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Joining 3 lines at a time

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# 8  
Old 12-09-2005
From man sed

Code:
       n N    Read/append the next line of input into the pattern space.

See Oreilly's Sed and Awk - 6.1 Multiline Pattern Space
# 9  
Old 12-09-2005
Quote:
Originally Posted by Sabari Nath S

for eg: sed 'N;s/\n/ /' can join pairs of lines ... but not 3 lines at a time .. I am searching for some kind of one liner like that .. not a script ..

Can anyone pls help ??
To join 3 lines try:
sed 'N;N;s/\n/ /'

4 lines? try:
sed 'N;N;N;s/\n/ /'
# 10  
Old 12-09-2005
Quote:
Originally Posted by Perderabo
sed 'N;N;s/\n/ /'
sed 'N;N;N;s/\n/ /'
You would need the global flag at the end of those statements. Like,

Code:
sed 'N;N;s/\n/ /g'

# 11  
Old 12-10-2005
A bit late
paste -d"\t\t\n" <file_name>
# 12  
Old 12-13-2005
Thanks all
Hi all ...

Thanks a lot for all replies ...

i got 4 solutions for to this ... and the sed one was simple .... I was new to n/N option in sed too .. thanks again to all ..
# 13  
Old 12-19-2005
For future reference, the simplest way to join three lines is to use the paste command, like this...
Code:
paste -d ' ' - - - < file1

# 14  
Old 12-20-2005
Wow !!! I was surprised to see such a small command doing this ... well cal u give an idea as to how it works ?? what do this 3 hyphens stand for ??
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