YUM is a package manager for rpm-based distributions. Just like apt-get for Debian, YUM makes package installations and updates much simpler by automatically taking care of dependencies.

Go to this link if, for some reason, you want to go straight to the repository and download the rpms by hand.

How to Use Yum

• Download YUM for Fedora Core 1, FC 2, or FC 3.
  
• Install YUM by running the command:

  # rpm -i yum-version-number.rpm

• For Fedora Core, edit /etc/yum.conf as follows:
  
  [base]
  name=Fedora Core $releasever - $basearch - Base
  baseurl=http://mirrors.ateneo.net/distro/yum/Fedora/Core/$releasever/base/
  
  [updates-released]
  name=Fedora Core $releasever - $basearch - Released Updates
  baseurl=http://mirrors.ateneo.net/distro/yum/Fedora/Core/$releasever/updates/
  
  For CentOS, edit /etc/yum.repos.d/CentOS-Base.repo as follows:
  
  [base]
  name=CentOS-$releasever - Base
  baseurl=http://mirrors.ateneo.net/distro/yum/centos/$releasever/os/$basearch/
  exactarch=1
  gpgcheck=1
  
  [update]
  name=CentOS-$releasever - Updates
  baseurl=http://mirrors.ateneo.net/distro/yum/centos/$releasever/os/$basearch/
  exactarch=1
  gpgcheck=1
   

• To update your Fedora Core installation just type in the command:

  # yum update

  To install or remove a package do the following:

  # yum install some-package.rpm
  # yum remove some-package.rpm

  You may also refer to the man pages for YUM. This is, likewise, a useful link.