--- a/cygwin.rst	Sun Aug 01 23:40:39 2010 +0300
+++ b/cygwin.rst	Tue Aug 03 10:15:44 2010 +0300
@@ -57,3 +57,13 @@
 To start X application you must set 'DISPLAY':
 
   $ DISPLAY=:0 xterm&
+
+* Search for package.
+
+If you have file name or regex use (need internet connection):
+
+  $ cygcheck -p REGEX
+
+cygcheck use such link:
+
+  http://cygwin.com/cgi-bin2/package-grep.cgi?grep=REGEX