Restart Network without Rebooting Kodi

Is it possible to restart the network from SSH session without rebooting?
The reason is I have a lot of stale tcp sessions , output from
ss -t

ESTAB        0        0          192.168.254.8:ssh         192.168.254.7:38248  
CLOSE-WAIT   64       0          192.168.254.8:46444       13.224.217.27:https  
CLOSE-WAIT   1        0          192.168.254.8:36136       93.187.10.106:http   
CLOSE-WAIT   32       0          192.168.254.8:40414          37.48.83.5:https  

Some of these have been here for a few days.
The easy way is to reboot, just wonder if I can log in via SSH and use

sudo service network-manager reboot

I know network is a bit different on OSMC.
Running Leia 18.9 on Rasberry Pi 2.

Can try
sudo systemctl restart connman
or
ifconfig eth0 down && ifconfig eth0 up