How to get a list of "standard" perl modules available on the system?

Question

In perlmodlib(1) there is a phrase:

Perhaps not all of the modules listed below are installed on your system. For example, the GDBM_File module will not be installed if you do not have the gdbm library.

How to get the actual list of standard modules installed in the system?

Answer 1

The cpan command can do this:

 % cpan -a 

I wrote App :: Module :: Lister to do the job. Although this is a module, it is also a program that does what you want when you run it as a program:

 % perl `perldoc -l App::Module::Lister` 

Several other Stackoverflow questions answer this for specific modules, including:

• How to check if Perl module is installed?
• How to check if I have a Perl module before using it?
• How to check the availability of Perl, its version and the presence of the necessary module?

Due to your specific question, do you really care what implements your DBM functions? Do you have a question about this?