Hello, With kernel boot parameters I mean the arguments you give on the grub command line to the kernel. Just like "toram" which on some distros work and on many doesn't. I googled but only found webpages listing the possible boot parameters and maybe explaining what they do, but none where it was explained _how_ they work. Does a boot parameter make the kernel call a script? Does a boot parameter reference a function inside the kernel? If some distros seem to allow a specific boot parameter what did they do to their distros kernel to make this parameter work? And which module or which part of the kernel takes the boot parameters as input to do the appropriate things? For example: It seems that Centos (8) does not suppport "toram" (allowing to load the whole OS into RAM), at least on my machine. Okay, what should or can I do to get my (Centos) kernel to accept this? Writing a script? Patching something? (Maybe my questions are not really clear, just ask me, please.) Thanks.