UNIX in a Nutshell: System V Edition

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unset

unset [options] names

Erase definitions of functions or variables listed in names. The Korn shell version supports options.

Options

-f

Unset functions in names.

-n

Unset indirect variable (nameref) name, not the variable the nameref refers to. ksh93 only.

-v

Unset variables names (default). ksh93 only.

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