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Full Discussion: How to check the duplicancy of file using shell script?
Top Forums Shell Programming and Scripting How to check the duplicancy of file using shell script? Post 302927311 by junior-helper on Tuesday 2nd of December 2014 04:30:23 AM
Old 12-02-2014
If those files are in a dedicated directory, I mean if there are no files other than the files you want to compare, try this
Code:
ls -t | head -n2 | paste - - | xargs diff -q

If there is no output, the files are the same.

If there are other files in the same directory, you would need to change ls to something like ls -t 20*_file.txt or the like.

In a script, the above approach could be something like
Code:
if ! ls -t | head -n2 | paste - - | xargs diff -q >/dev/null
then
    echo "Files differ"
else
    echo "Files are the same"
fi

These 2 Users Gave Thanks to junior-helper For This Post:
hemanthsaikumar rbatte1
 

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LEARN ABOUT MINIX

paste

PASTE(1)						      General Commands Manual							  PASTE(1)

NAME

       paste - paste multiple files together

SYNOPSIS

       paste [-s] [-d list] file...

OPTIONS

       -d     Set delimiter used to separate columns to list.

       -s     Print files sequentially, file k on line k.

EXAMPLES

       paste file1 file2   # Print file1 in col 1, file2 in col 2

       paste -s f1 f2	   # Print f1 on line 1 and f2 on line 2

       paste -d : file1 file2
			   # Print the lines separated by a colon

DESCRIPTION

       Paste  concatenates  corresponding  lines of the given input files and writes them to standard output. The lines of the different files are
       separated by the delimiters given with the option -s. If no list is given, a tab is substituted for every linefeed, except  the	last  one.
       If  end-of-file	is hit on an input file, subsequent lines are empty.  Suppose a set of k files each has one word per line.  Then the paste
       output will have k columns, with the contents of file j in column j.  If the -s flag is given, then the first file is on line 1, the second
       file on line 2, etc.  In effect, -s turns the output sideways.

       If  a list of delimiters is given, they are used in turn.  The C escape sequences 
, 	, \, and  are used for linefeed, tab, backslash,
       and the null string, respectively.

																	  PASTE(1)
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