5.3. UNIX/Linux
Of the other network operating systems available, the various forms of UNIX are probably the most popular. It is definitely the oldest of the network operating systems. Bell Labs developed UNIX, in part, in 1969. We say "in part" because there are now so many iterations, commonly called flavors, of UNIX that it is almost a completely different operating system.
Although the basic architecture of all flavors is the same (32-bit kernel, command-line based, capable of having a graphical interface, as in X Window System), the subtle details of each make one flavor better in a particular situation than another.
In the following sections, you will learn about these UNIX/Linux topics:
Features
Client support and interoperability
Authentication ...
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