Hello,

Following the upstream release cycle, Scientific Linux 5 will reach End 
of Life March 31 2017.

After this date no additional updates will be published for Scientific 
Linux 5.  This means no security updates for SL5 will be published after 
March 31 2017.

After March 31 2017:
- The installation trees will be moved into the obsolete directory.
- Kickstart and yum operations against the old repository locations will 
no longer work.

The files themselves will remain available under the 'obsolete' directory.

Users of Scientific Linux 5 should evaluate options for migrating to an 
actively maintained operating system.

Scientific Linux 6 and Scientific Linux 7 are actively maintained at 
this time.