Timmy wrote: > HI, > Can it be installed on top of the SL 5.1?? That depends on what you mean by "on top of" SL 5.1 If you mean do an install (not and upgrade) on a SL 5.1 system without reformatting the drive? Yes and No Yes - it will actually do that No - you won't have a working system, or at least not working well. The easiest ways to update from SL 5.1 to SL 5.2 is by yum. The instructions are here https://www.scientificlinux.org/documentation/howto/upgrade.5x Troy -- __________________________________________________ Troy Dawson [log in to unmask] (630)840-6468 Fermilab ComputingDivision/LCSI/CSI DSS Group __________________________________________________