Not sure if I should update like this so apologies if its duff form:
Proper ticks, header line with \n\n - and a sensible path. It worked. Thanks very much for all the info folks. I have extra question:

My aim is to run a script from a link (turning the radio back to my favourite channel after colleagues put on handbag house channels and go home) These are the commands I thought would work - but they dont. 
system('bash /Library/WebServer/CGI-Executables/radio.sh ');
#system('osascript /Applications/radioscripts/Switch_iTunes_Subflow.ap
+p');
#system('osascript /Library/WebServer/CGI-Executables/Switch_iTunes_Su
+bflow.app');

[download]

The bash.sh works from a shell & I have given ownership to "www"
original Post::: Hello Monks - may I request some "local knowledge": This works on my ISP managed online server but how do I make it work on my local mac box (trying to setup some housekeeping scripts initiated by local browser link ) ?
Apache error log says : Premature end of script headers: /Library/WebServer/CGI-Executables/radio.pl 
#! /usr/bin/perl
use strict;
use CGI qw(:standard);
use Fcntl qw(:DEFAULT :flock);

system(`mkdir /cgi-bin/NEW`);

[download]

In reply to system commands in os x apache by blowupp

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