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


     uniq - report repeated lines in a file


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


     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.


     sort (I), comm (I)