Merging files in Unix

[hugheskbh]

Can someone tell how would I merge 3 different files: a header file with one record, a detail file with numerous records, and a trailer file with a trailer record. I need to merge these file into one with the header record, detail record and trailer record.

If anyone knows how to do this, please let me know.

Thanks

 

[StephanP]

Hello hugheskbh,

I think you can achieve it like this:

cat detailfile>>headerfile;cat trailerfile>>headerfile

I'm sure you can even do it in one step:

cat detailfile trailerfile>>headerfile

Anyway, afterwards headerfile will contain all 3 files. To preserve the sourcefiles try:

cat headerfile detailfile trailerfile>newfile

Kind Regards
Stephan

 

[PleaseGiveHelp]

Does anyone know if one can merge 3 files based on certain criteria. IE where file name starts with 9 digit code, merge those files and create new file. Is this possible?

 

[Ygor]

Wildcards used for filenames:-

* = any number of characters
? = any single character
[0-9] = any single character in the ascii range 0 thru 9

Merge all files where file name starts with 9 digit code....

cat [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]* > newfile

 

[PleaseGiveHelp]

and would i have to specify all file names or will the cat [000012_AP]* > new file do it for all files that start with 000012_AP?

 

[Ygor]

No, all you need for all files that start with 000012_AP is...

cat 000012_AP* > newfile

Maybe take a look at

http://steve-parker.org/sh/bourne.html