Hi,

I need some help for file manipulation. I have a text file 150k lines long like below:
RHR
DVH001Test1
DVR001
DVR002
DVR001
DVR002
DVR001
DVR002
DVR001
DVR002
CGH001Test2
CGR001
CGR002
CGR001
CGR002
CGH001
CGR001
CGR002
DVH001Test3
DVR001
DVR002
DVR001
DVR002

I need to read this file line by line and then insert the DVH/CGH line after every DVR002/CGR002 line. So the above should be :

RHR
DVH001Test1
DVR001
DVR002
DVH001Test1
DVR001
DVR002
DVH001Test1
DVR001
DVR002
DVH001Test1
DVR001
DVR002
CGH001Test2
CGR001
CGR002
CGH001Test2
CGR001
CGR002
CGH001Test2
CGR001
CGR002
DVH001Test3
DVR001
DVR002
DVH001Test3
DVR001
DVR002
RTR

Thank for your time and help

Shreeni

Hi,

Please share with us what you have done so far.

Hi and welcome to LQ.

1. See the post above
2. I think you need to define your problem in clearer way because IMHO your definition and sample output are not consistent.
3. Have a look at SED's "a" command.
http://www.grymoire.com/Unix/Sed.html#uh-40

I got the problem solved with a bit Python code to simulate a control-break

Thank you all.