How to force Linux to reacquire a new IP address ?

Hey,

How to force Linux to reacquire a new IP address from the DHCP server?
What is the command in Linux equivalent to Windows' "ipconfig /renew"
command?

Miem

V Sun, 11 Mar 2007 18:09:24 -0700, Miem napsal(a):

> Hey,
>
> How to force Linux to reacquire a new IP address from the DHCP server?
> What is the command in Linux equivalent to Windows' "ipconfig /renew"
> command?
>
> Miem


What distro?

ifdown eth0 ; ifup eth0

seems to do the trick for me.

--Yan

On 11 Mar 2007 18:09:24 -0700, Miem wrote:
> Hey,
>
> How to force Linux to reacquire a new IP address from the DHCP server?
> What is the command in Linux equivalent to Windows' "ipconfig /renew"
> command?

With over 360+ linux distributions you might want to
read http://www.catb.org/~esr/faqs/smart-questions.html

On my mandriva linux release 2007 I do a
service network restart


Depending on your DHCP server, you may get the same ip address.

In news:(E-Mail Removed) s.com,
Miem <(E-Mail Removed)> wrote:

> How to force Linux to reacquire a new IP address from the DHCP server?
> What is the command in Linux equivalent to Windows' "ipconfig /renew"
> command?

You provide no information about your installation, but if you have "pump"
installed then a simple "pump --renew" will work for you.

"man -k dhcp" should also teach you an important fundamental concept if you
are encumbered by any thought processes.

On Mar 12, 12:09 pm, "Miem" <MiemC...@gmail.com> wrote:
> Hey,
>
> How to force Linux to reacquire a new IP address from the DHCP server?
> What is the command in Linux equivalent to Windows' "ipconfig /renew"
> command?
>
> Miem

Thank you all!..
I'm using Fedora Core 5. Following your replies I've tested the
following two methods and both worked fine.

1- ifdown eth0 ; ifup eth0
2- service network restart

Regards,

Miem

Miem wrote:
> On Mar 12, 12:09 pm, "Miem" <MiemC...@gmail.com> wrote:
>> Hey,
>>
>> How to force Linux to reacquire a new IP address from the DHCP server?
>> What is the command in Linux equivalent to Windows' "ipconfig /renew"
>> command?
>>
>> Miem
>
> Thank you all!..
> I'm using Fedora Core 5. Following your replies I've tested the
> following two methods and both worked fine.
>
> 1- ifdown eth0 ; ifup eth0

Be careful with that one. It only works when you're connected locally.
trying it via ssh will result in a machine that is off the network
until you can get to the console.

--Yan

CptDondo <(E-Mail Removed)> writes:

>Miem wrote:
>> On Mar 12, 12:09 pm, "Miem" <MiemC...@gmail.com> wrote:
>>> Hey,
>>>
>>> How to force Linux to reacquire a new IP address from the DHCP server?
>>> What is the command in Linux equivalent to Windows' "ipconfig /renew"
>>> command?
>>>
>>> Miem
>>
>> Thank you all!..
>> I'm using Fedora Core 5. Following your replies I've tested the
>> following two methods and both worked fine.
>>
>> 1- ifdown eth0 ; ifup eth0

>Be careful with that one. It only works when you're connected locally.
> trying it via ssh will result in a machine that is off the network
>until you can get to the console.

Well, no, not if you actually put those on one line as he has done, it
should work fine. HOwever if you bring it down, you have no connection to
bring it up again if you do not send both commands at once.



>--Yan

Unruh wrote:
> CptDondo <(E-Mail Removed)> writes:
>
>> Miem wrote:
>>> 1- ifdown eth0 ; ifup eth0
>
>> Be careful with that one. It only works when you're connected locally.
>> trying it via ssh will result in a machine that is off the network
>> until you can get to the console.
>
> Well, no, not if you actually put those on one line as he has done, it
> should work fine. HOwever if you bring it down, you have no connection to
> bring it up again if you do not send both commands at once.


Not in my experience, but I relay through several ssh connections. I've
blown away my ssh connection more than once with that one.

I've taken to doing something like

nohup `ifdown eth0 \; ifup eth0` &

to make sure it comes back up.

On Mar 13, 1:49 pm, CptDondo <y...@NsOeSiPnAeMr.com> wrote:
> Unruh wrote:
> > CptDondo <y...@NsOeSiPnAeMr.com> writes:
>
> >> Miem wrote:
> >>> 1- ifdown eth0 ; ifup eth0
>
> >> Be careful with that one. It only works when you're connected locally.
> >> trying it via ssh will result in a machine that is off the network
> >> until you can get to the console.
>
> > Well, no, not if you actually put those on one line as he has done, it
> > should work fine. HOwever if you bring it down, you have no connection to
> > bring it up again if you do not send both commands at once.
>
> Not in my experience, but I relay through several ssh connections. I've
> blown away my ssh connection more than once with that one.
>
> I've taken to doing something like
>
> nohup `ifdown eth0 \; ifup eth0` &
>
> to make sure it comes back up.

What about trying dhclient eht0 that will request another dhcp address

On Mar 13, 1:49 pm, CptDondo <y...@NsOeSiPnAeMr.com> wrote:
> Unruh wrote:
> > CptDondo <y...@NsOeSiPnAeMr.com> writes:
>
> >> Miem wrote:
> >>> 1- ifdown eth0 ; ifup eth0
>
> >> Be careful with that one. It only works when you're connected locally.
> >> trying it via ssh will result in a machine that is off the network
> >> until you can get to the console.
>
> > Well, no, not if you actually put those on one line as he has done, it
> > should work fine. HOwever if you bring it down, you have no connection to
> > bring it up again if you do not send both commands at once.
>
> Not in my experience, but I relay through several ssh connections. I've
> blown away my ssh connection more than once with that one.
>
> I've taken to doing something like
>
> nohup `ifdown eth0 \; ifup eth0` &
>
> to make sure it comes back up.

I made a typo dhclient eth0