Tested that on a "broken" environment (after a reboot with a broken package):
root@maas-xenial3:~# apt install ubuntu-fan Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be upgraded: ubuntu-fan 1 upgraded, 0 newly installed, 0 to remove and 94 not upgraded. Need to get 36.4 kB of archives. After this operation, 0 B of additional disk space will be used. Get:1 http://ppa.launchpad.net/canonical-kernel-team/fan-fixes/ubuntu xenial/main amd64 ubuntu-fan all 0.12.8~16.04.2~rc1 [36.4 kB] Fetched 36.4 kB in 0s (0 B/s) (Reading database ... 60144 files and directories currently installed.) Preparing to unpack .../ubuntu-fan_0.12.8~16.04.2~rc1_all.deb ... Unpacking ubuntu-fan (0.12.8~16.04.2~rc1) over (0.12.8~16.04.1) ... Processing triggers for systemd (229-4ubuntu19) ... Processing triggers for ureadahead (0.100.0-19) ... Processing triggers for man-db (2.7.5-1) ... Setting up ubuntu-fan (0.12.8~16.04.2~rc1) ... # after a reboot with a broken package an address was present but the interface was not considered as "configured" by ifupdown - had to manually delete an address to avoid RTNETLINK answers: File exists on ifup root@maas-xenial3:~# ip a d 10.10.101.104/24 dev ens3 root@maas-xenial3:~# ifdown ens3 ifdown: interface ens3 not configured root@maas-xenial3:~# ifup ens3 root@maas-xenial3:~# ip a s 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 52:54:00:82:7d:16 brd ff:ff:ff:ff:ff:ff inet 10.10.101.104/24 brd 10.10.101.255 scope global ens3 valid_lft forever preferred_lft forever inet6 fe80::5054:ff:fe82:7d16/64 scope link valid_lft forever preferred_lft forever # all good root@maas-xenial3:~# ifdown -a root@maas-xenial3:~# ifup -a -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1737640 Title: /usr/sbin/fanctl: arithmetic expression: expecting primary | unconfigured interfaces cause ifup failures To manage notifications about this bug go to: https://bugs.launchpad.net/juju/+bug/1737640/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
