diff --git a/sources/How to Install Linux Kernel 3.12 in Ubuntu 13.10.md b/sources/How to Install Linux Kernel 3.12 in Ubuntu 13.10.md
index 687778e178..c78ef49b3d 100644
--- a/sources/How to Install Linux Kernel 3.12 in Ubuntu 13.10.md	
+++ b/sources/How to Install Linux Kernel 3.12 in Ubuntu 13.10.md	
@@ -1,3 +1,5 @@
+translating by coolpigs
+
 How to Install Linux Kernel 3.12 in Ubuntu 13.10
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 **Ubuntu 13.10 users don't have to look with envy at the new Linux kernels that are released, and they can update their systems with relative ease.**
diff --git a/sources/How to Make a YouTube Instructional Screencast Video on Linux.md b/sources/How to Make a YouTube Instructional Screencast Video on Linux.md
index 15ed5b1ece..b49acb0577 100644
--- a/sources/How to Make a YouTube Instructional Screencast Video on Linux.md	
+++ b/sources/How to Make a YouTube Instructional Screencast Video on Linux.md	
@@ -1,3 +1,5 @@
+translating by coolpigs
+
 How to Make a YouTube Instructional Screencast Video on Linux
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 A picture is worth a thousand words, and a well-crafted how-to video is darned near priceless. Linux has all the tools you need to make high-quality and useful instructional videos. We shall make a simple screencast with the wonderful Kdenlive video editor and the Audacity audio recorder and editor, and learn how to share this splendid screencast on YouTube.