# Enabling or Adding a Software Repository

This section explains how to enable or add a software repository in CentOS, SUSE, and Ubuntu.

#### CentOS

1. Run the following command to check whether a software repository has been enabled.

   yum repolist all

   If status is disabled, as shown in Figure 1, no software repository has been enabled. Proceed to the next step.

   Figure 1 Checking software repositories
2. Run the following command to enable a software repository. This step uses Public-OTC-CentOS-7-Base as an example.

   yum-config-manager --enable Public-OTC-CentOS-7-Base

   Figure 2 Enabling a software repository
3. Run the following command to check whether the software repository described in step 2 has been enabled.

   yum repolist all

   If status is enabled, as shown in Figure 3, the software repository has been enabled.
   Figure 3 Checking whether the software repository has been enabled

#### SUSE

1. Run the following command to check whether a software repository has been enabled.

   zypper lr

   If no software repository is detected, as shown in Figure 4, proceed to the next step.

   Figure 4 Checking software repositories
2. Run the following command to add a software repository. This step uses opensuse12.2 as an example.

   zypper addrepo http://download.opensuse.org/distribution/12.2/repo/oss/ opensuse-main
   Figure 5 Adding a software repository
3. Run the following command to update and add software repositories.

   zypper refresh

   Figure 6 Updating and adding repositories
4. Run the following command to check whether the software repository described in step 2 has been enabled.

   zypper lr

   If Enabled is Yes, as shown in Figure 7, the software repository has been enabled.
   Figure 7 Checking whether the software repository has been enabled

#### Ubuntu

1. Run the following command to add a software repository.

   apt-add-repository http://archive.canonical.com/ubuntu
   Figure 8 Adding a software repository
2. Run the following command to update and add software repositories.

   apt-get update

   Figure 9 Updating and adding repositories

Parent topic: Getting Started