Scientific Linux Release history Release history

| Scientific_Linux_Release | Architectures | RHEL_base | Scientific_Linux_release_date | RHEL_release_date | Delay |
|---|---|---|---|---|---|
| 4.4 | i386, x86_64 | 4.4 | 2006-10-09 | 2006-08-10 | 60d |
| 4.5 | i386, x86_64 | 4.5 | 2007-06-25 | 2007-05-01 | 55d |
| 4.6 | i386, x86-64 | 4.6 | 2008-03-12 | 2007-11-16 | 117d |
| 4.7 | i386, x86-64 | 4.7 | 2008-09-03 | 2008-07-24 | 41d |
| 4.8 | i386, x86-64 | 4.8 | 2009-07-28 | 2009-05-18 | 71d |
| 4.9 | i386, x86-64 | 4.9 | 2011-04-21 | 2011-02-16 | 64d |
| 5.0 | i386, x86-64 | 5 | 2007-05-14 | 2007-03-14 | 61d |
| 5.1 | i386, x86-64 | 5.1 | 2008-01-16 | 2007-11-07 | 70d |
| 5.2 | i386, x86-64 | 5.2 | 2008-06-26 | 2008-05-21 | 36d |
| 5.3 | i386, x86-64 | 5.3 | 2009-03-19 | 2009-01-20 | 58d |
| 5.4 | i386, x86-64 | 5.4 | 2009-11-04 | 2009-09-02 | 63d |
| 5.5 | i386, x86-64 | 5.5 | 2010-05-19 | 2010-03-31 | 49d |
| 5.6 | i386, x86-64 | 5.6 | 2011-06-21 | 2011-01-13 | 159d |
| 5.7 | i386, x86-64 | 5.7 | 2011-09-14 | 2011-07-21 | 55d |
| 5.8 | i386, x86-64 | 5.8 | 2012-04-24 | 2012-02-21 | 63d |