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uniq 995 B

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  1. .TH UNIQ 1
  2. .SH NAME
  3. uniq \- report repeated lines in a file
  4. .SH SYNOPSIS
  5. .B uniq
  6. [
  7. .B -udc
  8. [
  9. .BI +- num
  10. ]
  11. ]
  12. [
  13. .I file
  14. ]
  15. .SH DESCRIPTION
  16. .I Uniq
  17. copies the input
  18. .IR file ,
  19. or the standard input, to the
  20. standard output, comparing adjacent lines.
  21. In the normal case, the second and succeeding copies
  22. of repeated lines are
  23. removed.
  24. Repeated lines must be adjacent
  25. in order to be found.
  26. .TP
  27. .B -u
  28. Print unique lines.
  29. .TP
  30. .B -d
  31. Print (one copy of) duplicated lines.
  32. .TP
  33. .B -c
  34. Prefix a repetition count and a tab to each output line.
  35. Implies
  36. .B -u
  37. and
  38. .BR -d .
  39. .TP
  40. .BI - num
  41. The first
  42. .IR num
  43. fields
  44. together with any blanks before each are ignored.
  45. A field is defined as a string of non-space, non-tab characters
  46. separated by tabs and spaces from its neighbors.
  47. .TP
  48. .BI + num
  49. The first
  50. .IR num
  51. characters are ignored.
  52. Fields are skipped before characters.
  53. .SH SOURCE
  54. .B /sys/src/cmd/uniq.c
  55. .SH "SEE ALSO"
  56. .IR sort (1)
  57. .SH BUGS
  58. Field selection and comparison should be compatible with
  59. .IR sort (1).