RHEL7: Boot, reboot, and shut down a system normally.

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Note: This is an RHCSA 7 exam objective.

Prerequisites

Switch on a physical server or a virtual machine (in this case, type: # virsh start vm).
Connect to the console.

Basic Management

To reboot the system, choose one command among these:

# reboot
# systemctl reboot
# shutdown -r now
# init 6
# telinit 6

To shutdown the system, choose one command among these:

# halt
# systemctl halt
# shutdown -h now
# init 0
# telinit 0

To switch off the system, choose one command among these:

# poweroff
# systemctl poweroff

Advanced Management

To suspend the system, type:

# systemctl suspend

To put the system into hibernation, type:

# systemctl hibernate

To put the system into hibernation and suspend it, type:

# systemctl hybrid-sleep

Additional Resources

Bob Cromwell provides some very interesting pages about Linux kernel details and the Linux boot process.

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algorisms
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algorisms

These also will work:

telinit 0 #shutdown
telinit 6 #reboot

reaz_mahmood
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reaz_mahmood

So I have used the systemctl halt command, it halted the system. Now, how do I get back to normal operations from here ? (I am on a virtual machine.)

gnutux95
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gnutux95

My two cents …

shutdown -r is better because it warns the other users and you can put a time to plan the reboot and a message.

reboot / init 6 to go fast but often if the server is not in production.

Rq : I think hibernation is not a good idea for server… it’s better to keep it for Linux Desktop to avoid to use too much swap when you have more than 64G RAM for instance.

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