
To show the current version installed on our system we can do: If we now go to https:// we will see that the latest kernel version is 4.15 at the time of this writing (other versions are available from the same site).
Ext4 is the evolution of the most used Linux filesystem, Ext3.
In many ways, Ext4 is a deeper improvement over Ext3 than Ext3 was over Ext2.
This new Kernel 4.15 version is a long-term release and will be supported for 6 years, earlier all Linux Kernel versions were supported for 2 years only.
One important thing to consider is the life cycle of a kernel version – if the version you are currently using is approaching its end of life, no more bug fixes will be provided after that date. Most modern distributions provide a way to upgrade the kernel using a package management system such as yum and an officially-supported repository.