Index: /nutchez-0.2/src/test/client_remove.sh
===================================================================
--- /nutchez-0.2/src/test/client_remove.sh	(revision 204)
+++ /nutchez-0.2/src/test/client_remove.sh	(revision 205)
@@ -63,5 +63,7 @@
   show_info "$edit_hosts_echo_1" # "修改/etc/hosts..."
   Line_NO=`cat /etc/hosts | grep -n $Master_IP_Address | sed 's/:.*//g'`
-  sed -i ''$Line_NO'd' /etc/hosts
+  if [[ $Line_NO -ge 1 ]]; then
+    sed -i ''$Line_NO'd' /etc/hosts
+  fi
   show_info "$edit_hosts_echo_2" # "完成修改/etc/hosts"
 }
Index: /nutchez-0.2/src/test/master_remove.sh
===================================================================
--- /nutchez-0.2/src/test/master_remove.sh	(revision 204)
+++ /nutchez-0.2/src/test/master_remove.sh	(revision 205)
@@ -65,10 +65,11 @@
 function edit_hosts () {
   show_info "$edit_hosts_echo_1" # "修改/etc/hosts..."
-  
   slaves_list=`cat $nutch_PATH'/nutch_nodes' | cut -d' ' -f1`
   for nutch_node in $slaves_list
   do
     Line_NO=`cat /etc/hosts | grep -n $nutch_node | sed 's/:.*//g'`
-    sed -i ''$Line_NO'd' /etc/hosts
+    if [[ $Line_NO -ge 1 ]]; then
+      sed -i ''$Line_NO'd' /etc/hosts
+    fi
   done
   show_info "$edit_hosts_echo_2" # "完成修改/etc/hosts"