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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
Lock Free Chapter
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
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Index
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Index

Chapter 5. Monitoring System Resources

As the needs of your organization expand, your network will grow and change in order to match the growth. Keeping track of the resources on each node is extremely important for stability. While Linux handles resources exceptionally well, it can only do so much. CPUs can be overutilized, disks become full, and excessive input/output can halt even the strongest of servers. Keeping an eye on these things is very important, especially when systems are used in production and depended upon by others.

In this chapter, we'll look at ways to inspect what's running on your Linux systems and manage their resources to help ensure your nodes are good citizens on your network.

In this chapter, we will cover:

  • Inspecting and managing processes
  • Understanding load average
  • Checking available memory
  • Using shell-based resource monitors
  • Checking disk space
  • Scanning used storage
  • Introduction to logging
  • Maintaining log size with logrotate
  • Understanding the systemd...
CONTINUE READING
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Tech Concepts
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Programming languages
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Mastering Linux Network Administration
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