Tern is a VMware-originated open source tool that inspects container images to find individual software packages and their metadata installed in the image.
Due to changes in the command line options, Tern version 1.0.0 is the first non-backwards compatible release. If you have been using previous versions of Tern, we recommend that you upgrade to the latest release. You can run Tern by installing it from PyPI or you can clone the project from GitHub and install the project after cloning it.
[Source: Blog post by VMware Open Source Engineer Rose Judge at linuxfoundation.org]