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Originally posted by tim
ok, but why is 4.8 eol 2006 too ?
while 4.9 is already dead ?
FreeBSD 4.8 (and 4.10, and 5.3) was designated as an "extended support" branch, meaning it is supported for at least two years after the release date. FreeBSD 4.4, 4.5, 4.6, 4.7, and 4.9 were normal releases, which are supported for at least one year; FreeBSD 5.0, 5.1, and 5.2 were "early adopter" releases, which are supported for at least 6 months (but usually longer).
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Any step by step how-to upgrade from 4.9 to 4.10
or 5.x for a specific ev1 server ?
I suggest that you use cvsup to check out a RELENG_4_10 source tree, then proceed with the usual buildworld / buildkernel / installkernel / installworld / mergemaster stages. Going from 4.9 to 4.10 there are relatively few changes, so this should be very safe.
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Also, I have multiple jails under my 4.9 system at the moment
how do I go for upgrading them , upgrade the outer jail system to 4.10 first then the jail to 4.10 ?
Can a 4.9 jail run under a 4.10 system and the other way around ?
As far as jails are concerned, the only version mismatch which matters is between the world inside the jail and the kernel outside the jail. As a general rule, you might have problems with some kernel utilities (ps, top, ifconfig) with such a world/kernel mismatch, but your jailed users are quite likely to not be using those anyway.
That said, I suggest that you update both the host system and all of the jails.