hexedit shows a file both in ASCII and in hexadecimal. The file can be a device as the file is read a piece at a time. You can modify the file and search through it.
|_service||0000000204204 Bytes||1363230331over 5 years ago|
|hexedit-search2a.diff||000001588315.5 KB||1267758429over 8 years ago|
|hexedit.spec||0000000841841 Bytes||15301581614 months ago|