Differences between Linux kernel files

Article Title: differences between Linux kernel files. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

The original kernel file compiled by vmlinux is not compressed.

ZImage is a gzip compressed file in vmlinux.

BzImage bz indicates "big zImage", which is not compressed with bzip2. The difference between the two is that zImage decompress the kernel to the low-end memory (the first 640 K), and bzImage decompress the kernel to the high-end memory (more than 1 MB ). If the kernel is small, zImage or bzImage will be used. If the kernel is large, bzImage will be used.

UImageU-boot is a dedicated image file. It is added with a tag with a length of 0x40 before zImage.

Vmlinuz is a copy of bzImage/zImage file or a link to bzImage/zImage.

Initrd is short for "initial ramdisk. It is usually used to temporarily boot the hardware to the State where the actual kernel vmlinuz can take over and continue the boot.