The old HP-UX (version 9 and previous) definitely had a BSD-ish flavor, and I agree that there is a "dual heritage", but starting in 10.0, HP claimed it as SysVr4... At any rate, I agree that going from HP-UX to RHEL should be pretty simple and I wouldn't want to go the other way, either :) Kevin
________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of John Haxby Sent: Friday, July 03, 2009 2:20 AM To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list Subject: Re: [rhelv5-list] Migrating HPUX to RHEL5 2009/7/2 Collins, Kevin [BEELINE] <[email protected]> I may be misunderstanding what you are saying, but HP-UX is a SysVr4 based platform, not a BSD based platform. You might like to think so :-) When I worked at HP (some time ago now) I did at first think that HP/UX was SVR4 based: lots of the user-land stuff looks like SVR4. However, it does have something of a dual-heritage and I'm pretty sure that the kernel came from the BSD kernel originally. Having said that, HP/UX doesn't look like either. I do recall, however, that as I went through different versions (I left at around 11.11i) that the differences between HP/UX and Red Hat became less and less noticeable, at least from a user perspective. There were still gotchas (and presumably still are) but they tended to be more that things worked better on Linux and on HP/UX. Going forward from HP/UX to Linux was generally quite straightforward (once the compiler toolchain had been sorted out in the build system) but going back did tend to be frustrating on occasion. Remember OpenMail? jch
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