View source for Adding custom entries to GRUB 2

The configuration files of the bootloader ''GRUB 2'' are located in the folder ''/etc/grub.d/''. To add custom entries to the bootloader, the file ''40_custom'' has to be modified. Following the unmodified version of this file is shown.

 #!/bin/sh
 exec tail -n +3 $0
 # This file provides an easy way to add custom menu entries.  Simply type the
 # menu entries you want to add after this comment.  Be careful not to change
 # the 'exec tail' line above.

Custom menu entries can be added to the end of this file. An examplary modification of the file ''40_custom'', with two entries to reboot or halt the system, is shown below.

 #!/bin/sh
 echo "Adding custom menu entries." >&2
 exec tail -n +3 $0
 # This file provides an easy way to add custom menu entries.  Simply type the
 # menu entries you want to add after this comment.  Be careful not to change
 # the 'exec tail' line above.
 
 menuentry "Reboot System" {
 reboot
 }
 
 menuentry "Halt System" {
 halt
 }

To take effect the changes you have to run the command ''update-grub'' as root.