diff --git a/sources/tech/20161130 Install Security Patches or Updates Automatically on CentOS and RHEL.md b/sources/tech/20161130 Install Security Patches or Updates Automatically on CentOS and RHEL.md
index 896296f0f5..c8f7a80a6c 100644
--- a/sources/tech/20161130 Install Security Patches or Updates Automatically on CentOS and RHEL.md	
+++ b/sources/tech/20161130 Install Security Patches or Updates Automatically on CentOS and RHEL.md	
@@ -1,24 +1,26 @@
-ucasFL translating
 Install Security Patches or Updates Automatically on CentOS and RHEL
+在 CentOS 和 RHEL 上安装或自动更新安全补丁
 ============================================================
 
 One of the serious needs of a Linux system is to be kept up to date regularly with the latest security patches or updates available for the corresponding distribution.
-
+在 Linux 系统上，其中一个最重要的需求就是保持定期更新最新的安全补丁，或者为相应的 Linux 版本更新可用的安全补丁。
 In a previous article, we’ve explained how to [configure automatic security update in Debian/Ubuntu][1], in this article we will explain how to set up your CentOS/RHEL 7/6 distribution to auto update essential security packages when needed.
-
+在之前的文章中，我们分享了[如何在 Debian/Ubuntu 上配置和自动更新安全补丁][1]，在这篇文章中，我们将分享如何在 CentOS/RHEL 7/6 版本中设置自动更新重要的安全补丁，当你需要这样做的时候。
 Other Linux distributions in the same families (Fedora or Scientific Linux) can be configured similarly.
-
+在相同家族的其他 Linux 版本（Fedora 或 Scientific Linux）中可以用类似的方法进行配置。
 ### Configure Automatic Security Updates on CentOS/RHEL Systems
-
+### 在 CentOS/RHEL 系统上配置自动更新安全补丁
 On CentOS/RHEL 7/6, you will need to install the following package:
-
+在 CentOS/RHEL 7/6 系统上，你需要安装下面的安装包：
 ```
 # yum update -y && yum install yum-cron -y
 ```
 
 #### Enable Automatic Security Updates on CentOS/RHEL 7
 
+#### 在 CentOS/RHEL 7　系统上启用自动更新安全补丁
 Once the installation is complete, open /etc/yum/yum-cron.conf and locate these lines – you will have to make sure that the values matches those listed here:
+安装完成以后，打开 /etc/yum/yum-cron.conf，然后找到下面这些行内容，你必须确保它们的值和下面展示的一样
 
 ```
 update_cmd = security
@@ -28,6 +30,7 @@ apply_updates = yes
 ```
 
 The first line indicates that the unattended update command will be:
+第一行表明自动更新命令行应该是这样：
 
 ```
 # yum --security upgrade