worker - Worker runs your Travis CI jobs
Worker is the component of Travis CI that will run a CI job on some form of compute instance. It's responsible for getting the bash script from travis-build, spin up the compute instance (VM, Docker container, or maybe something different), upload the bash script, run it and stream the logs back to travis-logs. It also sends state updates to travis-hub.Find the version you wish to install on the GitHub Releases page and download either the darwin-amd64 binary for OS X or the linux-amd64 binary for Linux. No other operating systems or architectures have pre-built binaries at this time.