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Chris Fidao - Servers for Hackers: Server Administration for Programmers

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Dont catch Accidental Sysadmin SyndromeApplication development is getting more complex, and we developers need to know how to setup and maintain the servers that run our applications. Dont get stuck at 3am with a broken server, or in the middle of your workday fighting configuration. Learn how to administer your servers!Run & Manage Web ServersLearn how to install and configure Nginx, Apache so you can serve your web applications.Multi-Server SetupLearn how to connect multiple servers so they can work together for load balancing, caching, redundancy and more.Latest TechnologiesLearn how to install and manage the latest technologies, including setting up queues/workers, monitoring processes so they dont fail, handling server and applications logging and more!Setup and SecurityLearn how to setup each server with needed software and security configuration to keep your applications and their data safe.This includes preventing unauthorized access, managing permissions and users, learning how to use the iptables firewall, configuring SSH, enabling SSL certificates and more!

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Servers for Hackers Server Administration for Programmers Chris Fidao This book - photo 1
Servers for Hackers
Server Administration for Programmers
Chris Fidao

This book is for sale at http://leanpub.com/serversforhackers

This version was published on 2018-06-19

This is a Leanpub book Leanpub empowers authors and publishers with - photo 2

* * * * *

This is a Leanpub book. Leanpub empowers authors and publishers with the Lean Publishing process. Lean Publishing is the act of publishing an in-progress ebook using lightweight tools and many iterations to get reader feedback, pivot until you have the right book and build traction once you do.

* * * * *

2014 - 2018 Chris Fidao
Servers

Servers can be fun!

Knowing how to setup, run and administer a server can be as empowering as coding itself.

Some applications have needs stretching beyond what managed hosting providers are willing to support. This shouldnt stop us from building our applications.

Servers can be hard!

Consumers expect and demand services to be functioning. Downtime can cost real money, and is often met with frustration and anger.

At the same time, servers are increasingly commodified. Hosting once involved a few, powerful servers. Now, the modern Cloud consists of many small, cheap virtual machines. The more servers we have, the more likely we are to run into issues.

The end result is that we need to build for failure. This is a Hard Problem, and requires us to know a lot about the servers running our applications.

This book exists because we developers are now faced with System Administration issues. We need to at least know the basics of what goes into hosting and serving our applications.

So, lets not get stuck with limiting hosting or broken servers!

Video Site

Since publishing this book, Ive also collected my newsletter editions, articles and videos to https://serversforhackers.com.

Ill be continuously adding new videos! These continue to concentrate on topics important to web servers and web development, from the basic to the complex.

The videos all come with a write-up of the commands and information presented in the video, usually along with some extra resources. This makes the videos easy to come back to for quick reference later.

Servers for Hackers Video SiteBook Issues All feedback is hugely appreciated - photo 3Servers for Hackers Video Site
Book Issues

All feedback is hugely appreciated! Any questions, comments, issues, stories of glory/valor and praise can be directed to the Github repository created for feedback!

https://github.com/Servers-for-Hackers/the-book

Introduction
Accidental Sysadmin Syndrome

Youre a developer.

A server broke, and youre the only one around to fix it.

You have a special-needs application that requires specific software.

You need to setup a development server, and will spend half of your day trying to get some simple configuration to work.

These are symptoms of Accidental Sysadmin Syndrome.

This book is for developers who find themselves needing or wanting to be a SysAdmin.

Assumptions

This book assumes at least a passing familiarity with the command line. Those who have logged into the shell and poked around a server before will benefit the most.

If you are new to the command line, concentrate on getting comfortable with Vagrant. This will help familiarize you with using the command line and servers.

Linux Distributions

There are many distributions of Linux. Some popular ones are Arch, Debian, Ubuntu, Redhat, CentOS, Fedora and CoreOS.

Many of these distributions are related to each other in some way. For example, some of these distributions are downstream from others.

A downstream Linux distribution includes the upstreams distributions changes, and may add their own.

For example, Ubuntu is based on Debian and is considered downstream of Debian. CentOS is based on RedHat and is therefore downstream from RedHat. RedHat sponsors Fedora and so Fedora is very similar to RedHat and CentOS (although it has a much more rapid release cycle).

Each distribution has opinions about Linux and its use. It would be too cumbersome to cover all topics for each distribution and so Ive chosen to concentrate on Ubuntu.

This book concentrates on Debian/Ubuntu, however, the serversforhackers.com video site covers multiple distributions!

Ubuntu is one of the most popular server and desktop distributions. It has a great set of configurations that come out of the box, allowing us to worry less about configuration until we need to. This makes it easy to use.

Ubuntu updates software packages quickly relative to some other distributions. However, updating to the latest software makes it easier to introduce new bugs and version conflicts.

Luckily, Ubuntus LTS releases are a good solution to this potential issue.

LTS stands for Long Term Support

LTS versions are released every 2 years but support for them last 5 years. This makes them ideal for longer-term use.

As major versions are released yearly, only every other major release of Ubuntu is an LTS. The current LTS is 18.04 - the following LTS release will be 20.04.

Xenial, the codename for Ubuntu 16.04, was released in April of 2016. Support officially ends 5 years later (April of 2021).

Bionic, the codename for Ubuntu 18.04, was released in April of 2018. This will be a relevant server for at least 2 years, but likely beyond that with support officially ending 5 years later (April of 2023).

Ubuntu LTS releases offer more stability and security, but generally do not prevent us from installing the latest software when we need to. This makes them ideal candidates for every-day server usage.

Popularity is Relative

RedHat Enterprise (RHEL) is a popular distribution in the enterprise world. Many hosting companies use CentOS along with cPanel/WHM or Plesk control panels. In the open source/startup worlds, Ubuntu is one of the most popular distributions of Linux.

Because Ubuntu is closely tied to Debian, most, but certainly not all, topics included here will be exactly the same for Debian.

For RedHat/CentOS distributions, most topics will have small-to-large differences from what you read here.

In any case, much of what you learn here will be applicable to all distributions.

I recommend this Rackspace knowledge-base article for more information on the various Linux distributions: https://community.rackspace.com/products/f/25/t/6677.

The Sandbox

If you want a sandbox - a place to safely play with a server - this chapter is for you.

The topics of the Sandbox section is not necessary to follow along in this book, but it will be helpful.

Youll learn how to setup a local server on which you can develop an application or experiment with new technology. As a bonus, youll avoid mucking up your computer with development software!

Well briefly cover using Vagrant to setup a local server.

The benefit of Vagrant is that it will let us use a real server to test on. You can create a server also used in production. Virtual servers are also safe - we can thoroughly mess them up, throw them away and recreate them as much as we need.

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