See the current Perl documentation for ExtUtils::Command.
Here is our local, out-dated (pre-5.6) version:

ExtUtils::Command - utilities to replace common UNIX commands in Makefiles etc.

perl -MExtUtils::Command -e cat files... > destination
perl -MExtUtils::Command -e mv source... destination
perl -MExtUtils::Command -e cp source... destination
perl -MExtUtils::Command -e touch files...
perl -MExtUtils::Command -e

The module is used in Win32 port to replace common
UNIX commands. Most commands are wrapers on generic
modules File::Path and File::Basename.
Should probably be Auto/Self loaded.
ExtUtils::MakeMaker, ExtUtils::MM_Unix, ExtUtils::MM_Win32
Nick Ing-Simmons <nick@ni-s.u-net.com>.