cpan Net::SSLeay
Running install for module \'Net::SSLeay\' Running make for M/MI/MIKEM/Net-SSLeay-1.55.tar.gz Has already been unwrapped into directory /r
Some CPAN modules require the C-header files to compile successfully. They end with -dev. These are not normally package with the OS. For Net::SSLeay you'll need to install libssl-dev.
-dev
Net::SSLeay
libssl-dev
For Debian distros: sudo apt-get install libssl-dev
sudo apt-get install libssl-dev