Hi all, what is the official OS supported by gLite? Cause, after reading : https://twiki.cern.ch/twiki/bin/view/LCG/GenericInstallGuide310 : Installing the Operating System Scientific Linux 4 (CERN) The OS version of gLite Middleware version 3.1 is Scientific Linux 4 (SL4). For more information in SLC4, please check: http://www.scientificlinux.org The sources and the images (iso) to create CDs for SLC4 can be found in this site: ftp://ftp.scientificlinux.org/linux/scientific/4x Middleware testing has been mostly carried out on CERN Scientific Linux: http://linuxsoft.cern.ch/ but it should be able to run on any binary compatible distribution. It's not clear for me. Two different repos are shown and you talk about two differnt OS: SL and SLC4, and next issue is: * Using SL4 compatible distributions other than CERN Scientific Linux .... Cheers, Aranu