Re: Comparing files in two directories
L.V.Gandhi wrote:
I have two directories A and B. In each directory, I have nearly 1000
files with same names. I would like to compare both directories and find
out which files differ more than say 5 lines. I use kompare and see
manually. How to do it in command line easily?
--
L.V.Gandhi
http://lvgandhi.tripod.com/
linux user No.205042
Try these diff commands. The verbosity is greater in the ones with the "u" option.
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First, some sample files are
created in directories A and B,
these files are identical.
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Wed Jun 13 15:01:18 (keith@jupiter) ~/difftest>find
.
./A
./A/one
./A/three
./A/two
./B
./B/one
./B/three
./B/two
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By default, the diff command does
not report anything if the files
are identical.
The "r" option is needed to have
diff recurse into the A and B
directories.
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Wed Jun 13 15:01:22 (keith@jupiter) ~/difftest>diff -r A B
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Add the "s" argument to show when
files are the same.
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Wed Jun 13 15:01:25 (keith@jupiter) ~/difftest>diff -rs A B
Files A/one and B/one are identical
Files A/three and B/three are identical
Files A/two and B/two are identical
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Let's change the B/two file to see
how diff reports the change.
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Wed Jun 13 15:01:29 (keith@jupiter) ~/difftest>echo "this one is different" > B/two
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Omit the "s" option if you want to
see only files that have changed.
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Wed Jun 13 15:02:02 (keith@jupiter) ~/difftest>diff -rs A B
Files A/one and B/one are identical
Files A/three and B/three are identical
diff -rs A/two B/two
1c1
< two
---
> this one is different
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The "u" option (unified diff)
displays more information
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Wed Jun 13 15:02:06 (keith@jupiter) ~/difftest>diff -ru A B
diff -ru A/two B/two
--- A/two 2007-06-13 15:01:18.000000000 -0600
+++ B/two 2007-06-13 15:02:02.000000000 -0600
@@ -1 +1 @@
-two
+this one is different
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To show only the filenames,
modify the B/three file.
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Wed Jun 13 15:09:20 (keith@jupiter) ~/difftest>echo "zzzzzzzz" > B/three
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Run the diff command and grep for
"diff" at the start of the line.
This will show only the filenames
that differ.
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Wed Jun 13 15:09:31 (keith@jupiter) ~/difftest>diff -r A B | grep "^diff"
diff -r A/three B/three
diff -r A/two B/two
Hope this is helpful.
========Keith
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