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





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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