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In awk, try:
awk -F, '{n=$4; sub(/\.[0-9]*$/,x,n); print "conf zone", n ".0/24 del PTR", $4, $2}' file

perl -ne 'if (/(.*?),(.*?),,(10)\.(1[0-4]|[89])\.([01]?\d\d|2[0-4]\d|25[0-5])\.([01]?\d\d|2[0-4]\d|25[0-5])/) {
print "conf zone ",$3,"\.",$4,"\.",$5,".0\/24 del PTR ",$3,"\.",$4,"\.",$5,"\.",$6,"...

It will stop at 10.14.255.255 (well actually 10.14.999999.999999 but you shouldn't have any ip addresses like that).

Sorry based criteria for the 2nd last digit of IP address on original string. If your happy with "x" in 10.8.x.x to be any string of numbers then try this:

perl -aF, -ne 'printf "conf zone...

In that case, change the following line in your program:


/^option\s+domain-name-servers\s.*/ && s/([\w.]*\w)\.?/$ip{$1}||($donthave{$1}=$1)/eg;


to this -

...

Remove the echo in front of the "mv" command.

echo mv temp "$line" should read as mv temp "$line"

The actual files are modified and are present at the respective path!
Check this file on your system "/Users/richsark/test-US/dhcp/dhcp.in"

Don't remove the entire echo line... Use this...
...