Just for your reference, if you log into your server via SSH (see wiki for more info) you can use the command "whereis" to find the paths to programs installed on your server.
Image Magick is a little harder to find because image magick isn't a progam in it self, but refers to a group of programs. Convert is probably the most commonly used. So if you typed "whereis convert" at the SSH prompt it would return /usr/bin/convert.
just an "FYI" - hope it's useful.
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