Ubuntu Neplan Static Ip

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sudo vim /etc/hostname
#modify hostname

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sudo vim /etc/netplan/99_config.yaml
#create first
#existing is 00_installer-config.yaml

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network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s3:
      addresses:
        - 192.168.100.XXX/24
      gateway4: 192.168.100.1
      nameservers:
        addresses: [192.168.100.XXX, 192.168.100.1]

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#delete 00
sudo rm -rf /etc/netplan/00_installer-config.yaml
#neplan apply for new address
sudo netplan apply
#verify
ip a