rancherOS/docs/os/configuration/adding-kernel-parameters/index.md

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title: Adding kernel parameters layout: os-default

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Kernel parameters

There are two ways to edit the kernel parameters, in-place (editing the file and reboot) or during installation to disk.

In-place editing

For in-place editing, you will need to run a container with an editor and a mount to access the /boot/global.cfg file containing the kernel parameters.

To activate this setting, you will need to reboot.

$ sudo system-docker run --rm -it -v /:/host alpine vi /host/boot/global.cfg

During installation

If you want to set the extra kernel parameters when you are Installing RancherOS to Disk please use the --append parameter.

$ sudo ros install -d /dev/sda --append "rancheros.autologin=tty1"