Difference between shutdown options
I'd like to know what the difference is between shutdown -H (halt the machine) and shutdown -P (poweroff the machine).
I understand what poweroff means; it's rather self-explanatory. But what exactly is "halt"?
Background:
I need to turn off my PC with a terminal-command because otherwise the shutdown/reboot hangs.
I found the command shutdown -H -P +0 here.
It seems to be combination of the two options and it really works fine.
P.S. I have Lubuntu 18.04.2, 64 bit
shutdown
edited yesterday
wjandrea
9,35842664
asked yesterday
RosikaRosika
16811
add a comment |
I'd like to know what the difference is between shutdown -H (halt the machine) and shutdown -P (poweroff the machine).
I understand what poweroff means; it's rather self-explanatory. But what exactly is "halt"?
Background:
I need to turn off my PC with a terminal-command because otherwise the shutdown/reboot hangs.
I found the command shutdown -H -P +0 here.
It seems to be combination of the two options and it really works fine.
P.S. I have Lubuntu 18.04.2, 64 bit
shutdown
edited yesterday
wjandrea
9,35842664
asked yesterday
RosikaRosika
16811
1
Why not try and find the source of the shutdown/reboot problem? When it hangs, try hitting the ESC key and see if it brings up a text log of the shutdown/reboot process. Look at any FAIL entries, or the last few entries, for a clue.
– heynnema
yesterday
1
@ heynnema: It´s a bit difficult. Some other people experience the same problem. Shutdown/reboot hangs at a certain point: "kvm: exiting hardware virtualization". See also: unix.stackexchange.com/questions/188747/… . The easiest way turns out to be "poweroff".
– Rosika
yesterday
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
yesterday
3
Possible duplicate of Why doesn't running "sudo shutdown now" shut down?
– heemayl
16 hours ago
add a comment |
I'd like to know what the difference is between shutdown -H (halt the machine) and shutdown -P (poweroff the machine).
I understand what poweroff means; it's rather self-explanatory. But what exactly is "halt"?
Background:
I need to turn off my PC with a terminal-command because otherwise the shutdown/reboot hangs.
I found the command shutdown -H -P +0 here.
It seems to be combination of the two options and it really works fine.
P.S. I have Lubuntu 18.04.2, 64 bit
shutdown
edited yesterday
wjandrea
9,35842664
asked yesterday
RosikaRosika
16811
I'd like to know what the difference is between shutdown -H (halt the machine) and shutdown -P (poweroff the machine).
I understand what poweroff means; it's rather self-explanatory. But what exactly is "halt"?
Background:
I need to turn off my PC with a terminal-command because otherwise the shutdown/reboot hangs.
I found the command shutdown -H -P +0 here.
It seems to be combination of the two options and it really works fine.
P.S. I have Lubuntu 18.04.2, 64 bit
shutdown
shutdown
edited yesterday
wjandrea
9,35842664
asked yesterday
RosikaRosika
16811
edited yesterday
wjandrea
9,35842664
asked yesterday
RosikaRosika
16811
edited yesterday
wjandrea
9,35842664
edited yesterday
wjandrea
9,35842664
edited yesterday
wjandrea
9,35842664
9,35842664
asked yesterday
RosikaRosika
16811
asked yesterday
RosikaRosika
16811
asked yesterday
RosikaRosika
16811
16811
1
Why not try and find the source of the shutdown/reboot problem? When it hangs, try hitting the ESC key and see if it brings up a text log of the shutdown/reboot process. Look at any FAIL entries, or the last few entries, for a clue.
– heynnema
yesterday
1
@ heynnema: It´s a bit difficult. Some other people experience the same problem. Shutdown/reboot hangs at a certain point: "kvm: exiting hardware virtualization". See also: unix.stackexchange.com/questions/188747/… . The easiest way turns out to be "poweroff".
– Rosika
yesterday
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
yesterday
3
Possible duplicate of Why doesn't running "sudo shutdown now" shut down?
– heemayl
16 hours ago
add a comment |
1
Why not try and find the source of the shutdown/reboot problem? When it hangs, try hitting the ESC key and see if it brings up a text log of the shutdown/reboot process. Look at any FAIL entries, or the last few entries, for a clue.
– heynnema
yesterday
1
@ heynnema: It´s a bit difficult. Some other people experience the same problem. Shutdown/reboot hangs at a certain point: "kvm: exiting hardware virtualization". See also: unix.stackexchange.com/questions/188747/… . The easiest way turns out to be "poweroff".
– Rosika
yesterday
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
yesterday
3
Possible duplicate of Why doesn't running "sudo shutdown now" shut down?
– heemayl
16 hours ago
1
1
Why not try and find the source of the shutdown/reboot problem? When it hangs, try hitting the ESC key and see if it brings up a text log of the shutdown/reboot process. Look at any FAIL entries, or the last few entries, for a clue.
– heynnema
yesterday
Why not try and find the source of the shutdown/reboot problem? When it hangs, try hitting the ESC key and see if it brings up a text log of the shutdown/reboot process. Look at any FAIL entries, or the last few entries, for a clue.
– heynnema
yesterday
1
1
@ heynnema: It´s a bit difficult. Some other people experience the same problem. Shutdown/reboot hangs at a certain point: "kvm: exiting hardware virtualization". See also: unix.stackexchange.com/questions/188747/… . The easiest way turns out to be "poweroff".
– Rosika
yesterday
@ heynnema: It´s a bit difficult. Some other people experience the same problem. Shutdown/reboot hangs at a certain point: "kvm: exiting hardware virtualization". See also: unix.stackexchange.com/questions/188747/… . The easiest way turns out to be "poweroff".
– Rosika
yesterday
1
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
yesterday
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
yesterday
3
3
Possible duplicate of Why doesn't running "sudo shutdown now" shut down?
– heemayl
16 hours ago
Possible duplicate of Why doesn't running "sudo shutdown now" shut down?
– heemayl
16 hours ago
add a comment |
2 Answers
2
active
oldest
votes
Make it easy and use the command
poweroff
It works with my Lubuntu 18.04 LTS.
halt means flush buffers, unmount drives, close all processes in a graceful way. But not power off (though some systems may power off anyway). So the hardware is still provided with power.
After halt a hard power off (pressing the power button or unplugging the power supply) will not damage the system, because it is already halted in a graceful way.
answered yesterday
sudodussudodus
25.4k32978
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
add a comment |
From the man page of shutdown:
-H
Requests that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the system
Halted here means it is going to wait for a user action. That can be pressing the power down button and holding it to stop the machine. But also pressing a key that would restart the machine. That can be useful if you want to enter BIOS of the machine.
-P
Requests that the system be powered off after it has been brought down.
+0
it the time it has to wait in minutes
So... -P can, depending on the system, already be part of the -H option. You need the -P if the -H does not power down by itself. What actually happens is part of ACPI and the implementation of it can be buggy so for some it works for others not so ... The general idea when giving a solution is to try to cover all the bases and that would be to use both: -H and -P.
edited yesterday
N0rbert
24.3k851115
answered yesterday
RinzwindRinzwind
208k28400534
8
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Make it easy and use the command
poweroff
It works with my Lubuntu 18.04 LTS.
halt means flush buffers, unmount drives, close all processes in a graceful way. But not power off (though some systems may power off anyway). So the hardware is still provided with power.
After halt a hard power off (pressing the power button or unplugging the power supply) will not damage the system, because it is already halted in a graceful way.
answered yesterday
sudodussudodus
25.4k32978
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
add a comment |
Make it easy and use the command
poweroff
It works with my Lubuntu 18.04 LTS.
halt means flush buffers, unmount drives, close all processes in a graceful way. But not power off (though some systems may power off anyway). So the hardware is still provided with power.
After halt a hard power off (pressing the power button or unplugging the power supply) will not damage the system, because it is already halted in a graceful way.
answered yesterday
sudodussudodus
25.4k32978
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
add a comment |
Make it easy and use the command
poweroff
It works with my Lubuntu 18.04 LTS.
halt means flush buffers, unmount drives, close all processes in a graceful way. But not power off (though some systems may power off anyway). So the hardware is still provided with power.
After halt a hard power off (pressing the power button or unplugging the power supply) will not damage the system, because it is already halted in a graceful way.
answered yesterday
sudodussudodus
25.4k32978
Make it easy and use the command
poweroff
It works with my Lubuntu 18.04 LTS.
halt means flush buffers, unmount drives, close all processes in a graceful way. But not power off (though some systems may power off anyway). So the hardware is still provided with power.
After halt a hard power off (pressing the power button or unplugging the power supply) will not damage the system, because it is already halted in a graceful way.
answered yesterday
sudodussudodus
25.4k32978
answered yesterday
sudodussudodus
25.4k32978
answered yesterday
sudodussudodus
25.4k32978
answered yesterday
sudodussudodus
25.4k32978
25.4k32978
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
add a comment |
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
This is a great answer. Explained clearly and unambiguously.
– Clonkex
yesterday
add a comment |
From the man page of shutdown:
-H
Requests that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the system
Halted here means it is going to wait for a user action. That can be pressing the power down button and holding it to stop the machine. But also pressing a key that would restart the machine. That can be useful if you want to enter BIOS of the machine.
-P
Requests that the system be powered off after it has been brought down.
+0
it the time it has to wait in minutes
So... -P can, depending on the system, already be part of the -H option. You need the -P if the -H does not power down by itself. What actually happens is part of ACPI and the implementation of it can be buggy so for some it works for others not so ... The general idea when giving a solution is to try to cover all the bases and that would be to use both: -H and -P.
edited yesterday
N0rbert
24.3k851115
answered yesterday
RinzwindRinzwind
208k28400534
8
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
add a comment |
From the man page of shutdown:
-H
Requests that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the system
Halted here means it is going to wait for a user action. That can be pressing the power down button and holding it to stop the machine. But also pressing a key that would restart the machine. That can be useful if you want to enter BIOS of the machine.
-P
Requests that the system be powered off after it has been brought down.
+0
it the time it has to wait in minutes
So... -P can, depending on the system, already be part of the -H option. You need the -P if the -H does not power down by itself. What actually happens is part of ACPI and the implementation of it can be buggy so for some it works for others not so ... The general idea when giving a solution is to try to cover all the bases and that would be to use both: -H and -P.
edited yesterday
N0rbert
24.3k851115
answered yesterday
RinzwindRinzwind
208k28400534
8
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
add a comment |
From the man page of shutdown:
-H
Requests that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the system
Halted here means it is going to wait for a user action. That can be pressing the power down button and holding it to stop the machine. But also pressing a key that would restart the machine. That can be useful if you want to enter BIOS of the machine.
-P
Requests that the system be powered off after it has been brought down.
+0
it the time it has to wait in minutes
So... -P can, depending on the system, already be part of the -H option. You need the -P if the -H does not power down by itself. What actually happens is part of ACPI and the implementation of it can be buggy so for some it works for others not so ... The general idea when giving a solution is to try to cover all the bases and that would be to use both: -H and -P.
edited yesterday
N0rbert
24.3k851115
answered yesterday
RinzwindRinzwind
208k28400534
From the man page of shutdown:
-H
Requests that the system be either halted or powered off after it has been brought down, with the choice as to which left up to the system
Halted here means it is going to wait for a user action. That can be pressing the power down button and holding it to stop the machine. But also pressing a key that would restart the machine. That can be useful if you want to enter BIOS of the machine.
-P
Requests that the system be powered off after it has been brought down.
+0
it the time it has to wait in minutes
So... -P can, depending on the system, already be part of the -H option. You need the -P if the -H does not power down by itself. What actually happens is part of ACPI and the implementation of it can be buggy so for some it works for others not so ... The general idea when giving a solution is to try to cover all the bases and that would be to use both: -H and -P.
edited yesterday
N0rbert
24.3k851115
answered yesterday
RinzwindRinzwind
208k28400534
edited yesterday
N0rbert
24.3k851115
edited yesterday
N0rbert
24.3k851115
edited yesterday
N0rbert
24.3k851115
24.3k851115
answered yesterday
RinzwindRinzwind
208k28400534
answered yesterday
RinzwindRinzwind
208k28400534
answered yesterday
RinzwindRinzwind
208k28400534
208k28400534
8
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
add a comment |
8
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
8
8
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
Recall that older computers (without ACPI) couldn't turn themselves off. Witness Windows 95's "It is now safe to turn off your computer" screen.
– Roger Lipscombe
yesterday
add a comment |
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1
Why not try and find the source of the shutdown/reboot problem? When it hangs, try hitting the ESC key and see if it brings up a text log of the shutdown/reboot process. Look at any FAIL entries, or the last few entries, for a clue.
– heynnema
yesterday
1
@ heynnema: It´s a bit difficult. Some other people experience the same problem. Shutdown/reboot hangs at a certain point: "kvm: exiting hardware virtualization". See also: unix.stackexchange.com/questions/188747/… . The easiest way turns out to be "poweroff".
– Rosika
yesterday
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
yesterday
3
Possible duplicate of Why doesn't running "sudo shutdown now" shut down?
– heemayl
16 hours ago