This is from the El Capitan PB1 bootable USB thread. I posted a reply in that thread here. Would be really thankful if some security savy person could have a look if this script does anything else than making a bootable usb-install. It may be all innocent but I got suspicious when a) it seemed to trigger postfix/master for me and b) the script is not viewable and c) the activity here on the forum of the person posting it has only been to promote his scripts for installers. Hopefully I'm just paranoid, anyway I advise to not run unverified scripts although I stupidly did it myself. Cost me a couple of hours of restoring from backup since I don't trust it to be an ok script. Thanks guys/gals, be safe.