Delete Lease From Dnsmasq in CentOS 7

dnsmasq keeps track of the DHCP leases it has in a file which is defined
by the dhcp-leasefile config option.

To delete a lease from dnsmasq, first stop dnsmasq

systemctl stop dnsmasq

Remove the lease from the file. On Ubuntu this lease file defaults to

Once the lease is removed, start dnsmasq.

systemctl start dnsmasq