CentOS 5 Networking :: Which Command Can Check If Network Card Is Connected With Media
Nov 26, 2009
Suppose that it is not convenient to go behind a machine to have a look.So I want to use a command to show whether the cable is plugged into network card. (Media connected or not)Can ifconfig do this? Or another one?
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Apr 3, 2010
I installed the driver for my network card. iwconfig and ifconfig are all responsive to connecting to the network, I'm given an access point address. Then, I try to connect to a website and no dice. ping www.google.com yields no result. What gives?
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Dec 22, 2009
I have a Netgear WG511GE PCMCIA card, and a driver from the original installation disk. I used an ndiswrapper-utils gui called ndisgtk to install the driver. I then do the following to verify an installation:
[Code]....
Unfortunately, when I put the PCMCIA card in, nothing happens. On Windows, a green light flashes even if the card is not connected to any network. At first I thought this might be a hardware issue, so I did #lspci and got:
[Code]....
Lo and behold, when I put a different unbranded Wireless PC Card in it works. I'm no expert in Networks, but to me this suggests a driver problem (i.e. the card is physically detected it just won't work). However, the correct driver was installed with ndisgtk and this was verified with #ndiswrapper -l, hence the confusion.
I'd be grateful if anyone else has had this problem/knows of this problem and is willing to share the solution with me/point me in the right direction. So far, Google has returned a few posts from a few years ago talking about patching kernels and manually building files etc (just before Prism54 became integrated into the Linux kernel).
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Sep 25, 2010
Would it be possible to insert another wired network card into the router-connected computer, share the internet connection and be able to transfer files between the two?
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Aug 25, 2010
I just upgraded from Ubuntu 9.04 64-bit, to CentOS 5.5 64-bit and my RT-73 USB network card doesn't seem to want to function. It always worked fine in Ubuntu by default (plug and play). Is there some setting I need to make to get this working?Even BT-3 (which is quite old) recognizes the RT-73.
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Feb 13, 2009
Can anyone please tell me the files that a network card needs to use - know it needs a file called ifcfg-eth0 in etc/sysconfig/network-scripts
What other files has information relating to eth0
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Feb 11, 2010
I am looking for a gigabit network card for my centos 5.4 server. I am looking for something known to work well with linux. I have been on the bestbuy site and I found a DLink (DGE-530T) card with support for linux from the vendor but after reading feedback from users with that card I am not so sure it is linux friendly. I am now thinking of buying online.
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Oct 2, 2010
I can't get wake up on lan (wol) to work on my network card.The strange thing is that before I had it working with the exact same hardware. But I was on Centos 5.4 then. Now I am on Centos 5.5.Am I correct in concluding that the sky2 driver does not support wake up on lan?
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Jan 21, 2011
I had installed a Centos 5 server, with one network interface card and work find. Now I want to install ADSL (PPPOE) dial-up for internet in this server, so need to add a 2nd network interface card (RTL8139D or other) . After plug the network card, what I need to do in Centos to find this new card and config it?
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Jun 30, 2009
I've just set up a PC with CentOS 5.3 runing on near identical hardware to an existing 5.2 machine. Motherboard is Asus M2A-VM which I discover by chance generally works very well with CentOS. Ethernet is on board Nvidia.The older machine just did run gigabit speed without any intervention at all, rather to my surprise. The newer machine insists on running at 100 Mbit which is annoying as it is connected to a NAS through a gigabit dumb switch.
The obvious difference between the two is that ethtool on the older machine says that supported ports are TP, and so the port is TP. Whereas the newer machine says that supported ports are TP or MII and insists on running MII. I cannot change this with ethtool -s eth0 port tp. Perhaps not too surprisingly, mii-tool says that the supported speeds range up to 100 Mbit.
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Jul 28, 2010
I have just installed CentOS and it is working fine!I made a masquerade with the document there: I didn't used the script, because right now, I do not completely understand it, and obviously I am not modifying anything by leaving it like that.I was using Mandriva before and I am used to graphical tools My questions are:I add the following lines in my iptables:
[root@localhost ~]# service iptables stop
[root@localhost ~]# iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
[root@localhost ~]# service iptables save
[code]....
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Mar 20, 2011
I have a script with a command that requires a network connection.
It worked fine with an ethernet connection but on changing to a wireless one, its stopped working.
Question: how can I delay a script command until the network is connected?
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Dec 9, 2009
I installed Centos server and when I type this command to edit my network IP address I get this error.
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Dec 22, 2009
I would like to know the command to check the NIC interface in redhat linux.I know ifconfig works, but is there any specific command shows the the interface which in disabled mode too ..
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Apr 22, 2011
I'm trying to connect the Reliance 3G data card in Ubuntu 10.04. I've done modprobe then make settings in /etc/wvdial.conf with username and password field as empty string. But when I'm trying to connect with sudo wvdial it is showing that "Modem is not responding" and exit. However, the same procedure with Reliance netconnect+ which take a username and password, working well. Does 3G needs some settings?
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Nov 12, 2009
Can anybody tell what command can be used to check the checksum for a file or to match the checksum with the one provided by the download provider.
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Feb 27, 2011
I have a CentOS 5.5 server running currently with a Netgear gigabit ethernet card and for wifi I have a wi-fi card with the chipset: RT2860.Now I have gotten the ethernet card and wi-fi card working but my main question is: How do you bridge the connection between the ethernet card and the wi-fi card to create a wireless network with a hidden ESSID if possible and WPA encryption? (So the server basically acts as a wireless router as well as doing all the other stuff I need to do on it).
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Mar 16, 2010
I have to connect to my university's network. I was using ethernet through our router, but now I cannot do that. I recently installed the TRENDnet TEW-643PI and it works perfectly on the Windows 7 partition. Is there anyway to get the card working on Ubuntu without being connected to the internet?
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Jun 14, 2010
I'm using CentOS 5.5 as a media server to stream media content over my local network. Currently i'm having problem while installing last.fm scrobbler.
Here is a sample output:
yum localinstall xmms-scrobbler-0.4.0-7.fc11.i586.rpm
Loaded plugins: fastestmirror, priorities
Setting up Local Package Process
Examining xmms-scrobbler-0.4.0-7.fc11.i586.rpm: xmms-scrobbler-0.4.0-7.fc11.i586
Marking xmms-scrobbler-0.4.0-7.fc11.i586.rpm to be installed
Loading mirror speeds from cached hostfile .....
The program package-cleanup is found in the yum-utils package.
Upon searching my hard disk this is what i get:
find / -mount -name libcurl*
/usr/share/man/man3/libcurl-easy.3.gz
/usr/share/man/man3/libcurl-tutorial.3.gz
/usr/share/man/man3/libcurl-share.3.gz
/usr/share/man/man3/libcurl-errors.3.gz
/usr/share/man/man3/libcurl-multi.3.gz
/usr/share/man/man3/libcurl.3.gz
/usr/lib/libcurl.so.3
/usr/lib/libcurl.a
/usr/lib/libcurl.so.3.0.0
/usr/lib/pkgconfig/libcurl.pc
/usr/lib/libcurl.so
So it tells me that I need libcurl.so.4, but I couldn't find any suitable rpm binaries for it. The only rpm that i found was for Suse and Mandrake. How to set this up, so that i can get a fully functional media server.
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May 1, 2009
I just have CentOS installed and cannot get the Agere et131x network card to work.I have tried the following:Reboot the computer and still did not see the network hardware.
Fai
lspci
Quote:
[code]....
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Jun 8, 2010
With what command i can check whether my Ethernet card supports gigabit speed Ethernet or not?
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Feb 24, 2011
On the 25th of January, one of my computers randomly stopped being able to connect to the Internet. It was running a dual boot (Ubuntu 10.04.1 LTS & Windows XP SP2), and is connected to the network via an ethernet cable (no wireless). According to the Network Manager, everything is working okay (there was no change from when I was able to access the Internet).
When I would use Firefox, I would get the message "Waiting for (page)...". However, this is not a Firefox only problem, as every program requiring Internet access (e.g. Evolution) is unable to connect to the Internet.
I compared the Internet settings to those of my father's Windows XP SP1 computer, which is able to connect to the Internet. There was no difference, except for the IP Address and Hardware Address. Because of this, I incorrectly deduced that either the actual Ethernet cable or the wall plug was faulty. I tried using a different cable and connecting to the Ethernet wall plug used by the aforementioned computer. Nothing changed. I was still unable to connect.
I didn't worry about it until Tuesday, when my other computer had exactly the same problem. It is running a triple boot between Ubuntu 10.04.1 LTS, Ubuntu 9.04 and Windows XP SP2, and I am unable to obtain Internet access using any partition. As with the previous case, my computer showed no change in the Internet settings, and the computer also shows it as being connected to the network. It is also connected via an Ethernet cable.
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Mar 13, 2011
I have a Toshiba Satellite L505D-GS6000, and I installed Ubuntu before and it worked flawlessly until I decided that I had to go back to Win7 because of certain program compatibility issues.I'm back here trying to set it up and am having no issues except for with my wireless. I can see all of the SSID's, I am able to connect to my wireless, and it displays that I have been assigned an IP and all of the other settings given by DHCP.
I have been trying to fix this for hours, googled, searched these forums, and have spent time with some people on the Ubuntu IRC channel and we are unable to come up with a fix.
Print out of sudo lshw -C network:
Quote:
*-network
description: Wireless interface
product: RTL8191SEvB Wireless LAN Controller
vendor: Realtek Semiconductor Co., Ltd.
[code]....
The strange thing is that although nothing will load when I try to visit facebook.com, google.com, or any other website... I opened the update manager and I noticed that it would download for 30ish seconds, stop and do nothing for 60ish seconds, resume for another 30, stop, resume, etc. until it finished. I am able to ping my router, and 8.8.8.8, but I am unable to ping [URL].
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Jan 16, 2009
I have a WET54g bridge that I am trying to get connected to a wireless network that only allows DHCP. The idea behind it is that I would like to connect the Cat6 out of the bridge to a switch allowing multiple wired computers to connect to the wireless network. The bridge will easily connect to the network once I put the WEP key in, however, there is a kink after that. When I connect the Cat6 to my computer and request an IP for that computer, it self assigns. This tells me that it is not talking to the wireless network through the bridge.
I can not find which IP address the bridge was assigned so that I can talk to it. The sub net is 255.255.240.0 which leaves quite a few possibilities. I know that the bridge is, however talking to the wireless network because the light is steady on the front of it which indicates just that. One other thing to stack on is that I know that there is a "splash page" which comes up when any computer connects. You click on the agreement and then you are allowed onto the network. How can I get my computer to talk through the bridge to the wireless network?
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Dec 10, 2009
I am using centos 5.4, recently i come to know that people are'nt able to connect to my system using ssh.1. but i can easily connect to them. 2. I checked the firewall settings also, it seems ok to me.3. I tried restarting sshd also. " /etc/init.d/sshd restart " but to no avail.4. Before when i was using 5.3, it was not a problem..!!5. I tried the following command on other system. It shows the following output.
# ssh -v -l niks 43.88.101.99
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
debug1: Reading configuration data /etc/ssh/ssh_config
[code]....
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Aug 9, 2009
I am trying to boot my laptop in text mode while it is not connected to a network. A message keeps popping up " eth0 ... negotiating". Does anyboy know how to turn it off? I tried "ethtool -s eth0 autoneg off. It still won't stop. I had tried editing /etc/sysconfig/network and turning off networking by NETWORKING=no. Still the same.
When I boot in the graphic mode, this problem of pesky message does not come out. I want to use the text mode since I will use my computer for editing documents and will be using vi only. In the text mode, when I plug it to a network, the persistent message stops but returns the minute I unplug the network. I want to use it unplug to the network since I will not have access to a network all the time. By the way, I am using Fedora 11. I am using a wired DSL network. My computer can do wireless but i had it disabled or switched off.
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Apr 24, 2010
I have installed Linux for the first time on an old Gateway purchased from work. The system seems up and running, but I can't get connected to my wireless or the wired network. I have tried using the network manager, but it isn't working. I have tried reinstalling Fedora 12 I have the following LSUSB and LSCPI output.
[Code]...
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Sep 7, 2011
I just installed a dualboot win7/F15 on my laptop (dell XPS 15) and everything seems to be working fine except that when I connect to my network it is connected and the network is accessible (I can visit my gateway/ router) but when I try to visit a website it simply never ends loading it.Internet is working on win7 so it isn't my network's fault.Now I found somewhere that updating could help but since I dont have internet I can't update
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May 6, 2010
I'm using Wordpress on Apache localy to keep a diary (it's convenient because of the tags).
When I'm connected to any network (be it wired or wireless) my Apache (and Wordpress, of course) works just fine. But as soon as I go offline, I can't access the web server neither through browser nor by telneting to the 80th port. Pinging localhost works just fine.Here is my ifconfig when offline and when online:Online:
Code:
eth0 Link encap:Ethernet HWaddr 00:24:54:6f:07:aa
UP BROADCAST MULTICAST MTU:1500 Metric:1
[code]...
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Jul 8, 2010
I'm having trouble pinging localhost, specifically, pinging localhost when I'm not connected to a network. When I try it keeps telling me the operation is not permitted:
Code:
matt@mubuntu:~$ ping localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
if I connect to the network, start pinging then disconnect it continues pinging. Google seems to think it could be something to do with my iptables setup:
Code:
matt@mubuntu:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
[code]....
When not connected to network
Code:
matt@mubuntu:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
But as far as I can tell there isn't anything in there which would stop me connecting to the localhost (I also can't connect to my local apache instance when offline)... (It's worth mentioning that a couple of weeks ago I had the pc setup to share it's internet connection with a laptop, ala this guide, however I've since disabled the iptables rules and disabled ip forwarding.)
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