Understanding Linux kernel Versioning

The main Linux kernel versions comes from the Linux Torvald who is author of Linux kernel, from his git at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ , we can clone this kernel as,

 $ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 

First 5 lines from the top level Makefile in Linux kernel contains information/variables about the Linux kernel versions.

 vim linux/Makefile 

VERSION = 4
PATCHLEVEL = 9
SUBLEVEL = 45
EXTRAVERSION =
NAME = Roaring Lionus

In Above, first number “VERSION” denotes the kernel version, “PATCHLEVEL” denotes major revision, “SUBLEVEL” denotes minor revision of Linux kernel.

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All the latest changes happened in most recent kernel version can be found at https://kernelnewbies.org/LinuxChanges whereas if we want to see what are the changes in 4.9 kernel as compared to 4.8 kernel can be seen at https://kernelnewbies.org/Linux_4.9

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