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5 – Working With Commands‌

Up to this point, we have seen a series of mysterious commands, each with its own mys- terious options and arguments. In this chapter, we will attempt to remove some of that mystery and even create some of our own commands. The commands introduced in this chapter are:

type – Indicate how a command name is interpreted

which – Display which executable program will be executed

help – Get help for shell builtins

man – Display a command's manual page

apropos – Display a list of appropriate commands

info – Display a command's info entry

whatis – Display a very brief description of a command

alias – Create an alias for a command


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