Shutdown computer using terminal in Ubuntu

f you want to shutdown your computer what do you do ? Simply go to shutdown button and click shutdown isn’t?

 

Have you ever wondered how would you shutdown your pc if your gdm (Graphical User Interface) is not working. Or you are only working in command line mood or running a computer user account with ssh(secured shell) ??

 

Shutdown command

The command used in ubuntu to shutdown is shutdown.

If you want to shutdown your computer right now enter the command below

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1. $ sudo shutdown -h now  

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1. $ sudo shutdown -h now  

 

or

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1. $ sudo shutdown -h 0  

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1. $ sudo shutdown -h 0  

 

Shutdown computer at a scheduled time

if you want to shutdown command at a scheduled time enter the following command

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1. $ sudo shutdown -h 12:00 "System is shutting down"   

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1. $ sudo shutdown -h 12:00 "System is shutting down"   

 

This will shutdown your computer on 12pm with sending this message to all user.

You can also use power off or halt command to do this.

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1. $sudo halt  

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1. $sudo halt  

 

or

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1. $sudo poweroff  

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1. $sudo poweroff  

 

Reboot computer

Use any of this following command

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1. $ sudo reboot  

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1. $ sudo reboot  

 

or

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1. $ sudo shutdown -r 0  

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1. $ sudo shutdown -r 0  

 

from: http://www.dscripts.net/2010/06/27/shutdown-computer-using-terminal-in-ubuntu/

 

解决 ubuntu 无法关机

 

1. Type in terminal:

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1. sudo gedit /etc/default/grub  

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1. sudo gedit /etc/default/grub  

 

2. Find the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

3. Change this to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"

4. Save the file and close the file.

 

5. Finally, in terminal:

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1. sudo update-grub  

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1. sudo update-grub  

 

 

I found it here: Dell Studio 1569 Cannot Shutdown in Ubuntu 11.10 or 12.04

 

 

Entering BIOS usually by pressing Del button when computer starting. Go to Advanced Settings and make sure APM is Enabled.

 

If you have installed Windows Operating System, and you succeed to shutdown your computer on Windows, it means your APM is Enabled.

 

If it still don’t fix your problem, try it in terminal,

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1. $ sudo gedit /etc/init.d/alsa-utils  

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1. $ sudo gedit /etc/init.d/alsa-utils  

 

Change gedit with your favorite text editor. This will open alsa-utils or if it doesn’t exist, create new one.

Type,

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1. ifconfig wlan0 down   
2. ifconfig eth0 down   
3. EXITSTATUS=0  

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1. ifconfig wlan0 down  
2. ifconfig eth0 down  
3. EXITSTATUS=0  

 

Save file, and try to shutdown Ubuntu.