The explicit question is :

Question

9

No manual entry for unset

rated 0 times [ 9] [ 0] / answers: 1 / hits: 2855 / 3 Years ago, sun, july 18, 2021, 6:39:10

I try to display the help pages of unset command line , i get as a result the following output:

No manual entry for unset

I see this issue since they are similar , however , it cannot be solution for this issue .
Indeed , that issue has been resolved by installing some packages using this cmd :

sudo apt-get install manpages-posix manpages-posix-dev

So , i try to do the same thing ;except modifying posix by unset , so i do this :

sudo apt-get install manpages-unset

The result was :

Unable to locate package manpages-unset

The explicit question is :

How to display manual of unset

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answered 3 Years ago diket · Accepted Answer

As set and unset are shell builtins you need to use the help command to get their detailed help:

$ help unset

unset: unset [-f] [-v] [-n] [name ...]

Unset values and attributes of shell variables and functions.



For each NAME, remove the corresponding variable or function.



Options:

  -f    treat each NAME as a shell function

  -v    treat each NAME as a shell variable

  -n    treat each NAME as a name reference and unset the variable itself

    rather than the variable it references



Without options, unset first tries to unset a variable, and if that fails,

tries to unset a function.



Some variables cannot be unset; also see `readonly'.



Exit Status:

Returns success unless an invalid option is given or a NAME is read-only.