- GOROOT - path tpo the installation of go
- PATH=$PATH;$GOROOT/bin - so the command line can find the go command
- GOPATH - where my libraries are going to be located
- GOPATH - can have multiple directories in in (but then we have to includ the bin directories related to them one-by-one)
- The first entry in GOPATH will be used by go get to install modules, but all the others will be used to find modules.