diff --git a/sources/tech/20150730 Compare PDF Files on Ubuntu.md b/sources/tech/20150730 Compare PDF Files on Ubuntu.md
index 9612f0430e..6319508af5 100644
--- a/sources/tech/20150730 Compare PDF Files on Ubuntu.md	
+++ b/sources/tech/20150730 Compare PDF Files on Ubuntu.md	
@@ -1,3 +1,4 @@
+Translating by GOLinux!
 Compare PDF Files on Ubuntu
 ================================================================================
 If you want to compare PDF files you can use one of the following utility
@@ -44,4 +45,4 @@ via: http://www.ubuntugeek.com/compare-pdf-files-on-ubuntu.html
 
 本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
 
-[a]:http://www.ubuntugeek.com/author/ubuntufix
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+[a]:http://www.ubuntugeek.com/author/ubuntufix