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A Practical Guide to Ubuntu Linux (Versions 8.10 and 8.04), Second Edition by Mark G. Sobell

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5 The Linux Utilities

When Linus Torvalds introduced Linux and for a long time thereafter, Linux did not have a graphical user interface (GUI): It ran on character-based terminals only, using a command-line interface (CLI), also referred to as a textual interface. All the tools ran from a command line. Today the Linux GUI is important but many people—especially system administrators—run many command-line utilities. Command-line ...

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