difference between the content of two files

问题

I have two files one file subset of other and i want to obtain a file which has contents not common to both.for example

File1

apple
mango
banana
orange
jackfruit
cherry
grapes
eggplant
okra
cabbage

File2

apple
banana
cherry
eggplant
cabbage

The resultant file, difference of above two files

mango
orange
jackfruit
grapes
okra

Any ideas on this are appreciated.

回答1:

use awk, no sorting necessary (reduce overheads)

$ awk 'FNR==NR{f[$1];next}(!($1 in f)) ' file2 file
mango
orange
jackfruit
grapes
okra

回答2:

You can sort the files then use comm:

$ comm -23 <(sort file1.txt) <(sort file2.txt)
grapes
jackfruit
mango
okra
orange

You might also want to use comm -3 instead of comm -23:

  -1              suppress lines unique to FILE1
  -2              suppress lines unique to FILE2
  -3              suppress lines that appear in both files

回答3:

1 Only one instance , in either

cat File1 File2 | sort | uniq -u

2 Only in first file

cat File1 File2 File2 | sort | uniq -u

3 Only in second file

cat File1 File1 File2 | sort | uniq -u

回答4:

1. Files uncommon to both files

diff --changed-group-format="%<" --unchanged-group-format="%>" file1 file2

2. File unique to first file

diff --changed-group-format="%<" --unchanged-group-format="" file1 file2

3. File unique to second file

diff --changed-group-format="" --unchanged-group-format="%>" file1 file2

Hope it works for you

来源：https://stackoverflow.com/questions/3832988/difference-between-the-content-of-two-files

标签

diff

unix