去不跑世界你好例子

Question

I am installing go in Ubuntu 14.04 and believe I have my GOPATH$ set right and can't seem to run this go install hello.go file. I got rid of any path errors that I encountered first, but I still am not seeing a successful run

Go is installed in /etc/go

$ go env
GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/etc/go/packages"
GORACE=""
GOROOT="/etc/go"
GOTOOLDIR="/etc/go/pkg/tool/linux_amd64"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"

And here I made the file, edited via nano to copy the hello world example, but when I run it, nothing happens...

$ mkdir -p $GOPATH/src/github.com/hackg
$ nano $GOPATH/src/github.com/hackg/hello/hello.go
$ go install github.com/hackg/hello
$

QUESTION - it is supposed to display hello world there, proving Go is building files properly, but all I get is a fresh terminal prompt ready for a new command, no HELLO WORLD

I tried looking at other stackoverflow posts with no luck - ex Go, Golang : does not make sense that I have to have files before import

Answer 1

No, that command won't run your program; go install just made a binary you can run with $GOPATH/bin/hello. You can add to your ~/.bashrc or equivalent the line export PATH=$GOPATH/bin:$PATH, and open a new shell (like by closing and reopening your terminal program), so you can call it with just hello. go running the file would compile and run, but it's reasonable to start with go install because that's what you're going to use for "real" programs as opposed to quick tests.

(Sounds like you're on the right track with a GOPATH and all, but for setting up a Go environment generally you might find this question helpful.)