Apache errors and the approach to solve it
Premature end of script headers
500 Internal Server Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers.
Some troubleshooting tips:
i) Check /var/log/apache2/error.log (in ubuntu, check the respective apache error log location for the messages)
ii) Check if the content type of the page is correctly set for the html content output.
print “Content-type: text/html\n\n”;
iii) Check if a valid permission has been given for the file to get executed. The file need permission 755 for it to be executed on the server.
iv) Check if the configuration path, inclusion path are set correctly in the referenced programs