convert Multiline file in one line file

Shell Programming and Scripting
1

Hi,
Hi, we have one input file and file contain single line and multiline date. We want to convert multiline line in one line. Each file start with sequence of 000000001, 000000002, 000000003 so on. We want to convert the multiline line in one line. All (single line and converted multiline to single line) data store in output file. Please help.

Ex. INPUT.txt
000000001 12335 Infinte solutiong PO box copyright
000000002 12335 Dhahran solutiong
PO box copyright

Ex. output.txt
000000001 12335 Infinte solutiong PO box copyright
000000002 12335 Dhahrasolutiong PO box copyright

2 
cat multiline.txt | perl -e ' while ( <> ) { 
  chomp; 
  print "\n" if m/^\d{9}\s.*/ ;
  print "$_ ";
} 
print "\n";'

The removal of the first empty line is left as an excercise to the reader :wink:

1 Like
3

Thanks for exercise. but above code is not converting multiline into one line.

4

Hmm, interesting, seems to work ok for me:

merzky@thinkie:~/test/unix.com$ cat multiline.txt 
000000001 12335 Infinte solutiong PO box copyright
000000002 12335 Dhahran solutiong
PO box copyright

merzky@thinkie:~/test/unix.com$ cat multiline.txt | perl -e ' while ( <> ) { 
>   chomp; 
>   print "\n" if m/^\d{9}\s.*/ ;
>   print "$_ ";
> } 
> print "\n";'

000000001 12335 Infinte solutiong PO box copyright 
000000002 12335 Dhahran solutiong PO box copyright 
merzky@thinkie:~/test/unix.com$

What is the output you are seeing?

1 Like
5

now it is working. thanks for your help

6 
sed -e :a -e '$!N;s/\n\([^00]\)/\1/;ta' -e 'P;D' INPUT.txt
7

Well, that is nicer and quicker than mine I think - kudos! :slight_smile: