Linux

You did not say what the resulting file should look like.
To combine two files together you can use the copy command.


cp sourcefile1+sourcefile2 destinationfile

That will put the two files together in sequencial order.

To merge them together like tags, page#, line#, column# you have to write a program to do it.

cat file1 >> file2
this will append file2 to the end of file one

IJust use the simple cat utility, for example if you have fil1 ( with tags)
and file2 ( with the data), all you have to do is:

cat file2 >> file1
done.

hope that helps.

If the above answers your question, look no further, otherwise: Welcome to the world of hard-core unix: You need to refine your question. If the files are line-for-line ok and you just want to do a "column-merge" look at: paste -d If the tags in the first file refer to a line in the second file, then you may need to sort one (or both) files first-> get rid of duplicates (uniq) -> get rid of other stuff (cut, grep, sed) and then finally join (one of the harder commands to master). I had two files I had to merge together: One had IP addresses and printer names, the other had printer names and printer setups. I "linked" them together with the printer name, but had a lot of cleaning up to do first... Presevere, there is daylight after you master these. (My end file was 2900 bytes long, so it's a LOT smaller than any 'C' program)

There are too many unknowns in your question for a definitive answer, but a general solution is to broaden your constraints slightly and use Perl, available on most systems. One line of code to open each file, a line or two of code to read the datafile into a hash table, and another line or 2 to scan the tag table gor tags and substitute from the hash table. This kind of problem is why Perl exists!