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Editorial Team
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Asked: 2026-06-03T02:05:57+00:00

How can I display only different rows using diff in a separate file? For

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How can I display only different rows using diff in a separate file?

For example, the file number 1 contains the line:

1;john;125;3
1;tom;56;2
2;jack;10;5

A file number 2 contains the following lines:

1;john;125;3
1;tom;58;2
2;jack;10;5

How to make in the following happen?

1;tom;58;2
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1 Answer

  1. Editorial Team

    a.txt:

    1;john;125;3
1;tom;56;2
2;jack;10;5

    b.txt:

    1;john;125;3
1;tom;58;2
2;jack;10;5

    Use comm:

    comm -13 a.txt b.txt 
1;tom;58;2

    The command line options to comm are pretty straight-forward:

    -1 suppress column 1 (lines unique to FILE1)

    -2 suppress column 2 (lines unique to FILE2)

    -3 suppress column 3 (lines that appear in both files)

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