I am having the same problem on Ubuntu 18.04. It was working on both 16 and 18 until recently.
root@T550:~# systemctl status saned.socket
● saned.socket - saned incoming socket
Loaded: loaded (/lib/systemd/system/saned.socket; enabled; vendor preset: ena
Active: active (listening) since Fri 2019-07-05 00:03:10 BST; 1min 46s ago
Listen: 0.0.0.0:6566 (Stream)
Accepted: 0; Connected: 0
Tasks: 0 (limit: 4915)
CGroup: /system.slice/saned.socket
Jul 05 00:03:10 T550 systemd[1]: Listening on saned incoming socket.
root@T550:~# systemctl start saned
Failed to start saned.service: Unit saned.service is masked.
root@T550:~# service saned start
Failed to start saned.service: Unit saned.service is masked.
root@T550:~#
I am having the same problem on Ubuntu 18.04. It was working on both 16 and 18 until recently.
root@T550:~# systemctl status saned.socket system/ saned.socket; enabled; vendor preset: ena slice/saned. socket
● saned.socket - saned incoming socket
Loaded: loaded (/lib/systemd/
Active: active (listening) since Fri 2019-07-05 00:03:10 BST; 1min 46s ago
Listen: 0.0.0.0:6566 (Stream)
Accepted: 0; Connected: 0
Tasks: 0 (limit: 4915)
CGroup: /system.
Jul 05 00:03:10 T550 systemd[1]: Listening on saned incoming socket.
root@T550:~# systemctl start saned
Failed to start saned.service: Unit saned.service is masked.
root@T550:~# service saned start
Failed to start saned.service: Unit saned.service is masked.
root@T550:~#