diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 93d8bc60c..f5add4adf 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -1492,6 +1492,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Kali Linux: Professional Penetration-Testing Distribution](http://docs.kali.org)
 * [Learning Debian GNU/Linux](http://www.oreilly.com/openbook/debian/book/index.html)
 * [Linux 101 Hacks](http://thegeekstuff.s3.amazonaws.com/files/linux-101-hacks.zip) - Ramesh Natarajan (PDF)
+* [Linux Administration II : Linux as a Network Client](https://www.tuxcademy.org/download/en/adm2/adm2-en-manual.pdf) - Anselm Lingnau,Tobias Elsner (PDF)  (CC BY-SA)
 * [Linux Advanced Routing & Traffic Control HOWTO](http://lartc.org)
 * [Linux Appliance Design: A Hands-On Guide to Building Linux Appliances](http://librta.org/book.html) - Bob Smith, John Hardin, Graham Phillips, Bill Pierce (PDF, EPUB, MOBI)
 * [Linux commands Notes for Professionals](https://goalkicker.com/LinuxBook/) - Compiled from StackOverflow documentation (PDF)