diff --git a/shell/savePid b/shell/savePid
index 5ecb1f3..f2b4af4 100644
--- a/shell/savePid
+++ b/shell/savePid
@@ -4,14 +4,13 @@
 second=5s
 while true
   do
-    pid=`findPortPid $1`
-    if [ -z `echo $pid` ]
+    if [ -z "`findPortPid $1`" ]
     then
       echo "没有找到端口:$1的pid，$second后重试"
       sleep $second
     else
-      echo "端口:$1的pid：$pid"
-      echo $pid>run.pid
+      echo "端口:$1的pid：`findPortPid $1`"
+      echo `findPortPid $1`>run.pid
       break
     fi
   done