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Securing-Optimizing-RH-Linux-1_2_243
Comments and suggestions concerning this book should be mailed to gmourani@videotron.ca © Copyright 1999-2000 Gerhard Mourani and Open Network Architecture ® 243 dumpdb stats  trace [level] notrace querylog qrylog help quit ndc> /e DNS Users Tools The commands listed bellows are some that we use often in our regular use but much more exist and you must check the man page and documentation for more details and information. nslookup The nslookup program allows the user to query Internet domain name servers interactively or non-interactively. In interactive mode the user can query name servers for information about various hosts, domains and print a list of hosts in a domain. In non-interactive mode the user can just print the name and request information for a host or domain. Interactive mode has a lot options and commands, it is recommended to see the man page of nslookup or the help under nslookup Interactive mode. · To enter under nslookup Interactive mode, use the command: [root@deep /]# nslookup Default Server:  deep.openarch.com  Address:  208.164.186.1  > help $Id: nslookup.help,v 8.4 1996/10/25 18:09:41 vixie Exp $ Commands: (identifiers are shown in uppercase, [] means optional) NAME - print info about the host/domain NAME using default server NAME1 NAME2 - as above, but use NAME2 as server help or ? - print info on common commands; see nslookup(1) for details set OPTION - set an option     all - print options, current server and host     [no]debug - print debugging information     [no]d2 - print exhaustive debugging information · To run in non-interactive mode, use the command: [root@deep /]# nslookup www.redhat.com Server:  deep.openarch.com Address:  208.164.186.1  Non-authoritative answer: Name:    www.portal.redhat.com  Addresses:  206.132.41.202, 206.132.41.203 Aliases:  www.redhat.com  Where <www.redhat.com> is the host name or Internet address of the name server to be looked up. dnsquery The dnsquery program query domain name servers via the resolver library calls “/etc/resolv.conf”.