CentOS 6 reached its End of Life (EOL) on November 30, 2020. This means that it no longer receives official updates, including security patches, from the CentOS project.

However, the CentOS 6 Extended Lifecycle Support (ELS) is a subscription-based service offered by Red Hat that provides limited updates for critical and high-severity security vulnerabilities. This service is available for customers who need extra time to transition to newer operating systems.

Here are some key points about CentOS 6 ELS:

1. Eligibility:

   • ELS is available to customers with active Red Hat Enterprise Linux (RHEL) subscriptions. It's an add-on service for RHEL customers using CentOS.

2. Updates:

   • The ELS service provides critical and high-severity security patches, as well as select urgent priority bug fixes. It does not include updates for new features, non-urgent bug fixes, or other software enhancements.

3. Subscription Cost:

   • The cost of ELS depends on factors like the number of systems, the type of subscription, and the level of support required. You would need to contact Red Hat for specific pricing.

4. Transition to a Newer OS:

   • While ELS provides some additional support, it's important to plan and execute a transition to a supported operating system (such as CentOS 7 CentOS 8, or other alternatives) as soon as possible.

5. Availability of Packages:

   • ELS does not cover all packages in CentOS 6. It focuses on critical components like the kernel, glibc, OpenSSL, etc. Some packages may not receive updates.

6. Red Hat Satellite:

   • Organizations using Red Hat Satellite can use it to manage CentOS 6 systems under ELS.

Remember, using an EOL operating system can expose your system to security risks, so it's crucial to plan and execute a migration to a supported OS. Additionally, always consult with Red Hat or an experienced system administrator for the most up-to-date information and advice on CentOS 6 ELS.