# ptx > Generate a permuted index of words from text files. > More information: . - Generate a permuted index where the first field of each line is an index reference: `ptx --references {{path/to/file}}` - Generate a permuted index with automatically generated index references: `ptx --auto-reference {{path/to/file}}` - Generate a permuted index with a fixed width: `ptx --width={{width_in_columns}} {{path/to/file}}` - Generate a permuted index with a list of filtered words: `ptx --only-file={{path/to/filter}} {{path/to/file}}` - Generate a permuted index with SYSV-style behaviors: `ptx --traditional {{path/to/file}}`