Chapter 3. Command Line Utilities

When Linus Torvalds introduced Linux and for a long time thereafter, Linux did not have a graphical user interface: It ran on character-based terminals only. All the tools ran from a command line. Today the Linux GUI is important, but many people—especially system administrators—run many command line programs. Command line utilities are often faster, more powerful, or more complete than their GUI counterparts. Sometimes there is no GUI counterpart ...

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