Malformed header from script cgi

If you want to run a bash script as a CGI and get this message:

[Sun Feb 07 19:51:59.424071 2016] [cgi:error] [pid 4265] [client x.x.x.x:50952] malformed header from script 'weather.sh': Bad header: Searching via name..

Make sure to put an additional echo in your script after the content type

#!/bin/bash
echo "Content-type: text/html"
echo
your-command