Recently I tried to install open nebula and for some reason,the eno1 network interface disappeared from my Ubuntu 20.04 network configuration and I would like to restore it, because now I'm not able to connect to internet. Ubuntu 20.04 uses netplan. This is my 01-network-manager-all.yaml
file:
network:
version: 2
renderer: networkd
ethernets:
eno1:
dhcp4: true
When I do ifconfig
, I see these network interfaces:
docker0 : inet 172.17.0.1 ; netmask 255.255.0.0 ; broadcast 172.17.255.255
minione-nic : no inet ; no netmask ; no broadcast
veth03ad024 : no inet ; no netmask ; no broadcast
virbr0 : inet 192.168.122.1 ; netmask 255.255.255.0 ; broadcast 192.168.122.255
virbr0-nic : no inet ; no netmask ; no broadcast ;
I tried to re-create the old eno1 interface with these commands:
sudo netman apply
sudo systemctl restart network-manager
I don't see any identation error, but the situation is not changed. I have no eno1 interface and no connection to internet. What should I do? what's missing?
NB : this is what happened after having followed the @heynnema's original suggestion:
root@ziomario-I5:/etc/netplan# sudo netplan --debug generate
DEBUG:command generate: running ['/lib/netplan/generate']
** (generate:3712): DEBUG: 22:35:25.392: Processing input file
/etc/netplan/01-network-manager-all.yaml..
** (generate:3712): DEBUG: 22:35:25.392: starting new processing pass
** (generate:3712): DEBUG: 22:35:25.393: We have some netdefs, pass them
through a final round of validation
** (generate:3712): DEBUG: 22:35:25.393: eno1: setting default backend to
2
** (generate:3712): DEBUG: 22:35:25.393: Configuration is valid
** (generate:3712): DEBUG: 22:35:25.393: Generating output files..
** (generate:3712): DEBUG: 22:35:25.393: networkd: definition eno1 is not
for us (backend 2)
(generate:3712): GLib-DEBUG: 22:35:25.393: posix_spawn avoided (fd close
requested)
This is the netplan file that I used (01-network-manager-all.yaml) :
# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
ethernets:
eno1:
dhcp4: true
I have also tried this version:
# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
I tried also:
# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: networkd
ethernets:
eno1:
dhcp4: true
it says: NetworkManager : definition eno1 is not for us (backend 1
)
no eno1 interface has been produced. so it does not work.
root@ziomario-I5:/etc/netplan# sudo lshw -C network
*-network UNCLAIMED
description: Ethernet controller
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list
configuration: latency=0
resources: ioport:d000(size=256) memory:d3804000-d3804fff memory:d3800000-d3803fff
*-network:0
description: Ethernet interface
physical id: 2
logical name: veth91a709d
serial: 96:ae:1d:67:88:d8
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:1
description: Ethernet interface
physical id: 3
logical name: docker0
serial: 02:42:22:9d:a2:14
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.17.0.1 link=yes multicast=yes
*-network:2
description: Ethernet interface
physical id: 4
logical name: virbr0
serial: 52:54:00:6b:98:0e
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=192.168.122.1 link=no multicast=yes
*-network:3 DISABLED
description: Ethernet interface
physical id: 5
logical name: virbr0-nic
serial: 52:54:00:6b:98:0e
size: 10Mbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=no multicast=yes port=twisted pair speed=10Mbit/s
my /etc/network/interfaces file looks like this...
interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
dkms status
:
bbswitch 0.8 ; 5.4.0-40-generic, x86_64 : installed
bbswitch 0.8 ; 5.4.0-41-generic, x86_64 : installed
bbswitch 0.8 ; 5.4.0-42-generic, x86_64 : installed
virtualbox,6.1.10, 5.4.0-40-generic, x86_64 : installed
virtualbox,6.1.10, 5.4.0-41-generic, x86_64 : installed
virtualbox,6.1.10, 5.4.0-42-generic, x86_64 : installed
Partial solution : RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller does not work with kernel 5.4.0-42-generic ; it says that the device is unclaimed. Instead,with the kernel 5.4.0-41-generic it worked perfectly. so this is a bug of that kernel version.
proposed
repo enabled. If that's accurate, then I'll say that's what got you into trouble, and suggest that you disable that repo.Proposed
repo is not fully baked software, and you shouldn't have had to try the -41 and broken -42 kernels. Make sense?proposed
repo risks possibly installing software that breaks your system, as it may not be fully baked software... as it did in your case... that's why it's inproposed
. Usingproposed
repo basically makes you a beta tester.