linux 下环境变量
1. GOROOT export GOROOT=/usr/local/go
2. GOPATH export GOPATH=~/golib:~/goproject
3. GOBIN export GOBIN=/gobin
4. PATH export PATH=$PATH:$GOROOT/bin:$GOBIN
验证 shell : go version
1. GOROOT export GOROOT=/usr/local/go
2. GOPATH export GOPATH=~/golib:~/goproject
3. GOBIN export GOBIN=/gobin
4. PATH export PATH=$PATH:$GOROOT/bin:$GOBIN
验证 shell : go version
2020-01-14