Update with Debian install note

README.linux

@@ -173,6 +173,26 @@ From here on, you can continue with the Titan installation guide, see /Install/d
 and then, optionally, the Eclipse installation guide.
 
 
+9. Important Note:  In later Debian and derived (Ubuntu etc.)  distributions Titan is avalable directly from repositories 
+and can be installed with:
+
+apt-get install eclipse-titan
+
+However, environment variables and your Makefile will still have to be configured manually:
+
+export TTCN3_DIR=/usr
+export PATH=$TTCN3_DIR/bin/:${PATH}
+export LD_LIBRARY_PATH=$TTCN3_DIR/lib:${LD_LIBRARY_PATH}
+
+Add to your Makefile the appropriate flags:
+
+# Flags for the C++ preprocessor (and makedepend as well):
+CPPFLAGS = ..... -I/usr/include/titan
+
+and 
+
+# Flags for the linker:
+LDFLAGS = -L/usr/lib/titan