Tell about the process of initializing the Linux operating system: init process (PID 1), bootloader, and initramfs.

The Linux initialization process begins with the bootloader, which loads the kernel into memory and hands over control to it. The bootloader (for example, GRUB) is responsible for selecting the kernel and passing parameters.

After the kernel loads, initramfs is mounted — a temporary filesystem in memory containing a minimal set of drivers and utilities necessary for hardware initialization and mounting the root filesystem.

Then, the kernel starts the process with PID 1 — init (or systemd in modern systems). This process is responsible for further system initialization: starting services, mounting filesystems, configuring the network, and launching user sessions.

Thus, the sequence is:

1. The bootloader loads the kernel.
2. The kernel mounts initramfs and executes scripts to prepare the system.
3. init (PID 1) is launched, managing the startup of all other processes and services.