On 10/17/18 11:04 AM, Mike Wright wrote:
I have a set of dns zone text files in "bind" format. On the fourth
line there is a 10 digit timestamp (ignoring white space, the first
field). There is no way to predetermine the value so search and replace
by value is a no go and seems to require some positional approach such
as "line 4, first 10 digit field".
What is the easiest way to replace each of them with the same value,
$(date +%s) ?
sed -i -e "4s/[0-9]\{10\}/$(date +%s)/" filename
Make sure you back up the files before trying this. You can also add an
extension to the -i option to automatically make backups. You can also
probably do all the files at once, but I haven't tested that.
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