i'd recommend sed for this:
sed -e '/^mx/d' < mxremove.txt > mxremoved.txt
make sense? of course i'd put this sed line in a shell script and have it
execute on all files and output to the filename.new via a loop... etc...
i'm sure there are handful of other ways to do the same thing.
hope this helps.
> I can't figure out how to do this. I've tried to cobble something
> together from examples I've googled but I keep running into errors.
> Probably a simple misunderstanding.
> I've got 323 zone files of the style: sub.domain.tld.db
> Each file has two lines, one after the other, that look like this (among
> many other lines):
> mx 600 IN A 184.108.40.206
> mx0 600 IN A 220.127.116.11
> where the field separators are all tabs.
> I need to delete the first of these two lines in all the zone files.
> (Note that I do NOT need to change the serial numbers; I've got a
> program that does that. I only need to remove the top line of this
> pair of lines wherever it exists in the zone file.
> There is NEVER the first line without the second.
> Can someone help me with a simple script?
> Jeff Lasman, Nobaloney Internet Services
> 1254 So Waterman Ave., Suite 50, San Bernardino, CA 92408
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