$ nwatch HOSTLIST CACHEDIR
Example with root privileges:
# nwatch /etc/nwatch.mynet /var/cache/nwatch/mynet
Prints the results of an
ndiff(1) call against the last known scan to stdout;
intended to be called from
0 0 * * 0 nwatch /etc/nwatch.mynet /var/cache/nwatch/mynet
I recommend you use Mail::Run::Crypt, so you don't leak your network information in plain text in your email.
Please also consider whether your scan actually requires root privileges, and could not instead be run by a dedicated user with appropriately limited privileges.
Nmap is a registered trademark of Insecure.Com LLC, and this project is not affiliated with it.