--- a/fs.rst	Fri Nov 12 22:27:30 2010 +0200
+++ b/fs.rst	Sat Nov 13 12:54:21 2010 +0200
@@ -126,3 +126,8 @@
   http://freshmeat.net/projects/rfstool/
 
 
+* Summary files size.
+
+  $ find . -type f -iname "*.log" -print0 | du --files0-from=- -c -m | tail -n 1 \
+      | (read first rest; echo $first)
+