Yum
How to get complete dependencies list of rpm ?
To find or get complete dependencies list of rpm you can use rpm, yum and repoquery command for both installed and non installed package
How to download rpm package and all dependencies (RHEL / CentOS 7)
Download rpm package and all dependencies in CentOS / RHEL 7 using yumdownloader or repotrack. You can also use repoquery with yumdownloader to download rpm
How to download entire repository from CentOS /RHEL 7/8 for offline use?
To download entire repository from CentOS / RHEL 7 you will need one time access to Internet. Next you can sync the online repository to your local system