If you are only trying to do the job, a simple line of shell code is sufficient: (or 2 lines if the files are not sorted)

# if the files are not sorted, sort them
$ sort -k 1,1n file1 > file1.sorted
$ sort -k 1,1n file2 | join -v 1 file1.sorted - > file1.uniq

[download]

citromatik

In reply to Re: compare two files by citromatik
in thread compare two files by Anonymous Monk

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