compare three file

diff3 -a file1 file2 file3
It takes a hunk and shows the different between the three file. Useful when you want to compare two different changed file which from the same base file. (use emacs ediff3, eyecandy and more useful if you want to merge them from anywhere to anywhere)
Sample Output
====
1:2c
  two
2:2c
  two - 2
3:2c
  two -22

-8
2009-02-21 21:52:46

What Others Think

This is an absolutely indispensable command when porting software since you need to understand the difference between a) release source old, b) release source new c) your port of release source old. Then you can see what you have to put in d) your port of release source new. Eg including bug fixes you put in which are not in the release source. Why have folks marked this down? Very odd.
mpb · 384 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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