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Shellscript to sort duplicate files listed in a text file

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# 1  
Old 10-28-2009
Shellscript to sort duplicate files listed in a text file
I have many pdf's scattered across 4 machines. There is 1 location where I have other Pdf's maintained. But the issues it the 4 machines may have duplicate pdf's among themselves, but I want just 1 copy of each so that they can be transfered to that 1 location.

What I have thought is:
1) I have designed a script that will scan each of the 4 machines, and print the list of pdf files in a text file named list.txt.
2)So now I have all the pdf's listed in the list.txt file.
3) I need a shellscript that will now check this list and sort duplicate files. So that I know where are they located and even have them grouped together.
The list.txt contains the path along with the file name. so I guess we have to check just the ending file name part before ".pdf".
Please help me do this.


The list.txt looks like below, which is already generated.

Code:
/home/santosh/z_literature/MIF_Oxime_ph4_JBC_May2007.pdf
/home/santosh/z_literature/J_immun_biochemOFmif.pdf
/home/santosh/z_literature/sak/san/06_JCTC_06_bome.pdf
/home/santosh/z_literature/sak/san/03_IEJMD_05_nkr1.pdf
/home/santosh/z_literature/sak/san/07_JCAMD_06_CoRIA.pdf
/home/santosh/z_literature/sak/san/DDP-IV-JMM2007.pdf

# 2  
Old 10-28-2009

Copy them all to the single location; duplicates will be overwritten.

Then rm all the other PDFs.
# 3  
Old 10-28-2009
If you want to do it using a script
Code:
cat abc.txt
/home/santosh/z_literature/MIF_Oxime_ph4_JBC_May2007.pdf
/home/santosh/z_literature/J_immun_biochemOFmif.pdf
/home/santosh/z_literature/sak/san/06_JCTC_06_bome.pdf
/home/santosh/z_literature/sak/san/03_IEJMD_05_nkr1.pdf
/home/santosh/z_literature/sak/san/07_JCAMD_06_CoRIA.pdf
/home/santosh/z_literature/sak/san/DDP-IV-JMM2007.pdf
/home/santosh/z_literature/sak/san/06_JCTC_06_bome.pdf
/home/santosh/y_literature/sak/san/06_JCTC_06_bome.pdf

use inline perl
Code:
cat abc.txt |perl -e 'my %hash;while($full_filename = <>){ chomp ($full_filename);my @cols = split("/",$full_filename);push @{$hash{$cols[-1]}}, $full_filename;}print "-"x80,"\n";foreach my $fn (keys %hash){print "$fn\n";map {print "$_\n";} @{$hash{$fn}};print "-"x80,"\n";}'

Added output formatting for readability.

Replace abc.txt with what ever file you have.

HTH,
PL
# 4  
Old 10-28-2009
Another approach:

Code:
awk -F"/" 'a[$NF]{print a[$NF];print $0;next}{a[$NF]=$0}' file

# 5  
Old 10-28-2009
thanks Franklin52 your script did the trick!!
Also the others who helped thanks a lot, really appreciated your time you spared for the script!!
# 6  
Old 10-28-2009
Franklin52....Could you explain your command line ???

I don't understand what is the value of the array a

Thanx
# 7  
Old 10-28-2009
Quote:
Originally Posted by protocomm
Franklin52....Could you explain your command line ???

I don't understand what is the value of the array a

Thanx
Code:
awk -F"/" 'a[$NF]{print a[$NF];print $0;next}{a[$NF]=$0}' file

Explanation:

Code:
{a[$NF]=$0}

The value of array a is the current line, the index is the filename (last field : $NF).


Code:
a[$NF]{print a[$NF];print $0;next}

If a line has a file ($NF) defined in array a, print the the saved line of the element a[$NF] and the current line.

I hope this helps.
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