codePost provisions a handful of various environment containers, depending on the testing use-case and requirements.
Custom environments are available. Here are the details for the standard test environments:
Trust, but Verify
To identify the details of the operating system your tests are being run on yourself, you can follow these instructions (video walkthrough here):
Create a new Unit Test (Bash)
Add this line to the test definition:
cat /etc/os-release
Click "Run"