To install a package in CentOS GNU/Linux use yum command.

For example to install Midnight Commander use:
   yum install mc

If we want to have rpm package management support we will install rpm with:
  yum install rpm

If we want to list all available to install packages (that can be installed but are not) on our system:
  yum list | less

To see installed packages on our system:
  yum list installed

Search for a package that contains mysql name:

  yum search mysql

If we want which package provides a file we can use (next example shows to which package belongs /usr/bin/mc file):

  yum provides /usr/bin/mc
or:
  yum provides */mc


Other package management commands
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To check to which pachage a binary app belongs to we use:
  rpm -qf /sbin/mke2fs
We will get:
  e2fsprogs-1.41.12-3.el6.x86_64