Viewing with Hex Editor
In order to analyze the file system, we have to view it using hexadecimal editor.
There are two common hex editors in Ubuntu:
hexedit
xxd
Now try to view the disk file by hexedit. If you haven't unmount it, do it now.
In the terminal,
There are three columns in the output:
Line number in hexadecimal
Content in Hexadeciaml
Content in ASCII
For one hex digit, 4 bits (2^4 = 16) are needed to represent 0-15(0-F). Two hex digits occipies 8bits = 1 byte, therefore they are in group of two.
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