Linux 在unix中查找两个文件之间差异的最快方法？
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Fastest way of finding differences between two files in unix?
提问by Steam
I want to find the difference between two files and then put only the differences in a third file. I saw different approaches using awk, diff and comm. Are there any more ?
我想找到两个文件之间的差异，然后只将差异放在第三个文件中。我看到了使用 awk、diff 和 comm 的不同方法。还有吗？
eg.Compare two files line by line and generate the difference in another file
eg.Copy differences between two files in unix
I need to know which is the fastest way of finding all the differences and listing them in a file for each of the cases below -
我需要知道哪种最快的方法可以找到所有差异并将它们列在以下每种情况的文件中 -
Case 1 - file2 = file1 + extra text appended.
Case 2 - file2 and file1 are different.
采纳答案by danmc
You could try..
你可以试试..
comm -13 <(sort file1) <(sort file2) > file3
or
或者
grep -Fxvf file1 file2 > file3
or
或者
diff file1 file2 | grep "<" | sed 's/^<//g' > file3
or
或者
join -v 2 <(sort file1) <(sort file2) > file3
回答by P_M
You could also try to include md5-hash-sums or similar do determine whether there are any differences at all. Then, only compare files which have different hashes...
您也可以尝试包含 md5-hash-sums 或类似的内容来确定是否存在任何差异。然后，只比较具有不同哈希值的文件......
回答by pron
Another option:
另外一个选项：
sort file1 file2 | uniq -u > file3
If you want to see just the duplicate entries use "uniq -d" option:
如果您只想查看重复的条目，请使用“uniq -d”选项：
sort file1 file2 | uniq -d > file3
回答by James Bond 86
This will work fast:
这将快速工作：
Case 1 - File2 = File1 + extra text appended.
案例 1 - File2 = File1 + 附加的额外文本。
grep -Fxvf File2.txt File1.txt >> File3.txt
grep -Fxvf File2.txt File1.txt >> File3.txt
File 1: 80 Lines File 2: 100 Lines File 3: 20 Lines
文件 1：80 行文件 2：100 行文件 3：20 行
