How to diff two files with same number of lines, and get only different lines
Given 2 files which have the same number of lines, is it possible the get a diff with ONLY change (c), in other words, WITHOUT additions (a) and deletions (d)?
For example, here are 2 files with 10 lines each.
file1.txt:
apple
apple
pear
grape
pear
grape
pear
pear
pear
apple
file2.txt:
apple
apple
pear
pear
pear
pear
pear
pear
pear
apple
Calling diff file1.txt file2.txt would produce:
4d3
< grape
6c5,6
< grape
---
> pear
> pear
Is it possible to get a result like:
4c4
< grape
---
> pear
6c6
< grape
---
> pear
command-line diff
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
add a comment |
Given 2 files which have the same number of lines, is it possible the get a diff with ONLY change (c), in other words, WITHOUT additions (a) and deletions (d)?
For example, here are 2 files with 10 lines each.
file1.txt:
apple
apple
pear
grape
pear
grape
pear
pear
pear
apple
file2.txt:
apple
apple
pear
pear
pear
pear
pear
pear
pear
apple
Calling diff file1.txt file2.txt would produce:
4d3
< grape
6c5,6
< grape
---
> pear
> pear
Is it possible to get a result like:
4c4
< grape
---
> pear
6c6
< grape
---
> pear
command-line diff
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
add a comment |
Given 2 files which have the same number of lines, is it possible the get a diff with ONLY change (c), in other words, WITHOUT additions (a) and deletions (d)?
For example, here are 2 files with 10 lines each.
file1.txt:
apple
apple
pear
grape
pear
grape
pear
pear
pear
apple
file2.txt:
apple
apple
pear
pear
pear
pear
pear
pear
pear
apple
Calling diff file1.txt file2.txt would produce:
4d3
< grape
6c5,6
< grape
---
> pear
> pear
Is it possible to get a result like:
4c4
< grape
---
> pear
6c6
< grape
---
> pear
command-line diff
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
Given 2 files which have the same number of lines, is it possible the get a diff with ONLY change (c), in other words, WITHOUT additions (a) and deletions (d)?
For example, here are 2 files with 10 lines each.
file1.txt:
apple
apple
pear
grape
pear
grape
pear
pear
pear
apple
file2.txt:
apple
apple
pear
pear
pear
pear
pear
pear
pear
apple
Calling diff file1.txt file2.txt would produce:
4d3
< grape
6c5,6
< grape
---
> pear
> pear
Is it possible to get a result like:
4c4
< grape
---
> pear
6c6
< grape
---
> pear
command-line diff
command-line diff
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
asked Dec 17 '18 at 18:17
Ron LauRon Lau
1312
1312
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Try this:
diff <(nl file1.txt) <(nl file2.txt) | awk '{$2=""; print}' | sed -e 's/^([<>]) /1 /'
The nl command numbers the lines, which makes it possible to use diff line-by-line. The awk command selects everything in the diff output except for the line numbers added by nl. In other words, it removes the line numbers. The sed command removes an awkward extra space that awk leaves behind.
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try this:
diff <(nl file1.txt) <(nl file2.txt) | awk '{$2=""; print}' | sed -e 's/^([<>]) /1 /'
The nl command numbers the lines, which makes it possible to use diff line-by-line. The awk command selects everything in the diff output except for the line numbers added by nl. In other words, it removes the line numbers. The sed command removes an awkward extra space that awk leaves behind.
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
add a comment |
Try this:
diff <(nl file1.txt) <(nl file2.txt) | awk '{$2=""; print}' | sed -e 's/^([<>]) /1 /'
The nl command numbers the lines, which makes it possible to use diff line-by-line. The awk command selects everything in the diff output except for the line numbers added by nl. In other words, it removes the line numbers. The sed command removes an awkward extra space that awk leaves behind.
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
add a comment |
Try this:
diff <(nl file1.txt) <(nl file2.txt) | awk '{$2=""; print}' | sed -e 's/^([<>]) /1 /'
The nl command numbers the lines, which makes it possible to use diff line-by-line. The awk command selects everything in the diff output except for the line numbers added by nl. In other words, it removes the line numbers. The sed command removes an awkward extra space that awk leaves behind.
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
Try this:
diff <(nl file1.txt) <(nl file2.txt) | awk '{$2=""; print}' | sed -e 's/^([<>]) /1 /'
The nl command numbers the lines, which makes it possible to use diff line-by-line. The awk command selects everything in the diff output except for the line numbers added by nl. In other words, it removes the line numbers. The sed command removes an awkward extra space that awk leaves behind.
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
edited Dec 17 '18 at 23:29
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
answered Dec 17 '18 at 21:04
Aarre LaaksoAarre Laakso
113
113
add a comment |
add a comment |
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