3. The Utilities

When Linus Torvalds introduced Linux and for a long time thereafter, Linux did not have a graphical user interface (GUI): It ran using a textual interface, also referred to as a command-line interface (CLI). 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 utilities are often faster, more powerful, or more complete than their GUI counterparts. Sometimes there ...

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