[myname@somehost ~]$ ls -ld /tmp
  [myname@somehost ~]$ ls -ld /tmp/.cpan
  [myname@somehost ~]$ ls -l  /tmp/.cpan/histfile

##</code><code>##

  [myname@somehost ~]$ chown -R /tmp/.cpan `whoami`
  [myname@somehost ~]$ chmod -R u+rwx /tmp/.cpan