Tripwire is a program that reports changes to binaries.
Tripwire reads the data from a floppy, which can be 
set as read-only, which provides a greater level of security.
<h2>Set up</h2>
<ol>
<li> Format a floppy with a Unix file system: 
<code>fdformat</code>
<li> Create a new filesystem
<pre>
newfs /vol/dev/diskette0/unnamed_floppy
</pre>
Note that on the Mho cluster, the directory would
be <code>/vold</code> instead of <code>/vol</code>.
<li> Eject and then mount the floppy:
<pre>
eject floppy
volcheck
</pre>
<li> Go to a machine that already has tripwire on it
and copy the contents of the floppy to a directory
that is shared between the old and new machine.
<li> Copy tcheck to the new floppy
<pre>
cp -r ~/src/tcheck /floppy/unnamed_floppy
</pre>
<li> Remove the old database and update
<pre>
cd /floppy/unnamed_floppy/tcheck
./tripwire -initialize
<pre>
<li> cd to the root directory, eject the floppy,
write protect the floppy
<pre>
cd /
eject floppy
</pre>
<li> Add the following cron job entry:
<pre>
#
# tripwire
10 11 * * * /bin/csh -c '/bin/volcheck; cd /floppy/floppy0/tcheck; ./tripwire'
#
</pre>
</ol>