Also called 'cpan' :)

pc03:/W 503 $ cpan
Terminal does not support AddHistory.

cpan shell -- CPAN exploration and modules installation (v1.7601)
ReadLine support available (try 'install Bundle::CPAN')

cpan> help

Display Information
 command  argument          description
 a,b,d,m  WORD or /REGEXP/  about authors, bundles, distributions, mod
+ules
 i        WORD or /REGEXP/  about anything of above
 r        NONE              reinstall recommendations
 ls       AUTHOR            about files in the author's directory

Download, Test, Make, Install...
 get                        download
 make                       make (implies get)
 test      MODULES,         make test (implies make)
 install   DISTS, BUNDLES   make install (implies test)
 clean                      make clean
 look                       open subshell in these dists' directories
 readme                     display these dists' README files

Other
 h,?           display this menu       ! perl-code   eval a perl comma
+nd
 o conf [opt]  set and query options   q             quit the cpan she
+ll
 reload cpan   load CPAN.pm again      reload index  load newer indice
+s
 autobundle    Snapshot                force cmd     unconditionally d
+o cmd
cpan>
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