If you are on a Unix platform, comm is the utility you want. It differentiates lines of the two input files into 'unique to file A', 'unique to file B', and 'common to both'. command line flags controls which of those categories are output.

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TTTATCGGTCGTTATATAGATGTTTGCA

In reply to Re: comparign two files by TomDLux
in thread comparign two files by Anonymous Monk

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