Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
RC(8)			    System Manager's Manual			 RC(8)

       rc, rc.boot, rc.local - command scripts for auto-reboot and daemons




       rc  and rc.boot are command scripts that	are invoked by init(8) to per-
       form file system	housekeeping and to start system daemons.  rc.local is
       a  script  for  commands	 that are pertinent only to a specific site or
       client machine.

       rc.boot sets the	machine	name and, if on	SunOS 4.1.1 Rev	 B  or	later,
       invokes	ifconfig,  which  uses RARP to obtain the machine's IP address
       from the	NIS network.  Then a "whoami" bootparams request  is  used  to
       retrieve	 the  system's	hostname,  NIS domain name and default router.
       The ifconfig and	hostconfig programs set	the system's hostname, IP  ad-
       dress, NIS domain name, and default router in the kernel.

       If coming up multi-user,	rc.boot	runs fsck(8) with the -p option.  This
       "preens"	the disks of minor inconsistencies  resulting  from  the  last
       system  shutdown	and checks for serious inconsistencies caused by hard-
       ware or software	failure.  If fsck(8) detects a serious	disk  problem,
       it  returns  an	error  and init(8) brings the system up	in single-user
       mode.  When coming up single-user, when init(8)	is  invoked  by	 fast-
       boot(8),	or when	it is passed the -b flag from boot(8S),	functions per-
       formed in the rc.local file, including this disk	check, are skipped.

       Next, rc	runs.  If the system came up single-user,  rc  runs  when  the
       single-user  shell terminates (see init(8)).  It	mounts 4.2 filesystems
       and spawns a shell for /etc/rc.local,  which  mounts  NFS  filesystems,
       runs  sysIDtool	(if on SunOS 4.1.1 Rev B or later) to set the system's
       configuration information into local configuration  files,  and	starts
       local  daemons.	 After	rc.local  returns, rc starts standard daemons,
       preserves editor	files, clears /tmp, starts system accounting  (if  ap-
       plicable),  starts the network (where applicable), and if enabled, runs
       savecore(8) to preserve the core	image after a crash.

       These files operate as described	above with the following variations:

       fsck(8) is invoked with the -y option to	prevent	 users	being  put  in
       single-user mode	by happenstance.

       rc.boot	invokes	 netconfig(8C) to configure the	system for the network
       before booting.	netconfig is invoked before  the  /usr	filesystem  is
       mounted,	because	/usr might be mounted from a server.  netconfig	writes
       /etc/net.conf unless the	-n option  is  specified,  controlling	system

       rc.boot dynamically loads device	drivers.

       rc  invokes  any	 programs found	in /var/recover	to clean up any	opera-
       tions partially completed when the system crashed or was	shut down.

       rc.local	starts the automounter.

       The file	/etc/net.conf stores these environment variables: The  VERBOSE
       environment variable controls the verbosity of the messages from	the rc
       script; its value is taken from NVRAM.  The NETWORKED environment vari-
       able  controls  whether	services useful	only on	a networked system are
       started in /etc/rc.local.  The PNP environment variable,	set up	during
       initial	system installation, controls whether local network configura-
       tion information	is used	or whether that	 information  comes  from  the
       network.	  (Using  automatic system installation	causes all systems ex-
       cept boot servers to get	this information from the network,  facilitat-
       ing  network reconfiguration.)  The HOSTNAME and	DOMAINNAME environment
       variables, used together, help determine	 if  this  system  is  a  boot
       server or, with PNP set to no, control the host name and	domain name.


       automount(8),   boot(8S),   fastboot(8),	 hostconfig(8),	 ifconfig(8C),
       init(8),	reboot(8), savecore(8),	netconfig(8C)

       The system message file /var/adm/messages is no longer created automat-

			       14 December 1990				 RC(8)


Want to link to this manual page? Use this URL:

home | help