do not uninstall old when yum install new

[wuzhouhui <wuzhouhui14@xxxxxxxxxxxxxxxx>]

Hi,

I have a specific needs that requires yum do not to uninstall old
version when install new one. For example, I found that
    yum install kernel
will install new kernel, and old kernel will remained. But
    yum install <something-else>
will uninstall old version after install new one, how to disable it?

Thanks.
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
https://lists.centos.org/mailman/listinfo/centos