logrus setoutput log to file, but Unable to view logs in real time through linux tail -f

[StandNorthStar]

I want to verify the logrus output log and view the log in real time through tail -f. But the resulting log file must be reopened to see the latest content.

I don't know why, can you give me some advice

logrus version: logrus v1.8.1 golang version: go1.16.6 --- test code start ---

func main() { logger.SetFormatter(&logrus.TextFormatter{TimestampFormat: "2006-01-02 15:04:05", DisableColors: true}) logger.Level = logrus.TraceLevel logger.ReportCaller = true

file, _ = os.OpenFile("./test.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
logger.SetOutput(io.MultiWriter(file))

for i:=1; i<10;i++ {
    fmt.Println("start :", i)
    logger.Info(fmt.Sprintf("mine: %d", i))
    time.Sleep(time.Second * 5)
}

} --- test code end ---

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