Scientific Operations



UNIQ(I)                      12/1/72                      UNIQ(I)



NAME
     uniq - report repeated lines in a file

SYNOPSIS
     uniq [ -udc [ +n ] [ -n ] ] [ input [ output ] ]

DESCRIPTION
     Uniq  reads the input file comparing adjacent lines.  In the
     normal case, the second and succeeding  copies  of  repeated
     lines  are  removed;  the remainder is written on the output
     file.  Note that repeated lines must be adjacent in order to
     be  found;  see  sort(I).   If the -u flag is used, just the
     lines that are not repeated in the original file are output.
     The  -d  option specifies that one copy of just the repeated
     lines is to be written.  The normal mode output is the union
     of the -u and -d mode outputs.

     The  -c  option supersedes -u and -d and generates an output
     report in default style but with each  line  preceded  by  a
     count of the number of times it occurred.

     The  n arguments specify skipping an initial portion of each
     line in the comparison:

         -n  The first n fields together with any  blanks  before
             each are ignored.  A field is defined as a string of
             non-space, non-tab characters separated by tabs  and
             spaces from its neighbors.

         +n  The  first  n  characters  are  ignored.  Fields are
             skipped before characters.


SEE ALSO
     sort(I), comm(I)

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