[SOLVED] diff command !

[eaglelinux]

Hello !

When I use diff to show difference between two files, I take this output:

5,30c5,6
<  10.10.50.6
<  10.10.50.7
<  10.10.50.10
<  10.10.50.131
<  10.10.50.132
<  10.10.50.133
<  10.10.50.134
<  10.10.50.135
<  10.10.50.136
<  10.10.50.138
<  10.10.50.139
<  10.10.50.140
<  10.10.50.141
<  10.10.50.142
<  10.10.50.143
<  10.10.50.145
<  10.10.50.146
<  10.10.50.147
<  10.10.50.148
<  10.10.50.153
<  10.10.50.154
<  10.10.50.155
<  10.10.50.156
<  10.10.50.157
<  10.10.50.158
<  10.10.50.161
---
>  
> 

Now I want to use diff to take an output without symbols " --- > > ", " < ", " 5,30c5,6 " , so only difference between texts.

Thank you !

[jpollard]

I think you will be confused by the result - with lots of duplicate lines (normally there are a preceding/trailing 5 lines to give context).

Having just the differences without knowing which is which is useless.

Perhaps a different command is what you want - read the man page on "comm", which identifies common lines, lines in the first file that aren't in the second, and/or lines in the second that are not in the first.

[stevea]

Try 'diff -Nau' and for directories full of file use 'diff -Naur dir1 dir2'
You can use the output as input to 'patch' and related utilities.

Originally Posted by eaglelinux

Hello !

When I use diff to show difference between two files, I take this output:

5,30c5,6
<  10.10.50.6
...
---
>  

Now I want to use diff to take an output without symbols " --- > > ", " < ", " 5,30c5,6 " , so only difference between texts.

Thank you !

No you DON'T want that (despite what you think). If you didn't have the initial characters you would have no means to tell which lines were included vs. excluded.

Learn to use diff -u... and patch.
If you want to persist in doing things the hard way, then learn to use grep and sed.

[eaglelinux]

Hi,

Thank you very much for your support but now I have solved this problem using:

diff text1.txt text2.txt > res.txt; cat res.txt | grep 10.10.50.* > res1.txt

Now the results in file res1.txt are OK.

Thank you !

[stevea]

diff text1.txt text2.txt > res.txt; cat res.txt | grep 10.10.50.* > res1.txt
diff text1.txt text2.txt | grep 10.10.50.* > res1.txt

Use the pipe Luke, it surrounds us and penetrates us. It binds the galaxy together