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start line numbering with arbitrary number?

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# 1  
Old 08-04-2011
start line numbering with arbitrary number?
Hi,

I want to do the following:
Extract some lines from different files and copy them into one file, with the first column being the line number. I do this with
cat file1 file2 file3 |grep 'xxx' |nl > output.file

Works fine. But if I want to add data of interest from a fourth file to the existing (just generated) output.file, is there a way I can start the line numbering with an arbitrary number so it wouldn't start with 1 again?

Thanks in advance for any help with that one.
Best, paracetamol
# 2  
Old 08-04-2011
Hi,

Try this:
Code:
$ grep remarks infile | nl > outfile
$ cat outfile
     1  remarks|18|19
     2  remarks|28|29
$ grep 11 infile | nl -v $(( $(wc -l <outfile) + 1 )) >> outfile
$ cat outfile
     1  remarks|18|19
     2  remarks|28|29
     3  A_1|11|12|13|14|15|16

Regards,
Birei
This User Gave Thanks to birei For This Post:
paracetamol
# 3  
Old 08-04-2011
Yeah, that works - many thanks!
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