WordPress MU

While apache configuration, I cam e across this
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2. In the directive of your virtual host, look for this
line
"AllowOverride None"
and change it to
"AllowOverride FileInfo Options"
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I wanna know where I can find this Virtual Host. I am using reseller hosting

these configs are inside your httpd.conf file... and is accessed via your CPanel if you have your feature enabled - most of resellers are not...