Customers using Red Hat Enterprise Linux (RHEL) 6 should upgrade the OS on Self-hosted agents

If you're using Red Hat Enterprise Linux (RHEL) 6, it's important to upgrade the OS on your self-hosted agents for security-related reasons. The current versions of the Azure Pipelines agent across all operating systems depend on .NET Core 3.1, but .NET Core 3.1 no longer ships updates for RHEL 6, rendering it susceptible to security vulnerabilities. The minor version of .NET Core 3.1 will be updated to remain current on other operating systems. For a more detailed understanding of why it is important to upgrade, check out this post on the Azure DevOps Blog.