[root@cloud-231 ~]# sudo systemctl status nix-daemon
● nix-daemon.service - Nix Daemon
   Loaded: loaded (/nix/var/nix/profiles/default/lib/systemd/system/nix-daemon.service; linked; vendor preset: disabled)
   Active: active (running) since Di 2018-07-03 22:23:09 CEST; 9min ago
 Main PID: 19917 (nix-daemon)
    Tasks: 2
   CGroup: /system.slice/nix-daemon.service
           └─19917 nix-daemon --daemon

Jul 03 22:23:09 cloud-231.rz.tu-clausthal.de systemd[1]: Started Nix Daemon.
Jul 03 22:23:09 cloud-231.rz.tu-clausthal.de systemd[1]: Starting Nix Daemon...
Jul 03 22:23:48 cloud-231.rz.tu-clausthal.de nix-daemon[19917]: accepted connection from pid 20006, user tempuser
[root@cloud-231 ~]# sudo systemctl status nix-daemon.socket
● nix-daemon.socket - Nix Daemon Socket
   Loaded: loaded (/nix/var/nix/profiles/default/lib/systemd/system/nix-daemon.socket; enabled; vendor preset: disabled)
   Active: active (running) since Di 2018-07-03 22:23:08 CEST; 10min ago
   Listen: /nix/var/nix/daemon-socket/socket (Stream)

Jul 03 22:23:08 cloud-231.rz.tu-clausthal.de systemd[1]: Listening on Nix Daemon Socket.
Jul 03 22:23:08 cloud-231.rz.tu-clausthal.de systemd[1]: Starting Nix Daemon Socket.