]$ sudo systemctl stop networkmanager.service

Failed to stop networkmanager.service: Unit networkmanager.service not loaded.
$ sudo systemctl disable networkmanager.service
Failed to execute operation: Access denied

$ sudo systemctl enable network.service
network.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig network on

$ sudo systemctl start network.service
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
$ systemctl status network.service

● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2017-06-06 00:05:55 EDT; 26s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2762 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)

Jun 06 00:05:54 localhost.localdomain systemd[1]: Starting LSB: Bring up/down...
Jun 06 00:05:55 localhost.localdomain network[2762]: Bringing up loopback int...
Jun 06 00:05:55 localhost.localdomain network[2762]: Bringing up interface Et...
Jun 06 00:05:55 localhost.localdomain network[2762]: [FAILED]
Jun 06 00:05:55 localhost.localdomain systemd[1]: network.service: control pr...
Jun 06 00:05:55 localhost.localdomain systemd[1]: Failed to start LSB: Bring ...
Jun 06 00:05:55 localhost.localdomain systemd[1]: Unit network.service entere...
Jun 06 00:05:55 localhost.localdomain systemd[1]: network.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

$ systemctl status network.service
● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2017-06-06 00:05:55 EDT; 38s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2762 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)

Jun 06 00:05:54 localhost.localdomain systemd[1]: Starting LSB: Bring up/down networking...
Jun 06 00:05:55 localhost.localdomain network[2762]: Bringing up loopback interface:  [  OK  ]
Jun 06 00:05:55 localhost.localdomain network[2762]: Bringing up interface Ethernet_connection_1:  Error: Connection activation failed: No suitable device found fo...onnection.
Jun 06 00:05:55 localhost.localdomain network[2762]: [FAILED]
Jun 06 00:05:55 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Jun 06 00:05:55 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
Jun 06 00:05:55 localhost.localdomain systemd[1]: Unit network.service entered failed state.
Jun 06 00:05:55 localhost.localdomain systemd[1]: network.service failed.
Hint: Some lines were ellipsized, use -l to show in full.


$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
$ ip route

$ ifconfig

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 256  bytes 22272 (21.7 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 256  bytes 22272 (21.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0