$ su root
Password:
# perl -MCPAN -e shell
Terminal does not support AddHistory.
cpan shell -- CPAN exploration and modules installation (v1.7602)
ReadLine support available (try 'install Bundle::CPAN')
cpan> install Bundle::CPAN
CPAN: Storable loaded ok
Going to read /root/.cpan/Metadata
Warning: Cannot install Bundle::CPAN, don't know what it is.
Try the command
    i /Bundle::CPAN/

to find objects with matching identifiers.
cpan> i /Bundle::CPAN/
No objects found of any type for argument /Bundle::CPAN/

cpan>