Debian: Добавить alias через утилиту ifconfig

sudo ifconfig eth0:0 192.168.1.100 netmask 255.255.255.224 up
sudo ifconfig eth0:1 192.168.0.100 up
ifconfig -a
eth0      Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX  
          inet addr:192.168.100.105  Bcast:192.168.100.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:692 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8729 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:60660 (60.6 KB)  TX bytes:1262278 (1.2 MB)
eth0:0    Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX  
          inet addr:192.168.1.100  Bcast:192.168.0.127  Mask:255.255.255.224
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
eth0:1    Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX  
          inet addr:192.168.0.100  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

Создать интерфейс

ifconfig enp0s3:0 10.0.8.2 netmask 255.255.255.0 up

Или создать так

ifconfig enp0s3:1 10.0.7.2 up

Удалить алиас

ifconfig enp0s3:0 down

Добавить в автозагрузку

nano /etc/network/interfaces

auto enp0s3:0

iface enp0s3:0 inet static

address 10.0.8.2

netmask 255.255.255.0

broadcast 10.0.8.255

network 10.0.8.0

auto enp0s3:1

iface enp0s3:1 inet static

address 10.0.7.2

netmask 255.255.255.0

broadcast 10.0.8.255

network 10.0.8.0