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sed newbie question

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# 1  
Old 05-21-2013
sed newbie question
hi all:

i am trying to use sed to separate hex bytes "363834574e292c20" to "36 38 34 57 4e 29 2c 20". i used the following script (googled)
Quote:
sed 's/\(..\)/\1 /g'
and i got "3 63 83 45 74 e2 92 c2 0".

how could i modify the script to meet my needs?

thanks
# 2  
Old 05-21-2013
That should work! You can also try:
Code:
sed 's/../& /g'

# 3  
Old 05-21-2013
Quote:
Originally Posted by Yoda
That should work! You can also try:
Code:
sed 's/../& /g'

thanks, yoda:

well, it didn't seem to work for me for some reasons:
Code:
dave@owls:~/tmp:$ sed 's/../& /g' test_sed
3 63 83 45 74 e2 92 c2 0

Last edited by Franklin52; 05-22-2013 at 03:24 AM.. Reason: Please use code tags for data and code samples
# 4  
Old 05-21-2013
Please post the output of below command:
Code:
od -c test_sed

# 5  
Old 05-21-2013
I do not have my system with me to try it right now but please check if below works-

sed 's/\(..\)/\2 /g'
# 6  
Old 05-21-2013
Quote:
Originally Posted by Yoda
Please post the output of below command:
Code:
od -c test_sed

Code:
dave@owls:~/tmp:$ od -c test_sed
0000000    3   6   3   8   3   4   5   7   4   e   2   9   2   c   2   0
0000020   \n                                                            
0000021

so that '\n" is an issue?

---------- Post updated at 12:48 PM ---------- Previous update was at 12:47 PM ----------

Quote:
Originally Posted by shekhar_4_u
I do not have my system with me to try it right now but please check if below works-

sed 's/\(..\)/\2 /g'
Code:
dave@owls:~/tmp:$ sed 's/\(..\)/\2 /g' test_sed    
sed: 1: "s/\(..\)/\2 /g": \2 not defined in the RE

Last edited by Scrutinizer; 05-21-2013 at 04:09 PM.. Reason: code tags
# 7  
Old 05-21-2013
Quote:
Originally Posted by ipfreak
so that '\n" is an issue?
That newline is absolutely fine.

It does work for me:
Code:
$ od -c file
0000000   3   6   3   8   3   4   5   7   4   e   2   9   2   c   2   0
0000020  \n
0000021

Code:
$ sed 's/../& /g' file
36 38 34 57 4e 29 2c 20

Last edited by Yoda; 05-21-2013 at 02:06 PM..
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