in reply to Compare 3 files and print matches in Perl

Hi,

If you files are sorted one, you can use linux command comm to find the common lines from all the three files,

comm -12 fileA fileB | comm -12 - fileC 
    -1 : suppress lines unique to FILE1
    -2 : suppress lines unique to FILE2
    -3 : suppress lines that appear in both files
All is well. I learn by answering your questions...

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