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Remove CR only on empty lines

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# 1  
Old 09-12-2012
Remove CR only on empty lines
Dear community,
I have two output files that contains some CR

Code:
# cat first.out 

1234567890           598679857648566               9
1234567234           365837465873465               4

2342343243           289374982374894               4

Code:
# cat second.out 

2342342342           567456456456546      462342342423443               4
4564645665           768768678678768      678678678678678              14

2342343244           353453453453453      456456456456456               5
3435345345           435345345345354      564564564564565               6

7534242344           879789879899087      234261012537152               4
3453453453           435345435345355      345345345353455               5

Is there a fast way to remove the CR only on empty lines?
So the results should be (as example for the second output):

Code:
# cat second.out 
2342342342           567456456456546      462342342423443               4
4564645665           768768678678768      678678678678678              14
2342343244           353453453453453      456456456456456               5
3435345345           435345345345354      564564564564565               6
7534242344           879789879899087      234261012537152               4
3453453453           435345435345355      345345345353455               5

The lines starts with numbers, so awk should be the sulution, but I cannot figured out how remove the CR ONLY on empty lines....

Thanks
Lucas
# 2  
Old 09-12-2012
You seem to want to remove empty lines. Really empty lines contain nothing, not even white space, so the following will do the trick:

Code:
sed '/^$/d' /path/to/infile > /path/to/outfile

In case your lines are not that empty - that is, they may contain white space (space or tab) but nothing else (replace "<spc>" and "<tab>" by literal tabs/spaces):

Code:
sed '/^[<spc><tab>]*$/d' /path/to/infile > /path/to/outfile

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
Lord Spectre
# 3  
Old 09-12-2012
Thanks, the first command works great! Smilie
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