Difference between shutdown options [duplicate]
This question already has an answer here:
Why doesn't running “sudo shutdown now” shut down?
4 answers
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 Mar 20 at 15:15
wjandrea
9,45042664
asked Mar 20 at 12:58
RosikaRosika
16811
marked as duplicate by heemayl, karel, Fabby, Eric Carvalho, N0rbert 2 days ago
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
This question already has an answer here:
Why doesn't running “sudo shutdown now” shut down?
4 answers
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 Mar 20 at 15:15
wjandrea
9,45042664
asked Mar 20 at 12:58
RosikaRosika
16811
marked as duplicate by heemayl, karel, Fabby, Eric Carvalho, N0rbert 2 days ago
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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
Mar 20 at 13:34
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
Mar 20 at 15:39
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
Mar 20 at 19:54
add a comment |
This question already has an answer here:
Why doesn't running “sudo shutdown now” shut down?
4 answers
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 Mar 20 at 15:15
wjandrea
9,45042664
asked Mar 20 at 12:58
RosikaRosika
16811
This question already has an answer here:
Why doesn't running “sudo shutdown now” shut down?
4 answers
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
This question already has an answer here:
Why doesn't running “sudo shutdown now” shut down?
4 answers
shutdown
shutdown
edited Mar 20 at 15:15
wjandrea
9,45042664
asked Mar 20 at 12:58
RosikaRosika
16811
edited Mar 20 at 15:15
wjandrea
9,45042664
asked Mar 20 at 12:58
RosikaRosika
16811
edited Mar 20 at 15:15
wjandrea
9,45042664
edited Mar 20 at 15:15
wjandrea
9,45042664
edited Mar 20 at 15:15
wjandrea
9,45042664
9,45042664
asked Mar 20 at 12:58
RosikaRosika
16811
asked Mar 20 at 12:58
RosikaRosika
16811
asked Mar 20 at 12:58
RosikaRosika
16811
16811
marked as duplicate by heemayl, karel, Fabby, Eric Carvalho, N0rbert 2 days ago
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
marked as duplicate by heemayl, karel, Fabby, Eric Carvalho, N0rbert 2 days ago
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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
Mar 20 at 13:34
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
Mar 20 at 15:39
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
Mar 20 at 19:54
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
Mar 20 at 13:34
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
Mar 20 at 15:39
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
Mar 20 at 19:54
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
Mar 20 at 13:34
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
Mar 20 at 13:34
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
Mar 20 at 15:39
@ 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
Mar 20 at 15:39
1
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
Mar 20 at 19:54
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
Mar 20 at 19:54
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 Mar 20 at 14:26
sudodussudodus
25.5k33078
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
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 Mar 20 at 21:00
N0rbert
24.5k852115
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
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
Mar 20 at 16:22
add a comment |
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 Mar 20 at 14:26
sudodussudodus
25.5k33078
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
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 Mar 20 at 14:26
sudodussudodus
25.5k33078
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
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 Mar 20 at 14:26
sudodussudodus
25.5k33078
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 Mar 20 at 14:26
sudodussudodus
25.5k33078
answered Mar 20 at 14:26
sudodussudodus
25.5k33078
answered Mar 20 at 14:26
sudodussudodus
25.5k33078
answered Mar 20 at 14:26
sudodussudodus
25.5k33078
25.5k33078
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
add a comment |
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
This is a great answer. Explained clearly and unambiguously.
– Clonkex
Mar 20 at 22:09
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 Mar 20 at 21:00
N0rbert
24.5k852115
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
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
Mar 20 at 16:22
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 Mar 20 at 21:00
N0rbert
24.5k852115
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
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
Mar 20 at 16:22
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 Mar 20 at 21:00
N0rbert
24.5k852115
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
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 Mar 20 at 21:00
N0rbert
24.5k852115
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
edited Mar 20 at 21:00
N0rbert
24.5k852115
edited Mar 20 at 21:00
N0rbert
24.5k852115
edited Mar 20 at 21:00
N0rbert
24.5k852115
24.5k852115
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
answered Mar 20 at 13:23
RinzwindRinzwind
209k28401537
209k28401537
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
Mar 20 at 16:22
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
Mar 20 at 16:22
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
Mar 20 at 16:22
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
Mar 20 at 16:22
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
Mar 20 at 13:34
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
Mar 20 at 15:39
1
@sudodus Thanks for posting an answer. You should probably delete your comment now.
– wizzwizz4
Mar 20 at 19:54