HP Integrity rx6600 User's & Service Manual page 222

Booting and Shutting Down the Operating System
Booting and Shutting Down Linux
• Number of minutes to wait in the format +m, in which m is the number of minutes.
• now to immediately shut down; this is equivalent to using +0 to wait zero minutes.
For details, see the shutdown(8) Linux manpage. Also see the Linux manpage for the poweroff command.
To shut down Linux, follow these steps:
Step 1. Log in to Linux running on the system you want to shut down.
Step 2. Issue the shutdown command with the desired command-line options, and include the required
time argument to specify when the operating system shutdown is to occur.
For example, shutdown -r +20 shuts down and reboots the system in twenty minutes.
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Appendix B