uniq(1)                  USER COMMANDS                    uniq(1)



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.   Input  and  output should always be different.  Note
     that repeated lines must be adjacent in order to  be  found;
     see  sort(1).   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
     comm(1), sort(1).




















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