mkargar@musa:~$ sudo mythbackend
[sudo] password for mkargar:
2008-03-10 04:28:23.026 Using runtime prefix = /usr, libdir = /usr/lib
2008-03-10 04:28:23.027 Empty LocalHostName.
2008-03-10 04:28:23.028 Using localhost value of musa
2008-03-10 04:28:23.063 New DB connection, total: 1
2008-03-10 04:28:23.093 Connected to database 'mythconverg' at host: localhost
2008-03-10 04:28:23.095 Closing DB connection named 'DBManager0'
2008-03-10 04:28:23.096 Connected to database 'mythconverg' at host: localhost
2008-03-10 04:28:23.099 New DB connection, total: 2
2008-03-10 04:28:23.099 Connected to database 'mythconverg' at host: localhost
2008-03-10 04:28:23.102 Current Schema Version: 1214
Starting up as the master server.
ERROR: no valid capture cards are defined in the database.
Perhaps you should read the installation instructions?
QServerSocket: failed to bind or listen to the socket
2008-03-10 04:28:23.113 New DB connection, total: 3
2008-03-10 04:28:23.114 Connected to database 'mythconverg' at host: localhost
2008-03-10 04:28:23.119 MediaServer::HttpServer Create Error
2008-03-10 04:28:23.120 mythbackend version: 0.21.20080304-1 www.mythtv.org
2008-03-10 04:28:23.120 Enabled verbose msgs:  important general
2008-03-10 04:28:23.122 AutoExpire: CalcParams(): Max required Free Space: 1.0 GB w/freq: 15 min
QServerSocket: failed to bind or listen to the socket
2008-03-10 04:28:23.124 Failed to bind port 6543. Exiting.
mkargar@musa:~$