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What's the command to remove empty lines with sed?

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# 1  
Old 09-03-2010
What's the command to remove empty lines with sed?
Code:
3

10 20

10 100

100 10000

Output:
Code:
3
10 20
10 100
100 10000



---------- Post updated at 07:59 AM ---------- Previous update was at 07:56 AM ----------

sed '/^$/d' file doesn't work.
Last edited by cola; 09-04-2010 at 12:23 AM..
# 2  
Old 09-04-2010
the empty lines are removed in your output
# 3  
Old 09-04-2010
Quote:
Originally Posted by frank_rizzo
the empty lines are removed in your output
No,file is the input file.
# 4  
Old 09-04-2010
oh so you mean output is your desired output. do those lines have tabs or spaces? if so they wont match that pattern.
# 5  
Old 09-04-2010
No tab/spaces.
# 6  
Old 09-04-2010
Quote:
Originally Posted by cola
No tab/spaces.
i dont believe you. post the output of this command

Code:
od -cx input.file

# 7  
Old 09-04-2010
Code:
sed -n '/^$/!p'

Last edited by Scott; 09-04-2010 at 07:48 AM.. Reason: Code tags
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