how to find the diff of two sorted files (compare line by lilne)

file 1:

a
b
c
d
e
.
.
z

file2:

d
g
开发者_Python百科k

how do I find the data exists in 1 but not 2.

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There is a utility that already does that:

comm -23 file1 file2

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use unix comm

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The POSIX standard comm utility also does this.

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Use a program that does exactly that. i'm using kdiff3. for windows i think there is winmerge