diff --git a/xCAT-client/pods/man1/nodestat.1.pod b/xCAT-client/pods/man1/nodestat.1.pod
index 14519e857..f60de1bfd 100644
--- a/xCAT-client/pods/man1/nodestat.1.pod
+++ b/xCAT-client/pods/man1/nodestat.1.pod
@@ -40,9 +40,17 @@ Keywords to use:
     apps -- a list of comma separated application names whose status will be queried. For how to get the status of each app, look for app name in the key filed in a different row.
     port -- the application daemon port number, if not specified, use internal list, then /etc/services. 
     group -- the name of a node group that needs to get the application status from. If not specified, assume all the nodes in the nodelist table. To specify more than one groups, use group=a,group=b format.
-    cmd -- the command will be run locally on mn or sn.
-    dcmd -- the command will be run distributed on the nodes (xdsh <nodes> ...).
+    cmd -- the command that will be run locally on mn or sn.
+    lcmd -- the command that will be run the the mn only. 
+    dcmd -- the command that will be run distributed on the nodes using xdsh <nodes> ....
 
+For commands specified by 'cmd' and 'lcmd', the input of is a list of comma separated node names, the output must be in the following format:
+
+  node1:string1
+  node2:string2
+  ...
+
+For the command specified by 'dcmd', no input is needed, the output can be a string. 
 
 
 =head1 B<Options>
diff --git a/xCAT-client/share/doc/xCAT2-Monitoring.odt b/xCAT-client/share/doc/xCAT2-Monitoring.odt
index 96690fce5..4f3465999 100644
Binary files a/xCAT-client/share/doc/xCAT2-Monitoring.odt and b/xCAT-client/share/doc/xCAT2-Monitoring.odt differ
diff --git a/xCAT-client/share/doc/xCAT2-Monitoring.pdf b/xCAT-client/share/doc/xCAT2-Monitoring.pdf
index 16a83d27b..50fef2b4c 100644
Binary files a/xCAT-client/share/doc/xCAT2-Monitoring.pdf and b/xCAT-client/share/doc/xCAT2-Monitoring.pdf differ
diff --git a/xCAT-server/lib/xcat/monitoring/xcatmon.pm b/xCAT-server/lib/xcat/monitoring/xcatmon.pm
index a7cb7d335..0df9a34f9 100644
--- a/xCAT-server/lib/xcat/monitoring/xcatmon.pm
+++ b/xCAT-server/lib/xcat/monitoring/xcatmon.pm
@@ -424,7 +424,16 @@ sub getDescription {
     group -- the name of a node group that needs to get the application status from.
          If not specified, assume all the nodes in the nodelist table. 
          To specify more than one groups, use group=a,group=b format.
-    cmd -- the command will be run locally on mn or sn.
-    dcmd -- the command will be run distributed on the nodes (xdsh <nodes> ...).";
+    cmd -- the command that will be run locally on mn or sn.
+    lcmd -- the command that will be run locally on the mn only.
+    dcmd -- the command that will be run distributed on the nodes using xdsh.
+
+       For commands specified by 'cmd' and 'lcmd', the input of is a list of comma 
+       separated node names, the output must be in the following format:
+         node1:string1
+         node2:string2
+         ...
+       For the command specified by 'dcmd', no input is needed, the output can be a 
+       string.";
 
 }