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+NAME
+    netdiff - A simple script to diff a file or a directory of two hosts
+    over the network.
+
+    This is very helpful if you want to find out any difference of these two
+    hosts.
+
+  SYNOPSYS
+      netdiff HOSTNAME PATH [PORT] [ADDITIONAL DIFF OPTS]
+
+  USAGE
+    Cluster-SSH into two hosts at the same time and run on both hosts the
+    same (simultaneous) command:
+
+        netdiff HOSTNAME PATH
+
+    Where HOSTNAME can be the hostname of the first or the second host.
+    Depending on this the script will decide to be in the client or the
+    server role.
+
+    And where PATH musst be a full qualified path to a file or a directory.
+
+    Netdiff transfers everything in PATH (recursively and encrypted via
+    OpenSSL/AES) to the other host and computes a diff of it. The latter
+    with the diff tool.
+
+    If no port is specified the default port will be used which is defined
+    in
+
+      /etc/default/netdiff
+
+  EXAMPLE
+    A common use case is to find out the differences of the PAM
+    configuration. On most systems the PAM configuration is spread into
+    several small configuration files which are hard to compare by hand
+    between two hosts.
+
+    Given two hosts one.example.com and two.example.com. Just run this
+    command on both hosts simultaneously:
+
+      netdiff one.example.com /etc/pam.d
+
+    The same affect, but the other way around, would be the following
+    command:
+
+      netdiff two.example.com /etc/pam.d
+
+LICENSE
+    See package description or project website.
+
+AUTHOR
+    Paul Buetow - <http://netdiff.buetow.org>
+