--- a/fileid.rst	Tue Jul 27 16:17:23 2010 +0300
+++ b/fileid.rst	Tue Jul 27 16:21:12 2010 +0300
@@ -5,3 +5,19 @@
   http://www.garykessler.net/library/file_sigs.html
                 File signatures table
   http://www.magicdb.org/
+
+* Determine file type utilities.
+
+** file(1).
+
+Standard unix utility. It use /etc/magic db.
+
+** PEiD.
+
+PEiD detects most common packers, cryptors and compilers for PE files. It can currently detect more
+than 600 different signatures in PE files.
+
+Freewere, close source.
+
+  http://www.peid.info
+                home page