This book introduces readers to the fundamentals of Unix: what it is, why it is important and how to use it. The opening chapters show how to get started in Unix and how to use the programs available. Subsequent chapters describe the online Unix manual, command syntax, the Shell and the C-Shell. The following material covers communications on Unix, including networks and addresses, plus mail. The author then describes filters, files, the vi Editor and the Unix file system. The last chapters cover directories, Usenet and Internet services.