Apache Downloading a lot data, how to find out which script?

I host a few sites, i noticed a ton of bandwidth being Downloading (not so much when uploading) when the httpd service is running, when I stop it, so does the heavy download use.

and I tried the netstat 80 grep command only to get a endless list of connections.

How could I find out what script (lets say a php) is downloading all this data?

Running Centos httpd

closed as unclear what you're asking by Jeff Schaller, Stephen Kitt, MelBurslan, Anthon, garethTheRed May 12 '16 at 20:22

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You can check file opened by apache with lsof command. i.e. sudo lsof -c apache2 -nP -i :80 will do this and also prints out processes using port number 80(http).

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