osis@projmngsys:~$ sudo systemctl status networking
● networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
  Drop-In: /run/systemd/generator/networking.service.d
           └─50-insserv.conf-$network.conf
   Active: failed (Result: exit-code) since Вт 2019-06-18 20:25:45 MSK; 14min ago
     Docs: man:interfaces(5)
  Process: 794 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
  Process: 778 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --lis
 Main PID: 794 (code=exited, status=1/FAILURE)

июн 18 20:25:44 projmngsys systemd[1]: Starting Raise network interfaces...
июн 18 20:25:45 projmngsys ifup[794]: RTNETLINK answers: File exists
июн 18 20:25:45 projmngsys ifup[794]: Failed to bring up eth0.
июн 18 20:25:45 projmngsys systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
июн 18 20:25:45 projmngsys systemd[1]: Failed to start Raise network interfaces.
июн 18 20:25:45 projmngsys systemd[1]: networking.service: Unit entered failed state.
июн 18 20:25:45 projmngsys systemd[1]: networking.service: Failed with result 'exit-code'.

[2]+  Stopped                 sudo systemctl status networking

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface

auto eth0
iface eth0 inet static
address 192.168.1.69
#netmask 255.255.0.0
#gateway 192.168.1.254
#dns-nameservers 8.8.8.8 8.8.4.4 192.168.1.254
#dns-search google.com

osis@projmngsys:~$ ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 00:15:5d:64:26:04 brd ff:ff:ff:ff:ff:ff

osis@projmngsys:~$ sudo lshw -C network | grep name
       logical name: eth0

osis@projmngsys:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:15:5d:64:26:04
          inet addr:192.168.1.69  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: 2a00:1370:8125:dfcc:215:5dff:fe64:2604/64 Scope:Global
          inet6 addr: fda5:efaf:2260:1:215:5dff:fe64:2604/64 Scope:Global
          inet6 addr: fe80::215:5dff:fe64:2604/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7082 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4055 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1053006 (1.0 MB)  TX bytes:4096922 (4.0 MB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:203528 errors:0 dropped:0 overruns:0 frame:0
          TX packets:203528 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:180782039 (180.7 MB)  TX bytes:180782039 (180.7 MB)

osis@projmngsys:~$ sudo nano /etc/hosts
127.0.0.1       localhost

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters