REBOOT(8)           UNIX Programmer's Manual            REBOOT(8)

NAME
     reboot - UNIX bootstrapping procedures

SYNOPSIS
     /etc/reboot [ -n ] [ -q ] [ -f ] [ -a ] [ -h ] [ -d ]

DESCRIPTION
     UNIX is started by placing it in memory at location zero and
     transferring to zero.  Since the system is not reentrant, it
     is necessary to read it in from disk or tape each time it is
     to be bootstrapped.

     Rebooting a running system. When a UNIX is running and a
     reboot is desired, _s_h_u_t_d_o_w_n(8) is normally used.  If there
     are no users then /_e_t_c/_r_e_b_o_o_t can be used.  _R_e_b_o_o_t normally
     causes the disks to be synced, and then a multi-user reboot
     (as described below) is initiated.  This causes a system to
     be booted and an automatic disk check to be performed.  If
     all this succeeds without incident, the system is then
     brought up multiuser.

     Options to _r_e_b_o_o_t are:

     -n   option avoids the sync.  It is necessary to reboot
          without a sync after rebuilding the root file system.

     -q   reboots quickly and ungracefully, without shutting down
          running processes first.

     -f   fast boot, omitting the automatic file system con-
          sistency check.

     -a   _b_o_o_t(8) will ask for the name of the system to be
          booted, rather than immediately booting the default
          system.

     -h   halt the system rather than rebooting.

     -d   dump memory onto the dump device, usually part of swap,
          before rebooting.  The dump is done in the same way as
          after a panic.

     Power fail and crash recovery. The system will normally
     reboot itself after crashes and power failures (if the con-
     tents of low memory are intact).  An automatic consistency
     check of the file systems will be performed and unless this
     fails the system will resume multiuser operations.

     Cold starts. These are processor dependent.  See _b_o_o_t(8).

FILES
     /unix                    system code

Printed 8/2/83                                                  1

REBOOT(8)           UNIX Programmer's Manual            REBOOT(8)

     /usr/src/sys/mdec/xxboot block 0 bootstrap for boot device
     xx
     /boot                    system bootstrap, on boot disk file
     system
     /etc/init
     /etc/rc                  script to check file systems and
     bring the system up

SEE ALSO
     crash(8), fsck(8), init(8), rc(8), shutdown(8)

Printed 8/2/83                                                  2