Você pode usar de grep
qualquer maneira para pesquisar no arquivo - ele realmente não se importa se o arquivo de entrada é realmente texto ou não. Do 'man grep':
-a, --text
Process a binary file as if it were text; this is equivalent to the --binary-files=text option.
--binary-files=TYPE
If the first few bytes of a file indicate that the file contains binary data, assume that the file is
of type TYPE. By default, TYPE is binary, and grep normally outputs either a one-line message saying
that a binary file matches, or no message if there is no match. If TYPE is without-match, grep assumes
that a binary file does not match; this is equivalent to the -I option. If TYPE is text, grep
processes a binary file as if it were text; this is equivalent to the -a option. Warning: grep
--binary-files=text might output binary garbage, which can have nasty side effects if the output is a
terminal and if the terminal driver interprets some of it as commands.
Por favor, marque as palavras de cautela no final do segundo parágrafo. Você pode redirecionar os resultados do grep para um novo arquivo e examiná-lo com vi / less.