how to know if a perl module is allready installed

we can use command like this:

perl -MModule::Name -e “print \”Module installed.\\n\”;”

example if I want to check if the Module Net::LDAP::Control::Persistent is installed I have to run this command

perl -MNet::LDAP::Control::PersistentSearch -e “print \”Module installed.\\n\”;”
In case that this module is Installed the console will print

Module installed
In case that this module is not installed the console will print something like this:

Can’t locate Net/LDAP/Control/PersistentSearch.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .).
BEGIN failed–compilation aborted.