Different ways to Shutdown or Reboot Your Linux System (Ubuntu)

Different ways to Shutdown or Reboot Your Linux System (Ubuntu)


                                             There are four different methods to shutdown or reboot your Linux System (Ubuntu).

*Shutdown or reboot is an Administrative task , so it require root privileges before you execute these commands.


*In Ubuntu you gain root privilege by writing sudo before any command.


Different ways to Shutdown or Reboot


1. By using init command.


Syntax


                sudo init runlevel
* 0 - halt
* 6 - Reboot


If we write

                    sudo init  0  //shutdown and halt the system ,  it is like shutdown in windows.

                    sudo init 6   //shutdown and reboot the system , it is like restart in windows.


*There are 7 different runlevel in linux from 0 to 6 so don't use other number with init if you are not sure about it.


2. By using shutdown command.

Syntax  


                        shutdown [-option]  time 


Example


                --> sudo shutdown -h now  //shutdown and halt the system ,  it is like shutdown in windows.

* now means 0 sec so above command shutdown your system immediately after you typed the command.


* instead of now you can specify time also.


* -h means halt

                  --> sudo shutdown -r now  //shutdown and reboot the system , it is like restart in windows.


* -r means reboot .


3. reboot command : reboot command shutdown and restart the system.

Example
  
                       sudo reboot   //shutdown and reboot the system , it is like restart in windows.


4. halt command :  halt command shutdown and halt the system.


Example
  
                       sudo halt   //shutdown and halt the system , it is like shutdown in windows.


*In Ubuntu  halt -h work same as halt does . 

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