Metasploit [7]: Modify Grub of Kali Linux

To reconfigure Kali Linux as a platform, in addition to updating the system yesterday, some additional configurations are required, such as configuring Grub in dual systems. You need to reconfigure Grub because after Kali is installed on the same hard disk of Windows, the default Grub startup Item is Kali, and the default time is 5 seconds, as a real machine, it often enters Kali in response.
Generally, the Grub configuration files are all configured to open the menu with the root permission under/boot/grub. the lst file mainly sets the Default and TimeOut parameters, but this file is not available in Kali by Default:

Therefore, we need to use another modification method. There are two ways:
1. Modify the/etc/default/grub file and set the preceding two parameters, for example, default = your system number (starting from 0) and TimeOut = 30 (seconds );
2. Modify the/boot/grub. cfg file to configure the above two options;
Here we use the first one. Modify the values of the two parameters. Of course, the Grub menu is very simple to modify. Other functions will be provided as needed in the subsequent use process:

Finally, remember to update grub for immediate effect: update-grub