I have text files with tons of empty lines, how do I get rid of those in one second?
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For html or php files that I'll post on the net, I like to get rid of empty lines. Usually, they are leftovers of search and replace and I have never been able to get any of the replace functions of the editors I use to get rid of them. Now, sed is your friend... Written a long time ago for Unix systems, sed has been ported to a variety of operating systems, including Linux. It's is a non-interactive editor that works from a command line, with no GUI, so you do not waste time opening up windows, and clicking all over the place. So, open up a konsole (Figure 1) and move into the directory where your file resides ( |
) Figure 1: Start the Konsole |
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Here is what happens:
Now, you may have 100 html files to correct at the same time. That's where
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blueface, 13 April 2006
That does not work.
cubby, 05 October 2006
True, it would be:
foreach file (*html)
sed -i "" '/^$/d' $file
end
But you can also use:
sed -i "" '/^$/d' *.html
RF, 27 June 2007
cat filewith.txt | sed '/^$/d' >file without.txt
RICKLE, 21 November 2007
sed '/^s*$/' < input.txt > output.txt
This removes files with just white space on a line as well.
RICKLE, 21 November 2007
There is supposed to be a backslash before the s that didn't show up...
Spawn, 10 December 2007
This is crap. Do any of you have any idea how to write code on a website.
First error right off is:
bash: syntax error near unexpected token `('
Absolute crap. Doesn't work. Considering not every system will have foreach this is awfully stupid.
Gustavo, 11 December 2007
for i in *.html;do sed '/^$/d' < $i > tt;mv tt $i;done
Ismail, 20 December 2007
Sorry guys, but you make it so complicated with the scripting!
On the command line:
sed -i "" '/^$/d' *.html
Of course, I'd recommend backing up the whole directory as the "-i" option writes to the file "inplace".
Helldev, 18 January 2008
It will work...
grep -v '^$' 1.out > 4.out
Amit Pankaj, 27 May 2008
From all the above answers I would say the best is
sed -i "" '/^$/d' *.html
but i you need backup of the original then you should put the extension of the backup file e.g.
sed -i.bak "" '/^$/d' *.html
KDida, 13 August 2008
I have simillar problem but more complicated: I have 3 column but some of lines have only 2 column, for example :
xxx xxx xxx
xxx xxx xxx
xxx xxx xxx
xxx xxx <---- I want to remove this line
xxx xxx xxx
xxx xxx xxx
xxx xxx xxx
any idea ?
larry, 14 August 2008
awk -F' ' { if ( NF == 3 ) {print $0}}
larry, 14 August 2008
To print records only with 3 fields
awk -F' ' { if ( NF == 3 ) {print $0}} < source_file > new_file
mik, 10 December 2008
or simply:
awk 'NF==3' < source_file > new_file
mik, 10 December 2008
or simply:
awk 'NF==3' < source_file > new_file
des, 03 January 2009
Hey - before giving advice, try learning the commands!
Many of these are amateur advice with incorrect syntax.
Know it or shut up - bad advice is worse than no advice.
des, 03 January 2009
Hey - before giving advice, try learning the commands!
Many of these are amateur advice with incorrect syntax.
Know it or shut up - bad advice is worse than no advice.
Jason, 17 March 2009
Hey great tips!
This helped me a great deal.
Jason, 17 March 2009
Hey great tips!
This helped me a great deal.
anjan, 11 August 2009
pls send all unis programme
Tony, 28 August 2009
You can't rely on shell wildcards unless you're only dealing with a limited number of files with short names. As things scale, you may hit the dreaded "Arguments too long" failure. Better to use find in combination with xargs like:
find . -type f -name "*.html"| xargs -i $SHELL_COMMAND_YOU_WANT '{}'
The '{}' is substituted with each file name as it runs.
Shailen, 18 November 2009
Worked for me :-)
Shailen, 18 November 2009
Worked for me :-)
Shailen, 18 November 2009
Worked for me :-)
Kamaraj, 26 November 2009
Remove blank lines
This command also do the trick
grep . file_name > output_file_name
Kamaraj, 26 November 2009
Remove blank lines
This command also do the trick
grep . file_name > output_file_name
Ravi, 27 November 2009
awk '$0!~/[ t]/{print $0}' file_name
sriranga(77yrs old), 24 December 2009
tested for kannada scripts but have no effect.
sample kannada given below for further guidance.
please note that all kannada scripts furnished below will appear in unicode when previewed.
With regards,
-sriranga(77yrsold)
ಅ
ಆ
ಇ
ಈ
ಉ
ಊ
ಋ
ೠ
ಎ
ಏ
ಐ
ಒ
ಓ
ಔ
ಅಂ
ಅಃ
ಕ
ಕಾ
ಕಿ
ಕೀ
ಕು
ಕೂ
ಕೃ
ಕೄ
ಕೆ
ಕೇ
ಕೈ
ಕೊ
ಕೋ
ಕೌ
ಕಂ
ಕಃ
ಗ
ಗಾ
ಗಿ
ಗೀ
ಗು
ಗೂ
ಗೃ
ಗೄ
ಗೆ
ಗೇ
ಗೈ
ಗೊ
ಗೋ
ಗೌ
ಗಂ
ಗಃ
ಖ
ಖಾ
ಖಿ
ಖೀ
sriranga(76yrsold), 24 December 2009
tested for kannada scripts but have no effect.
sample kannada given below for further guidance.
please note that all kannada scripts furnished below will appear in unicode when previewed.
With regards,
-sriranga(77yrsold)
ಅ
ಆ
ಇ
ಈ
ಉ
ಊ
ಋ
ೠ
ಎ
ಏ
ಐ
ಒ
ಓ
ಔ
ಅಂ
ಅಃ
ಕ
ಕಾ
ಕಿ
ಕೀ
ಕು
ಕೂ
ಕೃ
ಕೄ
ಕೆ
ಕೇ
ಕೈ
ಕೊ
ಕೋ
ಕೌ
ಕಂ
ಕಃ
ಗ
ಗಾ
ಗಿ
ಗೀ
ಗು
ಗೂ
ಗೃ
ಗೄ
ಗೆ
ಗೇ
ಗೈ
ಗೊ
ಗೋ
ಗೌ
ಗಂ
ಗಃ
ಖ
ಖಾ
ಖಿ
ಖೀ
sriranga(76yrsold), 24 December 2009
tested for kannada scripts but have no effect.
sample kannada given below for further guidance.
please note that all kannada scripts furnished below will appear in unicode when previewed.
With regards,
-sriranga(77yrsold)
ಅ
ಆ
ಇ
ಈ
ಉ
ಊ
ಋ
ೠ
ಎ
ಏ
ಐ
ಒ
ಓ
ಔ
ಅಂ
ಅಃ
ಕ
ಕಾ
ಕಿ
ಕೀ
ಕು
ಕೂ
ಕೃ
ಕೄ
ಕೆ
ಕೇ
ಕೈ
ಕೊ
ಕೋ
ಕೌ
ಕಂ
ಕಃ
ಗ
ಗಾ
ಗಿ
ಗೀ
ಗು
ಗೂ
ಗೃ
ಗೄ
ಗೆ
ಗೇ
ಗೈ
ಗೊ
ಗೋ
ಗೌ
ಗಂ
ಗಃ
ಖ
ಖಾ
ಖಿ
ಖೀ
sriranga(76yrs old), 25 December 2009
Remove blank lines (by Kamaraj)
This command also do the trick
grep . file_name > output_file_name
Above program solved my problem to remove blanklines(vertical - i,e spaces between two characters) for Kannada successfully
for which i am very much thankful to author Sri Kamaraj).
I want program to convert the horizongal text lines into vertical lines. for example: "testing" should be converted into vertical lines as shown below=
t
e
s
t
i
n
g
Szczad, 26 January 2010
@SRIRANGA:
That should do the thing:
COS="asdsad"; while [ -n "$COS" ]; do echo $COS|cut -b 1; COS=`echo $COS|cut -b 2- -`; done
anonymous, 17 March 2006
Or even simpler:
foreach file(*html)
sed -i '/^$/d' $file
end