Cloud Computing Learning Route course outline Courseware: client query
Cloud Computing Learning Route course outline Courseware client query:
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Nslookup,host,dig
The client specifies a local DNS
[root@tianyun ~] # cat / etc/resolv.conf
Nameserver 192.168.2.115
[root@tianyun ~] # dig www.baidu.com
[root@tianyun ~] # nslookup www.baidu.com
[root@tianyun ~] # host www.baidu.com
Dig (Linux)
[root@tianyun ~] # dig www.126.com / / use the DNS set by / etc/resolv.conf
[root@tianyun ~] # dig @ 192.168.2.168 www.126.com / / use the specified DNS
[root@tianyun ~] # dig @ 192.168.2.100 www.126.com / / use the specified DNS
Host (Linux)
[root@tianyun ~] # host-t A www.baidu.com / / forward parsing, query A record
[root@tianyun ~] # host 192.168.5.100 / / reverse parsing, query PTR records
[root@tianyun ~] # host www.baidu.com 192.168.5.240 / / parsing using DNS server 192.168.5.240
[root@tianyun ~] # host-t SOA baidu.com / / query the SOA of a domain
Baidu.com has SOA record ns.baidu.com. Root.baidu.com. 2013081303 3600 900 604800 86400
[root@tianyun ~] # host-t NS baidu.com / / query the NS of a domain
Baidu.com name server ns.baidu.com.
Baidu.com name server ns2.baidu.com.
[root@tianyun ~] #
[root@tianyun ~] # host-t MX baidu.com / / query the mail server of a domain
Baidu.com mail is handled by 10 mail.baidu.com.
Nslookup (Linux/Windows)
[root@tianyun ~] # nslookup www.baidu.com
[root@tianyun ~] # nslookup 192.168.5.100
[root@tianyun ~] # nslookup
Www.baidu.com
Server: 127.0.0.1
Address: 127.0.0.1#53
Name: www.baidu.com
Address: 192.168.5.100
192.168.5.2
Server: 127.0.0.1
Address: 127.0.0.1#53
2.5.168.192.in-addr.arpa name = www.baidu.com.
[root@tianyun ~] # nslookup
Server 192.168.5.2 / / resolve using a temporarily specified server
Default server: 192.168.5.2
Address: 192.168.5.2#53
[root@tianyun ~] # nslookup
Set q=soa
Baidu.com
Server: 127.0.0.1
Address: 127.0.0.1#53
Baidu.com
Origin = ns.baidu.com
Mail addr = root.baidu.com
Serial = 2013081303
Refresh = 3600
Retry = 900,
Expire = 604800
Minimum = 86400
Set q=ns
Baidu.com
Server: 127.0.0.1
Address: 127.0.0.1#53
Baidu.com nameserver = ns.baidu.com.
Baidu.com nameserver = ns2.baidu.com.
[root@tianyun ~] # nslookup
Set q=mx
Baidu.com
Server: 127.0.0.1
Address: 127.0.0.1#53
Baidu.com mail exchanger = 10 mail.baidu.com.
Set Qinta
Www.baidu.com
Server: 127.0.0.1
Address: 127.0.0.1#53
Name: www.baidu.com
Address: 192.168.5.100
C:\ > ipconfig /?
