On Thu, Feb 28, 2002 at 02:32:29PM -0700, tolls wrote:
> I believe OpenBSD only has basically two runlevels,
> multi-user and single user modes. As opposed to linux which has like
> runs levels from 1 to 6. Like I said this is my best recollection.
No.
Linux has SysV runlevels. One level is associated to a couple of programs
that have to run. For instance runlevel 3 will start all daemons, but no X,
while runlevel 5 will. The single user mode only means to start almost
nothing. Runlevels are just a set of scripts in /etc/init.d (linked from
/etc/rc.*) that are called when switching from one level to another one.
Everything happens in userland.
OpenBSD has three *security* levels. Security levels are handled by the
kernel. In securelevel 1 and 2, the *kernel* will refuse some operations
like changing firewall rules or changing file attributes. See man chflags
and man securelevel.
These are two really different things.
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