How to check DNS lookup in Linux?
In this article we will look at different ways to check the DNS lookup results from a Linux system.
This is an easy method that you can use to verify what type of DNS resolution server your machine is using.
You can use the following methods for checking DNS lookup results. 1) Using nslookup command. 2) Netstat. 3) dig command. 4) Ifconfig command. Before you start, let us know what type of DNS you are using. Which type of DNS server do you have? If you want to use Google public DNS 8.8 and 8.4)4, you can add them in your /etc/resolv.conf file.
# Google public DNS 8.8 # Google public DNS 8.4)4 nameserver 8.8 nameserver 8.4)4
If you want to use OpenDNS public DNS then you can add it to /etc/resolv.conf file as well.
Nameserver 208.67.222 # OpenDNS public DNS 208.222
Let us look at how to check DNS lookup results using these commands in Linux. Using the nslookup command you can display the DNS server you are currently using. To view the DNS server that is in use on your system type the following command.com Server: 192.168.100.4 Address: 192.com: NXDOMAIN
When you see the above result it means that the nslookup is unable to find a domain name google. If the nslookup command shows the search domain, it will search for the domain and display the result.
Type the following command to look for the IP address of the website Google.com The output would be similar to the following one. Server: www.com Address: 74.125.136.104#53 Name: www.
How to use nslookup command in Linux?
I have recently learned about nslookup command and how it is used to resolve the hostname of the IP address.
As the same I wanted to try it in Linux. In case if you are not aware, you can check out the output of nslookup command using this command :
Nslookup www.google.com
The output of the above command on Linux will look like the following: nslookup: can't resolve www.com: NXDOMAIN The Linux's version of nslookup uses a local DNS resolver by default. That means we need to install a local DNS server and also we need to specify the IP address that we want to resolve.
To check the availability of local DNS server we can type in the following command: cat /etc/resolv.conf The output will look like the following: The file /etc/resolv.conf contains our network configuration information. You can add your own nameserver address here and that name server will be responsible for resolving the names.
Now that we know how to check the availability of local DNS servers in Linux. It is time to configure the local DNS server. In this article we will check our local DNS server configuration using the command cat /etc/resolv.
If the contents of /etc/resolv.conf looks like the following then everything is working fine: So as you can see in the above example there is an entry for localhost that is using the local DNS server we specified in /etc/resolv. The nameserver entry is provided by the local DNS server and not by the DHCP server.
There are times when we need to use the DNS server of the Internet for resolv.conf file or else the nameserver address provided by the DHCP server. To do so we need to add nameserver entries in /etc/resolv. In the following example we will use the external DNS server 8.8 and the local DNS server ip-172-31-29-129.internal.mydomain.conf
# Generated by resolvconf (1.82.12) package. DO NOT EDIT THIS FILE.
How to check domain name in Linux command?
I want to know if my domain name is in use or not.
How to check that in Linux command? I know there is ping option, but I don't want to use that because it will send a packet through the network. Is there any command for that? You can use the dig command. By sending an initial query to that DNS server, the command tells the DNS software how to find out the IP address for the. name yourdomainname. This IP address is then used by the dig command to get the corresponding A or AAAA record. If the DNS software returns a negative answer, it means that the domain name is. not registered with this DNS server. If the DNS software returns a positive answer, it means that the domain name is registered, and that. the IP address for the name is youripaddress. The dig command can also find out how long a name has been registered by checking the. serial number in the SOA record (see below).google.com
; <<>> DiG 9.8.3-P1 <<>> www. IN A
;; ANSWER SECTION:
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