| uniq \- report repeated lines in a file |
| or the standard input, to the |
| standard output, comparing adjacent lines. |
| In the normal case, the second and succeeding copies |
| Repeated lines must be adjacent |
| Print (one copy of) duplicated lines. |
| Prefix a repetition count and a tab to each output line. |
| 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. |
| Fields are skipped before characters. |
| Field selection and comparison should be compatible with |
