Linux简明系统维护手册内容解说

boot=/dev/sda
map=/boot/map
install=/boot/boot.b
prompt
timeout=50
lba32
default=linux-2.5.7

image=/boot/vmlinuz
    label=linux
    initrd=/boot/initrd
    read-only
    root=/dev/sda5
image=/boot/vmlinuz-2.5.7
    label=linux-2.5.7
    initrd=/boot/initrd
    read-only
    root=/dev/sda5

/*
 * This is a worthless, nonrunnable example of a named.conf file that has
 * every conceivable syntax element in use. We use it to test the parser.
 * It could also be used as a conceptual template for users of new features.
 */

/*
 * C-style comments are OK
 */

// So are C++-style comments

# So are shell-style comments

// watch out for ";" -- it's important!

options {
    directory "/var/named";         
// use current directory
    named-xfer "/usr/libexec/named-xfer";  
// _PATH_XFER
    dump-file "named_dump.db";       
// _PATH_DUMPFILE
   pid-file "/var/run/named.pid";     
 // _PATH_PIDFILE
   statistics-file "named.stats";     
// _PATH_STATS
   memstatistics-file "named.memstats";   
// _PATH_MEMSTATS
   check-names master fail;
   check-names slave warn;
   check-names response ignore;
   host-statistics no;
   deallocate-on-exit no;         
// Painstakingly deallocate all
// objects when exiting instead of
// letting the OS clean up for us.
// Useful a memory leak is suspected.
      // Final statistics are written to the
      // memstatistics-file.
   datasize default;
   stacksize default;
   coresize default;
   files unlimited;
   recursion yes;
   fetch-glue yes;
   fake-iquery no;
   notify yes;  
 // send NOTIFY messages. You can set
     // notify on a zone-by-zone
     // basis in the "zone" statement
     // see (below)
   serial-queries 4;        
 // number of parallel SOA queries
     // we can have outstanding for master
     // zone change testing purposes
   auth-nxdomain yes;       
     // always set AA on NXDOMAIN.
     // don't set this to 'no' unless
     // you know what you're doing -- older
     // servers won't like it.
   multiple-cnames no;       
   // if yes, then a name my have more
    // than one CNAME RR. This use
    // is non-standard and is not
    // recommended, but it is available
    // because previous releases supported
    // it and it was used by large sites
    // for load balancing.
   allow-query { any; };
   allow-transfer { any; };
   transfers-in 10;        
 // DEFAULT_XFERS_RUNNING, cannot be
   // set > than MAX_XFERS_RUNNING (20)
   transfers-per-ns 2;       
     // DEFAULT_XFERS_PER_NS
   transfers-out 0;        
    // not implemented
   max-transfer-time-in 120;   
    // MAX_XFER_TIME; the default number
    // of minutes an inbound zone transfer
    // may run. May be set on a per-zone
    // basis.
   transfer-format one-answer;
   query-source address * port *;
/*
   * The "forward" option is only meaningful if you've defined
   * forwarders. "first" gives the normal BIND
   * forwarding behavior, i.e. ask the forwarders first, and if that
   * doesn't work then do the full lookup. You can also say
   * "forward only;" which is what used to be specified with
   * "slave" or "options forward-only". "only" will never attempt
 * a full lookup; only the forwarders will be used.
 */
  forward first;
  forwarders { };        
// default is no forwarders
   topology { localhost; localnets; };   
// prefer local nameservers
   listen-on port 53 { any; };   
// listen for queries on port 53 on
  // any interface on the system
  // (i.e. all interfaces). The
  // "port 53" is optional; if you
  // don't specify a port, port 53
  // is assumed.
  /*
   * Interval Timers
   */
  cleaning-interval 60;     
 // clean the cache of expired RRs
  // every 'cleaning-interval' minutes
  interface-interval 60;     
// scan for new or deleted interfaces
  // every 'interface-interval' minutes
  statistics-interval 60;     
// log statistics every 
  // 'statistics-interval' minutes
  maintain-ixfr-base no;  
// If yes, keep transaction log file for IXFR
  max-ixfr-log-size 20;    
// Not implemented, maximum size the 
  // IXFR transaction log file to grow
};

/*
 * Control listeners, for "ndc". Every nameserver needs at least one.
 */
controls {
    inet * port 52 allow { any; };
       // a bad idea
    unix "/var/run/ndc" perm 0600 owner 0 group 0; 
 // the default
};

zone "rd.xxx.com" in {
    type master;          
// what used to be called "primary" 
    file "rd.xxx.com.db";
    check-names fail;
    allow-update { none; };
    allow-transfer { any; };
    allow-query { any; };
    // notify yes;         
// send NOTIFY messages for this
      // zone? The global option is used
      // if "notify" is not specified
      // here.
    also-notify { };        
// don't notify any nameservers other
      // than those on the NS list for this
      // zone
};

zone "223.99.211.in-addr.arpa" in {
    type master;     
      // what used to be called "secondary" 
    file "21.9.22.db";
    };

zone "0.0.127.in-addr.arpa" in {
    type master;
    file "127.0.0.db";
};

zone "." in {
    type hint;           
 // used to be specified w/ "cache"
    file "named.root";
};

logging {
    /*
     * All log output goes to one or more "channels"; you can make as
     * many of them as you want.
     */

   channel syslog_errors {     
// this channel will send errors or
    syslog user;      
// or worse to syslog (user facility)
    severity error;
   };

  category parser {
    syslog_errors;
     // you can log to as many channels
    default_syslog;   
 // as you want
  };

  category lame-servers { null; };    
 // don't log these at all

  channel moderate_debug {
    severity debug 3;       
 // level 3 debugging to file
    file "foo";           
 // foo
    print-time yes;         
// timestamp log entries
    print-category yes;      
 // print category name
    print-severity yes;       
 // print severity level
     /*
     * Note that debugging must have been turned on either
     * on the command line or with a signal to get debugging
     * output (non-debugging output will still be written to
     * this channel).
     */
    };

  /*
   * If you don't want to see "zone XXXX loaded" messages but do
   * want to see any problems, you could do the following.
   */

  channel no_info_messages {
      syslog;
      severity notice;
  };

  category load { no_info_messages; };

  /*
   * You can also define category "default"; it gets used when no
   * "category" statement has been given for a category.
   */
 
  category default {
     default_syslog;
     moderate_debug;
  };

};

;Authoriative data for rd.xxx.com
;
$TTL 3600
@ IN SOA compaq.rd.xxx.com. tandongyu.rd.xxx.com. (
20020101    ;Serial
3600      ;Refresh 1 hour
900       ;Retry 15 mins
604800     ;Expire 7 days
86400)     ;Mini 24 hours
;Name server NS records
@ IN  NS   compaq.rd.xxx.com.
;Mail Exchange (MX) records
rd.xxx.com.  IN MX   0    compaq
;Address (A) records.
localhost    IN   A    127.0.0.1
compaq     IN   A    21.9.22.9
tls65      IN   A    21.9.22.8
fbsd      IN   A    21.9.22.7

;
;
$TTL 3600
@ IN SOA compaq.rd.xxx.com.     tandongyu.rd.xxx.com. (
20020101    ;Serial
3600      ;Refresh
900       ;Retry 15 mins
604800     ;Expire 7 days
86400)     ;Mini 24 hours
;NameServer (NS) records
@    IN   NS   compaq.rd.xxx.com.
;Address Point to Name (PTR) records
9    IN   PTR   compaq.rd.xxx.com.
8    IN   PTR   tls65.rd.xxx.com.
7    IN   PTR   fbsd.rd.xxx.com.

; 0.0.127.in-addr.arpa
$TTL 3600
@  IN  SOA   compaq.rd.xxx.com. tandongyu.rd.xxx.com. (
 20020101;serial
     3600  ;refresh
     1800  ;retry
     604800 ;expiration
     3600 ) ;minimum
  IN   NS   compaq.rd.xxx.com.
1    IN   PTR   localhost.

;    This file holds the information on root name servers needed to
;    initialize cache of Internet domain name servers
;    (e.g. reference this file in the "cache . "
;    configuration file of BIND domain name servers).
;
;  This file is made available by InterNIC registration services
;  under anonymous FTP as
;  file        /domain/named.root
;  on server      FTP.RS.INTERNIC.NET
;    -OR- under Gopher at  RS.INTERNIC.NET
;      under menu     InterNIC Registration Services (NSI)
;       submenu     InterNIC Registration Archives
;      file        named.root
;
;    last update:  Aug 22, 1997
;    related version of root zone:  1997082200
;
;
; formerly NS.INTERNIC.NET
;
.            3600000 IN NS  A.ROOT-SERVERS.NET.
A.ROOT-SERVERS.NET.   3600000   A   198.41.0.4
;
; formerly NS1.ISI.EDU
;
.            3600000   NS  B.ROOT-SERVERS.NET.
B.ROOT-SERVERS.NET.   3600000   A   128.9.0.107
;
; formerly C.PSI.NET
;
.            3600000   NS  C.ROOT-SERVERS.NET.
C.ROOT-SERVERS.NET.   3600000   A   192.33.4.12
;
; formerly TERP.UMD.EDU
;
.            3600000   NS  D.ROOT-SERVERS.NET.
D.ROOT-SERVERS.NET.   3600000   A   128.8.10.90
;
; formerly NS.NASA.GOV
;
.            3600000   NS  E.ROOT-SERVERS.NET.
E.ROOT-SERVERS.NET.   3600000   A   192.203.230.10
;
; formerly NS.ISC.ORG
;
.            3600000   NS  F.ROOT-SERVERS.NET.
F.ROOT-SERVERS.NET.   3600000   A   192.5.5.241
;
; formerly NS.NIC.DDN.MIL
;
.            3600000   NS  G.ROOT-SERVERS.NET.
G.ROOT-SERVERS.NET.   3600000   A   192.112.36.4
;
; formerly AOS.ARL.ARMY.MIL
;
.            3600000   NS  H.ROOT-SERVERS.NET.
H.ROOT-SERVERS.NET.   3600000   A   128.63.2.53
;
; formerly NIC.NORDU.NET
;
.            3600000   NS  I.ROOT-SERVERS.NET.
I.ROOT-SERVERS.NET.   3600000   A   192.36.148.17
;
; temporarily housed at NSI (InterNIC)
;
.            3600000   NS  J.ROOT-SERVERS.NET.
J.ROOT-SERVERS.NET.   3600000   A   198.41.0.10
;
; housed in LINX, operated by RIPE NCC
;
.            3600000   NS  K.ROOT-SERVERS.NET.
K.ROOT-SERVERS.NET.   3600000   A   193.0.14.129 
;
; temporarily housed at ISI (IANA)
;
.            3600000   NS  L.ROOT-SERVERS.NET.
L.ROOT-SERVERS.NET.   3600000   A   198.32.64.12
;
; housed in Japan, operated by WIDE
;
.            3600000   NS  M.ROOT-SERVERS.NET.
M.ROOT-SERVERS.NET.   3600000   A   202.12.27.33
; End of File