# look > Display lines beginning with a prefix in a sorted file. > See also: `grep`, `sort`. > More information: . - Search for lines beginning with a specific prefix in a specific file: `look {{prefix}} {{path/to/file}}` - Case-insensitively search only on alphanumeric characters: `look {{[-f|--ignore-case]}} {{[-d|--alphanum]}} {{prefix}} {{path/to/file}}` - Specify a string termination character (space by default): `look {{[-t|--terminate]}} {{,}}` - Search in `/usr/share/dict/words` (`--ignore-case` and `--alphanum` are assumed): `look {{prefix}}`