Showing posts with label sysadmin. Show all posts
Showing posts with label sysadmin. Show all posts

Pro Python System Administration Review

Pro Python System Administration
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Pro Python System Administration Review"Pro Python System Administration" by Rytis Sileika is a surprisingly
good book. First and foremost, it is not a cookbook with a sysadmin
slant. 'Instead, it is organized as fully-worked-out sysadmin
problems that show how to use powerfully Python features (usually
extensions). The author succeeds in covering both a wide range of
problems and a reasonable range of tools.
Whereas some authors specialize in interesting command-line tools,
Sileika aims at administrative systems. Some of the problems he
covers are expected (such as automating the hard parts of Apache
configs and reporting stats), but others make the book more
interesting to read. The Amazon EC2/S3 section was a nice surprise,
as were the in-depth chapters on IP address allocation.
The tools covered are fairly standard, but the author pulls out some
elegant uses for some of them, such as advanced web site availability
that requires HTML parsing and database optimization with MySQL.
Basic understanding of Django is assumed but the sections that use it
hold up adequately for Django novices.
Overall, this book is probably a good addition to the shelves of most
sysadmins who are also Python-slingers.
Pro Python System Administration OverviewA practical guide to using python for unix system administration tasks. Python is rapidly becoming popular for system administration and is used to automate such tasks by many large companies, including Google. This book will show systems administrators how they can improve productivity by using python.

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Using Samba: A File and Print Server for Linux, Unix & Mac OS X, 3rd Edition Review

Using Samba: A File and Print Server for Linux, Unix and Mac OS X, 3rd Edition
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Using Samba: A File and Print Server for Linux, Unix & Mac OS X, 3rd Edition ReviewI'd been wanting to set up Samba on my LAN for quite a while, but I just couldn't find decent documentation on it. I even e-mailed O'Reilly with the suggestion of making a Samba book and was very happy to be told that one was on its way. This book not only covers Samba and its configuration, but also explains it's protocol SMB/CIFS very well. I was able to breeze through the book in a short time and have Samba up and running perfectly within a week. O'Reilly lives up to it's reputation with this one.Using Samba: A File and Print Server for Linux, Unix & Mac OS X, 3rd Edition Overview

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Linux Administration Handbook (2nd Edition) Review

Linux Administration Handbook (2nd Edition)
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Linux Administration Handbook (2nd Edition) ReviewThe first edition of Unix System Administration was a classic. The updated versions have been split into a linux-only version and the original, pan-Unix treatment (including Linux--just not as many variants of Linux as this book covers). I bought the Linux one, but now I wish I had the updated pan-Unix book. The authors' strength is their knowledge of Unix fundamentals, not the (ever-changing) details of various Linux distros. You're better off learning from them how vendor Unices are different in major ways from each other and from Linux. Finally, the authors don't seem nearly as well informed about Linux as they do about the older Unices. While their older book's advice was bulletproof, in this one they miss some important information. The most serious example is their recommendation to use 'dump' for filesystem backups, when Linux Torvalds has explicitly announced that it's not safe to use. 90% of this book is the same as the Unix book, so it's not a loss either way, but I'd recommend you get your Linux info fresh off the net, or in some other book series that's updated more frequently.Linux Administration Handbook (2nd Edition) Overview"As this book shows, Linux systems are just as functional, secure, and reliable as their proprietary counterparts. Thanks to the ongoing efforts of thousands of Linux developers, Linux is more ready than ever for deployment at the frontlines of the real world. The authors of this book know that terrain well, and I am happy to leave you in their most capable hands."—Linus Torvalds"The most successful sysadmin book of all time—because it works!"—Rik Farrow, editor of ;login:"This book clearly explains current technology with the perspective of decades of experience in large-scale system administration. Unique and highly recommended."—Jonathan Corbet, cofounder, LWN.net"Nemeth et al. is the overall winner for Linux administration: it's intelligent, full of insights, and looks at the implementation of concepts." —Peter Salus, editorial director, Matrix.net
Since 2001, Linux Administration Handbook has been the definitive resource for every Linux® system administrator who must efficiently solve technical problems and maximize the reliability and performance of a production environment. Now, the authors have systematically updated this classic guide to address today's most important Linux distributions and most powerful new administrative tools.

The authors spell out detailed best practices for every facet of system administration, including storage management, network design and administration, web hosting, software configuration management, performance analysis, Windows interoperability, and much more. Sysadmins will especially appreciate the thorough and up-to-date discussions of such difficult topics such as DNS, LDAP, security, and the management of IT service organizations.

Linux® Administration Handbook, Second Edition, reflects the current versions of these leading distributions:

Red Hat® Enterprise Linux®
FedoraTM Core
SUSE® Linux Enterprise
Debian® GNU/Linux
Ubuntu® Linux

Sharing their war stories and hard-won insights, the authors capture the behavior of Linux systems in the real world, not just in ideal environments. They explain complex tasks in detail and illustrate these tasks with examples drawn from their extensive hands-on experience.


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LDAP System Administration Review

LDAP System Administration
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LDAP System Administration ReviewThe book starts with a section on a brief introduction of LDAP before moving in LDAPv3 overview. OpenLDAP takes two chapters, then a section of chapters on Application Integration. Letting LDAP replace NIS, integrating with email, Unix and LDAP, LDAP interoperability and LDAP and Perl finish the chapters off. There are some appendixes that include some of the common Attributes and Objects also.
If you are using Windows and some LDAP application this book does not contain a lot of information for you specific to the OS, but is a great reference for LDAP overall. Most of the code examples rely on Unix understandings. The review of access and OpenLDAP applies directly to numerous systems in understanding how rights are applied.
Replication and referrals is a great topic that is covered well for the beginner. For someone wanting advanced architecture ideas and designs, this chapter does not go deep enough for you. But I enjoyed it still letting me review and pick up a few items I was unaware of.
LDAP administrators that are just starting out, or even ones that have been doing LDAP for some time and need to secure or expand the directory infrastructure could benefit from this book.LDAP System Administration Overview
Be more productive and make your life easier. That's what LDAP System Administration is all about.

System administrators often spend a great deal of time managing configuration information located on many different machines: usernames, passwords, printer configurations, email client configurations, and network filesystem configurations, to name a few. LDAPv3 provides tools for centralizing all of the configuration information and placing it under your control. Rather than maintaining several administrative databases (NIS, Active Directory, Samba, and NFS configuration files), you can make changes in only one place and have all your systems immediately "see" the updated information.

Practically platform independent, this book uses the widely available, open source OpenLDAP 2 directory server as a premise for examples, showing you how to use it to help you manage your configuration information effectively and securely. OpenLDAP 2 ships with most Linux® distributions and Mac OS® X, and can be easily downloaded for most Unix-based systems. After introducing the workings of a directory service and the LDAP protocol, all aspects of building and installing OpenLDAP, plus key ancillary packages like SASL and OpenSSL, this book discusses:

Configuration and access control
Distributed directories; replication and referral
Using OpenLDAP to replace NIS
Using OpenLDAP to manage email configurations
Using LDAP for abstraction with FTP and HTTP servers, Samba, and Radius
Interoperating with different LDAP servers, including Active Directory
Programming using Net::LDAP
If you want to be a master of your domain, LDAP System Administration will help you get up and running quickly regardless of which LDAP version you use. After reading this book, even with no previous LDAP experience, you'll be able to integrate a directory server into essential network services such as mail, DNS, HTTP, and SMB/CIFS.

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The Practice of System and Network Administration, Second Edition Review

The Practice of System and Network Administration, Second Edition
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The Practice of System and Network Administration, Second Edition ReviewGood sysadmins know the technical details. They can resurrect a dead server, understand the intricacies of sendmail or the Windows registry, and recite all of the types of DNS records by heart. They own copies of the UNIX System Administration Handbook and refer to them regularly. They are good sysadmins, and will contribute solidly at an intermediate level.
Great sysadmins know all of that and what is in this book. They are the ones who go on to become the senior sysadmins and consultants, have fabulous careers, and are respected by their bosses, co-workers, and customers.
There is much more to a technical job than simply the technical skills. Don't buy this book to learn how to run a system or you will be disappointed. Do, however, buy it to learn how to be an effective professional systems administrator.
It is also useful for a manager of sysadmins who is either non-technical, or has never been a sysadmin himself, as it is a good introduction to the issues and concerns that sysadmins need to face.
Limoncelli and Hogan cover many topics, including:
- Trouble ticket systems
- Desktops and Servers (how they're the same, differ, etc.)
- Administrative networks (why bother?)
- Requirements (gathering, tracking, etc.)
- Standards and centralization of services
- How to do debugging (not "you see this problem, do this" but rather learning the process of doing good debugging)
- Fix things once, not over and over again
- Security policies (including management and organizational issues for a variety of organizational profiles)
- Disaster Recovery (again, not how to backup data, but why you'd want to, legal issues, etc.)
- Systems Administration Ethics
- Change management and revision control
- Maintenance windows: what they are and why they're good for both you and your users
- Centralization versus Decentralization
- Helpdesks: sizing, scope, processes, escalation, etc.
- Data centers (many physical facility concerns that sysadmins don't often think of, including how to move a datacenter)
- Managing non-OS software (commercial and free)
They will help you answer questions like
- Does server hardware really cost more? Do we go with a few expensive servers or many cheap ones?
- What does "redundancy" actually mean?
- Why would we spend money on backups? There's never been an outage...
- What do I do when asked to do something illegal?
- How do I communicate and schedule large system changes?
- How do I do a safe server upgrade?
- They want to decentralize the sysadmin group -- what do we do?
- How do we move our datacenter?
- What sort of policy issues are there with email?
- How do I deal with my customers abusing printers?
- What do we have to worry about if we're implementing remote access (e.g. dialup modem banks) for our users?
Finally, they close with an entire section on Management:
- How to deal with cost centers, management chains, hiring, customer support, and outsourcing.
- How to manage your customers perceptions and your team's visibility
- How to manage your own happiness (time management, communication, professional development, managing your manager, etc.)
- How to be a technical manager, how to work with non-technical managers, manage your own career growth, etc.
- How to hire good sysadmins, recruiting, interviewing, soft skills, technical skills, employee retention, etc.
- The special concerns around how to fire sysadmins (often problematic, given their higher level of access)
They even have a chapter for non-technical managers who are in charge of sysadmins (this entire book would be very useful to give to a non-technical manager who doesn't really 'get it'.)
The book closes with three appendixes:
A. The Many Role of a System Administrator
B. What to Do When...
C. Acronyms
Appendix B is particularly useful, answering a wide variety of questions with solid, practical answers.
The skills and concepts in this book are the make-or-break in many careers. They turn you from just another sysadmin into a star performer, sensitive to your customers and the business, able to interact with a wide spectrum of people.The Practice of System and Network Administration, Second Edition Overview
The first edition of The Practice of System and Network Administration introduced a generation of system and network administrators to a modern IT methodology. Whether you use Linux, Unix, or Windows, this newly revised edition describes the essential practices previously handed down only from mentor to protégé. This wonderfully lucid, often funny cornucopia of information introduces beginners to advanced frameworks valuable for their entire career, yet is structured to help even the most advanced experts through difficult projects.

The book's four major sections build your knowledge with the foundational elements of system administration. These sections guide you through better techniques for upgrades and change management, catalog best practices for IT services, and explore various management topics. Chapters are divided into The Basics and The Icing. When you get the Basics right it makes every other aspect of the job easier--such as automating the right things first. The Icing sections contain all the powerful things that can be done on top of the basics to wow customers and managers.

Inside, you'll find advice on topics such as

The key elements your networks and systems need in order to make all other services run better
Building and running reliable, scalable services, including web, storage, email, printing, and remote access
Creating and enforcing security policies
Upgrading multiple hosts at one time without creating havoc
Planning for and performing flawless scheduled maintenance windows
Managing superior helpdesks and customer care
Avoiding the "temporary fix" trap
Building data centers that improve server uptime
Designing networks for speed and reliability
Web scaling and security issues
Why building a backup system isn't about backups
Monitoring what you have and predicting what you will need
How technically oriented workers can maintain their job's technical focus (and avoid an unwanted management role)
Technical management issues, including morale, organization building, coaching, and maintaining positive visibility
Personal skill techniques, including secrets for getting more done each day, ethical dilemmas, managing your boss, and loving your job
System administration salary negotiation

It's no wonder the first edition received Usenix SAGE's 2005 Outstanding Achievement Award!

This eagerly anticipated second edition updates this time-proven classic:

Chapters reordered for easier navigation
Thousands of updates and clarifications based on reader feedback
Plus three entirely new chapters: Web Services, Data Storage, and Documentation


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Nagios: System and Network Monitoring Review

Nagios: System and Network Monitoring
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Nagios: System and Network Monitoring ReviewI recently received review copies of Pro Nagios 2.0 (PN2) by James Turnbull and Nagios: System and Network Monitoring (NSANM) by Wolfgang Barth. I read PN2 first, then NSANM. Both are excellent books, but I expect potential readers want to know which is best for them. The following is a radical simplification, and I could honestly recommend readers buy either (or both) books. If you are completely new to Nagios and want a very well-organized introduction, I recommend PN2. If you are somewhat familiar with Nagios and want detailed descriptions of a wide variety of Nagios plug-ins, I recommend NSANM.
NSANM strengths lie in the depth of coverage of certain elements when compared to PN2. PN2 devotes 7 pages to host checks, while NSANM's Ch 7 offers 21 pages. PN2 supplies 8 pages on service checks, but NSANM's Ch 6 gives 46 pages. This level of detail can be very useful. For example, NSANM's explanation of check_squid also shows to to configure Sguid to allow access to its cache manager.
NSANM shares more information on certain background protocols like SNMP. PN2's SNMP section is about 7 pages, whereas NSANM's Ch 11 is 36 pages. NSANM demonstrates more aspects of Nagios' Web interface and the CGI programs generating pages. I thought author Wolfgang Barth made very effective use of diagrams, like the network topology explanation in Ch 4, the service checks in Ch 5, and notification in Ch 12.
NSANM includes some material not mentioned in PN2, like using Nagios with Cygwin. Sometimes the books are very complementary, as shown by PN2's discussion of NSClient++ and NSANM's overview of NSClient and NC_Net.
NSANM is lacking coverage of security, redundancy, and failover, however. PN2 does address these critical issues. Beware the some of the "chapters" in NSANM are very short -- like Ch 8 (2 pages!) and Ch 19 (barely 6 pages). I think short sections like those should have been integrated into longer chapters or moved into the appendices.
Overall, NSANM is a very good book. I believe new Nagios readers should read PN2, and strongly consider NSANM as a complementary reference volume.Nagios: System and Network Monitoring Overview
Good system administrators recognize problems long before anyone asks, "Hey, is the Internet down?" Nagios, an open source system and network monitoring tool, has emerged as the most popular solution for sys admins in organizations of all sizes. It's robust but also complex, and Nagios: System and Network Monitoring, 2nd Edition, updated to address Nagios 3.0, will help you take full advantage of this program.

Nagios, which runs on Linux and most *nix variants, can be configured to continuously monitor network services such as SMTP, POP3, HTTP, NNTP, SSH, and FTP. It can also supervise host resources (processor load, disk and memory usage, running processes, log files, and so on) and environmental factors, such as temperature and humidity. This book is your guide to getting the most out of this versatile and powerful monitoring tool.

Inside Nagios, you'll learn how to:
Install and configure the Nagios core, all standard plugins, and selected third-party plugins
Configure the notification system to alert you of ongoing problems-and to alarm others in case of a serious crisis
Program event handlers to take automatic action when trouble occurs
Write Perl plugins to customize Nagios for your unique needs
Quickly understand your Nagios data using graphing and visualization tools
Monitor Windows servers, SAP systems, and Oracle databases

The book also includes a chapter that highlights the differences between Nagios versions 2 and 3 and gives practical migration and compatibility tips. Nagios: System and Network Monitoring, 2nd Edition is a great starting point for configuring and using Nagios in your own environment.
About the AuthorWolfgang Barth has written several books for professional network administrators, including Firewall (Suse Press), Network Analysis (Suse Press), and Backup Solutions with Linux (Open Source Press). He is a professional system administrator with considerable experience using Nagios.

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Pro Puppet Review

Pro Puppet
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Pro Puppet Review
Just finished reading Pro Puppet and I'm pretty impressed. If I were to summarize in a few short words I'd say this book could have easily been titled "Pro Deployments" as it really covers a whole host of tools that support Puppet and configuration management in general.
I am fairly new to puppet though I have a strong conceptual understanding of configuration management in general. Although puppet may be thought of as a tool to be used for very large environments, it can also be used to good advantage at smaller sites just for the versioning of your configs, and better testing.
For a quick summary of topics I found well covered here's a bullet point list:
o installing puppet, master & agent
o configuring your firewall appropriately
o managing your certificates for puppet
o applying a basic config as proof of concept
o digging in deeper with Puppet's declarative DSL
o using version control (git) with puppet - a big win for any environment
o brief mention of bootstrapping and provisioning - kickstart & preseed
o modules, classes, functions and templates
o building and managing your basic dev, test and production environments
o using a pre-commit hook with your version control system
o scaling puppet with apache & passenger
o adding a load balancer and clustering
o horizontal scaling puppet ca & masters
o external node classifications - allowing a more scalable solution for manifests & configs
o using LDAP for node information
Hitting chapter six really starts digging into some meaty topics including:
o virtualizing your configurations - applying conditionally or "realizing" to certain nodes
o enable queueing for more scalable puppet requests
o in-depth examples to manage ssh keys, nagios configs & load balancers with dynamic node configuration - awesome!
o using sqlite or mysql to store your puppet configs
o using web consoles such as dashboard and foreman
o creating puppet modules (like RPM packages)
o installing existing puppet modules (packages) from the puppet forge
o alternate DSL for puppet with Ruby DSL
o testing your configs without alternate test network - cucumber
o command line & dashboard reporting
o extending the facter database with custom environment variables
After all this material you might be stuck on the idea that Puppet does not operate in real-time. By default it is configured to refresh configs and services on your servers every thirty minutes. Of course you can do so manually, or adjust this parameter, but you may require real-time usage.
Enter Marionette Collective, an imaginative name for an add-on which extends Puppet to provide this more robust functionality.
Pro Puppet certainly introduces a wide range of real-world use-cases to the reader, which make the book very valuable. Using with version control, to manage dev, test and production, and scaling to handle large number of hosts are all key topics. What's more the method of automatically configuring nodes in your load balancer, nagios, or cacti reporting, is just a really great use of this technology.
What I found surprisingly missing though was any mention of using Puppet for provisioning or more specifically cloud deployments. This is I think a topic that everyone is talking about and one that few books are covering. An opportunity perhaps! Along with that, I would have liked to see a comprehensive discussion of different configuration management systems, such as cfengine, and chef, and why Puppet is the best and/or what the pros and cons of each are.
Despite those reservations, the book was excellent. If you've already decided to use puppet in your environment this is a very good volume to get you up to speed!
Pro Puppet Overview
Pro Puppet is an in-depth guide to installing, using, and developing the popular configuration management tool Puppet. The book is a comprehensive follow-up to the previous title Pulling Strings with Puppet. Puppet provides a way to automate everything from user management to server configuration. You'll learn how to create Puppet recipes, extend Puppet, and use Facter to gather configuration data from your servers. Puppet is a must-have tool for system administrators, and Pro Puppet will teach you how to maximize its capabilities and customize it for your environment.
Install and configure Puppet to immediately start automating tasks and create reporting solutions
Learn insider tricks and techniques to better manage your infrastructure
Become a Puppet expert!


What you'll learn
See how to install Puppet on a variety of platforms
Learn how to manage infrastructure with Puppet
Discover how to scale Puppet to suit small, medium, and large organizations
Learn how to integrate Puppet with other tools such as Cucumber and Nagios
Discover advanced Puppet techniques to make managing your environment easier
Learn how to develop and extend Puppet to suit your environment

Who this book is for
Systems administrators, implementers and systems integrators.

Table of Contents
Getting Started with Puppet
Building Hosts with Puppet
Working with Environments
Puppet Scalability
Externalizing Puppet Configuration
Exporting and Storing Configuration
Puppet Consoles: Dashboard and The Foreman
Tools and Integration
Reporting with Puppet
Extending Facter and Puppet
Marionette Collective
Working with Puppet


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