Linux command
grubby 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Example
sudo grubby --update-kernel=ALL --args 'quiet console=ttyS0'
Remove
sudo grubby --update-kernel=DEFAULT --remove-args quiet
List
sudo grubby --info=ALL
说明
grubby is a command-line tool for updating and modifying bootloader configuration on Red Hat-based systems. It works with GRUB, GRUB2, and zipl (for s390 systems), providing a unified interface for boot configuration changes. The tool modifies kernel command-line arguments, manages boot entries, and sets default kernels without directly editing configuration files. On modern Fedora/RHEL systems using GRUB2 with BLS (Boot Loader Specification), grubby modifies the individual kernel entry files in /boot/loader/entries/.
参数
- --info=_KERNEL_
- Display boot information for specified kernel (or ALL)
- --update-kernel=_KERNEL_
- Update specified kernel (ALL, DEFAULT, or path)
- --args=_ARGS_
- Add kernel arguments
- --remove-args=_ARGS_
- Remove kernel arguments
- --set-default=_KERNEL_
- Set default boot kernel
- --default-kernel
- Display path of default kernel
- --default-index
- Display index of default kernel
- --add-kernel=_PATH_
- Add a new kernel entry
- --remove-kernel=_PATH_
- Remove a kernel entry
- --title=_TITLE_
- Set title for new kernel entry
FAQ
What is the grubby command used for?
grubby is a command-line tool for updating and modifying bootloader configuration on Red Hat-based systems. It works with GRUB, GRUB2, and zipl (for s390 systems), providing a unified interface for boot configuration changes. The tool modifies kernel command-line arguments, manages boot entries, and sets default kernels without directly editing configuration files. On modern Fedora/RHEL systems using GRUB2 with BLS (Boot Loader Specification), grubby modifies the individual kernel entry files in /boot/loader/entries/.
How do I run a basic grubby example?
Run `sudo grubby --update-kernel=ALL --args 'quiet console=ttyS0'` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does --info=_KERNEL_ do in grubby?
Display boot information for specified kernel (or ALL)