At this part of our book, all software-listed on chapter 14 through chapter 32 are optional and depends on what you want to install or do on your server. e.g., What kind of tasks will your server do, and for
which part of your network Intranet/Internet? In other parts it may be important for you to replace the Telnet program with SSH for secure remote administration. Another interesting program is Tripwire that
aids system administrators and users in monitoring a designated set of files for any changes.