eproust, since yours was a fresh install the cause of your problem is unlikely to be the same. But you may want to install the debsums package and check whether any of the files on your system differ from the ones in the package:
$ sudo apt install debsums $ debsums -e isc-dhcp-server You may also want to check that your systemd unit is the expected one, by running the following command and attaching the resulting file: systemctl show isc-dhcp-server > isc-dhcp-server-systemctl.txt -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1186662 Title: isc-dhcp-server fails to renew lease file Status in isc-dhcp package in Ubuntu: Fix Released Status in isc-dhcp source package in Trusty: Triaged Bug description: After raring upgrade, the dhcp server fails to renew lease file when it tries to (about every hour). The syslog says: dhcpd: Can't create new lease file: Permission denied It looks like a permission problem, because # chown -R dhcpd:dhcpd /var/lib/dhcp the above command temporarily solves the issue, until dhcpd is restarted: at that time, the ownership of the directory and the lease file is set back to root:root. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1186662/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp