Installation guide

Refer to the rc2(8) reference page for more information.
4.1.2.4 The rc3.d Directory and rc3 Run Command Script
The /sbin/rc3 script contains run commands that enable initialization of
the system to a networked multiuser state, run level 3. As described
previously, the inittab file contains entries that the init program reads
and acts on when the system is booting or changing its state to run level 3.
For example:
s3:3:wait:/sbin/rc3 < /dev/console > /dev/console 2>&1
Notice that the rc3 script is the specified command. In addition to
commands listed in the script itself, rc3 contains instructions to run
commands found in the /sbin/rc3.d directory. These commands are
linked to files in the init.d directory. The script defines the conditions
under which the commands execute; some commands run if the system is
booting, other commands run if the system is changing run levels.
By convention, files in the /sbin/rc3.d directory begin with the letter "S"
and are followed by a 2-digit number and a file name. For example, a long
listing of the rc3.d directory contents would look similar to the following:
lrwxr-xr-x 1 root staff 14 Jan 04 10:37 S00inet -> ../init.d/inet
lrwxr-xr-x 1 root staff 15 Jan 04 10:31 S01quota -> ../init.d/quota
lrwxr-xr-x 1 root staff 14 Jan 04 10:52 S04uucp -> ../init.d/uucp
lrwxr-xr-x 1 root staff 17 Jan 04 10:31 S05settime -> ../init.d/settime
lrwxr-xr-x 1 root staff 18 Jan 04 10:31 S08startlmf -> ../init.d/startlmf
lrwxr-xr-x 1 root staff 16 Jan 04 10:31 S10syslog -> ../init.d/syslog
lrwxr-xr-x 1 root staff 17 Jan 04 10:37 S11gateway -> ../init.d/gateway
lrwxr-xr-x 1 root staff 15 Jan 04 10:37 S12route -> ../init.d/route
lrwxr-xr-x 1 root staff 14 Jan 04 10:37 S13rwho -> ../init.d/rwho
lrwxr-xr-x 1 root staff 15 Jan 04 10:41 S15named -> ../init.d/named
lrwxr-xr-x 1 root staff 13 Jan 04 10:37 S18nis -> ../init.d/nis
lrwxr-xr-x 1 root staff 18 Jan 04 10:41 S20nfsmount -> ../init.d/nfsmount
lrwxr-xr-x 1 root staff 16 Jan 04 10:31 S22loader -> ../init.d/loader
lrwxr-xr-x 1 root staff 18 Jan 04 10:31 S23kloadsrv -> ../init.d/kloadsrv
lrwxr-xr-x 1 root staff 14 Jan 04 10:31 S24kmod -> ../init.d/kmod
lrwxr-xr-x 1 root staff 18 Jan 04 10:31 S25preserve -> ../init.d/preserve
lrwxr-xr-x 1 root staff 13 Jan 04 10:31 S26sia -> ../init.d/sia
lrwxr-xr-x 1 root staff 20 Jan 04 10:31 S30rmtmpfiles -> ../init.d/rmtmpfiles
lrwxr-xr-x 1 root staff 13 Jan 04 10:41 S35nfs -> ../init.d/nfs
lrwxr-xr-x 1 root staff 18 Jan 04 10:31 S40sendmail -> ../init.d/sendmail
lrwxr-xr-x 1 root staff 15 Jan 04 10:37 S45xntpd -> ../init.d/xntpd
lrwxr-xr-x 1 root staff 15 Jan 04 10:37 S50snmpd -> ../init.d/snmpd
lrwxr-xr-x 1 root staff 15 Jan 04 10:37 S55inetd -> ../init.d/inetd
lrwxr-xr-x 1 root staff 14 Jan 04 10:31 S57cron -> ../init.d/cron
lrwxr-xr-x 1 root staff 13 Jan 04 10:30 S58lat -> ../init.d/lat
lrwxr-xr-x 1 root staff 14 Jan 04 10:30 S60motd -> ../init.d/motd
lrwxr-xr-x 1 root staff 13 Jan 04 10:44 S65lpd -> ../init.d/lpd
lrwxr-xr-x 1 root staff 14 Jan 04 10:42 S75acct -> ../init.d/acct
lrwxr-xr-x 1 root staff 17 Jan 04 10:30 S80crashdc -> ../init.d/crashdc
lrwxr-xr-x 1 root staff 13 Jan 04 10:30 S95xdm -> ../init.d/xdm
In general, the system starts commands that begin with the letter "S" and
stops commands that begin with the letter "K." Commands that begin with
4–12 Customizing the System Environment