Update free-programming-books.md

free-programming-books.md

@@ -781,7 +781,7 @@
 * [Google Shell Style Guide](http://google-styleguide.googlecode.com/svn/trunk/shell.xml)
 * [Introduction to the Command Line](https://launchschool.com/books/command_line) - Launch School
 * [Linux Shell Scripting Tutorial - A Beginner's Handbook](http://www.freeos.com/guides/lsst/)
-* [Linux Fundamentals](http://linux-training.be/linuxfun.pdf) (PDF)
+* [Linux Fundamentals](http://linux-training.be/linuxfun.pdf)
 * [The Bash Academy](http://www.bash.academy)
 * [The Command Line Crash Course](http://learncodethehardway.org/cli/book/) Z. A. Shaw
 * [Writing Shell Scripts](http://linuxcommand.org/lc3_writing_shell_scripts.php) - William E. Shotts, Jr.
@@ -1250,7 +1250,7 @@
 * [The Java Tutorial 4th Edition](http://download.oracle.com/javase/tutorial/) - Sharon Zakhour, Scott Hommel, Jacob Royal, Isaac Rabinovitch, Tom Risser, Mark Hoeber
 * [Think Java: How to Think Like a Computer Scientist](http://greenteapress.com/thinkapjava/) - Allen B. Downey
 * [Thinking in Java](http://www.mindview.net/Books/TIJ/)
-* [UML For Java Programmers](http://www.csd.uoc.gr/~hy252/references/UML_for_Java_Programmers-Book.pdf) - Robert Cecil Martin (PDF) (PDF)
+* [UML For Java Programmers](http://www.csd.uoc.gr/~hy252/references/UML_for_Java_Programmers-Book.pdf) - Robert Cecil Martin (PDF)
 * [Welcome to Java for Python Programmers](http://interactivepython.org/runestone/static/java4python/index.html) - Brad Miller
 * [Welcome to the Java Workshop](http://javaworkshop.sourceforge.net) - An Apache Project
 * [What's New in Java 8](https://leanpub.com/whatsnewinjava8/read) - Adam L. Davis