Go exec.Command bash exit status 127

I've written a go function to execute commands using bash inside docker container from ubuntu 20.04.

func commandExecution(command string) (error, string, string) {
    var output bytes.Buffer
    var error bytes.Buffer

    cmd := exec.Command("bash", "-c", command)
    cmd.Stdout = &output
    cmd.Stderr = &error
    err := cmd.Run()

    return err, output.String(), error.String()
}

when I try to execute some commands like below

err, _, _ := commandExecution("sudo mkdir -p " + directory)

or

err, _, _ := commandExecution("sudo cp " + source + " " + destination)

I'm just getting the

error exit status 127

I tried executing again directly

 docker exec container bash -c mv --help

mv: missing file operand

Help me out!