bind9 enable logging for dns query everything

1.modify /etc/bind/named.conf.options
#vim /etc/bind/named.conf.options

logging{
channel dns_log {
file "/var/log/named/bind.log" versions 3 size 5m;
severity info;
print-time yes;
print-severity yes;
print-category yes;
};
category lame-servers{
null;
};
category default{
dns_log;
};
category xfer-out{
dns_log;
};
category queries{
dns_log;
};
};

2.make a folder name named in /var/log and give bind write permission
#cd /var/log
#mkdir named
#cd named
#touch bind.log
#cd ../..
#chown bind:bind -Rf named/
#chmod 775 -Rf named/

3.restart bind service
#/etc/init.d/bind9 restart