IP address

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# 1  
Old 03-13-2002
IP address

Hi All,

I logged into to a unix machine, from $ prompt what should I type to get IP address of that machine?

Thanks inadvance,

# 2  
Old 03-13-2002
netstat is a good start. I don't know much about what it will tell you or the options running it. Try it and see. Hopefully someone else will have more information for you.
# 3  
Old 03-13-2002
Try typing ifconfig, then enter.
If it doesn't find that command, you'll have to specify the whole path. For example, you might have to enter "/sbin/ifconfig".
You should get something similar to the following:
eth0 Link encap:Ethernet HWaddr 00:60:97:C7:9F:72
inet addr: Bcast: Mask:
RX packets:4223201 errors:0 dropped:0 overruns:0 frame:0
TX packets:49783 errors:0 dropped:0 overruns:0 carrier:1
collisions:355 txqueuelen:100
Interrupt:9 Base address:0xfe80

lo Link encap:Local Loopback
inet addr: Mask:
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
You'll notice that there are two entries - one for each interface. The first one is eth0, my primary (and only) ethernet interface. In that block, a field named "inet addr" shows the ip address, in my case,
The second block is lo, the loopback interface. It doesn't physically exist, but nearly every system should have one. It's address will always be
Note that there may be more than one "real" interface. A single machine can technically have 255 (i think) IP addresses assigned to it.

By the way, your interface names may vary. This one is from a Linux box connected via ethernet.
# 4  
Old 03-13-2002
The easiest thing is:
uname -a and you will see the name of your machine
then ping namemachine
or grep namemachine /etc/hosts
That's it!
# 5  
Old 03-13-2002
You could also do it in 2 steps Smilie

#1 Type hostname
#2 nslookup (hit enter, then type the hostname or fully qualified hostname from #1)
# 6  
Old 03-13-2002
Sometimes an `ifconfig` with no switches is not enough.

On my OpenBSD2.9 machine I have to either specify the individual nic or the "-a" switch to display all adapters. Oddly enough, the lone `ifconfig` is sufficient under FreeBSD4.5 to display all adapters and settings.
# 7  
Old 03-15-2002
Yup thats right
SOlaris takes a option -a to ifconfig
but IRIX needs to be passed its network interface as the argument , no -a works with it

nslookup is a good option too

But i would rather prefer vi /etc/hosts
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