whatis kernel-parameters
Kernel Command Line
Also known as: kernel parameters, boot parameters, cmdline
Options passed to the kernel by the bootloader at boot, such as quiet, root=, or nomodeset, visible in /proc/cmdline.
What Is the Linux Kernel Command Line?
Kernel parameters change behavior before anything else runs: which root filesystem to mount, which drivers to disable, how verbose to be, or which CPU mitigations to apply.
Edit them for one boot by pressing e at the GRUB menu, or permanently via GRUB_CMDLINE_LINUX in /etc/default/grub. Runtime tunables that can change after boot live in sysctl instead.
Example
cat /proc/cmdlineLearn more about Kernel Command Line
- Kernel Command Line Parameters Explained How to read /proc/cmdline, set parameters temporarily from the GRUB menu, make them permanent, and the ones worth knowing for rescue and troubleshooting.
- GRUB Explained: Configuration, Kernel Parameters, and Repair GRUB is the last thing that runs before the kernel and the first thing to blame when a machine will not boot. Here is how its configuration actually works and why editing the generated file is the wrong move.