Setting Up Static IP in Ubuntu

Determining Network Interface Card (NIC) name

sudo lshw -c network

Under the Ethernet Interface copy the logical name.

Finding Netmask

ip a

Against the NIC name you should see a sequence of the format XXX.XXX.XXX.XXX/YY.

Where XXX.XXX.XXX.XXX is the dynamically assigned IP address and YY is the Netmask. Copy the Netmask.

Finding Default Gateway

ip r | grep 'default'

Copy the sequence of the format ZZZ.ZZZ.ZZZ.ZZZ which is the Default Gateway.

Creating Configuration File

cd /etc/netplan

If you already have a file similar to 00-installer-config.yaml modify it else create one.

network:
  version: 2
  ethernets:
    <name>:
      dhcp4: false
      addresses:
        - XXX.XXX.XXX.XXX/YY
      routes:
        - to: default
          via: ZZZ.ZZZ.ZZZ.ZZZ
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

where,

• <name> is your NIC name
• XXX.XXX.XXX.XXX is your Static IP
• YY is your Netmask
• ZZZ.ZZZ.ZZZ.ZZZ is your Default Gateway

Testing and Applying Changes

sudo netplan try

If there are no errors press Enter to apply the changes.

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