The - -help option is available for most commands. In fact, even if your command doesn't recognize the option, it will give you a short summary on how to use the command anyway because it doesn't understand what you want it to do. You should be aware that although the purpose of the command is to give a short overview of the way it should be used, the information is often still too long to fit on one screen. If this is the case, pipe it through less to view the information page by page. In Figure 4-4 you can see an example of the output provided by using the - -help option.
slipG (6-bit Serial Line IP) cslipö [VJ 6-bit Serial Line IP) adaptive (Adaptive Serial Line IF)
Figure 4-4. The--help option provides a short summary on how to use a command.
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