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How to replace NewLine with comma using sed?

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# 1  
Old 07-02-2013
How to replace NewLine with comma using sed?
Hi ,

I have a huge file with following records and I want to replace the last comma with ',NULL'. I try using SED but could not create a correct script .

In my opinion I need a script which can convert ,/n with ,NULL/n

Code:
1,CHANGE_MEMBER,2010-12-28 00:05:00,
2,CHANGE_MEMBER,2012-09-02 00:00:20,3
3,CHANGE_MEMBER,2010-12-28 00:02:10,
4,CHANGE_MEMBER,2010-12-28 00:01:03,

Thanks in Advance
Ajay
Last edited by Scrutinizer; 07-02-2013 at 04:31 PM.. Reason: code tags
# 2  
Old 07-02-2013
Try:
Code:
sed 's/,$/,NULL/' file

# 3  
Old 07-02-2013
Quote:
Originally Posted by bartus11
Try:
Code:
sed 's/,$/,NULL/' file

Sorry that did not worked
# 4  
Old 07-02-2013
It should work. Perhaps you have whitespace after the last ,?

Code:
$ sed 's/,[[:blank:]]*$/,NULL/' file

(or use a literal space and tab inside a single [ and ] if your sed doesn't support character classes.)
# 5  
Old 07-02-2013
Quote:
Originally Posted by Scott
It should work. Perhaps you have whitespace after the last ,?

Code:
$ sed 's/,[[:blank:]]*$/,NULL/' file

(or use a literal space and tab inside a single [ and ] if your sed doesn't support character classes.)
Sorry , your first script was perfect .
I copied records from my txt file and created a new file using putty and bartus11's script worked perfectly on that.
but I am not sure what is wrong in my original txt file where it does not work.
Last edited by Ajaypal; 07-02-2013 at 05:40 PM.. Reason: change
# 6  
Old 07-02-2013
I would guess your file contained ^M (carriage return) characters at the end of each line.
# 7  
Old 07-02-2013
Run od or cat on your original file and check if there are any CR
Code:
od -c < file

OR
Code:
cat -evt file
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