John Haggerty wrote: > I'm pretty new to yum, so can anyone say whether there are any > subtleties to upgrading SL 4.0 or 4.1 to SL 4.2 using yum? The nicely > detailed "How To Upgrade To The Latest Release" can clearly be adapted > to this task, but are there any gotchas when you do that? This one works OK for upgrading from 4.1 to 4.2: 1) yum update 2) yum clean all 3) rpm -Uvh ftp://ftp.scientificlinux.org/linux/scientific/42/i386/SL/RPMS/yum-conf-42-3.SL.noarch.rpm 4) yum update yum [reboot] 5) yum upgrade 6) yum clean all [reboot] Replace the ftp URL to the corresponding one for upgrading to 4.1 from 4.0. I do not know if a direct upgrade can be done from 4.0 to 4.2.