Как настроить статический IP-адрес в Ubuntu 18.04

Как настроить статический IP-адрес в Ubuntu 18.04
How to restart network on Ubuntu 18.04
How to configure static IP address on Ubuntu 18.04 Bionic Beaver Linux
Ubuntu 18.04: Network configuration
Постоянно отключить NetworkManager

$ ip a
>> inet 192.168.0.53/24 brd 192.168.0.255 scope global dynamic enp0s3


$ cd /etc/netplan/
$ ls
50-cloud-init.yaml
$ sudo cp 50-cloud-init.yaml 50-cloud-init.yaml.bac
$ sudo nano 50-cloud-init.yaml


# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s3:
            addresses: []
            dhcp4: true
    version: 2




Корректируем так:

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    version: 2
    renderer: networkd
    ethernets:
        enp0s3:
            addresses: [192.168.0.53/24,]
            gateway4: 192.168.0.1
            dhcp4: no
            nameservers:
                addresses: [8.8.8.8, 8.8.4.4]

Сохранить.
$ sudo netplan apply
.

Для  десктопа можно настроить через сетевой мененджер.
Или снести сетевой менеджер и настроить вручную, как для сервера.


$ ip a
....................
inet 192.168.0.242/24 brd 192.168.0.255 scope global dynamic noprefixroute enp0s3
....................

$ cd /etc/netplan/
$ ls
01-network-manager-all.yaml
Имя будет разное
$ sudo cp 01-network-manager-all.yaml 01-network-manager-all.yaml.bac

$ sudo nano 01-network-manager-all.yaml
можно удалить и создать свое:
$ sudo nano 01.yaml

Меняем содержимое:

network:
    version: 2
    renderer: networkd
    ethernets:
        enp0s3:
            addresses: [192.168.0.242/24,]
            gateway4: 192.168.0.1
            dhcp4: no
            nameservers:
                addresses: [8.8.8.8, 8.8.4.4]

Сохранить.
$ sudo netplan apply

# отключим сетевой менеджер
$ sudo systemctl stop NetworkManager.service
$ sudo systemctl disable NetworkManager.service
$ sudo systemctl status NetworkManager.service
$ mv /lib/systemd/system/NetworkManager.service /lib/systemd/syste/NetworkManager.service.bak
$ sudo reboot
$ sudo systemctl status NetworkManager.service
Unit NetworkManager.service could not be found.