Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Number of differences between 2 files Post 39889 by criglerj on Wednesday 3rd of September 2003 12:20:45 PM
Old 09-03-2003
It's unclear what you mean by "number of changes". Number of changed lines? Number of changed characters? Number of changed regions?

Assuming the last of those (number of changed regions), one approach is to understand the output of diff. In Solaris diff (and most others, as I recall) the only lines that start with digits are the lines that specify the changed regions. so you can do this:
Code:
diff filea fileb | grep '^[1-9]' | wc -l

or
Code:
diff filea fileb | awk '/^[1-9]/ {i++} END {print i}'

But in either of these, you are at the mercy of diff, which may not have the same idea about what a "region" is as you do. With more modern diffs than I have at hand, e.g., gnu diff, you have a lot more options to control what diff shows as a difference region.
 

10 More Discussions You Might Find Interesting

1. Solaris

Differences between jar files

I want to find the difference between two jar files sitting on a sun box. How do I do this? (3 Replies)
Discussion started by: runnerpaul
3 Replies

2. Shell Programming and Scripting

Detect differences in two files

All, I have two csv files, the format of which are exactly the same. I would like to find differences between the two files but would like to identify the difference as opposed to just printing a different line. For exmaple File 1 xxx,yyy,zzz,1,2,3 111,222,333,xxx,yyy ... (4 Replies)
Discussion started by: pxy2d1
4 Replies

3. Shell Programming and Scripting

Eliminating differences in two files

Hello, I'm having trouble to read two txt files, they have employee records line by line, I need to do the reading of a file that is old and compare it with the new base in the new file, deleting the lines in old file, then add the new file data from the old file and write to the database manager.... (5 Replies)
Discussion started by: selmar
5 Replies

4. Shell Programming and Scripting

Differences between 2 Flat Files and process the differences

Hi Hope you are having a great weeknd !! I had a question and need your expertise for this : I have 2 files File1 & File2(of same structure) which I need to compare on some columns. I need to find the values which are there in File2 but not in File 1 and put the Differences in another file... (5 Replies)
Discussion started by: newbie_8398
5 Replies

5. UNIX for Dummies Questions & Answers

Finding differences between 2 text files

Hi everyone, I know that's a deep treated issue but I'm actually not able to find the solution. I have 2 plain text files with ~ 2000 rows and ~5 columns. The first column of the shortest file (f1) is fully contained by the first column of the biggest one (f2), but only that column. I want to... (6 Replies)
Discussion started by: OBAFGKM
6 Replies

6. Shell Programming and Scripting

Comparing two files and list the differences

Hi * I have two text files which has the file size, timestamp and the file name. I need to compare these two files and get the differences in the output format. Can anyone help me out with this. * cat file1.txt *474742 Apr 18* 2010 sample.log *135098 Apr 18* 2010 Testfile 134282 Apr 18* 2010... (7 Replies)
Discussion started by: Sendhil.Kumaran
7 Replies

7. Shell Programming and Scripting

How to count number of files in directory and write to new file with number of files and their name?

Hi! I just want to count number of files in a directory, and write to new text file, with number of files and their name output should look like this,, assume that below one is a new file created by script Number of files in directory = 25 1. a.txt 2. abc.txt 3. asd.dat... (20 Replies)
Discussion started by: Akshay Hegde
20 Replies

8. Shell Programming and Scripting

Help comparing 2 files and sending differences

I have 2 files that need to be compared. Email the differences if something is different and don't email if nothing is different. One or both of the files could be empty. One or both could have data in them. example files backup.doc.$(date +%y%m%d) file size is 0 backup.doc.$(TZ=CST+24... (4 Replies)
Discussion started by: jabbott3
4 Replies

9. Shell Programming and Scripting

Need to compare the two files and list out differences between the two

Hi, I need to compare the two files and list out difference between the two. Please assist. Best regards, Vishal (2 Replies)
Discussion started by: Vishal_dba
2 Replies

10. Shell Programming and Scripting

How to do find differences between 2 XML Files?

Hello All, Requirement is to compare 2 XML files and see if there are any differences but from some of the providers We are receiving UTF-16 formatted XML file with no end of line as shown below. Excerpt of data file: ÿþ<^@?^@x^@m^@l^@ ^@v^@e^@r^@s^@i^@o^@n^@=^@"^@1^@.^@0^@"^@... (11 Replies)
Discussion started by: Ariean
11 Replies
bdiff(1)						      General Commands Manual							  bdiff(1)

NAME
bdiff - Finds differences in large files SYNOPSIS
bdiff file1 file2 [number] [-s] bdiff - file2 [number] [-s] bdiff file1 - [number] [-s] The bdiff command compares file1 and file2 and writes information about their differing lines to standard output. If either filename is - (dash), bdiff reads standard input. OPTIONS
Suppresses error messages. (May either precede or follow the number argument if it is specified.) DESCRIPTION
The bdiff command uses diff to find lines that must be changed in two files to make them identical (see the diff command). Its primary purpose is to permit processing of files that are too large for diff. The bdiff command ignores lines common to the beginning of both files, splits the remainders into sections of number lines, and runs diff on the sections. The output is then processed to make it look as if diff had processed the files whole. If you do not specify number, a system default is used. In some cases, the number you specify or the default number may be too large for diff. If bdiff fails, specify a smaller value for number and try again. Note that because of file segmenting, bdiff does not necessarily find the smallest possible set of file differences. In general, although the output is similar, using bdiff is not the equivalent of using diff. NOTES
The diff command is executed by a child process, generated by forking, and communicates with bdiff through pipes. It should not normally be necessary to use this command, since diff can handle most large files. EXIT STATUS
No differences. Differences found. An error occurred. SEE ALSO
Commands: diff(1), diff3(1) bdiff(1)
All times are GMT -4. The time now is 04:38 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy