Ubuntu Networking :: Find Computer Linked To Eth0 ?
Apr 28, 2011
I have a laptop at work, the user got logged out and now im unable to access it directly.
I have a work computer that is directly connected (through eth0) to my laptop, and that is still on:
ifconfig - on work computer
Code:
I want to run the command "sudo shutdown -r 0" on my laptop so that it will reboot... and then auto-login to the laptop again.
If i go to ping computer i get this:
Code:
That address is the one when it is connected through the wireless; but when it got logged out i guess it shuts the wlan interface off.
In short, i need to find the address of the computer on the other end of the eth0
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Mar 2, 2011
I'm not sure how long ago this happened but eth0 seems to have vanished from my computer. wlan0 works fine and when I plug into the switch there is carrier detect.
Code:
21:35:43 ~:$ ifconfig eth0 up eth0: ERROR while getting interface flags: No such device
21:55:49 ~:$ lspci 05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05) 07:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300 After that i have no idea where to search for problems next, any ideas would be greatly appriciated (can't spell) ubuntu 10.10
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Apr 20, 2011
I have a computer with two interfaces eth0(LAN) and eth1(WAN).I have followed some guides on the internet and came up with this iptables configuration:
# Generated by iptables-save v1.4.4 on Wed Apr 20 09:43:12 2011
*nat
:OUTPUT ACCEPT [0:0]
[code].....
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Jun 7, 2010
i want to find ip address of other computer which are connected in LAN..suppose ther are 5 compter in LAN and i want to find ip of all remaining 4 computer using my computer only in command or any other way is ther....
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Feb 20, 2010
I've got a shared (Windows/multiuser Linux) laptop, and I've got installed World of Warcraft and some steam games in Windows. With steam games, there is (almost) no problems. I've installed steam in Linux, and soft linked the 'steamapps' directory (per-game compatibility is another issue). With WoW, the problem is different. I would like to have almost (but not) all files. Under World of Warcraft, every file and directory must be linked except the Interface directory and WTF/config.wtf file (so every user can play with their own settings and addons). How can I have a mix of linked and not linked files without linking every file? If I link manually every file/dir, when updating from Linux other users and Windows Wow is not updated; when updating from Windows, new files remains "unlinked".
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Jun 15, 2011
I have in my ubuntu 3 eth?
eth0
eth1
eth2
just eth1 has an IP address...
I just have remote access to the server via ssh.
How do I find out which eth0 is a fiber nic ? Because I know one of them are.. but I cannot assign any IP address to them..
which eth? belongs to this fiber nic ?
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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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Nov 18, 2010
I've looked today on my logs /var/log/message and I find device eth0 entered promiscuous mode I don't remember putting eth0 in promiscuous mode I'm connected to the net thru a router how do i turn that off ?
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Mar 5, 2011
I have been trying to download different applications and some of them have two options i386 or amd64. How do I find which application it is on my computer processor?mk631219
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Jun 1, 2011
When I do service network start it is giving me the error grep : can not find directory ifcfg-ifcfg-eth0....
For some reason it is adding another ifcfg to my ifcfg-eth0 file.
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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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Feb 18, 2011
I have a linux machine on my university network where I usually log in via ssh from home. I have know the ip, so this is what I use to log in, but it would convenient to know if my computer have a hostname on the local network (it's easier than remembering the ip).I set up a hostname when I installed linux on my pc, but it's not the name associated with that ip on the network. Is there a way to find out if there's a name associated with that ip?
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Apr 4, 2011
just switched from Windows Vista to Ubuntu 10.10 on my Toshiba laptop and I'm loving it, except for some wireless connection problems. About 70% of the time, my computer is unable to find any wireless signals whatsoever, despite being right next to the router. When it does find the signal it connects fine and runs great, but most of the time it doesn't show any signals at all. I can't find any pattern to when it does or doesn't find the signal. My result for the "sudo lshw -C network"
[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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Jul 9, 2011
I've been trying to find a way to watch videos from my main desktop computer on another computer I've plugged into an HDTV. I'm such a Linux newbie that I decided to give Mythbuntu a try. It was way to complicated for what I needed, and I'm sure that some more experienced people reading my first two sentences laughed to themselves at my naivety.
What I am trying to find is simple: browsing one computer's home folder from another computer, and playing the videos therein. If there's anything like Mythvideo that requires less than half of the skill requirements, I will telepathically send love to the person that informs me of it.
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Apr 16, 2010
i encountered the following:
situation:
1 server with centos 5.4 running 1 client with centos 5.4 - gnome running thin ethernet network
on my client desktop i have a link to a shared folder on the server. this works fine.
to the problem: after working with this (using the link and seeing it working) i shutted down the server from my client (in a terminal screen, using ssh) the terminal screen signalled the server going down and the connection ended. the linked folder on the client desktop changed its icon fine.
after that i clicked on the changed icon (of the link that was not a working link any more) and the client machine froze.... no reaction any more. i could only end the session by >ctrl-alt-f#< , log in and shutdown.
Q: is it normal Centos is that angry when you click such a link?
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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 9, 2011
I tried for two days to install ubuntu server to my computer from a cd. Whenever I tried burning to a CD-RW (using two programs at highest and lowest speeds), my cd always said it had corrupt files. So I setup a virtualbox harddisk that was setup tonuse my slave harddisk and installed ubuntu server in virtualbox successfully. Now when I boot my server, it won't connect to my network. Long story short, I have taken lo out of my interfaces and tried resetting my dhcp ip address by releasing and renewing it using dhclient. I have realized that eth0 doesn't exist (it shows up in windows). I think that all I need to do is add eth0 to ubuntu...
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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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Jun 21, 2010
I am in need of finding out the physical interface corresponds to eth0,eth1,eth2., As similar like the lscfg command which is available in the AIX operating system. The output given below got it from AIX OS.
$ lscfg -l ent*
ent2 U787B.001.DNWFFC6-P1-T9 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent3 U787B.001.DNWFFC6-P1-T10 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent0 U787B.001.DNWFFC6-P1-C4-T1 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent1 U787B.001.DNWFFC6-P1-C4-T2 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
Is there any utility/commands available to find out the physical interface ?
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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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Mar 8, 2010
If I uncheck and recheck "Enable Networking" in the Network Manager Applet 0.7.996 I would expect the wired network to disconnect (which it does) and reconnect (which it does NOT). So I tried sudo ifdown eth0 and got
Quote:
Ignoring unknown interface eth0=eth0.
ifconfig tells me
Quote:
eth0 Link encap:Ethernet HWaddr 00:25:64:e8:18:2c
inet addr:192.168.0.112 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::225:64ff:fee8:182c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
so I am at a loss. How do I stop and restart the network interface short of rebooting the machine?
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Aug 18, 2010
I set up a dhcp server in the lan and assigned static ips to two computers, computer A and B, according to their mac address. Everything was running fine. But when I turned off computer A, connected computer C to the network, and assigned computer A's static ip to computer C without changing dhcp setting. Computer C was able to access the internet. When I turned on computer A, dhcp couldn't assign an ip address to it, and computer C showed an error message of ip conflict and failed to use internet. I wonder if dhcp server is able to prevent other computer from using the same static ip that is already assigned to a computer according to its mac address.
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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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Nov 11, 2010
My wifes networked computer connected to the network just fine when it was Win XP. Now that Ive converted it to 10.04 (completely) it can see the network, but it just wont connect to it. I had no problem converting my computer to Ubuntu and it sees the network and accesses it great. Files, folders and hard drives are all shared. So, one computer connects great, the other does not.**I dont know what to do at this point.Here is the layout:My Comp (10.04) ---------......Main Network Comp (XP)Wife Comp (10.04) -------/The main network computer is XP as it has software on it we need that does not work in Wine. The main computer will have to stay XP. I cannot get my wifes computer to connect to the main system, although mine connects just fine. I dont know what the problem is. Her computer sees the network, but when trying to connect, it times out and says unable to connect.
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Sep 10, 2010
I have two Linux computers and one small home router with DHCP functionality. I configured the router with the "dynamic DHCP" setting, ie, the static DHCP with MAC-Address was not used. Before that, I used the manual IP configuration, defining the two computers' names in the /etc/hosts file.
Example:
10.0.0.2 comp2
10.0.0.3 comp3
Now, with DHCP, the above example is no longer appropriate, because the DHCP server is supposed to tell the computer what IP number it will receive. However, I am missing something, because I haven't figured it out yet how to make one computer know the other computer's name. Is it that I haven't installed a name-finding package? Is there a simple way to accomplish this (one computer finding the other computers' names)?
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Sep 21, 2010
I have ubuntu server installed on a pc. The motherboard died, so I switched the HD to another computer. Everything is fine except the network. I cannot access this computer from other computer (while it was possible before). I looked at the interfaces and everything seems fine. The nic itselft seems to work too.
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Jan 26, 2010
How do I find out if my computer is 64 bit or 32 bit? I already have ubuntu installed.
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