install cli on ubuntu 12.04

Hi,

I am new in this forum.

Running an ESXi 5.x with 3 VMs with Ubuntu.

I am trying to install the cli on my Ubuntu 12.04 Desktop System but fail.

Message:

Please wait while configuring CPAN ...

CPAN config Command failed .

Install not able to configure CPAN. Please configure CPAN manually and re-run
the Installer.

Can anyone give me a hint what to do!?

Thanks in advance.

Regards

Karl-Heinz