]] SORRY FOR NANO-)CODE( SIZE  [[
brianp@raptor:~$ eng path  [[ env | grep -i  => check PATH]]
PATH=/home/brianp/bin/psh:/home/brianp/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games

brianp@raptor:~$ fcmd.pl psr  [[ Search $ENV{PATH} for target ]]
/home/brianp/bin/psh/psr.sh
/home/brianp/bin/psr.pl

brianp@raptor:~$ ll `fcmd.pl psr`  [[ Check paths and exec perms  ]]
-rwxr--r-- 1 brianp brianp  62 Jan 30 11:30 /home/brianp/bin/psh/psr.sh*
-rwxr--r-- 1 brianp brianp 217 Sep  5  2001 /home/brianp/bin/psr.pl*

brianp@raptor:~$ cat  `fcmd.pl psr`  [[ check for [more] buggy code  ]]
#!/bin/sh
/usr/local/bin/perl -w /home/brianp/bin/psr.pl "$@"
...
#!/usr/local/bin/perl -w
# PSR - Perl Search & Replace. Replacement for the #%%&^*# braindead sed.
$target = $ARGV[0];  # Target to search for is the first argument.
for(<STDIN>)  {
        eval $target;
        print $_;
}

[[ Check for actual functionality... Filter BLANK lines  ]]
brianp@raptor:~$ /usr/local/bin/perl -v | psr.sh "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  [[ psr.sh does filter top blank line! ]]

brianp@raptor:~$ /usr/local/bin/perl -v |  head -n 2
[[ blank line starts spew ]]
This is perl 5, version 22, subversion 1 (v5.22.1) built for x86_64-linux

brianp@raptor:~$ /usr/local/bin/perl -v | psr.pl "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  [[ blank line gone, Larry's Baaaaaaaak  ]]

brianp@raptor:~$ psr 2>&1 | head -n1
No command 'psr' found, did you mean:

brianp@raptor:~$ whoami
brianp

brianp@raptor:~$ eng shell
SHELL=/bin/bash

brianp@raptor:~$ cat /etc/debian_version
jessie/sid  [[ Ubuntu 15.10 -> Wily Werewolf ??] 

brianp@raptor:~$ uname -a
Linux raptor 4.2.0-25-generic #30-Ubuntu SMP Mon Jan 18 12:31:50 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

brianp@raptor:~$ ll /bin/sh  [[ Not regular sh/bash]]
lrwxrwxrwx 1 root root 4 Jan 22 23:48 /bin/sh -> dash*

[[ shell made by iceholes to confound infidles? ]]
brianp@raptor:~$ ll `which dash`  
-rwxr-xr-x 1 root root 125400 Jun  4  2015 /bin/dash*

##</code><code>##


brianp@raptor:~$ file `fcmd.pl psr`
/home/brianp/bin/psh/psr.sh: POSIX shell script, ASCII text executable
/home/brianp/bin/psr.pl:     a /usr/local/bin/perl -w script, ASCII text executable, with CRLF line terminators