topic Re: diff file in Operating System - HP-UX

diff file

Son dam bi — Thu, 23 Jul 2009 02:51:15 GMT

I have two files want to be find the difference , the format is as below

file A
======
$vi fileA
file1.txt
file2.txt
file3.txt
file4.txt
"

file B
======
$vi fileB
testfile1.txt
testfile2.txt
testfile3.txt
test5.txt
"

the file B has the files but all files begins with "test" , if I use diff to find the difference , it will pop all lines are different .

Can advise if I want to ignore such kind of difference , that mean if the line in file B is begins with the "test" , then treat this is not a difference , so that the result is as below , what can i do ? thx

my desired diff result
===============
< test4.txt
---
> test5.txt

Re: diff file

Yogesh M Puranik — Thu, 23 Jul 2009 03:41:12 GMT

Hi Son,

Well the diff command captures minute differnces also, even a space as well as a comma.

So I dont think so you will get your required output using diff comand.

Rgds

Yogesh

Re: diff file

Son dam bi — Thu, 23 Jul 2009 05:15:40 GMT

thx reply ,

if diff not work for me , how can I find the difference in my case ? can you adivse ? thx

Re: diff file

Dennis Handly — Thu, 23 Jul 2009 09:14:46 GMT

>if I want to ignore such kind of difference, that mean if the line in file B is begins with the "test", then treat this is not a difference

You'll have to convert file B so it is the same "format" as file A:
sed -e 's/^test//' fileB > fileB.new
diff fileA fileB.new

Re: diff file

Shiv007 — Fri, 24 Jul 2009 02:41:26 GMT

Also try.

sdiff

Re: diff file

Steven Schweda — Fri, 24 Jul 2009 03:09:53 GMT

> You'll have to [do some specific thing ...]

Any statement like this is almost certainly
false. I'm still waiting to be shown the
computer problem which admits only one
solution.

> [...] what can i do ?

I have no idea what you can do. Many people
would write some kind of computer program to
solve a problem like this, but that would
probably require a more precise description
of what might possibly be in the files.