How do I get nslookup on Linux?

What Are the Different nslookup Command Modes?

Nslookup has a slew of different query modes that you can use to get an exact answer to what you're trying to find, whether it's looking up a domain on the internet or determining the nameservers for your home network. You can check out some example nslookup output here; we'll cover each of these modes in depth below: The Default Mode - You probably shouldn't be using this mode as it gives you the most generic and general answer. Server. Type: Server = domainname.tld (server name) For example: host nike.com Server = nike.com

Answer: nslookup server = nike.com 8.8
Default = server or domain name. Host www.yahoo.com
Host www.com nslookup A domain with no nameserver is treated as a name server if you don't specify a type. As we mentioned in our first section, many ISPs use these servers as default nameservers on their networked computers, so in many cases you won't be able to get your actual nameservers when you make this request. Some Internet Service Providers also have nameservers that block external requests, so you may not be able to fully determine your external DNS settings. However, if you happen to be getting answer from Google, you know it's at least working!
Default = domain name. Host www.google.com nslookup
IPv4 = IPv4 address only. Host 68.55.0/16
Host 68.0/16 nslookup IPv6 = IPv6 address only. Host 2002::1 nslookup.

What is use of nslookup command in Linux?

I just got some questions regarding nslookup command in linux? I am wondering what use of nslookup command. In one scenario it shows you the host for the web site, other scenarios use that command to check a domain for a subdomain like example.com for www.

Is it really for checking or is it really used for checking websites? It's just a basic network query tool. But in some cases its better usage than others.

Nslookup can be used to test dns servers and get dns answers. Nslookup uses recursion, so it queries your router and its parent routers and continues until it gets answer. Nslookup is very efficient and can therefore be used on slow connections. However you'll never get anything close to complete internet coverage on a home router, because most of the connections within the LAN are directly connected to the router (usually, there might be an Ethernet bridge in the house).

Nslookup usually only shows domain answers, and it tries first and second level only. It makes no effort to get to third level or beyond. This means that it is easy to miss subdomains. The reason is that it tries to reach the domain by default. If the domain has a CNAME (ie sub-domain) it would query this, otherwise it would skip them and continue trying subdomains. However it does not bother with those, it just stops here.

The best way of understanding what it does is looking at the options you can give it. You can specify which query types to perform, such as host, nameserver, or MX. You can set a DNS server to use, for example your ISP DNS server, or your own DNS server if you have configured one.

The options you'd typically choose, are: host - To find the IP address of a host. Nslookup hostname.domain If the record for a given host is listed, the NS name will be used to look up the IP address. Otherwise, we assume that the IP address is in /etc/hosts and use that instead. Host lookup results are cached in the cache files (nslookup caches a maximum of 10 different nameservers).

Nslookup ip.address hostname - to test reverse lookup of domain nslookup mx.

Is nslookup a DNS?

h0me, no. Nslookup is a lookup utility that is designed to query the nameserver information of another computer to translate IP addresses into FQDNs.
I see I was looking for the other way around thanks. it's also known as dig which translates FQDNs to IPs. cfhowlett, I have two DNS set in my resolv.conf, I guess I just remove them and add one I can get to connect to the WAN. But it looks like only one has the "search" domain name in it, so I figure it cannot reach the WAN because if my DNS server is in there it cant reach outside.
why can't it reach the WAN. cfhowlett, well, to be more specific, I dont really know what DNS server is used or where it got set from in my case. Just a wild guess is that I had some free time in linux last month and wanted to make some custom tweaks, and just made a change. I'm not sure why my connection doesnt reach out because im just guessing and it works with my browser but not ssh for example.
Ben64, I have my gateway setup to point to 192.168.1 instead of 192.1/24, I thought thats how you need it for routing to come up and route out?
huh, it does not. well unless you have some really weird routing setup. you still haven't said exactly what you're trying to do. Ben64, just a wild guess. When I try and connect using ssh using public IP or LAN IP, I get to password prompt and then it will not accept my public ip or lan ip for password, I have to use its private IP or WAN IP. I'm using Ubuntu 16.04. I just don't want to login to my wifi router when I go home instead of a wired connection.
ah, ok. In that case your private IP won't help Ben64, how can I set it so that my gateway is the same as my network card IP when it is configured with 192.

Can you use nslookup on Linux?

Hi there,I'm looking for a reliable way to determine if a DNS server can be used on a linux machine. Does anyone know if nslookup can be used from linux? If so, are there any problems using it?I've been using it on Windows but I'd like to make sure I'm not going to have to rebuild my entire network because I can't figure out this simple question on Linux.Thanks!

Re: ? There are 2 problems. One is that you can't just use the command and expect to see a DNS answer. You need to run a named daemon (named) in order to have a functioning dns server on linux. That's why we have bind9, etc.

The other problem is that you are asking if the DNS server supports the query. So you need to first find out if the DNS server you want to use supports the query.

So either use an interactive method or the -x option in the nslookup command. In order to answer your question about a windows machine: nslookup only uses BIND as the dns server, so if you use a windows machine, you will need to run bind on that machine in order to get answer to a query. The default windows DNS server has a problem, which makes it impossible for it to answer queries with the root domain, so if you ask a windows machine to resolve google.com, it will give an error.

>There are 2 problems. One is that you can't just use the command and>expect to see a DNS answer. You need to run a named daemon (named) in>order to have a functioning dns server on linux. That's why we have>bind9, etc.

Ok. What is the alternative to nslookup? Is there a way to check if the DNS server supports queries? I tried running named but it didn't work. It kept saying "named not responding" which I already knew since I didn't run it.

>The other problem is that you are asking if the DNS server>supports the query. So you need to first find out if the DNS server>you want to use supports the query.