Synopsis: tsv-uniq [options] [file...]
tsv-uniq filters out duplicate lines using fields as a key. Filtering is
based on the entire line when key fields are not provided. Options are
also available for assigning a unique id to each key and numbering the
occurrences of each key. Fields are specified using field number or field
name. Field names can be used when the input file has a header line.
Use '--help-verbose' for more details.