diff --git a/main.go b/main.go
index 4ad1421..62e5f60 100644
--- a/main.go
+++ b/main.go
@@ -9,7 +9,6 @@ import (
 	"os/exec"
 	"path"
 	"path/filepath"
-	"strings"
 	"time"
 )
 
@@ -26,18 +25,10 @@ func init() {
 		log.Ldate|log.Ltime)
 }
 
-func getEnv(key, def string) string {
-	var value, exists = os.LookupEnv(key)
-	if exists {
-		return value
-	}
-	return def
-}
-
 var ROOT string
 
 func main() {
-	scanIntervalF := flag.String("scaninterval", "1m", "scan interval")
+	scanIntervalF := flag.String("interval", "2s", "scan interval")
 	flag.Parse()
 	log.SetFlags(log.Lmicroseconds)