学步园

USING XXD

A real binary editor shows the text in two ways: as it is and in hex format.
You can do this in Vim by first converting the file with the "xxd" program.
This comes with Vim.
   First edit the file in binary mode: >

        vim -b datafile

Now convert the file to a hex dump with xxd: >

        :%!xxd

The text will look like this:

        0000000: 1f8b 0808 39d7 173b 0203 7474 002b 4e49  ....9..;..tt.+NI
        0000010: 4b2c 8660 eb9c ecac c462 eb94 345e 2e30  K,.`.....b..4^.0
        0000020: 373b 2731 0b22 0ca6 c1a2 d669 1035 39d9  7;'1.".....i.59.

You can now view and edit the text as you like.  Vim treats the information as
ordinary text.  Changing the hex does not cause the printable character to be
changed, or the other way around.
   Finally convert it back with:
>
        :%!xxd -r

Only changes in the hex part are used.  Changes in the printable text part on
the right are ignored.

See the manual page of xxd for more information.