Depending on the architecture and operating system, you may encounter different formats:
cat > /tmp/my_initramfs/init << 'EOF' #!/bin/sh mount -t proc none /proc mount -t sysfs none /sys echo "Hello from initramfs"
The typical boot sequence when using an initramfs: boot ramdisk
: The bootloader copies the kernel and the boot ramdisk into the system memory.
In the modern computing landscape, we often take the persistent storage of our operating system for granted. We turn on a PC, the hard drive spins up (or the SSD powers on), and the OS loads. However, there is a distinct and powerful method of operation where the operating system exists entirely within the volatile memory of the computer: the . Depending on the architecture and operating system, you
The system's bootloader (e.g., GRUB, LILO) loads the kernel and a boot ramdisk into memory.
The kernel itself can only directly mount a root file system if it has built-in drivers for the underlying storage hardware and file system. However, monolithic kernels with every possible driver are bloated and inflexible. Instead, modern kernels use . However, there is a distinct and powerful method
There are two primary flavors of this technique: