Ubuntu Servers :: Network Interface Not Found?
May 9, 2011
Alright, here's the problem: I have a server going that was running 10.10, then upgraded to 11.04 with no problems, but when I reinstalled 9.04 (so i could muck around with GNUPanel), the install couldn't find the ethernet on the motherboard (which I had no problems with on 10.10 or 11.04). I'm a bit of a newb, but it seems to me that something is very wrong here because I can't get online. All of the other computers in my house are unaffected, so I think I can narrow it down to the device not being recognized, but beyond that, I'm lost.
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Feb 10, 2011
Last night I created a fresh install of Ubuntu Server 10.10. I was working through a tutorial to set up a development server for home use, and everything worked perfectly. I was able to install OpenSSH, Apache, MySQL, and PHP (and Vim) with no problems. I was also able to use "ifconfig" to determine the network address of the server and I was able to view web pages on the server from another machine on my home network, using a browser. So, everything was "peachy". [By the way: The server is connected to the router using a CAT5 cable. This is a WIRED connection] I shut the Ubuntu server down at the end of the night and, now that I have rebooted this morning, I have apparently lost the network interface. I cannot ping anything from the server. If I run ifconfig, only the "lo" configuration is listed, with the 127.0.0.1 address.
[Code]...
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Jul 18, 2011
I have a ppp0 entry with post-up options like this
mapping ppp0
map none photon-plus motorola
map timeout: 12
[code]...
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Apr 14, 2011
I found multiple sites explaining how to add IPs to a network interface as virtual interface like eth0:0. However I can add IPs to an interface as well using the ip command: ip a a 192.168.2.2/24 dev eth0 What I want to know is how I can make this persistent on rhel/centos.
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Jan 24, 2010
During install of 9.10 server, both ethernet adapters were found. One is built-in to the motherboard, the second is on a PCIe slot. Selected the on-board adapter for eth0 during install, set fixed IP on the web, connected, updated, etc. w/ no problems. The second adapter is for the LAN.BUT, on first and subsequent reboots after installation complete the second adapter is not detected at all, as if it were not even plugged into the PCI or the driver not loaded. This happens on either of two slots, with two different adapters, Intel or Netgear, both pretty recent, and both of which are detected and work in a different box. 'Ethtool eth1' says device not found.This is a fairly recent motherboard 3N78EM).Since the adapter was found during installation I'm assuming that the problem is not with not the board. I've built several server systems with two or three ethernet adapters and have never run into this situation.
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Nov 16, 2010
I am using Avast anti-virus for my linux machine. On internet, I found that it has good user interface. After installing avast I can't get the interface. I've to use Avast via terminal. How can I get the user interface??
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Jul 18, 2011
I booted an OS from live disk. The OS boots successfully but eth0 fails to start. I checked lspci , it outputs the exact ethernet card details :(Broadcom Netextreme II BCM5716 Gigabyte ethernet)
Ifconfig -a returns only loop back interface lo and sit0. The output of dmesg | grep -i 'eth' is :"Netfront : initializing network ethernet driver"
I was also able to find the kernel module bnx2.ko. I did insmod and lsmod lists it. I am not sure what exactly is the issue or how to debug this problem. Any assistance or pointer will be helpful. Thanks for your time.
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Mar 12, 2010
I have tried the command on ubantu workstation but it giving error : # mii-tools SIOCGMIIPHY on 'eth1' failed: operationsnot support. no MII interface found.
Internet not working. tell me anonymous of kudzu command in fedora.
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Apr 7, 2011
I am totally new to Linux and have just installed ubuntu 10.10. After configuring the network interface via dhcp I started getting these messages that come in so frequently I can't configure anything else.
[87.186415] Stack:
Why I am getting this messages and more importantly how do I get rid of them.
The installation is on a VM on Hyper-V.
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Jul 19, 2011
I booted an OS from a live CD. The OS boots successfully but eth0 fails to start. I checked lspci, it outputs these Ethernet card details:
(Broadcom Netextreme II BCM5716 GBabyte ethernet)
ifconfig -a returns only the loopback interfaces lo and sit0. The output of dmesg | grep -I 'eth' is:
"Netfront : initializing network ethernet driver"
When I run service network restart I get:
"Obtaining IP for lo [FAILED]
WARNING: Deprecated config gile /etc/modprobe.conf , all config files belong into /etc/modprobe.d/
Device eth0 does not seem to be present, delaying initialization [FAILED]"
The output of MII-tool -v is:
No MII interface found.
I was also able to find the kernel module bnx2.ko. I did insmod and lsmod lists it.
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Oct 15, 2010
My windows XP computer cannot get an IP address from the Ubuntu 10.04 DHCP server. It is configured on the DHCP server to receive a static address outside the main DHCP pool.
Partial config:
Quote:
subnet 192.168.168.0 netmask 255.255.255.0 {
pool {
failover peer "dc02";
range 192.168.168.1 192.168.168.164;
[code]....
The Windows machine seems to think there is already another computer on the network with 192.168.168.178, but it's wrong: there is no such address on the network.
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Aug 30, 2010
today I tried to configure a network route to a host for testing my network interface. Code: route add 192.168.1.15 eth0 As I have to eth interfaces and both interface got their IP from DHCP (192.168.1.11 and 192.168.1.12) and are in the same subnet, I shut the other interface down:
Code: ifconfig eth1 down Then I tried to test the interface by doing a ping to 192.168.1.15.
Problem: When I unplug the cable from eth0 (and eth1 is still plugged) the ping still works. Somehow my linux (it's debian) powers up again eth0 and pings over this port.
How can I stop my linux doing this. I just want to have the route added only on the one interface - not the other. Is it maybe some case of a default-gateway?
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Aug 20, 2010
Config: Squeeze, 2.6.32-5-amd64I just installed squeeze and the network is up and nm-manager deamon if working but the Gnome applet doesn't seem to work as usual. It indicates no network although the network is available as indicated by ifconfig and route below. When I switch WiFi on, the nm works flawlessly. When I click on the applet icon it says "Wired Network: device not supported" (or similar, msg in french is
eth0 Link encap:Ethernet HWaddr 00:1f:e2:12:ea:d8
inet adr:192.168.0.182 Bcast:192.168.0.255 Masque:255.255.255.0
adr inet6: fe80::21f:e2ff:fe12:ead8/64 Scope:Lien
[code]...
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Feb 14, 2010
Last night while setting up wired & wireless connection in openSuse 11.2 Gnome version via YAST's ifup, I got wireless but lost wired connection (interface eth0). Dmesg shows that eth0 became eth1. I cannot get eth0 back. Is there any way to remedy this situation, eg. get info from the Ubuntu partition in my triple-boot laptop, without having to re-install openSUSE?
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Mar 1, 2010
I would like to use zypper to update openSUSE 11.2 through the Virtual Terminals (tty1 thro' tty6).
Network Interface is wlan0 (Wireless LAN, home network through a Router) that requires a password using WPA2.
My question is how to start wlan0 through the command-line ?
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Dec 26, 2010
I have a laptop connected to the the net thru an adsl modem, when I switch off the laptop network interface,(thru system-config-network) the light of the laptop network card plugged in the router stays on ( green) where as in my pc, when i do the same thing , the light of my pc network card goes off in the modem
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Nov 15, 2009
I have 2 network cards eth0 and eth1, for eth0 i set a manual MACADDR in network scripts. Ok so every time i boot, if the cable is plugged in, my eth0 fails to mount or i don't know.. i get this after bood when i type ifoncifg eth0 (eth0: error fetching interface information:Device not found). So i have to unplug the cable when i boot, then plug it in and do a service network restart.
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Jul 15, 2010
I am having trouble setting up my second network interface on Ubuntu Server 10.04. When setting up the machine it did detect both cards but I only picked one to configure, and now I want to setup the second.
I went into /etc/interfaces and basically copied the settings for eth0 but changed the IP and the name to eth1. I then restarted.
Quite honestly it might be working! But when I run ifconfig -a I see no packets I see
Quote:
eth1 Link encap:Ethernet HWaddr 00:0e:0c:59:af:c4
inet addr:192.168.4.21 Bcast:192.168.4.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
[Code].....
isn't that what "UP BROADCAST...." line means?
So perhaps my question is how do I test my 2nd interface? I tried using the 2nd IP with Putty (which is how I usually work on the machine) and couldn't connect.
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Aug 20, 2010
I have a server with two active network interfaces. On one, I need ssh open for all users (it's running LTSP, and as I learned the hard way today, blocking ssh kills LDM access).
On the other interface (which connects to the rest of the network), I only want to allow a few administrative users to connnect.
Is there a way to do this cleanly using sshd_config or PAM? I don't want to do something hacky like running dropbear.
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Feb 13, 2009
I have created a folder including some html link pages in /test/htlink . Now I want to create a soft link of that folder as htlink -> /test/htlink in /var/www/html . Now when I m browsing the folder , its erroring (404 Not Found) folder is not found on the server . I have given 777 permission on every file-folder in /test . No firewall & no SELINUX .
*** I want to browse the folder ***
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Feb 28, 2011
I have an old PC that I turned into a server. I have Ubuntu 10.04 running on it. I am looking for some media server software that can stream .mp3s to multiple computers over a LAN. But, I would like a software that can stream through a web interface. I would like my family to be able to open a web browser and go to the server and play files by clicking on them.
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May 2, 2011
Is there any web interface that I can install to remotely reboot ubuntu? It would only be accessible via a VPN or on the LAN so not too much worry over security.
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Jun 1, 2009
I am trying for the last many days to setup my opensuse 10.3 as Samba PDC Server according to the URL mentioned below, but in vain:How to setup SUSE 10.3 as Samba PDC - openSUSE When ever I try to join a Windows XP machine to the domain setup on Opensuse, I get the error:'The following error occured while attempting to join the domain. The network path was not found'. What could be the reason for this error despite of the fact the I am able to ping the FQDN of the PDC from the XP machine, but the XP machine simply denies to join the domain because of the above mentioned error.
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May 5, 2010
My network name is eth2 it was changed by some reason and now i got these errors... i installed, reinstalled, re re installed, tried to run the asistant but no luck :/
Code:
* Stopping the Firestarter firewall...
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
[code]....
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Jun 16, 2010
I want to set up a home computer as server. I've installed Ubuntu Server Edition 10.04, and can access it through SSH. However, I would like to have a browser based interface for managing things, such as installing a phpBB forum and stuff like that. Also, I want my friends to be able to share files on my home server as well. I know I can do it by using FTP, but I would rather not have them to install a FTP program.
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Jan 5, 2011
I have installed ubuntu server 10.04 sucessfully. But I'm new to ubuntu so I need graphical user interface(GUI). How can I install gui in ubuntu server 10.04.
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Jan 7, 2011
I'm having an odd problem with Server 10.04. I have two interfaces but only one interface is brought up on boot - and it's not always the same interface. Usually eth0 fails and eth1 comes up fine, but sometimes eth1 fails and eth0 comes up. I'm using the same config that was previously used on Server 8.04, but never had this problem on 8.04.
/etc/network/interfaces:
Code:
# The loopback network interface
auto lo
iface lo inet loopback[code]....
Once the system has booted, if I run /etc/init.d/networking restart, then both interfaces come up fine. However, having read that this is now an upstart, I also tried service networking restart, but get:
Code:
restart: Unknown instance:
Don't know if that's significant or not.
Cannot find a single problem with networking reported in log files, other than bound services failing to start as a result of the interface not being up (dansguardian, squid, dhcp which are all bound to eth0, and therefore fail when eth0 doesn't come up. And when eth1 doesn't come up, the only process that fails to run is clamav-freshclam). Although at one point I did see something about interfaces being renamed which seemed a little odd.
I could just have networking restarted automatically once booted, but this obviously isn't a solution to whatever is causing the problem. There is quite a bit running on the server: Samba/LDAP domain controller with roaming profiles, squid & dansguardian with LDAP auth, postfix & dovecot with LDAP auth, mailscanner, dhcp & ddns, strict iptables policy with nat... so I'm not sure if any of those could have any bearing on interfaces?
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Apr 12, 2011
2011-04-11 11:57:03 UTC I don't know what happening with my centralized log-server running octopussy. Currently it is working in a vmware setup with approx 980 Mb ram and is set in bridge mode. Currently is it set to receive logs from logs devices which are 4 in number one of which includes the core isg-1000 device. This setup is still in its test form....now what happens after some time (sometimes it taken days and sometimes just hours) when the connection (https) is suddenly lost to the apache and i can no longer access the interface. What happens more strangely my Ethernet interface gets shutdown on ubuntu. I have to restart the services by issuing /etc/init.d/networking restart.
Even at times it itself start receiving network packets on its own; without even restarting; i don't what the hell is wrong with the server. I cannot understand its erratic behavior. I need a sound and reliable Ethernet connectivity at all times because coz of loss of connectivity in my case would mean loss of logging functionality. I dnt want any time-gap in logging ...as im currently logging some highly critical devices on this server.
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Mar 23, 2010
Is there a way to make a program use a specific network interface ? When using my laptop at work i may be physicaly connected to multiple networks. i was wondering if i can make sure that certain applications use a specific network interface. I would google around for the answer but i cant figure out how to phrase it correctly for a search.
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Oct 27, 2009
Is there any API or event notification scheme to tell when the network is down/up?
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