link checking bot needed

I am looking for a link checking bot that will enable me to verify links, etc. for a collection of over 600 pages.  I would like to find something that I can run on my Unix server that will comb through all the html files in a group of subdirectories.

Another option would be some kind of service that does this from their own server.  The only ones I've found so far will check only a few links, rather than all the links I have on this large collection of pages.
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One further program:  It is Windows based, but it works pretty good.  So, if you have a windows computer w/internet connection readily available, you might try this one out: 
alligolfAuthor Commented:
I downloaded Linkbot!  It's great!

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