I need a tool to find duplicates or similar blocks of text in a singular text file or set of text files

Question

I want to automate moving duplicate or similar C code into functions.

This must work under Linux.

Answer 1

Simian (noted earlier) is a good tool for this. I have been using CloneDetective on my project and it works great. CloneDetective is free, so it can't hurt to give it a try.