yum -y install perl-libwww-perl.noarch   or

 For example:

On rpm based systems:

yum install perl-libwww-perl.noarch perl-LWP-Protocol-https.noarch

On APT based systems:

apt-get install libwww-perl liblwp-protocol-https-perl

Via cpan:

perl -MCPAN -eshell
cpan> install LWP LWP::Protocol::https

We recommend setting this set to "2" as upgrades to csf will be performed
over SSL to https://download.configserver.com