Ubuntu Networking :: Change Eth0 Back To Be Primary Nic?
Mar 16, 2011
I've been fighting with this nearly for three hours, but nothing seems to be working. I have one Gigabit Realtek chip integrated on my Mainboard (which I use for internet connection), and one aditional 100Mbit in PCI slot. So, I basically want to use this 100Mbit for testing purposes, but when I connect something to this 100Mbit NIC adapter, it becomes default and I can not access internet. So, I want to set my eth0 (gigabit integrated adapter) as default adapter.
P.S. I've tried to edit /etc/network/interfaces and iftab, but nothing worked.
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May 7, 2009
Centos 5.3 How can I change the primary nic from eth1 to eth0? My board has 2 nic's and I'm having license issues with cpanel
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Jan 31, 2010
I have two network interfaces on my computer but only one of them is connected to an Ethernet cable. Until now on every Fedora release, the activated primary interface has been named as eth0 and everything has always worked well without any problem. Recently I switched to Fedora Core 12 and surprisingly I observed that for the first time, my primary interface has been considered by the system to be eth1 instead of eth0. I tried to replace the content of ifcfg-eth0 by ifcfg-eth1, yet system gave me an error that there was MAC address mismatching. I conserved their MAC addresses in their files and just replaced other connection parameters ( such as IP ADDR, NETWORK, NETMASK, etc.) but it did't work. When I do "server network restart", the command blocks.
As I try to install oracle on this system, regarding the fact that oracle requires static network configuration on the primary network interface, I don't know how to proceed in order to set eth0 as my primary interface (or rather set the current eth1 to eth0 because it is actually eth1 that refers to my activated primary network card).Just one more time, I would like to remark, that with previous versions of the Fedora Core, on the same computer (with the very same two network cards) I never had problem and I had installed oracle on the system with success, having the statically configured eth0 correctly detected by the system.
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May 3, 2010
I'm running Kubuntu 10.4. My problem is that Network Manager keeps defaulting back to Auto eth0. I have created a new wired connection and set my manual addresses. I have ticked the 'connect automatically' button. Every time I reboot or wake up it reverts back to Auto eth0.I did have wicd installed but this was not reconnecting after wake up (said it was connected but I couldn't ping etc), this is a pain also.
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Mar 14, 2010
I run an Ubuntu Server in a Virtualbox environment. Setup works fine. In virtualbox, I accidentally hit a button that generates and assigns a new mac address for the network adapter. Since then the machine does not bring eth0 up. I tried the following ifconfig eth0 down; ifconfig eth0 hw ether macaddress; ifconfig eth0 up. Then restarted networking.
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Apr 3, 2009
I have two network devices :
1. Intel Corporation 82574L Gigabit Network Conncection (Currently eth0, Mac=00:0e:8c:ab:c6:b1)
2. National Semiconductor Corporation DP83815 (Currently eth1, Mac=00:0e:8c:8a:70:62)
I want to change them so that the "Intel" become eth1 device and the "National" become the eth0 device.
I already tried these steps :
1. I disabled the Network Manager and enabled network
2. Edit the /etc/udev/rules.d/70-persistent-net.rules like this
Quote:
3. Change the /etc/sysconfig/network-scripts/ifcfg-eth0 and /etc/sysconfig/network-scripts/ifcfg-eth1 MAC addresses.
4. Reboot
5. After it bootup the Fedora can't recognize the devices, if I do ifconfig -a it shows "eth0_rename with FF:FF:FF:FF:FF:FF mac address".
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Jan 23, 2010
I am using opera 10.10 built 4742 i686 version. My proble is when i change to other workspace and then go back to opera, sometime, it will have the typing problem (at search bar and address bar). Need to roll it up and then roll it down before can type again. I am using Ubuntu 9.10 64 bit with latest updated.
However, the opera (same version and get from the same source: [URL]) does not have the same problem on Linux Mint 8 (dual-boot with ubuntu 9.10). As i know Linux Mint 8 is based on ubuntu 9.10.
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Aug 19, 2009
5.10 Breezy configured as machine controller. Works great eth0 is a fixed IP to communicate with controller comms board. Not easy at all to alter - the comms board is hard coded to listen on eth0 for commands.
I can use eth1 as the default gateway and ping google.com, etc. But when I now attempt to communicate with the controller with netcat, e.g.
Code: echo !HH | nc 192.168.1.6 80
I obviously never get an answer since the request is passed via eth1. Using the -g option with netcat doesn't work either. I had a look at iptables but it doesn't seem to be able to do what I want. How I can still use eth0 as my communication port to the controller whilst eth1 is the default gateway?
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Jul 1, 2010
I have two servers on a vlan at my datacentre/colocation and previously both servers had public IPs on their eth0 interfaces. The servers are HP ProLiant DL360s - one is a G4 and one is a G5 The newer G5 is now the LAMP server and the G4 has been retired and I want to repurpose it as an iSCSI target using openfiler freenas or similar.
My G5 has public/static IPs lashed to the eth0 physical interface and the eth1 is not configured to do anything yet. The G4 will have both interfaces available - perhaps one for ssh access from one of my static public IPs and the other to be a private IP on the local vlan. Here is what I am trying to get my head around...
The G5
eth0 - Public IP - full LAMP services on two or three virtual interfaces
eth1 - Private IP 192.168.0.1
The G4
eth0 - Public IP for ssh
eth1 - Private IP 192.168.0.2
Because my traffic between eth1 on these boxes is via private IPs on the local private vlan it doesn't add to my quota for bandwidth. How do I go about configuring the routing and gateways and other aspects of this so that I can run a private IP space network between the eth1s and still serve the outside world from the eth0s...
I am afraid that if I assign the private IPs to the eth1 interfaces the routing may either not work or interfere with the access to the production internet facing interfaces (eth0s).
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Dec 18, 2010
I'm running a dual boot Ubuntu 10.04/Backtrack 4 (Ubuntu 8.10) system. I can get internet in the BT4 side but not in the Lucid side. In Lucid I can ping my router, and the network manager says I'm good to go, but I can't get to any web sites. It all started when I tried to put my laptop on another network by mimicking the settings of a computer I had just unplugged from the network. MAC address and all.
ifconfig eth0:
Code:
eth0 Link encap:Ethernet HWaddr 00:1f:16:ba:4c:8c
inet addr:10.136.9.147 Bcast:10.136.9.159 Mask:255.255.255.240
inet6 addr: fe80::21f:16ff:feba:4c8c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
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Nov 22, 2010
Is there a method of changing the Primary DNS other than system-config-network?When using system-config-network the new settings are always over written with the original settings after re-boot.
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Mar 9, 2011
So i was searching around my big desktop was working fine by default but I couldn't figure out how to switch my primary monitor and all the threads on this topic where real old and the fglrx drivers kept messing me up
so I went to my profile and showed hidden files and found a cool .xml file called monitors under .config
opend it up and chooses the primary monitor I wanted
very Nice Yes
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May 9, 2011
I have first installed Windows7 to sda2 (sda1 being the MBR). Then I installed Ubuntu as follows: sda3 /boot, sda5 swap (sda4 being the Extended partition), sda6 /, sda7 /home. So far so good. Windows and Ubuntu worked fine. I also planned to create another partition for data and two more partitions for Arch Linux. And here is the problem.I just assumed that the Extended partitions were created logical but actually they are also primary. So, as things stand, all my 7 partitions are primary and I cannot create any more partitions.I must've erred somewhere during the Ubuntu installation. Is it possible ti change the Extended partitions into logical, without affecting all the stuff within? Any ideas? Otherwise I will have to delete everything after Windows and install Ubuntu again, making sure that I create logical partitions in the Extended part
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Nov 3, 2010
linux newbie and i made a mistake while installing windows and linuxI made 4 primary partitions for my HD as i didnt know that only maximum 4 primary partitions are allowed.Now 25 GB of my HD is wasted. It is shown as unusable.CAN ANYONE PLEASE TELL ME IF I CAN CONVERT MY WASTED 25GB INTO SECONDARY AND USE IT WITHOUT FORMATTING AND RE PARTITIONING MY ENTIRE HD ???
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Mar 10, 2010
I just installed Ubuntu 9.10 this evening. I have a Nvidia Geforce 8500GT video card with two monitors hooked up (one to the cards VGA, the other to the DVI). I installed Nvidia drivers and Ubuntu is working with both monitors fine.
The problem I am having is it chose the monitor plugged into VGA as the primary (uses that monitor for the toolbars) when I really want them to go on the monitor that is plugged into DVI. Is there anyway for me to switch which monitor Ubuntu treats as the primary?
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Apr 8, 2011
I have google'd the crap out of this and have yet to find a "solved" forum. I currently have 2 sapphire ati 5770's in xfire. I also have two monitors. My (preferred) primary display has a dvi input and my other display is hdmi. I have them both plugged into only one of the cards. For some reason it keeps setting the hdmi display as the primary. And I want them in extended view. The ATI CCC suite does not support changing the primary monitor and I have tinkered with the xconfig but I do not really know what I am doing, so I have ultimately not been successful. here is my xorg.config file.
Code:
Section "ServerLayout"
Identifier "aticonfig Layout"
Screen 0 "aticonfig-Screen[0]-0" 0 0
EndSection
[Code]...
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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 23, 2011
I looked at the /etc/rc.d/rc.inet1.conf file it says something completely diff than the iwconfig. iwconfig is saying there is no wireless extensions on lo and eth1 but on eth0 all my info is there now on the conf file it says and ip address on eth2 and nothing on eth 0, or 1. does anybody know why it keeps jumping back and forth? one week its eth0 and maybe 2 months from now its eth1.
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Sep 11, 2010
I run a dual-screen setup, and the installation detected both screens without troubleowever I want to change primary screen, so the panels and menus will be located in the biggest monitor.I am not able to do this in the System -> Preferences -> Monitors interface. Where can I do this simple operation
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May 21, 2011
i have a two node drbd cluster, while drbd1 is primary and drbd2 is slave i should make drbd1 slave and unmount drbd partition and make make drbd2 primary and mount drbd partition to see content on drbd2is it any way to automate it so as drbd1 goes down, drbd1 make itself primary and mount the partition?
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Dec 26, 2010
i install kernel rpm after i boot that kernel network not working kernel name : kernel-rt-trace-2.6.24.7-132.el5.centos.i686 [URL] error "Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring."
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Jul 30, 2010
I try to generate a server client code. What i try to do is sending video streams from eth0 and eth1 to the other server programs' eth0 and eth1. In order to do that, i decided to use SO_BINDTODEVICE. But the code is not working. Am i misunderstood the usage of SO_BINDTODEVICE.
1-Defining two ports
2-Defining two sockets
3-Assigning host ips on them
[code]....
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Jun 22, 2010
I'd like to ask you all for a simple thing on Slackware that I dont know how to do under RHEL 5.4.
Under Slackware 12.2 it is easy to change eth0 to eth1.
This should be done in file: /etc/udev/rules.d/75-network-devices.rules:
Code:
Code:
Well, under Red Hat it looks slight diffrent. It looks like RHEL does not use udev ( correct me if i am wrong but there is no simillar file in /etc/udev/rules.d and cant see any script in /etc/init.d/).
I have found that all NIC configuration is stored in /etc/sysconfig/netwotk-scripts/ifcfg-ethx.
On this file it is possible to place varible: HARDWARE=
However after reboot it doesnt work. So, my question is - how to assign eth[number] to specified MAC-addr ?
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Dec 4, 2010
I'm using F12 on an old box which I have fitted with a new networkcard. I'm using the box as a music server (Twonkey) and want to use the new card (gigabit - eth1) as the default, but seem unable to. I can't switch of the mainboard ethernet option (eth0) in the bios and have tried to change the settings in the ifconfig-eth0 and -eth1 files by changing the hardware addresses as elsewhere recommended, but that doesn't work. During start-up it then gives me an error message that the MAC number was not the expected one. This would indicate that the network options are kept/read elsewhere. I'm not very familiar with Linux/F12. how to make the card the default option instead of the mainboard option.
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Mar 5, 2011
I recently installed language packs for Japanese and changed my system language to it, too. The problem is, now that I try to go back to English, the locale doesn't change back, only the menus are in english. "Apply system wide" in the Language Support didn't do anything; Firefox is in japanese too. Here is my locale output:
LANG=ja_JP.utf8
LANGUAGE=en_US:en
LC_CTYPE="ja_JP.utf8"
[code]....
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Sep 27, 2010
I have a hardware device with two ethernet ports, eth0 and eth1 running Centos 5. Basically my goal is to forward packets from eth0->eth1 and eth1->eth0 as well as get a copy of these packets for analysis. If I set IP routing to do the forwarding then I won't get a copy of the packets for analysis.
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Jan 29, 2010
i have just installed fedora core 12. my pc has 2 lan adapter. 1. onboard rhine. 2. intel card. os has given eth0 to onboard card and eth1 to intel but i want eth0 to intel card and eth1 onboard card.
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Mar 28, 2010
I've installed Arch Linux onto my Western Digital SATA drive.I love it, best ever, however, I need the fglrx proprietry driver for better 3-d performace, and decided to create a new partition. I decided to install Linux Mint.Sadly, in all my noobishness, I forgot about the 4 primary partition limit (oops!) and as I have /, /home, swap, and /boot partitions (all primary) already installed, I have run into a bit of a problem.I resized my /home partition (almost 500GB) to about 225, and was then told I have over 200GB unusable space. Is it possible for me to change at least 1 of my primary partitions to logical partitions AND keep all the data intact (AND edit the arch configuration so that it'll still work) so I can install a second linux? I sincerely doubt it
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Oct 19, 2009
i want secondary users can able to change the files permissions of primary group?user MAC is having www as a primary and httpd as secondary group. But he want to change the file permissions (chmod) httpd group files. Is it possible or not? I think its not possible. If it`s possible then let me know how?
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Apr 30, 2011
was the owner of 10.10 and i like the old interface. how to get it back? its a whole new installtion.
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