look

Display lines beginning with a prefix in a sorted file. Note: The lines in the file must be sorted. See also: grep, sort. More information: https://man.openbsd.org/look.

• 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 (--alphanum and --ignore-case are assumed):

look {{prefix}}