Tool for updating all zone files with $TTL

[RG]

On Tue, 16 Nov 1999 bind-list at ddx.a2000.nu wrote:

> is there a tool writen by som1 to update all my zone files with the new
> TTL setting ?
> 
> 
> 
> 
Copy all your zone files to a tmp directory and execute this little shell
script.  Make sure there is also a "new" directory.  All your new zone
files will be in there.

#!/bin/bash
ls tmp | while read a
do
cp tmp/$a new/$a.bak
echo "\$TTL 43200" > new/$a
cat new/$a.bak >> new/$a
rm new/*.bak
done