diff --git a/misc/cpnetools.sh b/misc/cpnetools.sh
index a6662c60..ce2249e2 100644
--- a/misc/cpnetools.sh
+++ b/misc/cpnetools.sh
@@ -3,7 +3,7 @@
 tooldir=/usr/local/bin
 toollist="zip unzip"
 
-#分发到各个节点,这里分发到nehosts文件中的主机中.
+# distribute to hosts in file nehosts 
 while read line
   do
     if [[ "$line" =~ ^[^[:space:]]*# || -z "$line" ]]; then
diff --git a/misc/cpsshkey.sh b/misc/cpsshkey.sh
index 8aa933d0..3f0d5a3b 100644
--- a/misc/cpsshkey.sh
+++ b/misc/cpsshkey.sh
@@ -1,29 +1,36 @@
 #!/bin/bash
 
-# 判断id_rsa密钥文件是否存在
+# if exist id_rsa
 if [ ! -f ~/.ssh/id_rsa ];then
   ssh-keygen -t rsa -P "" -f ~/.ssh/id_rsa
 else
   echo "id_rsa has created ..."
 fi
 
-#分发到各个节点,这里分发到nehosts文件中的主机中.
+# distribute to hosts in file nehosts 
 while read line
   do
+    # ignore comment or null line
     if [[ "$line" =~ ^[^[:space:]]*# || -z "$line" ]]; then
       continue
-    fi  
-    user=`echo $line | cut -d " " -f 2`
+    fi
+
     ip=`echo $line | cut -d " " -f 1`
+    user=`echo $line | cut -d " " -f 2`
     passwd=`echo $line | cut -d " " -f 3`
-    
+
+    # !!! to remove ~/.ssh, all old authorized key will be lost
     expect <<EOF
       set timeout 10
-      spawn ssh-copy-id -f $user@$ip
+      spawn ssh $user@$ip "sudo rm -r ~/.ssh"
       expect {
         "yes/no" { send "yes\n";exp_continue }
-        "password" { send "$passwd\n" }
+        "password:" { send "$passwd\n" }
       }
-      expect "password" { send "$passwd\n" }
+      spawn ssh-copy-id -f $user@$ip
+      expect {
+        "password:" { send "$passwd\n" }
+      }
+      expect eof
 EOF
   done <  nehosts