Bashscripts.org

this is probably a fairly easy task, but my scripting skills aren't up to par.

I need to take one plaintext file, and throw away any line that appears identically in any one of a series of plain text files.

The trick is that the lines will not be in the same order.

For example, an input file with the data


and two test files,



should return


I figure that the easiest way to write this is with one script that compares two files, then a second script to pass the output to the comparison with the next file. However, my attempts at the first piece have failed.

Everywhere I've turned shows me ways to compare two files line-by-line, which is NOT what i'm after here.

Thank you for your assistance.

This will work if the lines aren't supposed to be in any particular order
Otherwise I believe you need to tell us more about the structure of the file.

You can also use comm(1) to compare files, it might be somewhat easier to read

Best regards
Fredrik Eriksson

might fit your situation better;



* edited to put in code tags