or download this
# list all modules on my disk that have newer versions on C
+PAN
for $mod (CPAN::Shell->expand("Module","/./")){
...
next if $mod->uptodate;
printf "Module %s is installed as %s, could be updated to
+ %s from CPAN\n", $mod->id, $mod->inst_version, $mod->cpan_v
+ersion;
}