Ubuntu Networking :: Server 10.04 Network Troubleshooting?
Sep 1, 2011
I've got a server that I've been trying to get Ubuntu Server 10.04.01 LTS installed and running on and I've gotten incredibly close to having it work, but the Network is still giving me issues. The installer went off without a hitch (once I fixed some optical drive issues) and it has actually detected the "Intel Corporation 82576 Gigabit Network Connection (rev 01)" Dual-port onboard NIC which shows up when I run lspci. I statically assigned an IP, Subnet, DNS Server and Gateway to eth0 and things looked good. ifconfig showed that it was "UP", and I could ping localhost, but if I tried to ping anything on the LAN it said "Destination Host Unreachable".
Here's the ifconfig and lspci (snippet)
======== ifconfig ========
eth0 Link encap:Ethernet HWaddr 00:25:90:2d:26:98
inet addr:172.30.1.75 Bcast:172.30.3.255 Mask:255.255.252.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
[code]...
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Jul 9, 2011
Just installed ubuntu 11.04 on an old pc. At first, I was unable use my wireless usb adapter (netgear wpn111), but was successful after installing ndiswrapper-common and ndiswrapper-utils-1.9 manually. cool! then I updated all packages successfully via synaptic package manager and rebooted.now I have lost network connectivity. the os still sees the wireless usb adapter, but I have no connectivity. the indicator applet shows an exclamation point.
How can I troubleshoot this? are there logs? can I fallback to a previous good state?I am new to ubuntu, but experienced in unix. note: my pc only has 1/2 GB memory if that matters. but, hey, it worked once.
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Aug 16, 2010
I have had no problems connecting to any of my wireless networks in the past. Right now I am at a friend's house and can't get internet access with my laptop. I have entered the appropriate fields in /etc/network/interfaces (as I usually do)
auto wlan0
iface wlan0 inet static
address 192.168.2.64
netmask 255.255.255.0
broadcast 192.168.2.255
gateway 192.168.2.1
I checked this info with the router's web interface and everything seems fit. The network does not have a password. I have tried adding "wpa-ssid belkin5g" and "wireless-ssid belkin54g", and neither one works (can't ping the router after bringing wlan0 down then back up). I have also tried connecting with DHCP instead of setting a static address.
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Mar 27, 2010
I have been trying to accomplish this feat for about a week now, and I always seem to get a boot up error.
Here is how I call WinPe from my default file
Code:
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May 13, 2011
The server is booting up properly and the system is running. When browsing web sites on the sever and they seem to run fine. But when you make requests to it, it seems to take a long time to process stuff. Such as large mysql request. Even to the point it freezes. It seems that if you make a request of some sort it just over loads. I have checked the logs and the most I can get from it that one of my wiki sites that seem to be getting nailed with spam bots trying to getting which is one of the databaes that where repaired could be slowing it down A LOT. Now I did find a couple databases that where marked as crashed and they have been repaired. I am not really sure what is causes the errors since the HD space is fine, ram is fine, internet connection is fine...So I am not familiar with diagnoses linux as much as I am with a windows pc. I am not real shell friendly. I am not good with the basic troubleshooting commands to try and identify the source of the problem to correct it. Could anyone point me the way...
Thanks in advance and I apologize for being a ra-tard on these. I should know this stuff more than I do running a server like this. It was created in 2006 and has been problem free since. Another thing, mass emailing isnt working either. It may be mysqld related. Sorry for the fragments and such. It also seems the SMTP isn't working properly as well suddenly.
Another error I been seeing:
PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 16 bytesPHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 16 bytes some times I see this as a 32 or 64 bytes as well.
FTP Connection: It is also slow when making ftp connects. It is extremly slow but they finally do complete. It can be just a simple connection to display content. Slow.
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Apr 1, 2011
I installed Gadmin-Samba and a eth1. Setup the info in gadmin for waht I could follow and then shared the bub folder in win7. Have direct cable between the 2 nics, they see each other, however Win 7 says "unidentified network" (with a bench) and no connection established. In Ubuntu Places/network folder it has "Windows Netork" folder, but its empty. What am I missing?
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Apr 5, 2011
I got two computers with the exact same symptoms today: Both seem to be alive. They answer pings and they host virtual machines which are working. However, I cannot login via SSH. I get
$ ssh -v obelix
OpenSSH_5.3p1 Debian-3ubuntu6, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /home/mike/.ssh/config
debug1: Applying options for obelix
[code]....
On the console I can switch the ttys and enter my login credentials. After that I see the GNU/Debian Linux welcome message an no prompt. The system seems to hang. I'm able to switch the tty again and login with the same result. (I tried that three times now and I start running out of ttys.) A search on the Internet suggested some ressoucre shortage. How could I release some resoucres than? How could I further investigate the situation before just trying a hard power off?
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Jun 18, 2011
I need help to figure out mounting. I have 3 computers running Natty. 1 a desktop 64bit dual boot with Win7 (64) Home Prem; a dell inspiron mini (32bit) dual boot with Win7 Home Prem, and an old 486 Intel based PC running ONLY Ubuntu. My Samba shares are on an external HD currently residing on the 64 bit. I installed Mount Manager...still trying to figure out how it works exactly. I'd like to auto-mount the shares "routinely accessed" (shared network drive, network personal for each machine) allowing as needed access. Then the other personal network drives I would like to mount only when needed. Leaving local home drives password/share protected ... using the network personal folders as a place to add files or such that need to go to a local drive.
{basically I have 3 computers which each have a local home folder, and a network home folder; then I have a network shared share where open shares will be stored (email, calendar, most documents, theetc) each computer has a primary ubuntu user (user id 1000). I have 3 windows ids on 2 computers. each of these ids has been paired with an ubuntu user in smbusers; after this weekend I will only have 1 windows share and 1 user hopefully! so the other two ubuntu users will have non-existent windows IDs}Right now I can (from a non-server machine) access the shared network drive, but cannot access any others. (Makes sense...that share is totally open). On the remote drive I have samba the the installed but no samba directory and it hasn't been configured (obviously).On the standalone (where the HD is attached) I can access any of them by mounting them where they are listed under Places, but through the network menu I can access the shared drive, and the personal drive with just one password entry (my login or sudo password). The others whenever I enter my login/sudo password I get an unable to mount error.
I currently have 3 Ubuntu users & 3 windows users. I've assigned each Ubuntu user an window user name hoping that would make the authorizations easier. I'm currently using a generic Samba password and a generic Ubuntu login password but they are different. So one password for each, each user has the same passwords. I do allow guests using the guest group (not nobody, but I could change that easily enough)If I weren't so stubborn I'd just ditch the passwords, make all shares open to everybody, but eventually I hope to be able to do remote access (via mobile) and would rather just do it all from the beginning than mess with it later.I've been hesitant to mess with programming in the mount/unmount process because I'm not sure I understand it that well (which is why I installed Mount Manager). Problem is I don't understand it well enough to figure out how to use Mount Manager. I did see where automount will not work if you have to authenticate the share before mounting. One of the reasons I only want to automount the 2 shares for each machine. That particular process sounded like what i want for those 2 connections on each. But first I need to figure out mounting period I guess.I may be really confused, or trying to do something that I with my limited knowledge and needs really don't want or need to do....wouldn't be surprising! I'm known to make things more complicated than needed. If a simpler approach seems more logical feel free to share!
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Jun 22, 2010
I'm having a strange problem on some of our Debian servers. It all started about three weeks ago when we moved our virtual environment (VMWare ESX3) from a SAN to a NAS (NetApp). At first I thought it had to do with that move but since the other 9 servers are working perfectly I eliminated that idea. For over a year all 12 Debian 5 servers have been working great without mentionable failures. All servers are (where) up to date with the latest patches. About three weeks ago I started having kernel panics with the following message on three of our servers:
Code:
Code: Bad EIP value
EIP [00000000] 0x0 SS:ESP 0068:f6d7da18
Kernel panic - not syncing: Fatal exception in interrupt and other times it looks like just a dump of hexadecimal data. The only difference between those 3 servers is that they have several mounted shares connecting to the NAS using CIFS. So I was thinking that it might have to do with an update of some kind in regards to smb. I recovered an image from a month ago, before the troubles began, copied over the data and MySQL databases and configured the 'old environment with recent data' exactly the same with MySQL master-master replication, document synchronization and load balancing. This task I performed last night (no other way since it's a production environment). Up to this time neither of the two 'restored' servers had a kernel panic. The one that has not been restored is having one at random about every hour and a half. Following are the different versions between the 'at this time' working server(s) and the failing one:
Code:
FAILINGWORKING
samba-common 2:3.2.5-4lenny122:3.2.5-4lenny9
smbclient2:3.2.5-4lenny122:3.2.5-4lenny9
smbfs 2:3.2.5-4lenny122:3.2.5-4lenny9
[Code]...
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Jul 24, 2011
Attempting solutions to Broadcom 43xx issues [URL]... I keep running into error messages with dpkg when I attempt to install suggested files: "read error in '/var/lib/dpkg/triggers//File':input/output error"
Main problem is "wireless network device not ready (firmware missing)"Laptop is Dell D610
Running Natty Narwhal 11.04 My expertise with Ubuntu is minimal.
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Jan 29, 2011
I have a Broadcom Corporation NetXtreme BCM5721 network card on my server at work.Everything works fine for a few weeks, then randomly the network connection on the server will stop working. After it stops working, I will try to reconnect with the network manager, it shows a wired connection available, it shows the "connection in progress"animation, then the "connection disabled" icon.
I uninstalled the network manager and used manual configuration, but do you think the network manager was the issue? I can't have the server disconnecting randomly every few weeks with no way to know what the real problem is. Was there an issue with the network manager with 10.04?
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Jun 25, 2010
Due to the enormous quantity of flash plugin related problems, I decided to expand my tutorials and create this thread to provide support for flash issues (is getting really hard to follow all the flash related threads and provide a decent support)
Current available tutorials:
Flash Optimization
Flash Issues & Solutions
Firefox extensions:
When asking for support, please describe your problem in detail and provide the output of the following commands and instructions. This will make sure I will have a good understanding of your Firefox and Flash installations, so I don't need to guess what might be happening to your system:
1 - Flash Version
Type about:config in Firefox address bar, then type plugin.expose_full_path in the filter, then double-click the same item in the results to make it true. Then type about:plugins in the address bar, find Shockwave Flash, copy the corresponding Path and Version and paste here. it should look lie the image below:
2 - Firefox version and architecture
To find Firefox version and architecture, click "Help >> About Mozilla Firefox" in the menu. The info will be located at the bottom of the info dialog:
3 - System Info
Execute the following commands then copy the generated file, named firefox-report.txt from your Desktop and upload it here or paste the contents.
To execute those commands, select the entire content below, then go to "Applications >> Accessories >> Terminal" and click the terminal with the middle-mouse button.
Code:
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Jul 19, 2010
I am trying to configure Apache on my server to work with ssl, but everytime I visit my site, I get the following message in my browser: SSL connection error. Unable to make a secure connection to the server. This may be a problem with the server, or it may be requiring a client authentication certificate that you don't have.
Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error. Just some background on the situation: I am using Ubuntu 10.04 desktop edition. I installed apache by installing zend server (it installed apache automatically). I then installed openssl. Non-https pages work fine on the site. I tried getting trial certificates from multiple certificate sites but nothing is working (same error). I was previously hosting my site on another server on which ssl worked just fine. I also tried using the key and crt file from that server, but I got the same error. The domain name and IP are still the same though. My SSLCertificateFile and SSLCertificateKeyFile are pointing to the correct directory and files.
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Apr 16, 2011
Ever since installing ubuntu maverick meerkat, ive been having an issue with the sound control, whenever i turn the sound down below 24%, it cuts out completely, and it goes from relatively loud, to silent. Has anyone else had this problem? where should i start troubleshooting?
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Jan 29, 2010
Okay so my school has a Z: drive which is the network drive that holds all of the students folders. I need to connect to it so that I can complete projects and place them in my server drive. How would I go about doing that?
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Feb 2, 2010
I have an ubuntu 8.04 dedicated server running openssh which I am having problems with.
The server is based in England yet I am currently working from Thailand. Slow speeds and timeouts I am used to but it is now over 24hr since I have managed to SSH the server (from here).
I just tried remote desktop on my PC back in the UK and this connected straight away through both SSH and SCP.
Thinking that it may be the IP being blocked from my works network I switched off wifi on my phone and tried to connect over the data network a few times with no luck.
Another strange problem is that when we got the server it was locked into a chroot jail which SSH(22) always leads into. After accessing SSH on port 22 I have to run a break script to gain root access. The sshd_config file says that the server is listening on port 57 yet I have never been able to access this.
Code:
> netstat -a | grep ssh
tcp6 0 0 [::]:ssh [::]:* LISTEN
> iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
[Code].....
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Mar 1, 2010
I have Ubuntu Server 9.10 up and running as my file server. However, it sits amongst other PCs running XP Pro and Network Printers (e.g. Xerox Docuprint C2535A) on the network. My question is whether there is a way of adding the Xerox printer to the Ubuntu Server so that other PCs will send print jobs through the server. I think the printer is windows-based printer. Is it possible to do this? or are there any other options that you may be able to share with me?
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Nov 3, 2010
I just setup a ubuntu 10.10 box learn linux and to play around with, and want it to host my website. I can see the web site on my local network no problem but the outside world gets a time out message. I check to make sure everything is forwarded correctly on my router and the dns so i has to be something in ubuntu blocking out-of-network traffic how do i turn port 80 on to the outside world
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Jun 27, 2011
I have Ubuntu 10.4 Server, it's a local intranet server in back of a router in a "standard" home network. As I understand it laptops, PCs and the server are "hidden" from direct contact with the internet by Network Address Translation [NAT]. The router is a Linksys WRT54G all clients are connected to it, and the router itself is connected to a modem provided by the ISP. The server was given a static IP address. To admin the server I connect from a local client with SSH and get a command-line.
Is there a way to admin the server if I am a thousand miles away from this local network? Putting it another way, Is there a way to "tunnel" through to the server, give the user/pw and get a command-line from the internet? What software or hardware is needed?
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Aug 8, 2010
I need to know what commands we have people run in the terminal in order to help them troubleshoot their issue. The reason being, is I was reading a thread where someone was stating about how they had to do all this and all that from a terminal and what not and that there should be a GUI Tool.
Well I'm going to make a GUI tool that allows them to obtain all the necessary information (and fixes are possible too) to help with their issue that they're currently having. For example: I know we run lsmod for sound issues, but what other commands do you have them run to check sound, video, network, etc. It will be made in wxPython so that it can be easily sent to others. If it becomes quite useful, then maybe we could get it in the repos.
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Jun 10, 2010
I just installed Ubuntu server edition on to an old Dell desktop. The only problem is that I can't get the Internet to work. I have tried the following and I guess it doesn't work:
Code:
sudo ifconfig eth0 192.168.1.52/24 up
sudo route add default gw 192.168.1.1
Each of those commands don't give me any error and it would seem like everything works fine, until I try to ping google or any website and I get an error that tells me that no host was found. I am using version 10.04 of Ubuntu server.
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Jun 30, 2010
I've got three network devices on a laptop:
1. Built-in ethernet LAN
2. Built-in ethernet WLAN
3. PCMCIA ethernet LAN
I installed Ubuntu Server on this computer without the last one inserted.I inserted the last one today, and it lights up when i put in the cable. To be sure if Ubuntu has found it, I tested with the install CD and could see that it found all three at the first part of the installation where I have to chose a primary device.I can't get my WLAN card working, neither do I get my PCMCIA LAN card working. The third card, this PCMCIA card, has worked on Ubuntu Desktop using another laptop. And as said, the setup finds all three.
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Jan 13, 2011
how to configure an Ubuntu 10.10 server with a secured wireless network? I installed everything while it was wired, but I need to get it wireless. I downloaded the desktop to see if it could help me in configuring the wireless network, but it didn't help. how to configure wireless internet on an Ubuntu 10.10 Server in the terminal, which is preferred, or in the desktop.
When I type the command iwconfig, it shows eth1 being me wireless device. When I try and edit it, nothing changes! I don't know what I need to change other than the ESSID and the WEP key. I'm assuming I need to change the access point too, but it doesn't let me. Is there any specific order they must be changed in?
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May 8, 2011
Network server to administer accounts for all users, one login ie at login select or type in user name and password to login - so that I don't have to setup users separately on all PC's so that they can login from any computer.
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Feb 25, 2011
I have a bunch of Ubuntu boxes on one subnet, 192.168.1.0. I have a Windows 7 box on another subnet, 192.168.2.0. I am able to ping and SSH to all servers on the .1 subnet except for one server, which I will call PITA. I will attempt to SSH to PITA, and it won't respond, nor does it respond to pings. I will the SSH to PITA from another of the test servers, successfully connect, and then when I SSH from my Windows 7 machine I can connect successfully. If I first connect via console to PITA and send some pings out (to anywhere, like 4.2.2.2), I can also connect from my Windows 7 machine. I've never seen anything like this.
One of the weird things is that I used PITA to create an image that I then used to create many of the other test servers, and they work fine, so I'm not sure what the problem is. I've checked /var/log/messages and syslog and there's nothing in them that indicates a problem. I've rebooted this server, restarted SSH, changed the IP in case it was conflicting with something else, forced an ARP update in case it was cached (since I had bonded the interfaces), cleared the ARP cache on my own machine, verified Network Manager is not installed...and I still have this issue.
Here are some network-related config:
/etc/network/interfaces
Quote:
# 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
[code]....
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Mar 21, 2010
I have an internet connection with 512kbs speed. I have PCLinuxOS installed on my laptop. when I boot the machine through PCLinxOS, I am not able to connect to the internet.
I am not getting IP/DNS entries/Gateway by my ISP. Can anyone please help me in troubleshooting this ?
But when the same Internet connection is connected to another Windows XP machine. Its working fine.
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May 6, 2011
I need a portable emacs to use for troubleshooting GNU/linux machines. A USB stick is the preferred medium as some of the computers I will work with may not have an optical drive.
Will I need separate versions for 32- and 64-bit systems?
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Mar 18, 2011
I've been troubleshooting the Audio for my iMac for the past few weeks (ugh) and right now I'm working through this: [URL}...When I use
configure --with-cards=hda-intel It tells me:
Code:
The file /lib/modules/2.6.35-28-generic/build/include/linux/autoconf.h does not exist. install the package with full kernel sources for your distrubution or use --with-kernel=dir option to specifiy another directory with kernel sources (default is /lib/modules/2.6.35-28-generic/build). When I searched for how to get kernel source I got this:
[Code]...
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Aug 19, 2010
I know openSUSE (and SUSE Enterprise) work great with windows Active Directory.Now, I understand that Linux systems are far more stable and secure (if configured properly). What about features though? What does openSUSE/Linux have instead of AD for file/folder sharing across the network? Are there roaming profiles? If so, how do I use that?I love openSUSE because of yast (and a few other things). And It's my main LinuxOS on my tower. I am still in college getting my certs and a degree (in networking). I really want to understand why Linux (openSUSE/ SUSE enterprise) is a better networking solution as opposed to Windows Sever 2003/2008.Also, why SUSE over RHEL/CentOS? Yast is awesome, but are there other reasons?
I know that's a lot to ask in one post. Feel free to include links so you won't have to type too much.I'd like both personal opinions, hard facts, and just general user experiences as to the features that make Linux (openSUSE) better, not just the stability and security.
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May 19, 2010
My DNS server is baring 192 series IP for ex: 192.168.10.100, need to configureloadbalancer IP in that DNS server, where loadbalancer is baring 172 series IP. for ex : 172.56.67.19.is it possible to cofigure the loadbalancer ip in DNS server? if it is, please let me know the configuration details and procedure.
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