You can add or remove software repositories from the command line using the subscription-manager tool as the root user. Using subscription-manager from the command line See Troubleshooting and FAQ for more information. If you don’t see any RHSCL repositories in the list, your subscription might not include it. Note: After clicking, it might take several seconds for the check mark to appear in the enabled column. If you are using a workstation version of Red Hat Enterprise Linux, the repositories will be named rhel-workstation-rhscl-7-rpms and rhel-7-workstation-optional-rpms (or rhel-desktop-rhscl-6-rpms and rhel-6-desktop-optional-rpms). In the list of repositories, check the Enabled column for rhel-server-rhscl-7-rpms and rhel-7-server-optional-rpms (or rhel-server-rhscl-6-rpms and rhel-6-server-optional-rpms). Select Repositories from the System menu of the subscription manager. Alternatively, you can start it from the command prompt by typing subscription-manager-gui. Start Red Hat Subscription Manager using the System Tools group of the Applications menu. Using the Red Hat Subscription Manager GUI

The remainder of this tutorial applies to systems running either RHSM or RHN Classic. The instructions in this section are only for systems using RHSM. Note for RHEL 6 users: If your system uses Red Hat Network (RHN) Classic instead of Red Hat Subscription Management (RHSM) for managing subscriptions and entitlements, please skip this step and follow the Installation chapter of the Red Hat Software Collections Release Notes.

Yum install docker oracle linux