The Linux kernel doesn't consider itself a process, therefore it has no process id.
It isn't. RTLinux is a separate microkernel that runs Linux as a process. The Linux kernel is essentially unmodified.
Linux is a monolithic kernel. Some operating systems with a microkernel use Linux as a process for providing drivers, but this is irrelevant to mainstream Linux.
ps top
Either type linux error codes in a web browser and have a look through the websites on the subject, or go into the file system. Follow this path: /user/include/asm-generic/errno.h and you will find a list of error codes there.
fork
With the top command.
Any Linux/Unix process that runs in the background is called a 'daemon' process. The word derives from the Greek meaning "worker".
init.Answer:'init' is always process ID 1.
Subject: Code Status: Expired.
Linux operating system does
There is no "the startup file" in Linux; depending on the type of system, there may not be any files at all. The Linux boot process has a number of steps, many of which are optional or have alternative implementations.