Scientific Linux was designed so that users could easily change where their machines get their nightly updates.

Just Edit The Files

• /etc/yum.conf
• /etc/yum.d/yum.cron.primary
• /etc/yum.d/yum.cron.secondary

Customize yum-conf rpm

Scientific Linux has two yum rpm's. yum and yum-conf. This initially was so that yum could be upgraded without touching the configuration files. But it also allows people to completely change their yum-conf to point to wherever they wish.

Steps to customize your yum-conf rpm.
For the example we'll assume this is for release 3.0.4

1. Get the yum-conf src rpm. Get the appropriate rpm for your distribution
   ftp://ftp.scientificlinux.org/linux/scientific/30x/SRPMS
2. install the src.rpm and untar the source
   rpm -Uvh yum-conf-304-2.src.rpm
   cd /usr/src/redhat/SOURCES/
   tar xfz yum-conf-3.0.4.tar.gz
3. Edit the appopriate files. Changing them to point to your machines.
   yum-conf-304/etc/yum.conf
   yum-conf-304/etc/yum.d/yum.cron.primary
   yum-conf-304/etc/yum.d/yum.cron.secondary
4. Tar back up the directory
   tar cfz yum-conf-3.0.4.tar.gz yum-conf-304
5. cd to the spec directory
   cd /usr/src/redhat/SPECS/
Edit the spec file. Change the release to something appropriate
vi yum-conf-sl304.spec
6. Build your rpm
   rpmbuild -ba yum-conf-sl304.spec