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  • Book Overview & Buying Mastering Linux Network Administration
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Mastering Linux Network Administration

Mastering Linux Network Administration

By : Jay LaCroix
4.6 (7)
Buy this Book
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Mastering Linux Network Administration

Mastering Linux Network Administration

4.6 (7)
By: Jay LaCroix
Buy this Book

Overview of this book

Linux is everywhere. Whether you run a home office, a small business, or manage enterprise systems, Linux can empower your network to perform at its very best. Armed with the advanced tools and best practice guidance of this practical guide, you'll be able to mold Linux networks to your will, empowering your systems and their users to take advantage of all that Linux-based networks have to offer. Understand how Linux networks function and get to grips with essential tips and tricks to manage them - whether you're already managing a networks, or even just starting out. With Debian and CentOS as its source, this book will divulge all the details you need to manage a real Linux-based network. With detailed activities and instructions based on real-world scenarios, this book will be your guide to the exciting world of Linux networking.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Setting up Your Environment
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1. Setting up Your Environment
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Getting started
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Distributions to consider
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Physical machines versus virtual machines
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Setting up and configuring VirtualBox
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Acquiring and installing Debian 8
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Acquiring and installing CentOS 7
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Summary
2
2. Revisiting Linux Network Basics
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2. Revisiting Linux Network Basics
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Understanding the TCP/IP protocol suite
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Naming the network device
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Understanding Linux hostname resolution
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Understanding the net-tools and iproute2 suites
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Manually managing network interfaces
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Managing connections with Network Manager
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Summary
3
3. Communicating Between Nodes via SSH
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3. Communicating Between Nodes via SSH
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Using OpenSSH
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Installing and configuring OpenSSH
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The OpenSSH config file
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Understanding and utilizing scp
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Generating public keys
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Keeping SSH connections alive
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Exploring an alternative to SSH – utilizing Mosh (mobile shell)
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Summary
4
4. Setting up a File Server
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4. Setting up a File Server
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File server considerations
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NFS v3 versus NFS v4
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Learning the basics of Samba
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Mounting network shares
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Automatically mounting network shares via fstab and systemd
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Creating networked filesystems with SSHFS
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Summary
5
5. Monitoring System Resources
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5. Monitoring System Resources
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Inspecting and managing processes
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Understanding load average
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Checking available memory
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Using shell-based resource monitors
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Scanning used storage
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Introduction to logging
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Maintaining log size with logrotate
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Understanding the systemd init system
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Understanding the systemd journal
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Summary
6
6. Configuring Network Services
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6. Configuring Network Services
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Planning your IP address layout
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Installing and configuring a DHCP server
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Installing and configuring a DNS server
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Setting up an internal NTP server
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Summary
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7. Hosting HTTP Content via Apache
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7. Hosting HTTP Content via Apache
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Installing Apache
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Configuring Apache
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Adding modules
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Setting up virtual hosts
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Summary
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8. Understanding Advanced Networking Concepts
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8. Understanding Advanced Networking Concepts
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Dividing your network into subnets
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Understanding the CIDR notation
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Implementing Quality of Service
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Routing TCP/IP traffic
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Creating redundant DHCP and DNS servers
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Summary
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9. Securing Your Network
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9. Securing Your Network
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Limiting the attack surface
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Securing OpenSSH
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Configuring the iptables firewall
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Protecting system services with fail2ban
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Understanding SELinux
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Configuring Apache to utilize SSL
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Deploying security updates
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Summary
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10. Troubleshooting Network Issues
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10. Troubleshooting Network Issues
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Tracing routing issues
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Troubleshooting DHCP issues
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Troubleshooting DNS issues
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Displaying connection statistics with netstat
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Scanning your network with Nmap and Zenmap
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Installing missing firmware on Debian systems
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Troubleshooting issues with Network Manager
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Summary
11
Index
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Index

Understanding the TCP/IP protocol suite

TCP/IP is the most popular networking protocol in existence. Not only is it the primary protocol suite of the Internet, it's something that you can find on just about any device that supports network connectivity in one form or another. Your computer understands this suite very well, but nowadays your phone, TV, and perhaps even a kitchen appliance or two supports this technology. It really is everywhere. Although TCP/IP is often referred to as a protocol, it's actually a protocol suite made up of several individual protocols. From the name, I'm sure you can gather that two of them are the TCP and IP protocols. In addition, there is also a third, UDP, which is part of this protocol suite as well.

TCP is an acronym for Transmission Control Protocol. It's responsible for breaking down network transmissions into sequences (also known as packets or segments), which are then sent to the target node and reassembled back into the original...

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Mastering Linux Network Administration
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