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10
Connecting to Networks
Linux networks are taking the IT industry by storm. Many organizations use 
Linux in their data centers, on both physical servers and in the cloud. Ubuntu 
Server is among the most popular choices for running mission-critical applications, 
but without a stable network to connect the individual components of your 
infrastructure together, even the most powerful server hardware will be ineffective.
So far in this book, we've worked with a single Ubuntu Server instance. Here, we 
begin a two-part look at networking in Linux. In this chapter, we'll discuss topics 
related to initial network connectivity and remote management. We'll continue 
learning additional networking topics in 
Chapter 11
, 
Setting Up Network Services
, 
where we'll work on building and configuring additional components that will 
enable your servers to communicate more effectively, which will result in a strong 
foundational network that will serve your needs for years to come.
In this episode of our Ubuntu adventure, we will cover:
•  Setting the hostname
•  Managing network interfaces
•  Assigning static IP addresses
•  Understanding Linux name resolution
•  Getting started with OpenSSH
•  Getting started with SSH key management
• 
Simplifying SSH connections with a config file
To get started in our exploration of networking, we should first give each of our 
Ubuntu servers their own identity; basically we should give them a name to help 
distinguish each from the others.

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Connecting to Networks