Ubuntu :: Eth0 Works Without Configuration - PC Doesn't Seem To Care About Anything
Mar 14, 2010
my internet connections works via my eth0 adapter. For Windows user this may be fine, but I actually would like to know what makes it connect. My /etc/network/interfaces shows:
[code]...
No eth0 mentioned here. dhcp3/dhclient.conf consists only of commented-out lines, so no eth0 here either. In /etc/init.d I see there is this networking daemon. When I do
[code]...
that magically enhanced eth0 works even if you want to shut it down. No wonder I don't get my wlan0 working, my PC doesn't seem to care about anything I am configuring here.
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Jun 10, 2011
I'm running oS 11.3 KDE 4.6.3. If I try to delete a read-only file in the terminal I can, but get a warning message I have to confirm:
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In Dolphin the file is simply sent to trash, no warning. I couldn't find a setting in Dolphin configuration options to change this. I do have "Ask for confirmation. when moving files and folders to trash" unchecked, but even so, if the file is read-only?
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Jul 17, 2010
I bought a laptop : Samsung R580 and when i want to install Debian Squeeze with NetInstall, it's impossible because ma Ethernet Card isn't recognized.These are the caracteristics of my card :PCI ID : 11ab4381Supporté : YesFabricant : Marvell Technology Group Ltd.Matériel : 88E8059 PCI-E Gigabit Ethernet ControllerPilote : sky2The driver is not in the kernel 2.6.32 and i must to wait a new kernel version in Debian?
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Aug 5, 2011
After to install Debian Sid, i can't to connect to my network. When i launch lsmod, ath9k is present so the module is enabled.I don't use network-manager-gnome, wicd and other, i modify myself /etc/network/interface. But even with this configuration, the wifi does not works.
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Feb 14, 2010
GNU GRUB 0.97
Ubuntu 8.04.4
2.6.24-26
Added an SSD (dev/sdc) and decided to move some less often changed directories there. Started with /usr and /boot, leaving / on a primary in the first drive, for now. All started ok, and my changed fstab mounted the right ones, and the system works.
However, grub is actually using the original /boot on / on sda1. I cannot see any way to change this. (Which makes it sorta hard to update the kernel
From grub:
Okay, since it has two choices, I tried to tell it which one to use. But, grub> root (hd2,5) does nothing.
Disk /dev/sda:
what I seem to recall, grub doesn't care about the boot flag on the disk. Nor does it care about primary vs. logical (except GNU doc says "makeactive" only works on a primary?).
The GNU doc also indicates that it looks for a directory /boot on the partition, so if you're mounting a partition as /boot, it also needs to contain a /boot directory under it. Tried that, but no change.
Is my problem the logical partition? Does that prevent "grub> root" from changing it? I'm afraid to wipe out the old /boot and find that I can't start up.
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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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Jan 20, 2010
i've just installed ubuntu 9.10, and i was browsing the internet fine using the live cd, but once i installed it to disk eth0 wont connect or even show it's all greyed out. lspci reporgts :Ethernet Controller Sundance Technology Inc /IC Plus Corp IP1000, ifconfig finds eth0 no problems i think it mihgt have something to do with root privs
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May 14, 2010
Ok, so eth0 is up and working great. eth1, however, comes up with a link light, however the packet counters in ifconfig remain at 0. Appears that eth1 isn't working.
Here's my setup:
-Dell latitude CPi laptop with 2 PCMCIA network cards and no built-in ethernet.
-Slackware v11
-eth0 is connected inside my router on my 192 network. Static address with good connectivity
-eth1 is connected on the other side of my router in promiscuous mode in order to listen to the traffic coming into my network.
Troubleshooting so far: I have switched the pcmcia cards between slots and regardless of which card is in eth0 or eth1, eth0 works and eth1 does not. I have also switched the card dongle between cards as well as the ethernet cabling between the cards. With any of the combinations eth0 works like a champ but eth1 does not, so I think I've ruled out hardware problems.
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Jan 18, 2010
I have a Proliant DL 120 G5 with CentOS 5.4 and I have installed a Brodcom Corporation Netxtrem BCM 5722 Gigabit Ethernet PCI. So I have two interfaces: eth0 broadcom eth1 Intel The eth1 works, instead eth0 don't work. I can ping itself and 127.0.0.1 but I can't ping the gateway. The results of netstat -nr is:
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Sep 13, 2010
When I shutdown computer and start it up, eth0 doesn't seem to show up (though lspci sees ethernet card and modules are loaded). When i reboot (which is exactly the same, in my opinion), it works good. I'm using Sabayon GNU/Linux, Gnome Network Manager applet.
>uname -srm
Linux 2.6.34-sabayon x86_64
>sudo lspci | grep Ethernet
00:19.0 Ethernet controller: Intel Corporation 82578DC Gigabit Network Connection (rev 05)
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Oct 10, 2010
I setup a mythbuntu pc with an onboard card (eth0) so I could watch and listen to movies and music stored on my other pc in the basement. Everything worked fine until we had a power outage. I turned on the pc after the outage and had no networking.
I looked and saw no link lights. I verified the network port but plugging in a laptop. I got an ip and able to connect to the internet so the port is not the issue. I plugged in a pci 10/100 card (eth1) and booted up, got link lights, but no networking and not able to even ping the gateway. I setup a static ip in /etc/network/interfaces and added a route to the gateway/router. Still nothing.
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Apr 22, 2011
im trying to setup eth0 with subdevice eth0.0 and eth0.99 to come up at boot
eth0 is dhcp clint
eth0:0 is static ip
eth0.99 is 802.1q vlan interface
/etc/network/interfaces
Code:
auto lo
[Code]....
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Jun 6, 2010
I am new to iptables. The setup tool on a VPS doesn't work. So, I am learning to insert rules. I have inserted so many and some of them show as duplicates now.
1- I want to know how to remove the duplicates. Is there a file that these rules are store in so I can go in and easily edit it?
2- Is there any other utility that handles firewall in Linux that I am unaware of? or is the iptables the ultimate door guard? This is a plain install of CentOS.
3- Since I believe I opened port 5090 but I think it still might be blocked, could SELINUX be the problem? How can I get my way around setting it to permissive or disable if I don't have access to "setup" command?
4- What is the order of iptables reading? does rule #1 supersede all other rules? or does the last rule supersede all rules prior to it?
5- Do the rules below make a fairly safe system? (except for the duplicates which should be remove) I understand that a safe system is dependent also on the applications that are allowed in this category and I am not talking about those. I am talking about dropping all other inquiries and in general is this how iptables are setup? This is what I currently have:
[root@tel ~]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
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Aug 27, 2010
Running Ubuntu 10.04.Based on this guide, http://ubuntuforums.org/showthread.php?t=360901 I have WOL working, but to a certain degree. I set my MB bios up, installed the appropriate apps, setup rc.local to start ethtool -s eth0 wol g. I sent a wakeuplan command from another machine and the PC started up.
The only issue is that when it comes out of hibernate from the wakeonlan request eth0 doesn't autoconnect, so if I try to remotely wake it, once it boots into the gui eth0 will remain disconnected until I manually start it.
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Apr 30, 2011
my internet was fine.. until.. i had to work in the school so.. a teacher configured the internet settings.. for something .. ( i don't remember) and everything was fine. but when i returned to my house and conected my lap to internet (cable) the internet didn't work.
ubuntu@VR:/etc/network$ ifconfig
eth0 Link encap:Ethernet direcci�nHW 00:1d:72:46:38:3c
Direc. inet:192.168.1.65 Difus.:192.168.1.255 M�sc:255.255.255.0
Direcci�n inet6: fe80::21d:72ff:fe46:383c/64 Alcance:Enlace
[Code].....
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May 20, 2011
I have an adapter eth0 I need one shared folder to exchange files, with another machine configured as 192.168.0.3/255.255.0.0
ping is working fine between both machines, but I think my problem is in routing, or I need to add a shared resource and I am having trouble with that... not sure if maybe I need to mount something as nfs or what?
[Code].....
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Aug 12, 2010
I have three VMs (VMWare Server 2) all running Ubuntu Server 10.04. (one I asked to be a samba share from the outset, the others are blank server installs, no pre-config)
I follow the layout in the community documentation regarding setting up firewall rules through iptables. I.e. I create a file called iptables.rules and place it in /etc. I then modify the /etc/network/interfaces file to look like this:
Code:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
[Code].....
However this third one I have reinstalled Ubuntu 3 times now, and every time as soon as I modify the /etc/network/interfaces file, eth0 fails to start up (is not visible in ifconfig, only the loopback adapter), and no networking works.
I have tried reducing the iptables.rules file (which is a carbon copy across all machines anyway) to a basic accept all rule, and it still doesn't like it. As soon as I remove those two extra lines in the interfaces file, the network starts up no problems and eth0 is there.
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Mar 13, 2011
I am running the latest ubuntu and I am having trouble getting networking sorted. I have 2 networks, one wired (eth0) and one wireless (wlan0). I connect to the internet using wireless. The problem is that I can only successfully connect to the internet if I disconnect from eth0. I have hit this problem with Windows machines and the solution was to adjust the "interface metric" in "Advanced TCP/IP Settings" so that the wireless was the preferred connection. How can I achieve something similar in Ubuntu?
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Jun 25, 2010
In an attempt to set up wireless so I could connect to the university network, which I think I probably should have just downloaded network manager or something but I didn't, I tried to put things in /etc/conf.d/net and some other places and I am afraid I'm not sure exactly what (and I have learned my lesson! I will pay attention to what I am doing so I can undo it next time I mess around with stuff!)
Anyway, the long and the short of it is now, when the computer is starting up and its doing the init stuff net.lo doesn't start. Later try and start net.lo or net.eth0 you get told "not enough arguments"
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Dec 17, 2010
I installed Debian Squeeze on my system two days ago, using a wired connection to internet (which worked fine). After that, I had to install the non-free wireless package in order to scan wireless networks. It now works fine, and I can connect and get to internet. But with wired connection, i connect via eth0 and none of my applications work. And they're not in offline mode.Also, i already went here: URL,,, and I checked if that was my case. I tryed what they say several times in some different ways, but I still can't connect. Even more, if I change something like they say, I get "unmanaged device" and I can't even connect to the internet. And the wired connection works, I'm using it right now on my ubuntu 10.10.
If you want more information, I just tried to ping sites like google.com or ......com using network preferences and it does work, it gets 100% of the packages back around 50ms later, so the internet appears to work. Also, when I connect via wireless, everything works perfectly.
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Feb 19, 2011
Freshly installed Lenny system. Edited /etc/network/interfaces to use a static IP:
# The loopback network interface
auto lo
iface lo inet loopback
[code]...
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May 10, 2011
I noticed that when my server boots up, it's network interface on eth0 is always down and I always must run the 'ifup eth0' command in order to get it to work for some reason. I checked my configuration and it looks legit to me...
# This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5).
[Code]...
Anyone know why my system is booting with out bringing up my eth0 interface? It's very annoying.
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Jun 23, 2009
have a Dell with a 1510 WLAN mini card and tried the solution posted by pschaff in the parent forum. When I got through with the process, I could no longer connect to the internet with a hard-wired ethernet connection. When I open the network connection manager and click on Activate, I get the message:/sbin/ifup: configuration for eth0 not foundUsage: ifap <device name>etho used to be the connection I had to the internet with a hard wired ethernet cable to my modem. I have attached the lspci -m and lspci -n data suggested
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May 14, 2011
I am trying to connect my fresh new Ubuntu 10.10 to my router. However I am having a bit of difficulty. This is what I have done so far:
Code:
lspci
My devise is a Broadcom Corporation BCM4311 802.11b/g WLAN (rev 02). Then:
Code:
sudo ifconfig eth0 up
sudo iwlist eth0 scan
I get eth0 Interface doesn't support scanning.
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Nov 30, 2015
I am using Debian 8 with systemd. I noticed that eth0 it is not starting automatically.
During boot process, I see this message: a start job is running for LSB: Raise network interface
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May 26, 2011
I have twe network cards eth0 and eth1. eth0 is connected to internet and eth1 is unusable. So, i'd like to redirect trafic from eth0 to eth1. how can i do it?
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Jul 20, 2011
I recently set up a Debian-based gateway+router on a remote site. I've installed OpenVPN and made a VPN bridge to another network (that server is also Debian). The main network has all the resources and also a VoIP server (asterisk). Bridge seems to work fine, except that every time a Linksys phone is used to call - after a few seconds I get:
Jul 20 12:16:05 sklad kernel: [403987.817695] eth0: link down
Jul 20 12:16:05 sklad kernel: [403987.817939] br0: port 1(eth0) entering disabled state
Jul 20 12:16:07 sklad kernel: [403990.113701] eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
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So whenever the phone is used, network falls down for a few seconds. And of course this breaks the call. There is also another Linksys box (analog-to-voip) and it works fine most of the time. However sometimes this "eth0 link down" happens too. There is nothing more in syslog to analyze, so I don't know where to dig. Physical device of eth0 is D-link DFE520.
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Jan 26, 2011
I have installed the Squeeze testing version. i have setup networking for static in the /etc/network/interfaces file. tried to find resolv.conf in the /etc/ since could not find i created this file post trying to start the eth1 i am able to ping my ip, but if try to ping the gateway i get an error saying the ping is not sucessfull. I have 2 network cards, eth0 and eth1. as eth0 does not work i have configured eth1. The dump of the interfaces file is below
[code]...
The same setup works fine in Ubuntu 10.10 setup that i have.
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Mar 18, 2011
I created a F14 x86_64 guest OS in VirtualBox4 (hosted by F14 x86_64) and configured it to get its IP from my router but it won't do so on boot. The other guest OS's (Fedora 14 i386, 2x Oracle EL5) are able to get their IPs on boot.
I checked the setting in the network manager and they show that the interface is to be activated on boot but it doesn't. When I log in and run ifup eth0 as root it works.
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Dec 15, 2010
on my dell latitude e6510 opensuse 11.3 kde 4.4.4 with tri boot windows 7 and two suse if boot with windows7 and I connect to internet by wired eth0 and then reboot in opensuse, networkmanager doesn't find my networkboard eth0 but only wireless, I have to reboot, enter in bios setup, exit, reboot, and then opensuse find my eth0, I tried with gnome too but is the same
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