update-grub
Regenerate GRUB bootloader configuration
TLDR
This command is an alias for grub-mkconfig --output /boot/grub/grub.cfg.View documentation for the original command
$ tldr grub-mkconfig
SYNOPSIS
update-grub
DESCRIPTION
update-grub is a convenience wrapper that generates a new GRUB configuration file. It is equivalent to running grub-mkconfig -o /boot/grub/grub.cfg and is commonly found on Debian-based distributions.The command reads configuration from /etc/default/grub and scripts in /etc/grub.d/ to generate the bootloader configuration.
INSTALL
sudo apt install grub2-common
sudo dnf install grub2-common
sudo pacman -S grub
sudo apk add grub
sudo zypper install grub2-common
CAVEATS
Requires root privileges. The actual path may vary (/boot/grub2/grub.cfg on some systems). Always review changes to GRUB configuration carefully.
SEE ALSO
grub-mkconfig(8), grub-install(8)
