I had to add and extra line to /etc/network/interfaces.d/eth0 before I could get route -n to see a gateway.
So my erth0 now has
auto eth0
iface eth0 inet static
address 192.168.nn.2
netmask 255.255.255.0
gateway 192.168.nn.1
up route add default gw 192.168.nn.1
Where nn is the third dotted quad of the address,
But this maybe isn't related? Dunno, but something has changed in stretch.
I am running xfce for a gui.
Can you open a terminal screen?
Can you sudo -i, entering your login pw to become root?
Cheers, gene83
So my erth0 now has
auto eth0
iface eth0 inet static
address 192.168.nn.2
netmask 255.255.255.0
gateway 192.168.nn.1
up route add default gw 192.168.nn.1
Where nn is the third dotted quad of the address,
But this maybe isn't related? Dunno, but something has changed in stretch.
I am running xfce for a gui.
Can you open a terminal screen?
Can you sudo -i, entering your login pw to become root?
Cheers, gene83