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INTRO(8)                    System Manager's Manual                   INTRO(8)



NAME
       intro - introduction to system maintenance and operation commands

DESCRIPTION
       This  section  contains  information  related  to system bootstrapping,
       operation and maintenance.  It describes all the server  processes  and
       daemons  that  run  on the system, as well as standalone (PROM monitor)
       programs.

       An 8V section number means one or more of the following:

       o  The man page documents System V behavior only.

       o  The man page documents default SunOS behavior, and System V behavior
          as it differs from the default behavior.  These System V differences
          are presented under SYSTEM V section headers.

       o  The man page documents behavior compliant with IEEE Std  1003.1-1988
          (POSIX.1).

       Disk  formatting  and labeling is done by format(8S).  Bootstrapping of
       the system is described in boot(8S),  openboot(8S)  and  init(8).   The
       standard  set  of commands run by the system when it boots is described
       in rc(8).  Related commands include those that check the consistency of
       file  systems,  fsck(8);  those  that  mount  and unmount file systems,
       mount(8); add swap devices, swapon(8); force completion of  outstanding
       file  system  I/O,  sync(2);  shutdown or reboot a running system shut-
       down(8), halt(8), and reboot(8); and, set the time on  a  machine  from
       the time on another machine rdate(8C).

       Creation  of  file  systems is discussed in mkfs(8) and newfs(8).  File
       system performance parameters can be  adjusted  with  tunefs(8).   File
       system backups and restores are described in dump(8) and restore(8).

       Procedures   for  adding  new  users  to  a  system  are  described  in
       adduser(8), using vipw(8) to lock the  password  file  during  editing.
       panic(8S)  which  describes  what  happens  when  the  system  crashes,
       savecore(8) which can be used to analyze system crash dumps.  Occasion-
       ally  useful  as adjuncts to the fsck(8) file system repair program are
       clri(8), dcheck(8), icheck(8), and ncheck(8).

       Configuring a new version of the kernel requires using the program con-
       fig(8);  major  system  bootstraps often require the use of mkproto(8).
       New devices are added to the /dev directory (once  device  drivers  are
       configured  into  the  system)  using  makedev(8)  and  mknod(8).   The
       installboot(8S) command can be used to install  freshly  compiled  pro-
       grams.  The catman(8) command preformats the on-line manual pages.

       Resource accounting is enabled by the accton command, and summarized by
       sa(8).  Login time accounting is performed by ac(8).  Disk  quotas  are
       managed using quot(8), quotacheck(8), quotaon(8), and repquota(8).

       A number of servers and daemon processes are described in this section.
       The update(8) daemon forces  delayed  file  system  I/O  to  occur  and
       cron(8) runs periodic events (such as removing temporary files from the
       disk periodically).  The syslogd(8) daemon maintains the  system  error
       log.   The init(8) process is the initial process created when the sys-
       tem boots.  It manages the reboot process and creates the initial login
       prompts  on the various system terminals, using getty(8).  The Internet
       super-server inetd(8C) invokes all other internet  servers  as  needed.
       These servers include the remote shell servers rshd(8C) and rexecd(8C),
       the remote  login  server  rlogind(8C),  the  FTP  and  TELNET  daemons
       ftpd(8C),  and  telnetd(8C),  the  TFTP  daemon tftpd(8C), and the mail
       arrival notification daemon comsat(8C).  Other network daemons  include
       the  `load average/who is logged in' daemon rwhod(8C), the routing dae-
       mon routed(8C), and the mail daemon sendmail(8).

       If network protocols are being debugged, then  the  protocol  debugging
       trace program trpt(8C) is often useful.  Remote magnetic tape access is
       provided by rsh and rmt(8C).  Remote line printer access is provided by
       lpd(8),  and  control  over  the  various  print  queues is provided by
       lpc(8).  Printer cost-accounting is done through pac(8).

       Network host tables may be gotten from the ARPA NIC using  gettable(8C)
       and converted to UNIX-system-usable format using htable(8).

   RPC and NFS daemons
       RPC and NFS daemons include:

              portmap   used by RPC based services.
              ypbind    used  by  the  Network  Information  Service  (NIS) to
                        locate the NIS server.  Note: the Network  Information
                        Service  (NIS)  was formerly known as Sun Yellow Pages
                        (YP).  The functionality of the two remains the  same;
                        only the name has changed.
              biod      used by NFS clients to read ahead to, and write behind
                        from, network file systems.
              nfsd      the NFS server process that responds to  NFS  requests
                        on NFS server machines.
              ypserv    the NIS server, typically run on each NFS server.
              rstatd    the  server  counterpart  of  the  remote  speedometer
                        tools.
              mountd    the mount server that runs on NFS server machines  and
                        responds  to  requests by other machines to mount file
                        systems.
              rwalld    used for broadcasting messages over the network.

LIST OF MAINTENANCE COMMANDS
       Name                Appears on PageDescription




                                  22 May 1991                         INTRO(8)