protoc-gen-go: program not found or is not executable
Please specify a program using absolute path or make sure the program is available in your PATH system variable
--go_out: protoc-gen-go: Plugin failed with status code 1.
經過網上各種環境變量設定，還是依然報錯。
最後的解決辦法是将GOPath/bin目錄下的protoc-gen-go檔案拷貝至/bin目錄下
sudo cp /home/test/go/bin/protoc-gen-go /bin
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