Error in starting BigBlueButton - Unknown Host

[Mohan]

Hi,

After following all the steps (under Step by Step Installation) as provided here : BigBlueButton : Install unable to start the server facing issue of Unknown Host.

More Info: [ COMMAND  Output]

sudo bbb-conf --restart
enp0s8: Unknown host
ifconfig: `--help' gives usage information.

# Warning: Detected FreeSWITCH is using default stun.freeswitch.org server.  See
#
#     http://docs.bigbluebutton.org/2.2/troubleshooting.html#freeswitch-using-default-stun-server
#

Restarting BigBlueButton 2.2.31 ...
Stopping BigBlueButton
Starting BigBlueButton



# Potential problems described below

# Warning: Detected FreeSWITCH is using default stun.freeswitch.org server.  See
#
#     http://docs.bigbluebutton.org/2.2/troubleshooting.html#freeswitch-using-default-stun-server
#

..................
/usr/bin/bbb-conf: line 1287: [: 10.0.2.15: unary operator expected
/usr/bin/bbb-conf: line 1314: [: 10.0.2.15: unary operator expected
/usr/bin/bbb-conf: line 1329: [: 10.0.2.15: unary operator expected
enp0s8: Unknown host
ifconfig: `--help' gives usage information.

#
# Warning: Detected that systemctl does not define a UTF-8 language.
#
# To temporarily correct, run the command
#
#   sudo systemctl set-environment LANG=en_US.UTF-8
#
# See https://docs.bigbluebutton.org/2.2/install.html#pre-installation-checks
#

sudo bbb-conf --check

enp0s8: Unknown host
ifconfig: `--help' gives usage information.

BigBlueButton Server 2.2.31 (2307)
                    Kernel version: 4.15.0-128-generic
                      Distribution: Ubuntu 16.04.7 LTS (64-bit)
                            Memory: 10232 MB
                         CPU cores: 4

/usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties (bbb-web)
       bigbluebutton.web.serverURL: http://10.0.2.15
                defaultGuestPolicy: ALWAYS_ACCEPT
                 svgImagesRequired: true

/etc/nginx/sites-available/bigbluebutton (nginx)
                       server_name: 10.0.2.15
                              port: 80, [::]:80

/opt/freeswitch/etc/freeswitch/vars.xml (FreeSWITCH)
                       local_ip_v4: 10.0.2.15
                   external_rtp_ip: stun:stun.freeswitch.org
                   external_sip_ip: stun:stun.freeswitch.org

/opt/freeswitch/etc/freeswitch/sip_profiles/external.xml (FreeSWITCH)
                        ext-rtp-ip: $${local_ip_v4}
                        ext-sip-ip: $${local_ip_v4}
                        ws-binding: :5066
                       wss-binding: :7443

/usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)
                     playback_host: 10.0.2.15
                 playback_protocol: http
                            ffmpeg: 4.2.4-1ubuntu0.1bbb1~16.04.1

/etc/bigbluebutton/nginx/sip.nginx (sip.nginx)
                        proxy_pass: 10.0.2.15
                          protocol: http

/usr/local/bigbluebutton/bbb-webrtc-sfu/config/default.yml (Kurento SFU)
                        kurento.ip: 10.0.2.15
                       kurento.url: ws://127.0.0.1:8888/kurento
                    kurento.sip_ip: 10.0.2.15
                    localIpAddress: 10.0.2.15
               recordScreenSharing: true
                     recordWebcams: true
                  codec_video_main: VP8
               codec_video_content: VP8

/usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml (HTML5 client)
                             build: 1114
                        kurentoUrl: ws://10.0.2.15/bbb-webrtc-sfu
                  enableListenOnly: true
                    sipjsHackViaWs: false

/usr/share/bbb-web/WEB-INF/classes/spring/turn-stun-servers.xml (STUN Server)
                              stun:stun.l.google.com:19302


# Potential problems described below

# Warning: Detected FreeSWITCH is using default stun.freeswitch.org server.  See
#
#     http://docs.bigbluebutton.org/2.2/troubleshooting.html#freeswitch-using-default-stun-server
#


/usr/bin/bbb-conf: line 1287: [: 10.0.2.15: unary operator expected
/usr/bin/bbb-conf: line 1314: [: 10.0.2.15: unary operator expected
/usr/bin/bbb-conf: line 1329: [: 10.0.2.15: unary operator expected
enp0s8: Unknown host
ifconfig: `--help' gives usage information.

sudo bbb-conf --status

enp0s8: Unknown host
ifconfig: `--help' gives usage information.
nginx —————————————————► [✔ - active]
freeswitch ————————————► [✔ - active]
redis-server ——————————► [✔ - active]
bbb-apps-akka —————————► [✔ - active]
bbb-transcode-akka ————► [✔ - active]
bbb-fsesl-akka ————————► [✔ - active]
red5 ——————————————————► [✔ - active]
mongod ————————————————► [✔ - active]
bbb-html5 —————————————► [✔ - active]
bbb-webrtc-sfu ————————► [✔ - active]
kurento-media-server ——► [✔ - active]
etherpad ——————————————► [✔ - active]
bbb-web ———————————————► [✔ - active]

ifconfig

enp0s3    Link encap:Ethernet  HWaddr 08:00:27:16:d9:b7  
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::b0f7:f9c6:21d1:da15/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1150834 errors:0 dropped:0 overruns:0 frame:0
          TX packets:259331 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1333601458 (1.3 GB)  TX bytes:15983454 (15.9 MB)

enp0s8    Link encap:Ethernet  HWaddr 08:00:27:15:5e:1c  
          inet addr:10.0.0.3  Bcast:10.0.0.255  Mask:255.255.255.0
          inet6 addr: fe80::e348:f246:8976:2f81/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2329 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1482 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:281013 (281.0 KB)  TX bytes:149873 (149.8 KB)

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:35609 errors:0 dropped:0 overruns:0 frame:0
          TX packets:35609 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6190685 (6.1 MB)  TX bytes:6190685 (6.1 MB)

Can you please help me to fix this issue?

Thanks in Advance