Logging with isc bind 9

example 1

...
logging{
   channel queries_log{
      file "/var/log/named/queries.log" versions 10 size 20m;
      severity debug 1;
      print-severity yes;
      print-time yes;
      print-category yes;
   };
   channel debug_log{
      file "/var/log/named/debug.log" versions 10 size 20m;
      severity debug 1;
      print-severity yes;
      print-time yes;
      print-category yes;
   };
   channel other_log{
      file "/var/log/named/other.log" versions 10 size 20m;
      severity debug 1;
      print-severity yes;
      print-time yes;
      print-category yes;
   };
   category default { debug_log; };
   category queries { queries_log; };
   category client { other_log; };
   category config { other_log; };
   category delegation-only { other_log; };
   category database { other_log; };
   category dispatch { other_log; };
   category dnssec { other_log; };
   category general { other_log; };
   category lame-servers { other_log; };
   category security { other_log; };
   category xfer-in { other_log; };
   category xfer-out { other_log; };
};