9.4. Purpose of Linux images
You may not want to have all identical Linux servers. A typical server farm needs several kinds of servers. Each instance of the Linux operating system we call an image. As you customize a Linux image for its particular function, it becomes a specific server. For example, you can have an image that is configured to be a domain name server (DNS) serving the internal local area network, or an Apache HTTP or https server, or a firewall. Before implementing a server farm on Linux, it is advantageous to think about what kinds of servers are needed. Code sharing across servers might be possible, thus making software management easier.
Let us look at ISPCompany for an example of code sharing and easier software management. ...
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