Hi Gurus,
i am looking for script wherein compare two files and generate a third
file which has output from one file  which is not present on other.

e.g. file1 and file2 -> file3

file3 should have all the contents form file1 which is not there in
file2.

I did sorted file1 and file2 and ran comm -3 file1 file2 > file3 but
it doesn't contain the output lokking for.
Any help is greatly appreciated
TIA

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On 2006-10-21, tester wrote:
> Hi Gurus,
> i am looking for script wherein compare two files and generate a third
> file which has output from one file  which is not present on other.
>
> e.g. file1 and file2 -> file3
>
> file3 should have all the contents form file1 which is not there in
> file2.
>
>  I did sorted file1 and file2 and ran comm -3 file1 file2 > file3 but
> it doesn't contain the output lokking for.

comm -13 file1 file2 > file3

comm -23 file1 file2 > file3

--
Chris F.A. Johnson, author        <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

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tester wrote:
> Hi Gurus,
> i am looking for script wherein compare two files and generate a third
> file which has output from one file  which is not present on other.
>
> e.g. file1 and file2 -> file3
>
> file3 should have all the contents form file1 which is not there in
> file2.
>
>  I did sorted file1 and file2 and ran comm -3 file1 file2 > file3 but
> it doesn't contain the output lokking for.
> Any help is greatly appreciated
> TIA
>


If you want all the lines in file1 that are not in file2,
awk 'NR == FNR { a[$0]; next } !($0 in a)' file2 file1

If you want only uniq lines in file1 that are not in file2,
awk 'NR == FNR { a[$0]; next } !($0 in a) { print; a[$0] }
' file2
file1

--
Regards,

---Robert

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tester wrote:
> i am looking for script wherein compare two files and generate a third
> file which has output from one file  which is not present on other.
> e.g. file1 and file2 -> file3
> file3 should have all the contents form file1 which is not there in
> file2.
>  I did sorted file1 and file2 and ran comm -3 file1 file2 > file3 but
> it doesn't contain the output lokking for.

Have a look here:
news:1158818522.030928.321780@m73g2000cwd.googlegroups.com

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Thanks Michael Paoli..
That Helped....

> Have a look here:
> news:1158818522.030928.321780@m73g2000cwd.googlegroups.com

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