This Video is create for demonstration of different type OS Patching on Centos 7
1. How to patch the servers using iso image.
2. How to create remote repository using iso image.
3. How to patch the server using a remote repository and exclude the Apache package.
4. How to patch the server using the vendor repository and exclude the kernel package.
5. How to boot the server with an older kernel.
6. How to remove the old kernel.
For more details refer the below blogs.