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Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

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Name

help

Synopsis

help [--all] [patterns]

Provide help for built-in commands. With no options, show the command and any options or parameters for the most common commands. With --all, show the same information for all possible commands. If you specify a pattern (i.e., a partial command name) or a full command name, a more complete description of the command or commands matching the pattern is displayed.

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