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Homework and Emergencies Emergency UNIX and Linux Support Rebooting 3 to 1 Cluster nodes. Post 302423693 by lufen on Friday 21st of May 2010 05:47:16 PM
Old 05-21-2010
If you want to shutdown and reboot the whole cluster at once, then yes scshutdown is your command.
If you only want to restart each of the nodes without having to shutdown your application, then you have to reboot each one of the nodes that is not running the app.
Failover the app and reboot the last node.
 

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HALT(8) 							       halt								   HALT(8)

NAME
halt, poweroff, reboot - Halt, power-off or reboot the machine SYNOPSIS
halt [OPTIONS...] poweroff [OPTIONS...] reboot [OPTIONS...] DESCRIPTION
halt, poweroff, reboot may be used to halt, power-off or reboot the machine. OPTIONS
The following options are understood: --help Prints a short help text and exits. --halt Halt the machine, regardless of which one of the three commands is invoked. -p, --poweroff Power-off the machine, regardless of which one of the three commands is invoked. --reboot Reboot the machine, regardless of which one of the three commands is invoked. -f, --force Force immediate halt, power-off, reboot. Do not contact the init system. -w, --wtmp-only Only write wtmp shutdown entry, do not actually halt, power-off, reboot. -d, --no-wtmp Do not write wtmp shutdown entry. --no-wall Do not send wall message before halt, power-off, reboot. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. NOTES
These are legacy commands available for compatibility only. SEE ALSO
systemd(1), systemctl(1), shutdown(8), wall(1) systemd 208 HALT(8)
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