CentOS 7 image naming conventions

Question

I'm looking at the following on CentOS 7:

boot$ ls
config-3.10.0-229.7.2.el7.x86_64
config-3.10.0-229.el7.x86_64
grub
grub2
initramfs-0-rescue-9fde7dd9a7884e1b8fdef68620955b36.img
initramfs-3.10.0-229.7.2.el7.x86_64.img
initramfs-3.10.0-229.el7.x86_64.img
initrd-plymouth.img
symvers-3.10.0-229.7.2.el7.x86_64.gz
symvers-3.10.0-229.el7.x86_64.gz
System.map-3.10.0-229.7.2.el7.x86_64
System.map-3.10.0-229.el7.x86_64
vmlinuz-0-rescue-9fde7dd9a7884e1b8fdef68620955b36
vmlinuz-3.10.0-229.7.2.el7.x86_64
vmlinuz-3.10.0-229.el7.x86_64

Are 3.10.0-229.7.2.el7.x86_64 and 3.10.0-229.el7.x86_64 different (the former has an extra 7.2 in the name)?

If they are the same, then what is the difference in the name?

If they are different, then what is the difference? And which one is newer?

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This is my first time on CentOS. I set up the machine so I could do a git clone and ensure a library build under it. I don't have altruistic intentions.

Answer 1

They're different and 7.2 is newer.

3.10.0-229.el7 is the original release, 3.10.0-229.7.2.el7 is security update/bug fixes.

Please refer to redhat's release note page:

kernel-3.10.0-229.1.2.el7 https://rhn.redhat.com/errata/RHSA-2015-0726.html

kernel-3.10.0-229.7.2.el7 https://rhn.redhat.com/errata/RHSA-2015-1137.html