenLDAP; Installation; Populating the database; Logging; Access control; Kerberos; Installation; Database setup; Setting up the Kerberos client; Kerberos SSH and logon; Integrating LDAP with Kerberos; Installation; Database setup; OpenSSH, public, and private keys - passwordless SSH; The SSH client and the server

Setting up passwordless SSHDisabling password authentication; Allowing or denying users to SSH; Greeting users with a banner; Summary; Chapter 4: Monitoring and Optimization; Nagios; The Nagios setup; Adding another host in Nagios; Nagios templates; Nagios hostgroups and services; Nagios setup alerts; Writing a Nagios plugin; The NRPE plugin; Enabling external commands; Puppet; Installing Puppet; Setting up the client; Setting up the manifest; ClusterSSH; Summary; Chapter 5: Process Management; The basics of process management; and PPID; pidof; Parent and child; fork() and exec(); exec

ps

Notes:

Description based upon print version of record.

Includes bibliographical references and index.

Description based on online resource; title from PDF title page (ebrary, viewed January 12, 2016).

ISBN:

9781782175025

1782175024