Find out all the 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: