Ubuntu Networking :: Use Of NFS Freezes Client Under Various Circumstances?
Oct 14, 2010
I'm using a Kubuntu 10.10 Client Machine which mounts NFS shares form a Kubuntu 10.04 Server.The server seems to work smoothly but the client causes huge problems since I upgraded to 10.10 (before I used 8.04 which worked withouth problems).My problems are, that in various situations the use of the NFS shares causes the Client to freeze completely!Examples:Unzipping a big file from the NFS server to the NFS server via the client -> always immediate freeze (after some seconds)Transfering big files from one NFS folder to another -> mostly immediate freeze (after some seconds)Viewing a movie which is on the NFS server -> sometimes freeze after variably amounts of timeLetting the Strigi-Indexer index files on the NFS shares -> mostly freeze after a short whileIt seems that everything that puts some load (high data transfer) on NFS immediatly locks up the whole client.
View 5 Replies
ADVERTISEMENT
Jan 22, 2010
Cisco vpn client would freeze the system. The only way to recover is to do a hard reset. The funny thing is I had it working before, so it may be random. However, it just happened 3 times in a row and I haven't tried again. I'll try again tonight. I'm pretty sure I'm running the latest client for 64bit linux systems. I'll confirm that when I get a chance, as well as my kernel.
View 7 Replies
View Related
Mar 29, 2011
I'm administrator for a bunch of servers, all RHEL5.5, with our specific software. Since this is a cooperation with one of the largest hardware vendors in the world they also have root access which for 'political' reasons I cannot change or keep from them. Now, I installed rootsh on a test server and it works fine when called the normal way (sudo rootsh). However I want to invoke the rootsh also when the regular user uses:
Code:
sudo su
sudo su -
su -
su
I 'moved' su to another location and created a symbolic link named su to rootsh which works fine when executing:
Code:
sudo su --
but fails on all other calls mentioned above. How I can proceed?
View 9 Replies
View Related
Jun 16, 2009
I have a 11.1 NFS server and several 11.1 NFS clients. If for some reason the server shuts down before the clients then the clients become almost frozen, particularly KDE is rendered useless even after cycling back to init 3 then init 5. I would like to make the clients immune to shutdowns on the server.
View 3 Replies
View Related
Feb 25, 2010
On the ReadyNAS Duo, a RAID resync synchronizes the entire contents of one disk to another. It's a slow operation. So it's not something to be done lightly. By default, it is done whenever the unit is shut down uncleanly (generally the result of a hang or power interruption). It's something that can be disabled, though, such that a resync would be done only when manually requested. The authors of the software RAID driver in Linux (called "md") came up with a nice solution to the problem of slow RAID resyncs: the md driver allows you to assign a write intent bitmap to an md device, and where it's stored is configurable (the default is to store it on the md device in question, in the superblock). So when the array goes down unexpectedly (e.g., in a power outage), only the blocks that the md device was going to write will actually be resynced.
It's sort of like a journal for the md device itself. Now, the ReadyNAS Duo doesn't seem to use Linux md at all for implementing the RAID volume, but it does have an option to disable automatic resync in the event of an improper shutdown. And that leads to my question: how necessary is it to do a resync in such an event? If the Duo uses the same method as the Linux md driver, then obviously such a resync would rarely be necessary. But if it doesn't, then it would be the equivalent of using the md driver without a write-intent bitmap, and a resync would almost certainly be necessary in the event of an improper shutdown. Does the Duo (and maybe other units) use the equivalent of a write intent bitmap for RAID write operations?
View 1 Replies
View Related
Dec 31, 2010
I've been using Windows Home Server as a Backup Appliance, Media Server and Share Server at home for some time. I decided it was costing me allot of juice so very early on added the "Lights Out" add-on to ensure it was only running as and when needed.
I'm now looking to switch to a Linux based server and I'm looking for a similar tool/set of tools for advanced power management.
Now the question;
Anyone got any all-in-one suggestions (i.e with client parts for both Windows and Linux and a server part for the Linux server), or can anyone simply verify that I'll need to set-up all the individual bits for this myself separately?
View 4 Replies
View Related
Jan 6, 2011
trying to create a "local network" by directly connecting an IBM Thinkpad with Debian Linux installed on it to an Alix computer running Voyager Linux. I'm following a "how to" I found to create a music server, hence the requirement. My issue is I can't get a static IP address to be configured on the Debian machine.I've trawled the net and have found the instructions about editing the /etc/network/interfaces and have tried to do this. First I tried to get DHCP working so I could connect the Debian machine to the net and this proved successful. I edited the interfaces file to look as follows:
# The loopback network interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
Then I tried adding a static IP address to the machine. As this is a network purely between two machines I made up the IP addres and used 192.168.0.1 and used a NetMask calculator to give me a NetMask of 255.255.255.254 (I told the calculator there would be 2 machines on the network). I then edited the interfaces file as follows:
# The loopback network interface
auto lo
iface lo inet loopback
[code]....
I re-booted the machine (ifdown eth0 followed by ifup eth0 keeps saying that eth0 hasn't been configured - a problem there that I don't understand), but during boot up time it failed to assign the Static IP address to eth0 and made me go into SU mode. To fix it I simply replaced the interface file with the static IP inputs with the file that had the DHCP entries (I'd made a copy of the DHCP file), and re-started the machine. Everthing came up fine. So the first question is how do I get a static IP address to be assigned to eth0 such that whenever I shut down and restart the machine the static IP address is always loaded?
The second question is around creating the network via the cross over cable. From what I've found via Google, all I should have to do is create a static IP address on the Debian machine and a static IP address on the Voyager machine. Once they're connected by the cross over cable they should see each other. Is that correct, or do I have to do anything else?
View 2 Replies
View Related
May 20, 2009
I have the following problem:I have to networks in remote places.I have an opnvpn client in one network that connects to the the router (openvpn server).My question is,can i connect the network where the openvpn client is,throught the computer with the client to the other network.If yes,how? (please make it an idiot proof anwser because i have limited knowledge about iptables). I was thinking like forwarding (the router in the network with the openvpn client is also firewalling with iptables) the request of the ip class of the openvpn network to the computer with the client,which masquarades the interface
View 2 Replies
View Related
Oct 16, 2009
Will Redhat support CentOS under any circumstances? I have heard at my employer that if you setup you system with CentOS and then on down the line you find you need RHEL support that you can purchase a license from Redhat and they will support your CentOS installation.Is that an official policy at Redhat? Unofficial? Or completely untrue?
View 2 Replies
View Related
Dec 7, 2009
Consider the following code:
Code:
int main()
{
int i=0;
pid_t pid;
for(i=0;i<2;i++)
[code]....
I get the following output:
Parent: chid_pid=4356 i=0 parent's pid=4355
This is child 4356 i=0
This is child 4357 i=1
[code]....
I can observe instead of two children(as I expect) processes there are three. This is because child process 4356 creates its own child. Why all the messages of the type "This is child X i=Y" are concentrated one under another? How exactly fork works? Is affected by the fact that I have a dual-core processor?
View 3 Replies
View Related
May 26, 2011
I have configured server ubuntu 11.04. Everything works fine, but there is a need for some clients to connect local hard drive. What should I do? How and what modules are added to the ltsp-image? How to register in the fstab on the client? Maybe I'm going the wrong way?
View 1 Replies
View Related
Nov 28, 2010
Unlike a lot of others, I have had no problems getting the wireless on my Dell Studio 1558 working with the STA driver. As long, as I am not on battery, that is. Within minutes of switching to battery and disconnecting from the LAN, my system freezes: I cannot move the mouse, the keyboard is useless (I can't even Ctrl-Alt to a terminal) and my only option is a hard boot.I currently have the 2.6.35-23 kernel and I have tried the following driver options for the wireless (all the below were tried with 2.6.35-22):
- the Broadcom STA driver in the repos- the latest STA dirver from Broadcom- the new broadcom driver, not yet available in ubuntu repos (brcm80211)- ndiswrapper ( I can only get win 7 drivers for my laptop, so this does not even enable the driver)My Wifi card uses the BCM43224 chipset.After a freeze, I have pored over the logs and I cannot find any obvious error messages preceding the event - so I am a little at wit's end ito resolving this. Can anybody give me any clues as to where I should start looking to resolve this issue?
View 9 Replies
View Related
May 16, 2011
I just installed Ubuntu 11.04 on my asus eee pc 1001px. Problem when I switch to wireless. Netbook freezes and all I can do is shutdown it by hand. Netbook have Atheros wireless adapter.
View 1 Replies
View Related
Oct 22, 2010
Is there a vpn client out there that:
1) doesn't require a group password
2) doesn't require a cert
3) can work with cisco any connect
the vpn server admin is being pretty obstinate and uncommunicative
is there such a program?
View 4 Replies
View Related
Nov 23, 2010
I connect to my corporate LAN(dhcp) using a wired connection and also connect to a WLAN(dhcp) without various constraints applied by the wired connection. In short my wired connection blocks outbound ssh traffic to my server at home. My WLAN connection is pretty lax so ssh connections to my home webserver can be made using the wireless connection.Can I route ssh to that particular ip via my wireless connection?
View 1 Replies
View Related
Jun 27, 2011
We are having a cluster with couple of disk servers, compute nodes and a head node. Disk server is nfs mounted on all the compute and head nodes.
The problem is that if any of the disk servers hangs, it freezes rest of the cluster too which is dangerous. Ideally, cluster should not care about the hanged server and run without any problem except files from that server is not visible.
Is there any way I could avoid the problem of freezing cluster because of one hanged server?
View 1 Replies
View Related
May 10, 2010
I have 2 computers with Ubuntu 10.04, when I VNC to the computer I want to control I get the first frame but no subsequent frames. However I can still control the computers mouse and action on anything I want to but I need to be in the same room to see the screen I am VNC'ing to, this sort of defeats the point of VNC as I would like to be able to control the computer from any room in the house.
View 1 Replies
View Related
Aug 11, 2010
I installed network-manager-vpnc, configured cisco vpn through NetworkManager. It works slow, but the bigger problem is that after minute or so the connection just freezes.Then I tried kvpnc. It works like it should from speed point of view. But it also hangs up after minute or two.Tried to change MTU of my wired connection to 1500 - no good.Tried to uncomment line in /etc/ppp/options "mru 542" - no good.
Created /var/run/vpnc because it was giving some error "can't open pidfile /var/run/vpnc/pid for writing".From logs everything seems fine except for "nm-dispatcher.action:Script '/etc/NetworkManager/dispatcher.d/01ifupdown' exited with error status 1." in last line. If I use kvpnc it gives no errors.SO, how do I debug this thing or does anyone knows something I don't in this case?
View 5 Replies
View Related
Oct 16, 2010
I am connecting from my WinXP laptop to my Ubuntu Server desktop using PUTTY. The laptop is using Wifi and the desktop is on a wire. I have a D-Link DI-524 wireless router. My session works fine for a while, and then freezes, sometimes after only a few seconds, and sometimes after many minutes. The same thing happens when I use VMWare Server Console to connect from the laptop to the desktop's virtual machines. Other connections between these machines under this setup (RDP, samba, SVN) do not experience problems. I usually do not experience problems establishing the SSH and VMWare connections.I have ended up using Windows Remote Desktop to connect to a Windows XP virtual machine on the desktop, and opening a PUTTY session on that machine. That's a nice workaround, but it makes it so that I have to have that VM running in order to have a reliable SSH session to the box
View 5 Replies
View Related
Feb 21, 2011
I'm new on Linux and I have a problem with my wireless connection. Ubuntu is always freezing when I try to connect my wificard to my box.
Here are, different tests?
Code:
franck@franck-EASYNOTE-PB11400002:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=10.10
DISTRIB_CODENAME=maverick
DISTRIB_DESCRIPTION="Ubuntu 10.10"
Code:
franck@franck-EASYNOTE-PB11400002:~$ lsusb
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub .....
View 9 Replies
View Related
Apr 15, 2011
i am getting some troubles with WiFi. I got a Lenovo G550 with a BCM4312, at first i found some troubles making it work but i managed to find a proper driver and it is working "fine" Every 5 minutes or so my WiFi freezes and internet stops working. I don't get disconnected from the network, but until i don't reconnect to it, internet will not work.
Rare thing is, i realised that this happens ONLY when my notebook is plugged in. When it's working on battery, this does not happen. If i use it on battery it works for 30-40 mins (or more) and 3 minutes after i plug it in, it just stops working. I'm using Ubuntu 10.10, if there is any information i could give, just tell me. I also have a Windows partition and this does not happen there, either plugged in or on battery.
View 3 Replies
View Related
Apr 11, 2010
I am using a core ftp client on windows. Is there any similar software available on Ubuntu so that I can completely switch to Ubuntu.
View 1 Replies
View Related
May 21, 2010
I have been used NX client on windows 7 connected to ubuntu with NX client/node/server with no issues. The matter started when I have formatted Ubuntu and reinstalled NX, from that NX connects but shows a key error as follows:
NX> 203 NXSSH running with pid: 4328
NX> 285 Enabling check on switch command
NX> 285 Enabling skip of SSH config files
[code]....
View 7 Replies
View Related
May 26, 2010
I would like to be able to mount a share served by my mac os X machine(10.6.1). I have read the Ubuntu community doc on Ubuntu samba clients.It didn't say what to do when using dynamic LAN I.Ps.I understand the way to go is to use avahi on the client side(Ubuntu) and Bonjour on the server side(mac os 10.6.1).I can't find anything about how this is done.What do i need to do to set up the client side(Ubuntu) to use avahi with SAMBA?.Because in the Ubuntu community doc it just referenced /etc/hosts, which is for static I.Ps.So i'm assuming that SAMBA on Ubuntu doesn't use avahi by default.All i need to know is how to set up the client side of SAMBA on Ubuntu when i'm using dynamic LAN I.Ps.
View 5 Replies
View Related
Sep 10, 2010
Ok so i have a server in which i have setup dyndns setup so that i can use an address such as example.com to connect to my server. The server has openssh installed and it is configured properly.
What I can do:
Code:
Connect to server (locally) from linux terminal
Connect to server (locally) from windows putty client
Connect to server (Over Internet) from windows putty client
What I can't do
[Code]...
View 3 Replies
View Related
Oct 1, 2010
I am trying to connect to an existing VPN server that I have been using for years now. I am moving my develpment environment over to a Ubuntu box and I must have openvpn working in order to access SVN. It has been a few years since I have been setting up linux boxes. And networking is a soft spot for me. But
The server has been running without problem for a LONG time. A windows computer I have been using connects to it fine and I can access the network on this machine. I am setting up a new computer, but when trying to connect openvpn starts the initialization sequence completes but I cannot ping the network I am trying to connect to.
I use a second VPN connection to connect to an alternative network and it works fine. The difference between these two is that the working vpn connection is a routed IP tunnel and the one that is not working is a bridged connection.
The VPN that is working on this box brings up tun0 while the bridged connection connects but does not bring up a network tun device. The server logs look normal, it just looks like the client is not setting itself up to use the network once connected. (The key/cert pair work find when on a windows box) Just not on this new ubuntu build.
My current client config
Quote:
cert eric@home.crt
key eric@home.key
client
dev tap
[Code]....
The server is using tap, as well as the working windows client uses "dev tap"
It has been a long time since I have been maintaining linux boxes but its coming back slowly.
Do I have to bring a device up manually ?
View 6 Replies
View Related
Nov 14, 2010
I have a wireless router situated in another room. I am able to access this router (and consequently the internet) through a Windows laptop that has a wireless card in it. However, my other laptop that has Ubuntu 10.10 installed on it, doesn't seem to have a wireless card in it, and I have confirmed this by running the commands
Code:
lspci
and
Code:
iwlist scan
I briefly was able to share a folder in my Windows machine, and access it through my Ubuntu machine, after connecting both laptops with a cross-over cable. However, I can't even ping the Windows machine from my Ubuntu machine anymore, after trying to configure the IP addresses. I think I screwed it up.
Also, although this is not an Ubuntu issue, I have a weird Windows problem, where I can't access the Internet when both wireless and wired ethernet controllers are active at the same time. It would be a bonus if you could solve this problem too for me. I was surfing online for a solution to this problem for quite some time, but I was unable to comprehensively understand and implement what I browsed through. Also, some of the guides, like for example, that on configuring Samba, seem to be outdated, as the terminal tells me something like the package (that was required to be installed by the guides through sudo apt-get install) has been superceded. Hence I post here for clear, concise and easy-to-understand help from you gurus. It would be great if I could achieve the end result of being able to access the internet on my Ubuntu machine (through the Windows one).
View 9 Replies
View Related
Dec 13, 2010
I have a number of Ubuntu machines running. Our NAS is FreeNAS. I am typing this on an Ubuntu 10.04 desktop that is successfully connects to an NFS share on the FreeNAS box every day. In addition, we have 3 10.04 server machines that also stay connected to the share successfully, Yesterday, I installed a new 10.04 server machine using IP 192.168.0.11. Everything works except connecting to the NFS share. It always returns with: mount.nfs: mount to NFS server '192.168.0.13:/mnt/amrd0s2/public-NFS' failed: timed out, giving up
Here's what I have checked: I can ping 192.168.0.13 (obviously) The NFS export mask is set to 192.168.0.0/16. The other machines are all on the same subnet as this problem machine (192.168.0.*) nfs-common, nfs-client, and portmap are all installed and running correctly. portmap is running correctly showmount -e 192.168.0.13 give the proper response:
Export list for 192.168.0.13: /mnt/amrd0s2/public-NFS/ 192.168.0.0 iptables isn't even installed (these machines are segregated in a private network behind a hardware fire all) There is nothing related to NFS is any of the syslogs. dmesg has one entry: [6.025966] FS-Cache: Netfs 'nfs' registered for caching which is insignificant. how to at least debug the nfs-client short of downloading the source and actually stepping through the code.
View 1 Replies
View Related
May 7, 2011
I'm trying to install the Cisco VPN client on Ubuntu 11.04, kernel version 2.6.38-8 generic-pae. I need a step by step process since I am an absolute beginner with Ubuntu and this is my first install on the operating system. I have already tried the network manager but connection always fails. I have also tried the website [URL] but this always fails, seems this was made for earlier versions of Ubuntu and earlier kernel versions.
View 9 Replies
View Related
Jun 29, 2011
I am trying to connect my pptp client Linux to a pptp Linux server using modem but no success. I can only tweak ppp linux side Observing the following log I found it�s due to MPPE Support configuration mismatch in pppd, pppd (linux client) is refusing to accept MPPE encryption.
pppd[24545]: pppd 2.4.5 started by root, uid 0
chat[24547]: abort on (NO CARRIER)
chat[24547]: abort on (NO DIALTONE)
chat[24547]: abort on (ERROR)
chat[24547]: abort on (NO ANSWER)
chat[24547]: abort on (BUSY)
[Code]....
View 1 Replies
View Related
