# perl -MCPAN -e 'install Image::Size'
Going to read /home/tos/.cpan/sources/authors/01mailrc.txt.gz
CPAN: Compress::Zlib loaded ok
... (and so on) ...
  /usr/bin/make install  -- OK

##</code><code>##

# perl -MCPAN -e 'install URI'
Can't locate object method "install" via package "URI" (perhaps you forgot to load "URI"?) at -e line 1.