i am new in bigbluebutton, installation is prefectly done and no problem will occur, but when i update the ubuntu,the the problem will occur,
developer-dx@developerdx-All-Series:/$ sudo bbb-conf -check
BigBlueButton Server 1.0.0-beta (1040)
Kernel version: 4.4.0-36-generic
Distribution: Ubuntu 16.04.1 LTS (64-bit)
Memory: 3823 MB
/var/www/bigbluebutton/client/conf/config.xml (bbb-client)
Port test (tunnel): 192.168.0.161
Red5: 192.168.0.161
useWebrtcIfAvailable: true
/opt/freeswitch/conf/sip_profiles/external.xml (FreeSWITCH)
websocket port: 5066
WebRTC enabled: true
/etc/nginx/sites-available/bigbluebutton (nginx)
server name: 192.168.0.161
port: 80
bbb-client dir: /home/developer-dx/dev/bigbluebutton/bigbluebutton-client
/var/lib/tomcat7/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties (bbb-web)
bbb-web host: 192.168.0.161
/var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp (API demos)
url: 192.168.0.161
/var/www/bigbluebutton/check/conf/config.xml (client check)
client check: 192.168.0.161
/usr/share/red5/webapps/bigbluebutton/WEB-INF/red5-web.xml (red5)
voice conference: FreeSWITCH
capture video: true
capture desktop: true
/usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)
playback host: 192.168.0.161
** Potential problems described below **
# Not Running: red5
# Warning: nginx is not serving the client from /var/www/bigbluebutton/.
# Instead, it's being served from
#
# /home/developer-dx/dev/bigbluebutton/bigbluebutton-client
#
# (This is OK if you have setup a development environment.)
# Unavailable Red5 logs (/usr/share/red5/log): bigbluebutton.log red5.log sip.log video.log deskshare.log
# /usr/share/red5/log/sip.log not found
# /usr/share/red5/log/video.log not found
# /usr/share/red5/log/bigbluebutton.log not found
# /usr/share/red5/log/deskshare.log not found
# Warning: The installed ffmpeg version 'N-80901-gfebc862
--prefix=/opt/ffmpeg' is not supported
# Recording processing may not function correctly
# Error: /usr/share/red5/log/sip.log
# No /usr/share/red5/log/bigbluebutton.log
# Error: Unable to connect to port 1935 (RTMP) on 192.168.0.161
# Error: Unable to connect to port 9123 (desktop sharing) on 192.168.0.161
# Warning: You are running BigBlueButton on a server with less than 4G of memory. Your
# performance may suffer.
# Warning: The API demos are installed and accessible from:
#
#
# These API demos allow anyone to access your server without authentication
# to create/manage meetings and recordings. They are for testing purposes only.
# If you are running a production system, remove them by running:
#
# sudo apt-get purge bbb-demo
# Warning: The client self check is installed and accessible from:
#
#
# Error: red5 process ID does not match value in PID file
#
# pid from top:
# /var/run/red5.pid: 6967
#