comm Command

The comm command is a command-line utility on Linux and other Unix-like operating systems that is used to compare the contents of two sorted files. It takes two files as input and produces three columns of output: lines unique to the first file, lines unique to the second file, and lines common to both files. Here are a few examples of how to use the comm command:

To compare the contents of two sorted files, you can use the following syntax:

$ comm file1 file2

If you want to suppress the column of lines that are unique to the first file, you can use the -1 option:

$ comm -1 file1 file2

To suppress the column of lines that are unique to the second file, you can use the -2 option:

$ comm -2 file1 file2

To suppress the column of lines that are common to both files, you can use the -3 option:

$ comm -3 file1 file2

You can also suppress all columns, you can use the -23 option.

$ comm -23 file1 file2

It’s important to note that the two input files must be sorted before running comm command and only one column can be suppressed at once.

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Other Linux Commands

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Other Linux Commands

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