HOW TO CREATE A LOCAL YUM REPOSITORY CONTAINING MANUALLY DOWNLOADED RPM PACKAGES
You can create your own yum repository containing only the packages you need.
HOW TO ENABLE PACKAGE CACHING FOR YUM
By modifying the yum configuration file, you can instruct the yum to save downloaded RPM packages to any local directory.
CREATING A LOCAL YUM REPOSITORY USING AN ISO IMAGE
How to set up yum repository to use locally-mounted DVD with Red Hat Enterprise Linux (RHEL/OEL/Centos)
HOW TO USE YUM TO DOWNLOAD A PACKAGE WITHOUT INSTALLING IT
Sometimes you may need to download RPM packages without installing them. It could become too challenging and time-consuming for manual downloading if multiple dependencies of the RPM packages exist.