How do you enable the EPEL repository in CentOS?

To enable the EPEL (Extra Packages for Enterprise Linux) repository in CentOS, follow these steps:

1. **Update your system packages**:
 
   sudo yum update -y

2. **Install the EPEL repository package**:
   For CentOS 7:
 
   sudo yum install epel-release -y

   For CentOS 8, you may need to use the `dnf` package manager:
 
   sudo dnf install epel-release -y

3. **Verify that the EPEL repository is enabled**:
  
   sudo yum repolist
 
   You should see `epel` in the list of repositories.

Now you can install packages from the EPEL repository using `yum` or `dnf`.