DNS (Area Identify System) is the phonebook of the web. A Area identify is a novel alphanumeric handle that customers kind within the URL bar within the browser as a way to entry an internet site.
Domains allow customers to entry an internet site as an alternative of utilizing an IP handle that maps onto each area identify. Typically, it’s possible you’ll encounter DNS points resembling a misconfigured DNS server which could result in downtime.
On this information, we have a look at 4 instruments you may leverage to troubleshoot DNS Identify decision issues in Linux.
1. Nslookup Command
The nice previous nslookup command has been round for some time. It’s a command-line device that queries and offers detailed details about the web area identify servers.
You’d usually use the nslookup device to acquire DNS data of a website identify such because the mapping between a website identify and its related IP handle. The data obtained from querying a DNS file is efficacious in troubleshooting DNS-related points.
To retrieve details about a DNS file, use the next syntax:
$ nslookup domain_name
For instance, to examine the DNS file of a website referred to as linuxtechwhiz.information, run the command:
$ nslookup linuxtechwhiz.information
If all the things is okay, it is best to get output that resembles what now we have right here.
The primary part shows details about the server used to acquire the DNS data. On this case, it’s the native DNS server on my native community. Typically, this may be your router or an inner company server.
The second part shows the Absolutely Certified Area identify and its corresponding IP handle (Each IPv4 and IPv6). In some instances, like ours, IPv4 is the one lively protocol.
For some domains, each protocols are enabled. For instance, in the event you question google.com, you discover that the area identify maps to a number of IP addresses, each IPv4 and IPv6.
$ nslookup google.com
2. dig Command
Quick for Area Info Groper, dig is yet one more command-line device for querying Area Identify System (DNS) identify servers. It’s a greater DNS question device and changed the nslookup command.
The dig command permits you to carry out DNS lookups and supply intricate particulars about varied DNS data together with A, MX, and SOA data.
Essentially the most simple approach of probing a DNS file is by typing the dig command adopted by the area identify and urgent ENTER.
$ dig linuxtechwhiz.information
The output of the dig command is sort of verbose. To show the IP handle mapping embody the +brief suffix as proven.
$ dig linuxtechwhiz.information +brief 74.207.227.36
The command-line instruments that now we have simply checked out solely present restricted details about your DNS data and can’t adequately be used to troubleshoot complicated DNS points.
3. MXToolBox
MXToolBox is a free on-line device (paid for further options) that gives quick and correct community diagnostic and DNS lookup instruments.
It offers you with a complete outlook of your area well being, which incorporates monitoring your area, displaying details about any DNS or IP blacklists, probing the e-mail server for any points, checking the net server, and operating over 15 checks in your DNS server.
It’s a extremely advisable device in case your sole objective is to resolve any DNS-related challenge.
4. IntoDNS
IntoDNS is one other helpful device that you should utilize to examine and troubleshoot any DNS-related points. In just some seconds, it generates an in depth report about NS data, nameservers, SOA and MX data, TTL, refresh interval, and way more.
As well as, it offers details about mail servers’ IP handle and their validity and any doable drawback along with your area identify.
Closing Ideas
These are just some instruments that present insights into your DNS data which come in useful in troubleshooting any faults or errors related along with your area. We hope you discovered this information insightful. Be happy to succeed in out with any feedback or suggestions.
If You Respect What We Do Right here On TecMint, You Ought to Contemplate:
TecMint is the quickest rising and most trusted group website for any sort of Linux Articles, Guides and Books on the internet. Hundreds of thousands of individuals go to TecMint! to go looking or browse the hundreds of printed articles obtainable FREELY to all.
If you happen to like what you’re studying, please contemplate shopping for us a espresso ( or 2 ) as a token of appreciation.
We’re grateful in your by no means ending assist.
