What is the the command line that will give me full DNS IP address?

Hello,

I am kinda new but learning fairly quickly in linux. I am a windows user and I am very familiar with the ipconfig /all command and it shows IP and DNS ip and such. When i use the ifconfig -a it shows the info i need but it does not show the DNS IP addresses like Windows does. So what is the command line in Linux for me to see all relevant information needed?

Thanks,

MrD

not sure of a command off-hand but it is defined in /etc/resolv.conf (on some distros, at least -- RHEL, CentOS, Fedora, ...) and you can 'cat' it to see what nameservers are defined.

cat /etc/resolv.conf

hope this helps.

Hey Rayford, that is exactly what i been looking for and very helpful. Kudos to you and thanks alot.

MrD

Good to hear.

and Welcome to LQ!

You can also use 'ip addr show'

'ifconfig' would work as well. It is similar to ipconfig.

Originally Posted by cincindie 'ifconfig' would work as well. It is similar to ipconfig.

This doesn't show the DNS server ip addresses.
Nor does ip addr show
so
cat /etc/resolv.conf
is the way to go.

[quote=mrdancemachine]When i use the ifconfig -a it shows the info i need but it does not show the DNS IP addresses like Windows does. [/code]

Originally Posted by mrdancemachine Hey Rayford, that is exactly what i been looking for and very helpful. Kudos to you and thanks alot. MrD

he's already used ifconfig, it does not show nameservers. resolv.conf does.

Thanks.

See the man page for hostname, specifically "hostname -f" should show you the FQDN. This should be a little more portable than looking at /etc/resolv.conf, in case you run into machines that NIS+.

you can use the following two commands:
nslookup "Enter"
server "Enter"

it will show you your name server.
beside dig is also a helpful tool.

Originally Posted by Omer Fadul you can use the following two commands: nslookup "Enter" server "Enter" it will show you your name server. beside dig is also a helpful tool.

There seems to be some confusion with these answers.

He wants the IP addresses of his ISP's Nameservers.

All the commands except

cat /etc/resolv.conf

relate solely to your machine NOT the ISP's name servers.

ipconfig is a windows program which does a combination of what

ifconfig and cat/etc/resolv.conf do under linux.

If ou want to see something similar try
/usr/bin/network-admin

try traceroute to somewhere, like:

traceroute yahoo.com

you can see the complete routing out of your box

cheers

ifconfig -a | grep inet | grep -v 127.0.0.1 | awk '{print $2}'

Just try with it. It is giving ip address for the machine. It is working fine for me.
Here main command is "ifconfig -a" after that is just to grep the desired output.

@
Satish Kumar Gupta
Hyderabad, India

Originally Posted by satishgupta05 ifconfig -a | grep inet | grep -v 127.0.0.1 | awk '{print $2}' Just try with it. It is giving ip address for the machine. It is working fine for me. Here main command is "ifconfig -a" after that is just to grep the desired output. @ Satish Kumar Gupta Hyderabad, India

Please see post 11 in this thread. He wants the IP address of the ISP's DNS Server that is their NAMESERVER

Not his own

Note that if you are using DHCP to obtain a temporary IP address and DNS server addresses, the contents of /etc/resolv.conf can change when you renew the lease on your IP address, change networks, or log on to a VPN.

This behavior can be controlled by tweaking the DHCP config file (/etc/dhcp3/dhclient.conf on my box).

JP