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Ubuntu 20


## Ubuntu 20 uses netplan to manager network.  With 2 different possible backends
## (1) networkd  (2) NetworkManager
## main config file is in /etc/netplan/*.yaml
## Default install will use NetworkManager as the render and have the following

cat /etc/netplan/01-network-manager-all.yaml

(command output)
# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager


## Identity the interface names with

ip link show

(sample command output)
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 08:00:27:86:70:df brd ff:ff:ff:ff:ff:ff
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 08:00:27:ef:af:c2 brd ff:ff:ff:ff:ff:ff
4: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 08:00:27:3e:c4:90 brd ff:ff:ff:ff:ff:ff


## in this example we have interfaces enp0s3, enp0s8, enp0s9


Using netplan


## create the netplan config file for networkd

sudo vi /etc/netplan/01-networkd-all.yaml


## Create the file as follows




## restart the network

sudo netplan apply




Using NetworkManager


## create the netplan config file for networkd

sudo vi /etc/netplan/01-NetworkManager-all.yaml


## Create the file as follows




## restart the network

sudo netplan apply