When you are updating all the packages, but do not want to update some packages, that can be added as following in "/etc/yum.conf"
Under the plugins , add as
=-=-=-
exclude=<pkg name>* <pkg name>*
eg : - exclude=php* kernel*
=-=-=-
Now execute yum update, you could see that php and kernel will not be see asking for update.
Under the plugins , add as
=-=-=-
exclude=<pkg name>* <pkg name>*
eg : - exclude=php* kernel*
=-=-=-
Now execute yum update, you could see that php and kernel will not be see asking for update.