linux怎么查看dns

linux查看dns命令1：查看/etc/resolv.con文件

[root@localhost ~]# cat /etc/resolv.conf

nameserver 192.168.xxx.xxx

#search localdomain

[root@localhost ~]#

linux查看dns命令2：使用nslookup命令查看DNS信息

[root@localhost ~]# nslookup 127.0.0.1 | grep Server

Server: 192.168.xxx.xxx

[root@localhost ~]#

linux查看dns命令3：使用dig命令来查看DNS信息

root@localhost ~]# dig

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5 <<>>

;; global options: printcmd

;; Got answer:

;; ->>HEADER<

;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 3

;; QUESTION SECTION:

;. IN NS

;; ANSWER SECTION:

. 86163 IN NS m.root-servers.net.

. 86163 IN NS a.root-servers.net.

. 86163 IN NS j.root-servers.net.

. 86163 IN NS l.root-servers.net.

. 86163 IN NS e.root-servers.net.

. 86163 IN NS d.root-servers.net.

. 86163 IN NS k.root-servers.net.

. 86163 IN NS f.root-servers.net.

. 86163 IN NS h.root-servers.net.

. 86163 IN NS c.root-servers.net.

. 86163 IN NS g.root-servers.net.

. 86163 IN NS b.root-servers.net.

. 86163 IN NS i.root-servers.net.

;; ADDITIONAL SECTION:

a.root-servers.net. 3599 IN A 112.4.20.71

b.root-servers.net. 86163 IN A 192.228.79.201

i.root-servers.net. 86173 IN A 192.36.148.17

;; Query time: 8 msec

;; SERVER: 192.168.xxx.xxx#53(192.168.xxx.xxx)

;; WHEN: Sat Apr 16 07:34:37 2016

;; MSG SIZE rcvd: 289

[root@localhost ~]# dig | grep SERVER: | awk -F# ‘{ print $1 }’ | awk -F: ‘{ print $2 }’

192.168.xxx.xxx

linux查看dns命令4:其它一些方法查看DNS信息

在网上看到还有一些其他方法，查看服务器的DNS配置信息，如下所示，不过这些方法，由于环境限制，我没有验证过，仅供参考。

nm-tool | grep DNS

nmcli dev list iface eth0 | grep IP4