CentOS 5 Networking :: After Restarting - Network Won't Load / Resolve This?

Feb 26, 2010

It is really a problem that drives me crazy.

Every time after restarting my Linux machine, Network won't load and i can't activate eth0.
After multiple restarts it comes activated but i am sure it is not what makes it to work.

Can some one ever heard about such situation?
I have a 3com Ethernet adapter.

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Ubuntu Networking :: Restarting Network On Boot

Jan 6, 2010

I'm wanting my linux machine to set it's network settings during boot, so I've done the following Changed my /etc/network/interfaces to


auto lo
iface lo inet loopback
auto wlan0
iface wlan0 inet static


Ok so it boots up ok and it's sitting on the login screen, when I try to ping it however it doesn't reply!

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Networking :: Dhcp Not Working After Restarting Network ?

Jul 12, 2010

I installed dhcp on my Debian server and it was working fine.

untile I restart network with this :

And then dhcp was not working.

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General :: Getting Error During Restarting Apache / Resolve This?

Feb 14, 2010

I have just compiled apache with the following command code...

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Networking :: Re-enable Network Access By Restarting NetworkManager?

Jun 12, 2009

Ubuntu desktop 9.04 Whenever I try to copy files to any machine on the network, the transfer stops and I no longer have access to the network or the internet. This happens whether I'm doing scp, copy with the gui, when copying to windows machines, and when uploading database files with phpmyadmin. I have been able to successfully transfer large amounts of data outside of the network via ftp, but not to any on the network. I've discovered that I can re-enable network access by restarting NetworkManager.

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Fedora Networking :: Unplugging Network Cbl - Restarting Service Crashes FC12

Feb 2, 2010

The system will also crash when booting if it is not plugged in. However, this behaviour is not consistent. The crash is not really a crash so much as a complete system freeze, where not even the numlock light on the keyboard will turn on or off. I have to do a hard reset to get it going again.The last entry before the reboot in /var/log/messeges just shows eth0 link going down.

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CentOS 5 Networking :: Unable To Resolve Anything Via Dns?

May 31, 2009

cant resolve anything via dns, can ping ips though, traceroute shows that traffic is going through.

[root@home ~]# uname -a
Linux home 2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:35:59 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
[root@home ~]# route -n[code].....

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5 Networking :: Centos 5.4 Cannot Resolve Private Dns Ips / Fix It?

Oct 2, 2010

I has used centos for all my servers but today i have problem with my router.

I install and configure my router/gateway as follows code...

at previous configuration (centos 4x) everything work well with those configuration but when i use centos 5.4
all my client cannot browse the Internet, its only work when i put the ISP dns (221.321.32.15)

i want my client use as DNS.

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Networking :: Cannot Browse Network From Ubuntu / Resolve This?

May 23, 2010

I cannot browse the network from Ubuntu, but I can see the ubuntu machines from the windows including file and printing.
Nautilus gives the following error:
Could not display "network:///".
Nautilus cannot handle "network" locations.

Workgroup names all set the same
Sharing allowed on all machines

I have read all of the postings on this I think and have not been able to implement a solution.

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Networking :: Can't Get To Internet With My Centos System / Resolve This?

Nov 24, 2010

I recently configure a centos linux distro to use on the internet.my actual plan is to use it as a router to the internet for computers on my network. the system already has two lan cards which i have configured with their appropriate ip addresses. now with this initial configuration i believe i should be able to browse the internet, but my problem now is that i cant even though the lan card pointing to isp is correctly configured with the ips,gateway and dns from my isp. i cant even do a ping to the outside world.
I cant really pin point where the issue is coming from but i am guessing maybe my route are not well configured. i get ''unknown host google.com" message when i ping google.com and a ping to my gateway address gives '' Network is unreachable". i have been using this system before as my gateway, but only recently switched isp and i started having this issue when i reconfigure the system to my new isp settings. Now, on a windows system, all goes fine so i have been able to safely remove the fact that maybe it is from my isp from the picture. How do i resolve this?

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Ubuntu Networking :: Resolve Local Network Names?

Mar 27, 2010

I'll apologize in advance for I'm sure this has been covered already, but I'm not sure of the search terms to even use to begin solving this problem. I don't know what I don't know.

I have three computers on my home network and want to reach them by their name instead of IP address since their ip is dynamically assigned. I'm using a Linksys WRT54GL router and have noticed that there exists a "DHCP Clients Table" in the router that seems to hold all the necessary information - host names and ip addresses.

How can I get my computers to use that as the lookup table to resolve the host names? And is this even an optimal way of being able to resolve local names?

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Ubuntu Networking :: Can't Connect To Wireless Network / Resolve It?

Sep 5, 2010

I am using an Asus EEE PC 900HD netbook and lately Ive been having trouble connecting to my wireless network (WPA2 secured). The WiFi adapter is a RealTek RTL8187SE. Every time I try to connect Network Manager prompts me for my WPA2 wifi security key, which already happens to be entered in the prompt. I then press Connect but after a while the prompt with the password already entered appears again without connecting to the network. I should point out that this issue only seems to happen on this network.

All other networks (including other WPA2 networks) I can connect to with ease. I have MAC address filtering enabled on this network and have the MAC address properly entered in my router and have been able to connect to my network in the past until now. I believe this is a problem with gnome-keyring as I when I first started using Ubuntu on this computer (9.04) I got confused with the whole default password for keyring thing and I messed it up so that every time I connect to this particular network the Network Manager prompt would appear and I would have to press Connect to connect to my network

[URL] I also tried deleting all my network connections and reconfiguring them to no avail. In my troubleshooting I did make an interesting discovery however. I plugged in a USB WiFi adapter (RealTek RTL8187B) thinking I could at least connect to my network and browse these forums for a solution to this problem. The USB adapter connected to the network and I was able to brose the Internet. I then disovered that I could go into into Network Manager and get the other adapter to connect. I coud then unplug the USB adapter and the other adapter stays connected and works flawlessly. how can I get my netbook WiFi adapter to connect to my network automatically?

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Networking :: How To Resolve Hostnames On DHCP Home Network?

Jun 28, 2010

(although I'm running Solaris, I've posted here as I expect Solaris/LINUX is irrelevant) - more of a general network Q.I have a PC running Solaris 10 (hostname MARKUNIX) and a laptop running WinXP (hostname MARK-LAPTOP). Both are connected to broadband via a router. IP addresses for each are determined via DHCP (192.168.1.nn) and I do not leave either on, 24x7. I am running Oracle on MARKUNIX and want to be able to refer to it by hostname when using Oracle tools on my laptop.Each machine can ping each other ok by ip address and curiously the Solaris PC can ping MARK-LAPTOP (I'm not sure how it resolves that?) - importantly the laptop cannot ping MARKUNIX.Now I could add MARKUNIX to my laptops hosts file but that would mean changing the file each time I boot up as the ip address for MARKUNIX will keep changing (DHCP).

Is there a way to refer to MARKUNIX without having to keep changing ip addresses and use DHCP? As I understand it the 192.168 address is private and is not really the 'real' ip address and as such can be manipulated(fixed?) even whilst using DHCP?Am I right in thinking that a static ip from my broadband supplier is the ip of my connection (router) and I'll still have the same private network referencing issues?What I've covered above pretty much is the extent of my knowledge of networking so bear that in mind please.

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CentOS 5 Networking :: CIFS Mounts Hang When Pushing Data / Resolve This?

Apr 9, 2009

Ive seen this a hundred times while searching google but I can't seem to get any of the fixes suggested to work for me.

Here are the specs code...

I have other servers on the same network with the same software/hardware that never loses its mount to the windows share, and nightly backups are run through those mounts. So why does the mount on this machine fail when we do a push? The only conclusion that I can come to is there is some sort of time out on the windows server that causes this. The other servers that have this same type mount use their share every night, where as the share on this server gets used once or twice a week. Once the mount hangs I can not unmount it, I have to reboot the server. Once the server is rebooted the push works fine. But then the next week when a push is tried it hangs. What else can I check?

UPDATE: I've also tried NFS mounts and autofs mounts and they hang as well

I enabled logging by echo 1 > cifsFYI and this is what I see in var/log/message code...

Ive removed the actual file names for security concerns. Any one have ideas as to why this is happening? The only other thing I can think of to try is to swap out the NIC but it's at a remote location so I can't do that right now.

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CentOS 5 :: After Restarting Apache Site Is Down?

Apr 7, 2011

after restarting Apache site is down?

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General :: Restarting Network Devices Remotely?

Oct 4, 2010

I have a machine with several IP addresses with eth devices like eth0, eth0:1, eth0:2, eth0:3. Can I restart only eth0 without bringing down eth0:1? It would be really convenient to be able to log in via SSH on eth0:1 and restart eth0 without locking myself out or not being able to bring the network back up.

If I stop eth0, will that automatically stop all the others?

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Ubuntu :: Error On Restarting Network Service

Jun 1, 2011

On restarting networking service, i am getting the following error,

karthick@karthick:~$ sudo /etc/init.d/networking restart
* Reconfiguring network interfaces.. ssh stop/waiting
ssh start/running, process 5427
start: Job failed to start
[ OK ]

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Server :: Error When Restarting Network Service

Jun 19, 2011

I use red hat linux. When I start up network service. I get below error in eth2
root@vls etc]# service network restart
Shutting down interface eth2: [OK]
Shutting down loopback interface: [OK]
Bringing up loopback interface: [OK]
Bringing up interface eth2: RTNETLINK answers: File exists
Error adding address for eth2. [OK]

I paste the ifcfg-eth2 in here
[root@vls network-scripts]# cat ifcfg-eth2
# Intel Corporation 82572EI Gigabit Ethernet Controller (Copper)
So, what is the problem of error adding address?

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CentOS 5 :: Web Server (Apache) Keeps Stopping And Restarting?

Oct 17, 2009

I am having a problem in that the Web Server (Apache) keeps stopping. I know this as watchdog is emailing me. Then about 15mins later it starts again. I cannot seem to find why. can anyone give me pointers as where to look to find the issue.

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CentOS 5 :: Restarting A Service Automatically When It Fails?

Jun 25, 2010

So far I have came across three options.

1. Watchdog script
2. Daemontools - using "supervise"
3. Monit - open source monitoring tool

From what I can gather, daemontools is probably the best option. Unfortunately, the documentation on the developers site is very vague and I'm having a hard time getting this to work. I think I have it installed correctly, just don't know how to apply it to the service I want monitored.

how to get daemontools to work. All I want to do it monitor a server on my linux box. When it fails, I want it to be restarted automatically.

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Ubuntu Networking :: WiFi Network Won't Load

Mar 3, 2011

when it boots it doesn't ask me for my password (not the one to WiFi network, but the one to 'default key base') and because of that I can't connect to my WiFi network. The network itself is working fine. So i restart my computer (sometimes I have to restart it 15-20 times) and finally Ubuntu asks me for my password I type it in and everything works fine. what should I do with this?

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Networking :: Domain Won't Load From Local Network?

Feb 15, 2011

Have a domain registered on a public ip. The domain server for the domain is on the same local network as the web server that uses the domain. The web server naturally has a local and public ip address.

The problem is that whenever I try to access the domain from my local network the lookup for the domain fails, as it cannot find the server from the local network. What's the most painless solution to this problem?

TL;DR: need for my domain to be accessible from both my local network and the outside world, now it's only from the outside which is a problem.

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Ubuntu Installation :: Can't Load Java 6 / Resolve This?

Nov 5, 2010

Just created a partition to run Ubuntu 10.04. Need to execute an Xcel spreadsheet that requires Linux and a JRE from Java. ATT is my DSL provider, but they do not support Linux, so I have no internet connectivity. I downloaded JAVA 6.0 from another machine and attempted to load it - with no success. Two days of no success! I run OS X and Windows 7, but Linux is new to me. I'm trying, but I'm missing something.

Here's the file on my desktop...


It opened from the native download...


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CentOS 5 Networking :: Can't Load Ipip.o And New_tunnel.o?

Sep 28, 2009

i am trying to configure advanced routing on my centos 5. i have try to load ipip.o and new_tunnel.o by menuconfig on kernel option and add tunneling and the two modules. the issue occured when i type make to reconpile the kernel , i receive the message below.

[root@mblpbx01 2.6.18-8.el5-i686]# make
scripts/kconfig/conf -s arch/i386/Kconfig
CHK include/linux/version.h
CHK include/linux/utsrelease.h


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CentOS 5 Networking :: How To Enable Load Balancing In Box

Oct 27, 2010

I am using centos with two physical LAN cards. Some times one of our internet link goes down so the entire network stop. Now there are two different ISP internet lines coming into a single computer in their respactive lan cards for load balancing.
Kindly guide me that how can I enable Load Balancing in my Linux Box.

If one ISP goes down the load balancing server will use teh second one and vice virsa.

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Networking :: Calculate Overall Network Load And Cpu Performance Of A Client?

Jan 8, 2011

I wrote a script which sends the server,files from /proc/ like dev,netstat,loadavg etc of a client. i want to calculate the network load and the overall cpu performance of the client using the information from the files.I donot know how to calculate that as i have too many values in those. which values will be useful and how to calculate?

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Fedora :: Grub Doesn't Load After Adding HDD / Resolve This?

Aug 18, 2009

I have installed FC 11 on single SATA HDD. When I add IDE HDD grub doesn't load. I see string GRUB at top-left corner only.code...

I tried replace hd0 -> hd1 in grub.conf. But this doesn't solve problem. What I must do?

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Installation :: Can't Load Windows 7 After Installing Ubuntu / Resolve This?

Oct 16, 2010

I have Windows 7 on SSD and have installed Ubuntu on a separate HDD.
When the PC boots, I get the boot manager menu, if I choose Windows 7 it fails with error "no such device or partition".

I can mount the SSD and see all the Windows files still there, I think that the boot manager just needs to be pointed in the right direction but not sure how.

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Slackware :: Dvb / Video Modules Won't Load On Current - Resolve This?

Mar 3, 2010

Tried to get my VDR working again, but the dvb modules refuse to load code...

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CentOS 5 Networking :: IPtables Module Load Fail

Apr 10, 2010

I'm encountering a known problem with IPtables. I set up rules and apply them, restarting firewall, then I get this message:

Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: raw nat mangle filter [ OK ]
Applying iptables firewall rules: [ OK ]
Loading iptables additional modules: ip_conntrack_ftp ip_conntrack_netbios_ns [FAILED]

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