Unable to download or extract Nginx source tarball Possible reasons: * You are not connected to the Internet. If this is the case, then please connect to the Internet and try again. * The URL that this installer tried to download from no longer exists. If this is the case, then please download and extract the Nginx source manually. Then restart this installer, and choose option 2 ("No: I want to customize my Nginx installation"). * The download was corrupted. Please re-run this installer; it will re-download Nginx. If this still fails, then please download and extract the Nginx source manually. Then restart this installer, and choose option 2 ("No: I want to customize my Nginx installation"). * This installer is not able to write to /tmp. Please fix the permissions for this directory, or run this installer as root.