This is Perl module App::CLI::Plugin::InstallCallback. INSTALLATION App::CLI::Plugin::InstallCallback installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan App::CLI::Plugin::InstallCallback Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install DOCUMENTATION App::CLI::Plugin::InstallCallback documentation is available as in POD. So you can do: % perldoc App::CLI::Plugin::InstallCallback to read the documentation online with your favorite pager. Akira Horimoto