On Mon, Nov 16, 2009 at 11:41 AM, Ben M. centos@rivint.com wrote:
I just notice that my 5.3 (updated to 5.4) Centos Xen stock install has different runlevels that my from scratch 5.4 install box.
5.3 --> 5/4
xend 0:off 1:off 2:on 3:on 4:on 5:on 6:off xendomains 0:off 1:off 2:on 3:on 4:on 5:on 6:off
5.4 "pure" xend 0:off 1:off 2:on 3:on 4:on 5:on 6:off xendomains 0:off 1:off 2:off 3:on 4:on 5:on 6:off
Should Level 2 on xendomains be on or off?
Ok I think the following is correct, but I don't have my notes available to compare with at the moment (and google is having issues for me (though gmail is working great)).
Runlevel 2 in the Red Hat/CentOS/Fedora control system is different from other operating systems and some other Linux's. Where some OS's will use boot levels as stages to run in (you have to go through 1 to get to 2), Linux operating systems in general considers them as seperate ways to start up an OS. And each Linux OS family has its own way of defining what they mean.
In the end, the important question is "Do you run at Runlevel 2?" Runlevel 2 and 4 are rarely used and each has different site definitions of what its being used for. Some sites use runlevel2 as multi-user/no-network, and other sites use it for multi-user/debugging (eg runlevel 3 but some changes to see what might have broken when we turned on X). Runlevel 4 is similarly used (eg its up to a site to define how they want to use it). I think Red Hat normally defines their runlevel 2 as multi-user/no-network which would mean xendomains should be off... however its probably