diff --git a/xml/interface.xml b/xml/interface.xml
index f2f865b..70f9c29 100644
--- a/xml/interface.xml
+++ b/xml/interface.xml
@@ -4,14 +4,14 @@
 <!--
         column 0            column 1            column 2
        ____________________________________________________________
-row 0 | logo		    step_name			version    |
+row 0 | logo               step_name                   version     |
 row 1 |____________________________________________________________|
 row 2 | __________                                                 |
       ||          |                                                |
       || text     |                                                |
       ||__________|                                                |
-row 3 | 		 copyright information	    		   |
-row 4 | quit	    	      			 previous  next    |
+row 3 |     copyright information                                  |
+row 4 | quit               previous                        next    |
       |____________________________________________________________|
 -->
   <widget type='Frame' name='main'>
@@ -60,7 +60,7 @@ row 4 | quit	    	      			 previous  next    |
     </widget>
 
     <widget type='Button'>
-      <widget_attribute	text='previous' command='previous'/>
+      <widget_attribute text='previous' command='previous'/>
       <grid_location row='4' column='1'/>
     </widget>
 
@@ -111,15 +111,15 @@ row 4 |                                                            |
     <widget type='Frame'>
       <grid_location row='0' column='0'/>
       <widget type='Label'>
-	    <widget_attribute text='serial number'/>
-	    <grid_location row='0' column='0' sticky='W'/>
+      <widget_attribute text='serial number'/>
+      <grid_location row='0' column='0' sticky='W'/>
     </widget>
 
     <widget type='Entry'>
-	    <widget_attribute width='12' textvariable='serial_no.number'/>
-	    <grid_location row='1' column='0' sticky='W'/>
-	    <variable name='serial_no.number' type='StringVar' value=''/>
-	    <action init='serial_no_init' quit='serial_no_quit'/>
+      <widget_attribute width='12' textvariable='serial_no.number'/>
+      <grid_location row='1' column='0' sticky='W'/>
+      <variable name='serial_no.number' type='StringVar' value=''/>
+      <action init='serial_no_init' quit='serial_no_quit'/>
     </widget>
   </widget>
 </widget>
@@ -165,53 +165,53 @@ row 4 |                                                            |
     <widget type='Frame'>
       <grid_location row='0' column='0' sticky='WS' pady='10'/>
       <widget type='Label'>
-	    <widget_attribute text='device'/>
-	    <grid_location row='0' column='0' />
+      <widget_attribute text='device'/>
+      <grid_location row='0' column='0'/>
     </widget>
 
     <widget type='Listbox'>
-	    <widget_attribute width='20' height='10'/>
-	    <grid_location row='0' column='1' padx='10'/>
+      <widget_attribute width='20' height='10'/>
+      <grid_location row='0' column='1' padx='10'/>
     </widget>
   </widget>
-	
+
   <widget type='Frame'>
     <grid_management rows='2' columns='5'>
-	    <configure column='3' weight='1'/>
+      <configure column='3' weight='1'/>
     </grid_management>
     <grid_location row='1' column='0' sticky='NW'/>
     <action>
-	      <scroll scrolling='partition.scroll' scrolled='partition.list'/>
+      <scroll scrolling='partition.scroll' scrolled='partition.list'/>
     </action>
 
     <widget type='Listbox' name='partition.list'>
-	    <widget_attribute width='60'/>
-	    <grid_location row='0' column='0' columnspan='4' sticky='NWS' pady='10'/>
+      <widget_attribute width='60'/>
+      <grid_location row='0' column='0' columnspan='4' sticky='NWS' pady='10'/>
     </widget>
 
     <widget type='Scrollbar' name='partition.scroll'>
-	    <widget_attribute orient='vertical'/>
-	    <grid_location row='0' column='4' sticky='NS' pady='10'/>
+      <widget_attribute orient='vertical'/>
+      <grid_location row='0' column='4' sticky='NS' pady='10'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='new'/>
-	    <grid_location row='1' column='0' sticky='W'/>
+      <widget_attribute text='new'/>
+      <grid_location row='1' column='0' sticky='W'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='edit'/>
-	    <grid_location row='1' column='1' padx='10'/>
+      <widget_attribute text='edit'/>
+      <grid_location row='1' column='1' padx='10'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='delete'/>
-	    <grid_location row='1' column='2' padx='10'/>
+      <widget_attribute text='delete'/>
+      <grid_location row='1' column='2' padx='10'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='reset'/>
-	  <grid_location row='1' column='3' sticky='E'/>
+      <widget_attribute text='reset'/>
+      <grid_location row='1' column='3' sticky='E'/>
     </widget>
   </widget>
 </widget>
@@ -272,20 +272,20 @@ row 2 |           _______________    __________________                      |
       </action> 
       
     <widget type='Label'>
-	    <widget_attribute text='Raw'/>
-	    <grid_location row='0' column='0' sticky='W'/>
+      <widget_attribute text='Raw'/>
+      <grid_location row='0' column='0' sticky='W'/>
     </widget>
 
     <widget type='Listbox' name='raid_raw.list'>
-	    <widget_attribute listvariable='raid_raw_devs'/>
-	    <grid_location row='1' column='0' sticky='NWES'/>
-	    <variable name='raid_raw_devs' type='StringVar'/>
-	    <action init='raid_raw_init'/>
+      <widget_attribute listvariable='raid_raw_devs'/>
+      <grid_location row='1' column='0' sticky='NWES'/>
+      <variable name='raid_raw_devs' type='StringVar'/>
+      <action init='raid_raw_init'/>
     </widget>
 
     <widget type='Scrollbar' name='raid_raw.scroll'>
-	    <widget_attribute orient='vertical'/>
-	    <grid_location row='1' column='1' sticky='NS'/>
+      <widget_attribute orient='vertical'/>
+      <grid_location row='1' column='1' sticky='NS'/>
     </widget>
   </widget>
 
@@ -299,24 +299,24 @@ row 2 |           _______________    __________________                      |
     <grid_location row='0' column='1' sticky='NWES'/>
 
     <widget type='Label'>
-	    <widget_attribute text='Active'/>
-	    <grid_location row='0' column='1' sticky='W'/>
+      <widget_attribute text='Active'/>
+      <grid_location row='0' column='1' sticky='W'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='-&gt;' command='raid_raw_to_active'/>
-	    <grid_location row='1' column='0' sticky='S'/>
+      <widget_attribute text='-&gt;' command='raid_raw_to_active'/>
+      <grid_location row='1' column='0' sticky='S'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='&lt;-' command='raid_active_to_raw'/>
-	    <grid_location row='2' column='0' sticky='N'/>
+      <widget_attribute text='&lt;-' command='raid_active_to_raw'/>
+      <grid_location row='2' column='0' sticky='N'/>
     </widget>
 
     <widget type='Listbox' name='raid_active.list'>
-	    <widget_attribute listvariable='raid_active_devs'/>
-	    <grid_location row='1' column='1' rowspan='2' sticky='NWES'/>
-	    <variable name='raid_active_devs' type='StringVar'/>
+      <widget_attribute listvariable='raid_active_devs'/>
+      <grid_location row='1' column='1' rowspan='2' sticky='NWES'/>
+      <variable name='raid_active_devs' type='StringVar'/>
     </widget>
   </widget>
 
@@ -330,24 +330,24 @@ row 2 |           _______________    __________________                      |
     <grid_location row='1' column='1' sticky='NWES'/>
 
     <widget type='Label'>
-    	<widget_attribute text='Spare'/>
-	    <grid_location row='0' column='1' sticky='W'/>
+      <widget_attribute text='Spare'/>
+      <grid_location row='0' column='1' sticky='W'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='-&gt;' command='raid_raw_to_spare'/>
-	    <grid_location row='1' column='0' sticky='S'/>
+      <widget_attribute text='-&gt;' command='raid_raw_to_spare'/>
+      <grid_location row='1' column='0' sticky='S'/>
     </widget>
 
     <widget type='Button'>
-	    <widget_attribute text='&lt;-' command='raid_spare_to_raw'/>
-	    <grid_location row='2' column='0' sticky='N'/>
+      <widget_attribute text='&lt;-' command='raid_spare_to_raw'/>
+      <grid_location row='2' column='0' sticky='N'/>
     </widget>
 
     <widget type='Listbox' name='raid_spare.list'>
-	    <widget_attribute listvariable='raid_spare_devs'/>
-	    <grid_location row='1' column='1' rowspan='2' sticky='NWES'/>
-	    <variable name='raid_spare_devs' type='StringVar'/>
+      <widget_attribute listvariable='raid_spare_devs'/>
+      <grid_location row='1' column='1' rowspan='2' sticky='NWES'/>
+      <variable name='raid_spare_devs' type='StringVar'/>
     </widget>
   </widget>
 
@@ -356,31 +356,31 @@ row 2 |           _______________    __________________                      |
     <grid_location row='2' column='1' />
     <variable name='raid_level' type='StringVar'/>
     <widget type='Label'>
-	    <widget_attribute text='Level'/>
-	    <grid_location row='0' column='0' sticky='W'/>
+      <widget_attribute text='Level'/>
+      <grid_location row='0' column='0' sticky='W'/>
     </widget>
     <widget type='Radiobutton' name='raid_level_0'>
-	    <widget_attribute text='Raid 0' variable='raid_level' value='0'/>
-	    <grid_location row='1' column='0'/>
+      <widget_attribute text='Raid 0' variable='raid_level' value='0'/>
+      <grid_location row='1' column='0'/>
     </widget>
 
     <widget type='Radiobutton' name='raid_level_1'>
-	    <widget_attribute text='Raid 1' variable='raid_level' value='1'/>
-	    <grid_location row='2' column='0'/>
+      <widget_attribute text='Raid 1' variable='raid_level' value='1'/>
+      <grid_location row='2' column='0'/>
     </widget>
 
     <widget type='Radiobutton' name='raid_level_5'>
-	    <widget_attribute text='Raid 5' variable='raid_level' value='5'/>
-	    <grid_location row='3' column='0'/>
+      <widget_attribute text='Raid 5' variable='raid_level' value='5'/>
+      <grid_location row='3' column='0'/>
     </widget>
   </widget>
 
   <!-- raid partitions -->
   <widget type='Frame'>
     <grid_management rows='3' columns='2'>
-	  <configure row='1' weight='1'/>
-	  <configure row='2' weight='1'/>
-	  <configure column='1' weight='1'/>
+    <configure row='1' weight='1'/>
+    <configure row='2' weight='1'/>
+    <configure column='1' weight='1'/>
     </grid_management>
 
     <grid_location row='0' column='2' rowspan='2'/>
@@ -469,14 +469,14 @@ row 4 |                                                            |
 
     <widget type='Frame'>
       <grid_management rows='2' columns='2'>
-	      <configure row='0' weight='1'/>
+        <configure row='0' weight='1'/>
         <configure column='0' weight='1'/>
       </grid_management>
       <grid_location row='0' column='0' columnspan='2' padx='20' pady='20' sticky='NSWE'/>
 
       <action>
-	      <scroll scrolling='mount.scroll.v' scrolled='mount.list'/>
-	      <scroll scrolling='mount.scroll.h' scrolled='mount.list'/>
+        <scroll scrolling='mount.scroll.v' scrolled='mount.list'/>
+        <scroll scrolling='mount.scroll.h' scrolled='mount.list'/>
       </action>
 
       <widget type='Listbox' name='mount.list'>
@@ -526,8 +526,8 @@ row 4 |                                                            |
       <variable name='network_config_method' type='StringVar'/>
 
       <widget type='Label'>
-	      <widget_attribute text='host name'/>
-	      <grid_location row='0' column='0' sticky='W'/>
+        <widget_attribute text='host name'/>
+        <grid_location row='0' column='0' sticky='W'/>
       </widget>
       <widget type='Entry'>
         <widget_attribute width='12' textvariable='network_host_name'/>
@@ -896,7 +896,7 @@ row 4 |                                                            |
     <Chinese>北京凝思科技有限公司 版权所有</Chinese>
   </text>
 
-	<text key='#dependency.help'>
+  <text key='#dependency.help'>
     <English>
     There are two kinds of dependent relationships. Dependent Functions and Dependent Packages.
     Dependent Functions ：To provide systems function of packages. the left column is the systematic functions, the right column provides function of packages.
@@ -913,8 +913,8 @@ row 4 |                                                            |
     <English>You have already been in the first step.</English>
     <Chinese>您已到达第一步。</Chinese>
   </text>
-	
-	<text key='#prepar_installation.help'>
+
+  <text key='#prepar_installation.help'>
     <English>
     Installation information recorded the configuration the user chose during the installation, including the operation to the physical hard disks, the software packages chose to install, the selected self-starting servers since system startup, etc. 
     </English>
@@ -928,7 +928,7 @@ row 4 |                                                            |
     <Chinese>您已到达最后一步。</Chinese>
   </text>
 
-	<text key='#mount.help'>
+  <text key='#mount.help'>
     <English>
     There are five columns in the mount point display frame. The first column lists the hard disk partitions, such as sdaX, mdx. The second lists the mount points. The third lists the file system type of the partitions. The fourth lists the choices whether to format the partitions, "yes" means do , "no" means don't . The fifth lists the sizes of the partitions or the raid devices. 
     Click one row to change configurations of the hard disk partition, including the mount point, whether to format the partition, the file system type, etc.
@@ -1009,7 +1009,7 @@ row 4 |                                                            |
     原始框中是满足制作RAID的硬盘分区,如sda1、sdb2等。设备框中是原本系统已经制作好的RAID,如md0、md1等。系装安装时将保留原有的RAID设备。若要制作新RAID,请在原始框中选中硬盘分区后通过点击"－>",硬盘分区会进入使用框或备用框中。要制作RAID，使用框中必须要有硬盘分区，可以有一个或多个。备用框中硬盘分区是可选的，可以有一个或多个,也可以没有。完成上步操作后在级别框中选择raid的级别，最后点击"->"在设备框中产生新的mdX设备。
     </Chinese>
   </text>
-	
+
   <text key='#serial number.help'>
     <English>
     Serial number is the permission to run secure functions of Linx Rocky Secure OS.
@@ -1018,8 +1018,8 @@ row 4 |                                                            |
     Website: www.linx-info.com
     </English>
     <Chinese>    
-    安装序列号是计算机运行凝思磐石安全操作系统的许可，请在序列号框内输入正确的序列号，以便操作系统的安全功能,能从计算机启动。
-    如何获取安装序列号请联系北京凝思科技有限公司。
+    安装序列号是计算机运行凝思磐石安全操作系统的许可,请在序列号框内输入正确的序列号,以便操作系统的安全功能,能从计算机启动.
+    如何获取安装序列号请联系北京凝思科技有限公司.
     网站：www.linx-info.com
     </Chinese>
   </text>
@@ -1065,9 +1065,9 @@ row 4 |                                                            |
   </text>
 
   <text key='#Welcome.help'>
-		<English>
+    <English>
     Dear user, welcome to Linx Rocky Secure OS!
-		</English>
+    </English>
     <Chinese>
     尊敬的用户，你好！欢迎使用凝思磐石操作系统。
     </Chinese>
@@ -1147,10 +1147,10 @@ row 4 |                                                            |
     <English>host name</English>
     <Chinese>主机名</Chinese>
   </text>
-	
+
   <text>
-		<English>prepar_installation</English>
-		<Chinese>安装信息</Chinese>
+    <English>prepar_installation</English>
+    <Chinese>安装信息</Chinese>
   </text>
 
   <text>