How to make rpm auto install dependencies

The link @gertvdijk provided shows a quick way to achieve the desired results without configuring a local repository:

$ yum --nogpgcheck localinstall packagename.arch.rpm

Just change packagename.arch.rpm to the RPM filename you want to install.

Edit Just a clarification, this will automatically install all dependencies that are already available via system YUM repositories.

If you have dependencies satisfied by other RPMs that are not in the system's repositories, then this method will not work unless each RPM is also specified along with packagename.arch.rpm on the command line.

Create a (local) repository and use yum to have it resolve the dependencies for you.

The CentOS wiki has a nice page providing a how-to on this. CentOS wiki HowTos/CreateLocalRepos.

Summarized and further minimized (not ideal, but quickest):

1. Create a directory for you local repository, e.g. /home/user/repo.
2. Move the RPMs into that directory.

3. Fix some ownership and filesystem permissions:

   # chown -R root.root /home/user/repo

4. Install the createrepo package if not installed yet, and run

   # createrepo /home/user/repo# chmod -R o-w+r /home/user/repo

5. Create a repository configuration file, e.g. /etc/yum.repos.d/myrepo.repo containing

   [local]name=My Awesome Repobaseurl=file:///home/user/repoenabled=1gpgcheck=0

6. Install your package using

   # yum install packagename

For dnf users just use dnf install *.rpm, localinstall is no longer needed.