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Solaris init states refer to the level of services provided by the system. The exact services and processes run at each init level are determined by the scripts in the /etc/rc#.d directories. The default service levels for each init state are listed below:
ok>) or security monitor (
>) prompt. It is safe to shut down the system when it is at this init state.
/usr) are mounted. This init state is often used for sensitive functions (such as kernel libc patches) or while troubleshooting a problem that is keeping the system from booting into multiuser mode.
boot -acommand. The system is taken to init 0 and an interactive boot is started.
The init states are defined in the
/etc/inittab file, which usually
points at the scripts in
/sbin/rcrun-level. These scripts in
turn examine the contents of the
The scripts in these directories whose names begin with the letter
are run in "stop" mode first in alphabetical order. Then the scripts whose names
begin with the letter
S are run in "start" mode in alphabetical order.
To get to a desired run level n, each of the rc (run control) scripts from 1
to n is run. To get to run level 0, the
K scripts are run in each
rc#.d directory between the current run level and 0 in reverse numerical
In the default configuration, the rc scripts accomplish the following tasks:
named, if appopriate.
kerbd(the Kerberos client daemon) if appropriate.
lpdaemons, as appropriate.
rpc.bootparamd, as appropriate.
/sbin/rc4is usually not defined. It can be used in a non-default configuration to achieve a tailored run level.
lockd(NFS client services).
initdefaultlevel from the
/sbin/rcS: This run level differs from 1 in the following particulars:
/usr/kvmfilesystems are checked and mounted (if necessary).
To find out current runlevel use who command:
$ who -rOutput:
. run-level 3 Mar 3 14:04 3 0 SSolaris changing runlevels after bootup
You need to use init command, for example change runlevel to 2.
# /sbin/init 2Solaris changing the default runlevel
An entry with initdefault (in /etc/inittab file) is scanned only when init is initially invoked. init uses this entry to determine which run level to enter initially.
Open /etc/inittab file:
# vi /etc/inittabFind out this entry:
Change is:3 to number you want, don't use S, 0, 6 ;). Save file.
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