Since this morning the network is unreachable Ubuntu 18:04

This morning the networking in my Ubuntu 18.04 Server Edition is not working anymore :

marco@pc01:$   sudo lshw -class network   *-network DISABLED       description: Ethernet interface       product: RTL8111/8168/8411 PCI Express          Gigabit Ethernet Controller   *-network DISABLED       description: Wireles interface       product: AR9227 Wireless Network Adapter   *-network:0        description: Ethernet interface        physical id: 2        logical name : docker0   *-network:1        description: Ethernet interface        physical id: 3 

sudo nano /etc/nework/interfaces :

iface eth0 inet static     address     netmask     network      broadcast     post-up iptables-restore <         /etc/iptables.up.rules     gateway     dns-nameservers 

Even with sudo /etc/init.d/networking restart:

marco@pc01:$   sudo /etc/init.d/networking restart [ok] Restarting networking (via systemctl):  networking.service  marco@pc01:$   ping  connect: Network is unreachable 

What have I to do in order to make the network available again? Looking forward to your kind help Marco