Which files did you download - the first 2 or the 3rd? I had checksum mismatches on all 3 with MD5 and SHA1. Is there an alternate / mirror site to download from? SL-60-x86_64-2011-03-03-Everything-DVD1.iso 02-Mar-2011 17:21 4.1G SL-60-x86_64-2011-03-03-Everything-DVD2.iso 02-Mar-2011 17:22 1.0G SL-60-x86_64-2011-03-03-Install-DVD.iso 02-Mar-2011 16:36 3.9G Thanks, Braja --- On Sat, 5/21/11, Denis Fateyev <[log in to unmask]> wrote: From: Denis Fateyev <[log in to unmask]> Subject: Re: SL x86_64 checksums not matching To: "Braja Kishore Chattaraj" <[log in to unmask]> Cc: "Scientific Linux" <[log in to unmask]> Date: Saturday, May 21, 2011, 10:37 AM Hello, I just have installed SL-6.0 from DVD images taken from there: http://ftp.scientificlinux.org/linux/scientific/6.0/x86_64/iso/ http://ftp.scientificlinux.org/linux/scientific/6.0/i386/iso/ SHA1/SHA256 checksums match, and installation process doesn't bring any issues. --- wbr, Denis.