ImageMagick option commands not found
<p>I'm using ImageMagick to turn my pdf pages into images. It works just fine with default settings but if I try some options, it keeps telling me <code>command not found</code></p>

<p>For now, I'm doing all this from a SSH client.</p>

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<p><strong>The command I'm attempting is:</strong></p>

<pre><code>-quality 90 /usr/bin/convert public_html/so/November-2015.pdf[0] output.jpg
</code></pre>

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<p>It works just fine without the quality part. I also tried density with no success.</p>