Index: nutchez-0.2/src/test/duplicate_del
===================================================================
--- nutchez-0.2/src/test/duplicate_del	(revision 165)
+++ nutchez-0.2/src/test/duplicate_del	(revision 172)
@@ -11,5 +11,10 @@
 # Delete duplicating ip addresss in file
 IPs=$(cat $1 | grep -v 'ip6' | grep -v '#' | grep -v '^$' | awk '{print $1}')
-cp -f $1 ${1}.bak
+
+# 刪掉空白行
+sed -i '/^$/d' $1
+
+cp -f "$1" "${1}.old"
+#read -p "cp - f $1 ${1}.old ; $?"
 
 for ip_add in $(echo $IPs)
@@ -25,5 +30,4 @@
 done
   
-
 # Dlete duplicating hostname in file
 hostnames=$(cat $1 | grep -v ip6 | grep -v '#' | grep -v '^$' |awk '{print $2}')
@@ -40,2 +44,5 @@
     done                                                                                                                                                             
 done
+
+cp -f "$1" "${1}.bak"
+#read -p "cp -f $1 ${1}.bak ; $?"