diff --git a/lib/server/socket.js b/lib/server/socket.js
index 58c54603..b28aa874 100644
--- a/lib/server/socket.js
+++ b/lib/server/socket.js
@@ -11,6 +11,7 @@
         exec            = main.child_process.exec,
         Util            = main.util,
         mainpackage     = main.mainpackage,
+        equalPart       = Util.isContainStrAtBegin,
         CLOUDCMD        = mainpackage.name,
         ClientFuncs     = [],
         OnMessageFuncs  = [],
@@ -126,9 +127,9 @@
             connName = '#' + pConnNum + ': ';
             Util.log(connName + pCommand);
             
-            if (Util.isContainStrAtBegin(pCommand, CLOUDCMD)) 
+            if (equalPart(pCommand, CLOUDCMD)) 
                 lRet = onCloudCmd(pCommand);
-            else if( Util.isContainStrAtBegin(pCommand, 'cd ') ) 
+            else if (equalPart(pCommand, 'cd ')) 
                 lRet = onCD(pCommand);
                 
             if (lRet)
@@ -236,10 +237,10 @@
         
         pCommand = Util.removeStr(pCommand, CLOUDCMD);
         
-        if( Util.isContainStrAtBegin(pCommand, ' ') ) {
+        if (equalPart(pCommand, ' ')) {
             pCommand = Util.removeStr(pCommand, ' ');
             
-            if( Util.isContainStrAtBegin(pCommand, 'update') && update ) {
+            if (equalPart(pCommand, 'update') && update) {
                 update.get();
                 lRet = {
                     stdout: Util.addNewLine('update: ok')