comparing two files using Shell script

Question

I have to compare two files which are like

    A                      B
   ---                    ---    
  110-01                 110-01
  120-02                 110-02
    ...                  120-02
                          ....

and have to print what are the extra elements present in the B file..

pixelbeat · Accepted Answer · 2010-10-27 10:35:14Z

2

You want the set difference.

For sorted files:

join -t'\0' -v2 file1 file2

For unsorted files:

sort file1 file1 file2 | uniq -u

For more set ops see http://www.pixelbeat.org/cmdline.html#sets

answered Oct 27, 2010 at 10:35

pixelbeat

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joni · Accepted Answer · 2010-10-27 06:28:25Z

1

You need diff: http://ss64.com/bash/diff.html

answered Oct 27, 2010 at 6:28

joni

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1 Comment

joni Over a year ago

Though it is pretty useless if your files consist only of one single line containing values seperated by space or comma

John Pickup · Accepted Answer · 2010-10-27 06:30:36Z

0

diff is the obvious choice but that of course compares at the line level and is appears the tokens present in your file are separated by spaces. You could use sed to change spaces to lines. Next sort both files and finally diff.

answered Oct 27, 2010 at 6:30

John Pickup

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