To convert file with decimal to another file with Hexadecimal

Shell Programming and Scripting
1

I have a text file of alphanumeric values listed one by one. I have to convert them to hexadecimal equivalents for each character seperated by ":" in Unix bash shell script. For example, 12345678 has to be converted to 31:32:33:34:35:36:37:38

2

what is the logic for the below ?

12345678 has to be converted to 31:32:33:34:35:36:37:38

for 1 the hexadecimal is 1 only.. how come it will come as 31 ?

3

Hi,

Sorry! Its actually ascii charcaters to hexadecimal seperated by ":"

4

is it assignment ?

check here...

what you tried so far ?

5

This should do it..

 
echo "1234" | perl -F// -lane 'BEGIN{$\=":"} print "", unpack("H*",$_) for @F'

This is the output I've got

 
31:32:33:34:
6

Its not an assignment.

I went to the link u suggested above. It talks about ascii chart and extended ascii chart (which i already have), hence not useful for me.

There is another link talks about file. It refers to some order.txt but that order.txt is not available.

7

and read how to read character by character

and you can easily form a solution

1 Like
8

@getmmg,

Thanks, it works for conversion. But this does not seem to print line by line. In my file, the string in each line is 19 characters. Also, if i can get the output in a file, it will be more useful

For file, i tried:

for i in `cat xyz.txt`; do
echo "$i" | perl -F// -lane 'BEGIN{$\=":"} print "", unpack("H*",$_) for @F'
done
9

This should print them line by line.

perl -F// -lane 'BEGIN{$"=":"} push(@arr,unpack("H*",$_)) for @F; print "@arr"; @arr=()' ascii

If you want the o/p in a file, Redirect it using >.

1 Like
10

Assuming 19 characters to dump per line and that the newline is a delimiter which should be passed through unmodified (tested with OSX's hexdump):

hexdump -ve '18/1 "%x:" /1 "%x" /1 "%c"' infile > outfile

Regards,
Alister

1 Like
11

@getmmg,

Thanks for the help. It worked.

@itkamaraj,

Thanks for your pointers! They helped me to write my own code in unix shell script.

@alister,

Thank you!

---------- Post updated at 12:20 PM ---------- Previous update was at 12:15 PM ----------

My query is resolved and this thread can be closed!