Configuring Network Interfaces… January 31, 2006
Posted by Carthik in ubuntu.trackback
If your laptop takes too long to configure network interfaces, especially when you are not on an network, you can stop it from waiting by hitting Ctrl+C. This will cause this step to be skipped.
On a more permanent basis, you can modify the amount of time your computer waits for network configuration as follows:
Edit /etc/dhcp3/dhclient.conf
Edit the line that says:
#timeout 60
to read
timeout 20
Now your laptop will only try for 20 seconds to configure the network interfaces. 20 seconds is ample time for my laptop’s network interfaces to get configured. (I actually use nm-applet, but that is another story…)
If you want to disable the configuration of the ethernet network interface (eth0) at startup, edit “/etc/network/interfaces” and comment out the line “auto eth0“. You will have to bring up eth0 manually later, by doing $sudo ifup eth0 whenever you are plugged into the network.
Ubuntu Blog 
Good tip, thanks!
I’ve written a little script that connects you to networks (so you can skip network interfaces completely, for instance) with the syntax of
wifiscript Essid keykeykey
if anyone wants it, drop an email to bplaut [at] gmail
don’t you know about some program for linux, that will connect notebook to one of predefined wifi networks, when such network becomes available?
i realized, that you’ve already written about one a few posts ago 😉 so thanks 😉
thanks loads for that
Awesome tip! Three years I’ve been using Linux and now I find out about this. Sheesh! 🙂
I’m just having problems installing my nic. But when done I’ll it’s a great trick
If you don’t manually want to bring eth0 up you can install the daemon ifplugd which will do it automatically when the cable is inserted.
the network administration tool from ubuntu (Breedy Badger) does n’t seem to manage profiles properly.
i have setup two profiles. one as ‘home’ and other as ‘office’
but i find later that both the profiles point to ‘home’ configuration
i.e, ‘office’ profile is overwritten.
so that i need to make a re-entry for office configuration
is this so, or i am doing some thing wrong here
I am not able to make internet conection with Ubuntu.I tried everything,but still…Please give me some answer.to this .
check DNS entries
wow… cool trick. I was really bored of having my linux box so slow during the boot process when I wasn’t connected.
Thax
Recently I have changed my os to linux ubuntu . while I am connecting to net it is saying fire fox is not permitting . will you please explain how to configure with bsnl broad band to net.
[…] Wenn der Laptop hochfährt hängt er erst einmal bei der Netzwerkkonfiguration fest. Das liegt an den Interna von /etc/init.d/networking. Abhilfe schafft, die Timeout-Zeiten für den DHCP-Client herabzusetzen, die der Hauptgrund für die Verzögerung sind. Genaure Infos gibt es bei Carthiks Ubuntu Blog. […]
doesn’t work for me
Hi
When I press sudo ifup eth0 to activate the network it is displaying as
ifup: could;nt read interface file “/etc/network/interfaces” what could be the problem
I setup ubuntu 7.10 on virtual box.
i cant ping out to any machine. why?
sombody help me.
all is still default.
but changes to ip address.
is theres anyone encountered that kind of problem
Go look in vbox documentation. The vbox networking does not pass UDP- ping will not work.
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I was facing this problem when I last upgraded my Ubuntu 8.10 from Ubuntu 8.04. The above solution worked for me.
One more thing; you can put comment ; by putting # at the beginning of the line (for those who are newbie 🙂 )
i realized, that you’ve already written about one a few posts ago 😉 so thanks 😉
thanks loads for that
manager) said that they put the item in the plastic bag!
Someone stole it! Definitely it is the worker!
Another thing is that 7 of the
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