func (p *Provisioner) remoteCmd(cmd string) error { remoteCmd := &packer.RemoteCmd{ Command: cmd, Stdout: p.ui.Out, Stderr: p.ui.ErrorWriter(), Timeout: 10 * time.Minute, } p.AddRemoteCommand(remoteCmd) err := remoteCmd.Start() if err != nil { return err } p.ui.Message(fmt.Sprintf("Executed command %q", cmd)) // Wait for the command to exit status, err := remoteCmd.Wait() if err != nil { return err } // Set the exit status of the command remoteCmd.SetExited(status) // Handle the command's exit code if status != 0 { return fmt.Errorf("command %q exited with status %d", cmd, status) } return nil }This example demonstrates how to execute a remote command using Packer's RemoteCmd. It creates an instance of RemoteCmd with the command to execute, specifies the output streams and timeout, adds the command to the provisioning process, starts it, waits for it to exit, sets its exit status, and handles any errors. The SetExited() method is used to explicitly set the command's exit status.