Shell Programming and Scripting

Hi All,

I have a list of files and want to find the difference between each file if there is difference then i want the file name to be printed and log the duplicate files

For example

Code:

Size     Filename
23        a1
23        a2
23        a3
45        a4

If i diff a1 and a2 and find difference then i want the file names to be logged else neglect the file.Even though the sizes are same for a1,a2,a3 i want the file names which is having difference and neglect the files which is having no difference.( In short i want to eliminate duplicate files).

You can run diff on each files, check the exit status and determine if it is different or similar. Here is an example:

Code:

diff a1 a2 > /dev/null

[ $? -ne 0 ] && echo "Different" || echo "Similar"

For diff command, following exit values shall be returned:

Code:

 0 - No differences were found.
 1 - Differences were found.
>1 - An error occurred.

You can omit the test [; use diff's exit code immediately:

Code:

diff a1 a2 > /dev/null && echo identical || echo different

wrong post

---------- Post updated at 01:54 PM ---------- Previous update was at 12:25 PM ----------

can you please provide me in a script as i have thousands of files