GitHub-hosted runners are virtual machines provided to you that execute your workflows. These machines grant you administrative privileges regardless of the operating system you are running on. This includes using sudo without a password for Mac and Linux machines.
Runner Hardware
| CPU | RAM | Storage |
|---|---|---|
| 2 core | 7GB | 14GB SSD |
Runner Operating Systems
- Windows Server 2019
- Ubuntu 20.04
- Ubuntu 18.04
- Ubuntu 16.04
- macOS Catalina 10.15
Environment Variables
A wide range of environment variables are included in each runner. It is recommended to use these environment variables if possible for a more consistent experience.
These variables are available to every step in a workflow run and steps are capable of reading, creating, or modifying environment variables.