Describe the process of loading the Linux operating system during computer startup.

The Linux boot process when starting a computer includes several stages:

1. BIOS/UEFI — when power is turned on, POST (Power-On Self Test) is performed, then BIOS or UEFI searches for a boot device.

2. Bootloader — for example, GRUB. It loads the Linux kernel into memory and transfers control to it.

3. Linux Kernel — initializes hardware, mounts the root filesystem, and starts the first process — usually init or systemd.

4. System Initialization — init or systemd starts services and daemons necessary for system operation, configures the network, and mounts additional filesystems.

5. User Session — after all services are started, a login prompt or graphical interface appears.

Thus, the boot process is a sequence from hardware testing to launching user processes.