ln -s /home/brianp/bin/psr.pl /home/brianp/bin/psh/psr

brianp@raptor:~$ perl -v | psr "s/^\s*$//" | head -n 2
This is perl 5, version 22, subversion 1 (v5.22.1) built for x86_64-linux
Copyright 1987-2015, Larry Wall

PATHEXT=.BAT;.pl;.EXE;.COM;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW