[myname@somehost ~]$ cpan
CPAN: File::HomeDir loaded ok

cpan shell -- CPAN exploration and modules installation (v1.87)
ReadLine support enabled

cpan> install Some::Module

CPAN: Storable loaded ok
mkdir /tmp/.cpan/sources: Permission denied at /usr/lib/perl5/5.8.8/CPAN.pm line 2541
Couldn't open >/tmp/.cpan/histfile: Permission denied
Couldn't open >/tmp/.cpan/histfile: Permission deniedCouldn't open >/tmp/.cpan/histfile: Permission denied