look — Display lines beginning with a prefix in a sorted file. Note: The lines in the file must be sorted. See also: `grep`, `sort`.
# source: tldr · verified

Examples:
  # Search for lines beginning with a specific prefix in a specific file [GNU]
    $ look prefix path/to/file
  # Case-insensitively search only on blank and alphanumeric characters [GNU]
    $ look [-f|--ignore-case] [-d|--alphanum] prefix path/to/file
  # Specify a string termination character (space by default) [GNU]
    $ look [-t|--terminate] ,

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