Got a fresh new install of Ubuntu Server 16.04. After installation network connectivity was fine.
I then installed QuickBox.
After the installation it was still fine; I could SSH in and out no problem. The QuickBox installation however recommended I restart the server for some files to finish installation.
After restarting the server I lost all network connectivity; I continued getting the error:
RTNETLINK answers: File Exists Failed to bring up eno1
The interfaces file looked fine, had the correct networking information. No duplicate gateways were set in interfaces configuration either.
I ran the following command to get some feedback and got this:
sudo ifdown eno1 && sudo ifup -v eno1 ifdown: interface eno1 not configured configuring interface eno1=eno1 (inet) /bin/run-parts --exit-on-error --verbose /etc/network/if-pre-up.d run-parts: executing /etc/network/if-pre-up.d/ethtool run-parts: executing /etc/network/if-pre-up.d/ifenslave * [ inet = meta ] * IF_BOND_SLAVES= *  *  * [ -z ] *exit run-parts: executing /etc/network/if-pre-up.d/vlan /bin/ip addr add 216.176.200.X/255.255.255.X broadcast 216.176.200.X RTNETLINK answers: File exists Failed to bring up eno1.
I tried flushing the device as well that didnt work. I tried restart networking service, still fails. There are no extra configs in interfaces.d directory.
My interfaces file looks like this:
iface eno1 inet static address 216.176.200.X netmask 255.255.255.X network 216.176.200.X broadcast 216.176.200.X gateway 216.176.200.X # dns-* options are implemented by the resolvconf package, if installed dns-nameservers 209.151.232.X 209.151.224.X dns-search domain.xyz
Also when I do a “route -n” nothing comes up in the kernel routing table, its just completely blank.
Same thing when I run a “netstat -rn”; the routing table is completely blank.
Is it the routing table? I tried adding the routing info manually but I still got the same error.
I flushed the device as well and tried again and that didn’t work either.
What is this RTNETLINK? I googled around and tried all the previous solutions people posted but none of them worked and still couldn’t find a straight answer as to what this file is.