Linux Kernel Booting Parameters are passed to the kernel when the machine is booting. We can pass parameters to control disks, graphics cards, serial consoles.
Linux Kernel accepts parameters being passed to the kernel when the machine is booting. We can pass parameters to control disks, graphics cards, serial consoles, networking details and many other input / output options.
Table of Contents
Kernel Booting Parameters
Boot parameters can be configured on the GRUB menu or on /boot/grub/grub.cfg , these parameters are used to control and optimize peripherals functions on boot. Kernel can auto-detect information about most common peripherals.
Power Supply Parameters
Advanced Configuration and Power Interface
Boot Console Parameters
The Famous RDEV utility
The rdev command can configure:
- root file system device
- swap device
- RAM disk
- video mode
- root device permissions (readonly / readwrite)
Kernel Root FileSystem boot options
- root=
- rootflags=
- rootfstype=
- ro
- rw
- nfsroot=
- ip=
Kernel RAM Disk boot options
- ramdisk_start=
- load_ramdisk=
- prompt_ramdisk=
- ramdisk_size=
- ramdisk_blocksize=
- ramdisk=
- noinitrd
Kernel PCI BUS boot options
Kernel Video boot options
https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html