Rebuilding reinstalling upgrading Go

1.6 ⇢ 1.9

• firstly get the location of Go (which go ⇒ /usr/local/go/bin/go)

• as outlined here, remove the existing Go (or if you like, keep it for posterity, or in case you need to roll back)

  sudo mv /usr/local/go/ /usr/local/go1.6/

• download the latest binary from golang.org

• sudo tar -C /usr/local -xzf Downloads/go1.9.2.linux-amd64.tar.gz

• to confirm, run go version ⇒ go version go1.9.2 linux/amd64