$ network-manager.nmcli c modify "netplan-eth1" 802-3-ethernet.wake-on-lan magic
Error: Failed to modify connection 'netplan-eth1': error writing to file '/run/NetworkManager/system-connections/netplan-eth1': Failed to create file '/run/NetworkManager/system-connections/netplan-eth1.3CMMPY': Permission denied




$ dmesg | tail
[ 5855.644076] audit: type=1400 audit(1477298272.347:92): apparmor="DENIED" operation="mknod" profile="snap.network-manager.networkmanager" name="/run/NetworkManager/system-connections/netplan-eth1.3CMMPY" pid=1592 comm="NetworkManager" requested_mask="c" denied_mask="c" fsuid=0 ouid=0