Which is the Menu Configuration file in GRUB 2?
The GRUB 2 menu configuration file ( grub.cfg) includes section remarks showing which script is responsible for creating the section. The /etc/default/grub file contains most of the user-defined variables such as display time, menu resolution and default menuentry.
How does the Exec tail trick work in Debian?
The scripts could use any logic they need to produce the output, but the exec tail trick allows to just dump some fixed lines in the output without changing the logic the script is started with. In addition to that magic incantation, Debian’s /etc/grub.d/40_custom also includes a comment telling the user to
Which is the default text editor for GRUB 2?
The file is a simple text file and can be edited by any text editor. In Ubuntu the default text mode editor is nano and the graphical mode editor is gedit, and the file can be edited with one of the following commands. The “&” allows the terminal to be used to update GRUB 2 once the user saves the file.
What are the variables in the Grub file?
The /etc/default/grub file contains most of the user-defined variables such as display time, menu resolution and default menuentry. Most custom menu users will want to allow these components to continue to operate normally.
How to create custom menus in grub.cfg?
The current 40_custom file contains only lines which are not actually imported into grub.cfg. In general, users should honor the comments and leave these lines alone, adding custom entries below the existing lines. The surest way to build a custom menu is to copy one or more working menuentries from the grub.cfg file.
Which is the best program to generate grub.cfg files?
The program grub-mkconfig (see Invoking grub-mkconfig) generates grub.cfg files suitable for most cases. It is suitable for use when upgrading a distribution, and will discover available kernels and attempt to generate menu entries for them. grub-mkconfig does have some limitations.