diff --git a/sources/tech/20170120 How to Install Elastic Stack on CentOS 7.md b/sources/tech/20170120 How to Install Elastic Stack on CentOS 7.md
index 89704e593d..428ddacec5 100644
--- a/sources/tech/20170120 How to Install Elastic Stack on CentOS 7.md	
+++ b/sources/tech/20170120 How to Install Elastic Stack on CentOS 7.md	
@@ -1,3 +1,5 @@
+translating by Flowsnow!
+
 How to Install Elastic Stack on CentOS 7
 ============================================================
 
@@ -538,25 +540,25 @@ via: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-
 
 本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
 
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-[1]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-nbspprepare-the-operating-system
-[2]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-java
-[3]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-elasticsearch
-[4]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-kibana-with-nginx
-[5]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-logstash
-[6]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-filebeat-on-the-centos-client
-[7]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-filebeat-on-the-ubuntu-client
-[8]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-testing
-[9]:https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#reference
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+[1]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-nbspprepare-the-operating-system
+[2]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-java
+[3]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-elasticsearch
+[4]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-kibana-with-nginx
+[5]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-logstash
+[6]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-filebeat-on-the-centos-client
+[7]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-install-and-configure-filebeat-on-the-ubuntu-client
+[8]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#step-testing
+[9]: https://www.howtoforge.com/tutorial/how-to-install-elastic-stack-on-centos-7/#reference
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