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System Administration Commands                                      reboot(1M)

       reboot - restart the operating system

       /usr/sbin/reboot [-dlnq] [-f | -p] [boot_arguments]

       /usr/sbin/reboot [-f [-e environment] | -p] [-dlnq] [boot_arguments]

       The  reboot utility restarts the kernel. The kernel is loaded into mem‐
       ory by the PROM monitor, which transfers control to the loaded kernel.

       On x86 systems, when the -f flag is specified, the running kernel  will
       load  the  next  kernel into memory, then transfer control to the newly
       loaded kernel. This form of reboot is shown  in  the  second  synopsis,

       Although  reboot can be run by the super-user at any time, shutdown(1M)
       is normally used first to warn all users logged  in  of  the  impending
       loss of service. See shutdown(1M) for details.

       The reboot utility performs a sync(1M) operation on the disks, and then
       a multi-user reboot is initiated. See init(1M) for details. On x86 sys‐
       tems,  reboot  may  also  update the boot archive as needed to ensure a
       successful reboot.

       The reboot utility normally logs the reboot to the system  log  daemon,
       syslogd(1M),  and places a shutdown record in the login accounting file
       /var/adm/wtmpx. These actions are inhibited if the -n or -q options are

       Normally, the system reboots itself at power-up or after crashes.

       The following options are supported:


           Force  a  system  crash  dump before rebooting. See dumpadm(1M) for
           information on configuring system crash dumps.


           If -f is present, reboot to the specified boot environment.

           This option is currently available only on x86 systems.


           For x86 systems:

           Fast reboot, bypassing firmware and boot  loader.  The  new  kernel
           will  be loaded into memory by the running kernel, and control will
           be transferred to the newly loaded kernel. If  disk or kernel argu‐
           ments are specified, they must be specified before other boot argu‐

           For SPARC systems:

           Speeds up rebooting by skipping some POST tests.

           The service svc:/system/boot-config:default is enabled by  default.
           It  requires  solaris.system.shutdown  as  action_authorization and
           value_authorization. When the config/fastreboot_default property is
           set  to  true,  reboot  will behave as reboot -f. The value of this
           property can be changed using svccfg(1M) and svcadm(1M), to control
           the default reboot behavior.

           See EXAMPLES for details.


           Suppress  sending  a  message to the system log daemon, syslogd(1M)
           about who executed reboot.


           Avoid calling sync(2) and do not log the reboot to  syslogd(1M)  or
           to  /var/adm/wtmpx.  The  kernel still attempts to sync filesystems
           prior to reboot, except if the -d option is also present. If -d  is
           used with -n, the kernel does not attempt to sync file systems.


           Reboot  to prom. This flag can be used to reboot the system through
           firmware without changing the default reboot behavior as denoted by
           the  config/fastreboot_default property setting in system/boot-con‐
           fig service.

           The -p and -f options are mutually exclusive.


           Quick. Reboot quickly and ungracefully, without shutting down  run‐
           ning processes first.

       The following operands are supported:


           An  optional  boot_arguments  specifies  arguments to the uadmin(2)
           function that are passed  to  the  boot  program  and  kernel  upon
           restart.  The  form  and  list  of  arguments  is  described in the
           boot(1M) and kernel(1M) man pages. If the arguments are  specified,
           whitespace  between  them  is  replaced by single spaces unless the
           whitespace is quoted for the shell.  If  the  boot_arguments  begin
           with  a  hyphen,  they  must  be  preceded by the -- delimiter (two
           hyphens) to denote the end of the reboot argument list.

       Example 1 Passing the -r and -v Arguments to boot

       In the following example, the delimiter -- (two hyphens) must  be  used
       to separate the options of reboot from the arguments of boot(1M).

         example# reboot -dl -- -rv

       Example 2 Rebooting Using a Specific Disk and Kernel

       The following example reboots using a specific disk and kernel.

         example# reboot disk1 kernel.test/unix

       Example 3 Fast Rebooting

       The following examples use the -f option to perform fast reboots.

       If  the service svc:/system/boot-config:default is enabled and property
       config/fastreboot_default is set to true, the -f option can be omitted.

       On an x86 system, the following command reboots to the default entry in
       the GRUB (see grub(5)) menu file menu.lst.

         example# reboot -f

       The following command reboots to another UFS root disk.

         example# reboot -f -- '/dev/dsk/c1d0s0'

       The following command reboots to another ZFS root pool.

         example# reboot -f -- 'rpool/ROOT/root2'

       The  following  command  reboots  to  mykernel on the same disk with -k

         example# reboot -f -- '/platform/i86pc/mykernel/amd64/unix -k'

       The following command reboots to mykernel off another root disk mounted
       on /mnt.

         example# reboot -f -- '/mnt/platform/i86pc/mykernel/amd64/unix -k'

       The following command reboots to /platform/i86pc/kernel/$ISADIR/unix on
       another boot environment named second_root.

         example# reboot -f -e second_root

       The following command reboots to the same kernel with -kv options.

         example# reboot -f -- '-kv'

       The following commands disable the fast-reboot-by-default behavior.

         example# svccfg -s "system/boot-config:default" \
         setprop config/fastreboot_default=false
         example# svcadm refresh svc:/system/boot-config:default

       The following commands re-enable the fast-reboot-by-default behavior.

         example# svccfg -s "system/boot-config:default" \
         setprop config/fastreboot_default=true
         example# svcadm refresh svc:/system/boot-config:default

       Example 4 Rebooting to a Particular GRUB Menu

       The following commands will reboot to entry 2 in the GRUB menu.

         example# bootadm list-menu
           the location for the active GRUB menu is: /rpool/boot/grub/menu.lst
           default 0
           timeout 10
           0 zfsbe1
           1 zfsbe1 failsafe
           2 zfsbe2
           3 zfsbe2 Solaris xVM
           4 zfsbe2 failsafe
         example# reboot 2


           login accounting file

       See attributes(5) for descriptions of the following attributes:

       tab()  box;  cw(2.75i)  |cw(2.75i)  lw(2.75i)   |lw(2.75i)   ATTRIBUTE
       TYPEATTRIBUTE VALUE _ Availabilitysystem/core-os

       mdb(1),  boot(1M),  dumpadm(1M),  fsck(1M),  halt(1M),  init(1M),  ker‐
       nel(1M), shutdown(1M), svcadm(1M), svccfg(1M),  sync(1M),  syslogd(1M),
       sync(2), uadmin(2), reboot(3C), attributes(5), grub(5)

       The reboot utility does not execute the scripts in /etc/rcnum.d or exe‐
       cute shutdown actions in inittab(4). To ensure a complete  shutdown  of
       system  services, use shutdown(1M) or init(1M) to reboot a Solaris sys‐

SunOS 5.11                        22 Apr 2014                       reboot(1M)
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