How do I print the (numerical) ASCII values of each character in a file?
Solution 1
The standard command for that is od
, for octal dump (though with options, you can change from octal to decimal or hexadecimal...):
$ echo Apple | od -An -vtu1
65 112 112 108 101 10
Note that it outputs the byte value of every byte in the file. It has nothing to do with ASCII or any other character set.
If the file contains a A in a given character set, and you would like to see 65, because that's the byte used for A in ASCII, then you would need to do:
< file iconv -f that-charset -t ascii | od -An -vtu1
To first convert that file to ascii and then dump the corresponding byte values. For instance Apple<LF>
in EBCDIC-UK would be 193 151 151 147 133 37
(301 227 227 223 205 045
in octal).
$ printf '\301\227\227\223\205\045' | iconv -f ebcdic-uk -t ascii | od -An -vtu1
65 112 112 108 101 10
Solution 2
hexdump
, od
, xxd
, or $YOUR_FAVORITE_LANGUAGE
can all do that.
% echo Apple | hexdump -C
00000000 41 70 70 6c 65 0a |Apple.|
00000006
% echo Apple | perl -ne 'printf "%vd\n", $_'
65.112.112.108.101.10
% echo Apple | clisp <( echo '(print (mapcar #'\''char-code (coerce (read-line *standard-input*) '\''list)))' )
(65 112 112 108 101)
%
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Comments
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Mtl Dev over 1 year
How can I print the numerical ASCII values of each character in a text file. Like
cat
, but showing the ASCII values only... (hex or decimal is fine).Example output for a file containing the word Apple (with a line feed) might look like:
065 112 112 108 101 013 004
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Mtl Dev about 8 yearsExcellent answer, thankyou. Especially hexdump -C. Awarded to Stephane simply because his answer also resolved, and he was first (by just a hair), but both are excellent.
-
jfs about 8 yearsYet another command:
python -c "print open('file', 'rb').read().encode('hex')"
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heemayl about 8 years@J.F.Sebastian Better
echo 'Apple' | python -c "import sys;print sys.stdin.read().encode('hex')"
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jfs about 8 years@heemayl : wrong. It may corrupt a binary file on Windows