How to find out all Kernel Boot Parameters
how to find out all the available kernel’s command-line parameters (kernel boot parameters)?
It locates in the following file of kernel source code package.
Documentation/admin-guide/kernel-parameters.txt
how to permanently add/change a kernel boot parameter?
Edit file /etc/default/grub
or /etc/default/grub.d/xxx.cfg
and add the parameter like that (replace aaa=bbb
into real parameter)
GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT aaa=bbb"
and update grub
sudo update-grub
sudo reboot
view present kernel boot parameter
cat /proc/cmdline
### or
dmesg | grep "Command line"
online ref:
https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html
https://www.kernel.org/doc/html/v4.19/admin-guide/kernel-parameters.html
https://www.kernel.org/doc/html/v5.10/admin-guide/kernel-parameters.html
Back to Table of Contents
Disclaimer
- License under
CC BY-NC 4.0
- Copyright issue feedback
me#imzye.com
, replace # with @ - Not all the commands and scripts are tested in production environment, use at your own risk
- No personal information is collected.
Feedback