package main import ( "fmt" "io/ioutil" "os" ) func main() { if len(os.Args) < 2 { fmt.Println("File name missing") return } if len(os.Args) > 2 { fmt.Println("Too many arguments") return } fileName := os.Args[1] data, err := ioutil.ReadFile(fileName) if err != nil { panic(err) } os.Stdout.Write(data) }