This article objective is to provide that initial IP configuration, etc..

Shell script.

hostname server-1
ifconfig eth0 172.16.1.11 netmask 255.255.255.0 broadcast 172.16.1.255
route add default gw 172.16.1.1 eth0

1. Networking with Linux

Shell script?

# this is a shell script which will be sourced at boot
# if you change the hostname then you need to add a
# /etc/hosts entry as well
# hostname inserthostname_here
# like this:
# echo "127.0.0.1   inserthostname_here" >>/etc/hosts
echo "trex-0" >/etc/hostname
cat <<EOF >/etc/network/interfaces
auto lo
iface lo inet loopback
 
auto eth0
iface eth0 inet static
        hostname trex-0
        address 10.1.1.254
        netmask 255.255.255.0
        gateway 10.1.1.1
        #dns-nameservers 8.8.8.8
EOF
service networking restart

1. Ubuntu Networking
2. Using the TRex Stateless GUI with the TRex Node in CML-P 2

This image uses cloud-init system for initial configuration.

#cloud-config
password: cisco
chpasswd: { expire: False }
hostname: ubuntu-0
ssh_pwauth: True
ssh_authorized_keys:
   - ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBIbn2VyO9Mby6BwkijQmGfH8O2+Uqewn0/oIOXOxMNgCZiztR3v2o5n1l9ET1GuN7iVMe9whoUiNuZMUVEv0INb+A6Yd0M/37tlWlC+qbIjjqL6UzJAqRISdGP1oVmnV2g== wnoguchi@lasthope.pg1x.net
write_files:
- path: /etc/netplan/51-cloud-init_static.yaml
  permissions: '0644'
  content: |
     network:
        version: 2
        ethernets:
           enp0s2:
              match:
                 name: enp0s2
              addresses:
                 - 10.1.1.253/24
              gateway4: 10.1.1.1
              #nameservers:
              #   addresses:
              #      - 8.8.8.8
runcmd:
   - [ sudo, netplan, generate ]
   - [ sudo, netplan, apply ]

1. Ubuntu Networking
2. how do I manually specify IP address to the interfaces of a Ubuntu node in workbench - Edit Config. I couldn't find this info in the documentation.
3. Cloud config examples — cloud-init 20.3 documentation
4. Network Configuration — cloud-init 20.3 documentation