adding new line after finding specific text


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# 1  
adding new line after finding specific text

hello i need some help here are the contents of my file.

test.txt

this is filename 1.mp3 http://www.url.com/filenamehashed
filename 2.mp3 http://www.url.com/fileamehashed
something_else.zip http://www.url.com/filenamehashed

so this file has 100 of these lines
filename url

I would like to alter this file so the output is this:
filename
url
empty space
filename
url
emptyspace
filename
url
emptyspace
etc etc


how would i go about doing this? one liners would be perfect.

thank you for your help
# 2  
you can use awk
Code:
awk '{printf "%s\n%s\n\n",$1,$2}' inputfile

# 3  
Quote:
Originally Posted by vidyadhar85
you can use awk
Code:
awk '{printf "%s\n%s\n\n",$1,$2}' inputfile

the file names contains spaces as shown in his sample, therefore using $1 and $2 might not be appropriate.

@OP, if you have Python, an alternative solution
Code:
#!/usr/bin/env python
for line in open("file"):
    line=line.strip().split()
    filename = ' '.join(line[:-1])
    url=line[-1]
    print filename
    print url
    print

output
Code:
# ./test.py
this is filename 1.mp3
http://www.url.com/filenamehashed

filename 2.mp3
http://www.url.com/fileamehashed

something_else.zip
http://www.url.com/filenamehashed

# 4  
With sed:

Code:
cat infile 
this is filename 1.mp3 http://www.url.com/filenamehashed
filename 2.mp3 http://www.url.com/fileamehashed
something_else.zip http://www.url.com/filenamehashed
% sed 's|\(.*\)\(http://.*\)|\1\
\2\
|' infile
this is filename 1.mp3 
http://www.url.com/filenamehashed

filename 2.mp3 
http://www.url.com/fileamehashed

something_else.zip 
http://www.url.com/filenamehashed

# 5  
thank you all for your ideas and replies..

i tried the sed one

sed 's|\(.*\)\(http://.*\)|\1\\2\|' test.txt
sed: -e expression #1, char 29: unterminated `s' command


is my syntax wrong?

Last edited by mscice; 06-07-2009 at 08:46 AM..
# 6  
you did a typo error look closely what radoulove written
full code is not written in single line
# 7  
perl:

Code:
while(<DATA>){
	my @tmp=split(/ (?=http.*)/,$_);
	print $tmp[0],"\n";
	print $tmp[1];
	print "\n";
	
}
__DATA__
this is filename 1.mp3 http://www.url.com/filenamehashed
filename 2.mp3 http://www.url.com/fileamehashed
something_else.zip http://www.url.com/filenamehashed

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