Search Results

Search found 5092 results on 204 pages for 'kernel tracker'.

Page 169/204 | < Previous Page | 165 166 167 168 169 170 171 172 173 174 175 176  | Next Page >

• Ubuntu NBR karmic boot freezes at fsck from util-linux-ng 2.16

  - by BlueBill

  Hi all, I have a netbook (emachine e250 - equivalent to an acer aspire one) and I have Ubunutu NBR 9.10 installed on it. Every other cold boot freezes at the following error message: "fsck from util-linux-ng 2.16" There is no disk activity, no activity what so ever. I have left the machine sit for over an hour and nothing. It takes a couple of hard resets to be able to boot properly. Once it boots everything works great (wireless, suspend/resume, etc.)! I have spent the last couple of weeks researching the problem and the only thing that seems to work is setting nolapic in the boot string in grub - it boots every time. Unfortunately, nolapic disables the second core and causes problems with suspend resume. At first I thought it was an fsck problem with the first partition on the hard disk as it is a hidden ntfs partition containing the windows xp recover information. So in /etc/fstab I set the partition so that it would be ignored by fsck. This didn't seem to do anything. I have these partitions: /dev/sda1 - an ntfs recovery partition /dev/sda2 - /boot /dev/sda3 - swap /dev/sda5 - / /dev/sda6 - /home I am running kernel version 2.6.31-19-generic and have all the patches (as indicated by update manager). I also have no splash screen so I can see the boot progress. I have only been using NBR since January, I have been using Ubuntu on my desktop since last June (2009-06). What logs should I be looking at? Is there a log for failed boots? Thanks, Troy

  Read the article

• How can I make my PCI-E graphics card visible to Ubuntu when the motherboard has integrated graphics

  - by Norman Ramsey

  I have a Gigabyte GA-MA74GM-S2 motherboard with integrated graphics that shows up on lspci as an ATI Radeon 2100. I also bought a PCI-Express Nvidia graphics card so I could use the VDPAU feature on Linux (plays H.264 in hardware). The BIOS has three settings about which display to initialize first: Integrated graphics PCI graphics PCI-Express graphics (PEG) I set the BIOS on PEG, but I cannot get anything, not even a splash screen or POST messages, to emerge from the PCI-Express graphics card. (I'm using a DVI connector; the card also has an HDMI output.) I cannot get the kernel lspci to see the graphics card; the only VGA controller it acknowledges is the integrated one. Running dmidecode acknowledges the existence of an x16 PCI Express slot, and it says Current usage: Unknown There is an additional BIOS setting called "Internal Graphics Mode" which is normally set to "Auto" which means it is supposed to prefer a PCI Express VGA card. I set it to "Disabled" which now means I'm getting no output at all. I will soon be learning how to do a BIOS reset! Other information: The PCI-E card is a MSI N210-MD512H GeForce 210. This is a fanless card. Although there are no fans to see turning, the heat sink on the PCI-E card is definitely getting hot, so the card is getting some sort of power. It gets all its power from the PCI-E slot; there is no external power connector. The BIOS is an AMI Award BIOS. My question: how can I make the PCI Express graphics card visible to Ubuntu?

  Read the article

• Boot ISO image from GRUB4DOS on EFI machines

  - by Vladimir Tikhomirov

  I failed with loading ISO image (non-distro) from GRUB2 from USB stick, but found the way how I can boot the GRUB4DOS and then load the image from there. However, it doesn't work all the time and the questions is WHY it doesn't? Environment and loading process: We need to have EFI machine, USB stick, booting ISO, GRUB2 and GRUB4DOS. Last 3 on USB stick. Boot: USB - EFI loader - GRUB2 - GRUB4DOS - ISO image Configuration files To boot GRUB4DOS I use this from grub.cfg: menuentry "image.iso" { linux /syslinux/grub.exe --config-file="/menu.lst" } My menu.lst is here: timeout 20 default 0 title image.iso find --set-root --ignore-floppies --ignore-cd //image.iso map --heads=0 --sectors-per-track=0 //image.iso (hd32) map --hook chainloader (hd32) This works perfectly with Legacy machines. However, when I come to GRUB4DOS, I don't see the menu with image.iso, I see only GRUB command line. That means that my menu.lst didn't load. Why is it like this? Background and ideas I have an idea that GRUB4DOS doesn't recognize my USB stick as a device. I tried the command find and got (hd0,0), (hd0,1), (hd0,2), (rd). When I tried to set root to any of these devices I don't see fat file system, how it was with Legacy machines. The root device is (hd0,0), which has ntfs file system which should be partition with Windows. EFI machines support only GRUB2, so I can't boot GRUB4DOS straight away. Please, don't suggest anything like this, because my image doesn't have kernel. You can imagine that you load HDAT2 or Hiren's boot cd, for example. menuentry "Blancco Blancco5.iso" { set isofile="/image.iso" loopback loop $isofile set root=(loop) linux /isolinux/vmlinuz isofile=$isofile splash quiet initrd /isolinux/initrd }

  Read the article

• Ingress filtering in Linux traffic control: Redirect traffic to IFB device

  - by Dani Camps

  I have an openwrt router and I want to shape incoming traffic in order to classify all the traffic addressed to a certain IP address in my home network as low priority. For that purpose I want to redirect all traffic incoming to the eth1 interface, the one connected to the DSL modem, to an IFB device where I will do the shaping. These are the details of my system: Linux OpenWrt 2.6.32.27 #7 Fri Jul 15 02:43:34 CEST 2011 mips GNU/Linux Here is the script I am using where the last instruction is failing: # Variable definition ETH=eth1 IFB=ifb1 IP_LP="192.168.1.22/32" DL_RATE="900kbps" HP_RATE="890kbps" LP_RATE="10kbps" TC="tc" # Configuring the ifbX interface insmod ifb insmod sch_htb insmod sch_ingress ifconfig $IFB up # Adding the HTB scheduler to the ingress interface $TC qdisc add dev $IFB root handle 1: htb default 11 # Set the maximum bandwidth that each priority class can get, and the maximum borrowing they can do $TC class add dev $IFB parent 1:1 classid 1:10 htb rate $LP_RATE ceil $DL_RATE $TC class add dev $IFB parent 1:1 classid 1:11 htb rate $HP_RATE ceil $DL_RATE # Redirect all ingress traffic arriving at $ETH to $IFB $TC qdisc del dev $ETH ingress 2>/dev/null $TC qdisc add dev $ETH ingress $TC filter add dev $ETH parent ffff: protocol ip prio 1 u32 \ match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB The last instruction fails with: Action 4 device ifb1 ifindex 9 RTNETLINK answers: No such file or directory We have an error talking to the kernel Does anyone know what am I doing wrong ? Best Regards Daniel

  Read the article

• DNAT to 127.0.0.1 with iptables / Destination access control for transparent SOCKS proxy

  - by cdauth

  I have a server running on my local network that acts as a router for the computers in my network. I want to achieve now that outgoing TCP requests to certain IP addresses are tunnelled through an SSH connection, without giving the people from my network the possibility to use that SSH tunnel to connect to arbitrary hosts. The approach I had in mind until now was to have an instance of redsocks listening on localhost and to redirect all outgoing requests to the IP addresses I want to divert to that redsocks instance. I added the following iptables rule: iptables -t nat -A PREROUTING -p tcp -d 1.2.3.4 -j DNAT --to-destination 127.0.0.1:12345 Apparently, the Linux kernel considers packets coming from a non-127.0.0.0/8 address to an 127.0.0.0/8 address as “Martian packets” and drops them. What worked, though, was to have redsocks listen on eth0 instead of lo and then have iptables DNAT the packets to the eth0 address instead (or using a REDIRECT rule). The problem about this is that then every computer on my network can use the redsocks instance to connect to every host on the internet, but I want to limit its usage to a certain set of IP addresses only. Is there any way to make iptables DNAT packets to 127.0.0.1? Otherwise, does anyone have an idea how I could achieve my goal without opening up the tunnel to everyone? Update: I have also tried to change the source of the packets, without any success: iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 1.2.3.4 -j SNAT --to-source 127.0.0.1 iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 127.0.0.1 -j SNAT --to-source 127.0.0.1

  Read the article

• Crash dump analysis

  - by Ryan Ries

  I hope this isn't a stupid question, and if it is, then I want to at least get it over with so I don't feel so dumb in the future. Here we are, loading up a Windows crash dump with Windbg. Here are the first few lines of the debugger output: 0: kd> .dumpdebug ----- 64 bit Kernel Summary Dump Analysis DUMP_HEADER64: MajorVersion 0000000f MinorVersion 00001db1 ... The MinorVersion I mostly understand. It's hexadecimal and it translates to 7601 in decimal. Windows admins would already be able to tell from that that this must be either a Win7 x64 machine or a 2k8 R2 machine with SP1. But isn't 7601 the build number? It's supposed to be Major.Minor.Build/Revision... right? Also I don't understand the MajorVersion. It should be 6. This version of Windows is 6. But isn't 0000000f in hexadecimal 15 in decimal? The full version string of this version of Windows, when you launch the Command Prompt for instance, is 6.1.7601. If 7601 is the MinorVersion, then what is 1 and what is 6? And why does the crash dump say 0F?

  Read the article

• How to run some commands after booting from ArchLinux disk? Or how to change some settings in .iso before booting?

  - by Alexander Ovchinnikov

  How to install Arch Linux with traditional installer with only ssh-access to server? There is nice guide: https://wiki.archlinux.org/index.php/Install_from_SSH I try test this on my home vps: Start VPS with any linux bootable cd and login to remote server (vps) wget http://mirrors.kernel.org/archlinux/iso/latest/archlinux-2010.05-netinstall-x86_64.iso dd if=archlinux-2010.05-netinstall-x86_64.iso of=/dev/sda reboot ... I see, it works but without ssh connection... I need make script, which will send this commands after reboot: aif -p partial-configure-network (and write some information about my server ip etc.) /etc/rc.d/sshd start (need to start sshd) echo "sshd: ALL" /etc/hosts.allow (to allow me login to server, by default deny all) passwd (by default its empty, can't login via ssh with empty password) Can I edit .iso or may be /dev/sda? May be I need write script, which will start after system boot and do this things or may be I can set this settings by default and system will start with correct settings (i think its possible at least in 2. and 3.). Thank you!

  Read the article

• Linux Distro for Beginners

  - by XLR3204S

  Well... I know that's the question arising all over the Internet, but I couldn't find an answer to suit me after googling for quite some time. I'd like to get a Linux distribution, and start learning using the CLI. I'm looking for a distribution already having GNOME installed, as I'll be using Linux-Command.org as my learning resource, and I'm not very familiar with CLI-based web browsers. I'd mainly like to get to know my way around a UNIX-based system, and then I think I'd like to pick up a CLI-only distribution, and start doing more complex stuff. I've tried Ubuntu, Fedora Core, OpenSolaris and FreeBSD (the last two aren't linux distros, I know). Ubuntu and FC are fine, they do come with Firefox, but I'm not really sure they're meant for learning purposes. OpenSolaris was OK as well, but I haven't got to play with it enough. FreeBSD 7.2 did not want to install itself on my 13" MacBook Pro, it generated a kernel panic everytime while copying the files to the disk. So to sum this up, I'm trying to learn Linux, and I'm willing to invest time into this (that is, not giving up when the first problems arise). I also have intermediate knowledge of C++, if it helps, and I'm also using the CLI-vim to write small C++ CLI-based programs, so text editing should be any problem. And... speaking of Macs, how am I going to be limited if I try to learn how to use UNIX-based systems using the OS X Terminal? It uses bash 3.2, isn't this the same shell as the one found on most of the Linux machines? How does the fact that OS X is based on FreeBSD 4.4, if I'm not mistaking, affect this? Thanks in advance, and hopefully, I'll have a starting point ASAP.

  Read the article

• Ubuntu Hardy : Testing for environment variables in udev rules doesn't seem to work

  - by Fred

  I have a Ubuntu 8.04 LTS (server edition), and I need to write a udev rule for it to act upon plugging a USB thumb drive. However, I need a different action depending on the filesystem of the drive. I know I can use the ID_FS_TYPE environment variable to check for the filesystem on the drive. Following instructions found here, I try a dummy udev rule as such : KERNEL!="sd[a-z][0-9]", GOTO="my_udev_rule_end" ACTION=="add", RUN+="/usr/bin/touch /tmp/test_udev_%E{ID_FS_TYPE}" ACTION=="add", ENV{ID_FS_TYPE}=="vfat", RUN+="/usr/bin/touch /tmp/test_udev_it_works" LABEL="my_udev_rule_end" However, when I plug in a thumb drive with a vfat filesystem (which should trigger both rules), I end up with a file called /tmp/test_udev_vfat, meaning the first rule was triggered successfully, and that the ID_FS_TYPE environment variable is "vfat", but I don't have the other file, meaning that although I know the ID_FS_TYPE env variable is "vfat", I can't seem to check against it for a match. I tried googling the thing, but pretty much every result seems to assume ENV{ID_FS_TYPE}=="vfat" works. I also tested the exact same udev rule on Ubuntu 10.04 LTS server, and I have the same result. I'm probably missing something very simple, but I just don't get it. Does anyone see what is wrong with my udev rule that would prevent it from matching on ENV{ID_FS_TYPE}? Thanks.

  Read the article

• Windows 7 BSOD with Service Exception Error and Randomly Reboots

  - by Jason Shultz

  I've got a windows 7 laptop that BSOD with a Service Exception Error when I connect to a wireless network. It also does it when it's just sitting still doing nothing. I ran bluescreenview and here are the last four BSOD's from today: ================================================== Dump File : 051210-18642-01.dmp Crash Time : 5/12/2010 8:36:14 AM Bug Check String : SYSTEM_SERVICE_EXCEPTION Bug Check Code : 0x0000003b Parameter 1 : 00000000`c000001d Parameter 2 : fffff880`00000000 Parameter 3 : fffff880`06fda160 Parameter 4 : 00000000`00000000 Caused By Driver : Ntfs.sys Caused By Address : Ntfs.sys+7f030 File Description : Product Name : Company : File Version : Processor : x64 Computer Name : Full Path : C:\Windows\Minidump\051210-18642-01.dmp Processors Count : 2 Major Version : 15 Minor Version : 7600 ================================================== ================================================== Dump File : 051210-16551-01.dmp Crash Time : 5/12/2010 8:41:04 AM Bug Check String : SYSTEM_SERVICE_EXCEPTION Bug Check Code : 0x0000003b Parameter 1 : 00000000`c000001d Parameter 2 : fffff880`00000000 Parameter 3 : fffff880`06f40160 Parameter 4 : 00000000`00000000 Caused By Driver : ntoskrnl.exe Caused By Address : ntoskrnl.exe+70600 File Description : NT Kernel & System Product Name : Microsoft® Windows® Operating System Company : Microsoft Corporation File Version : 6.1.7600.16539 (win7_gdr.100226-1909) Processor : x64 Computer Name : Full Path : C:\Windows\Minidump\051210-16551-01.dmp Processors Count : 2 Major Version : 15 Minor Version : 7600 ================================================== ================================================== Dump File : 051210-17269-01.dmp Crash Time : 5/12/2010 8:45:51 AM Bug Check String : SYSTEM_SERVICE_EXCEPTION Bug Check Code : 0x0000003b Parameter 1 : 00000000`c000001d Parameter 2 : fffff880`00000000 Parameter 3 : fffff880`07db1160 Parameter 4 : 00000000`00000000 Caused By Driver : Ntfs.sys Caused By Address : Ntfs.sys+7f030 File Description : Product Name : Company : File Version : Processor : x64 Computer Name : Full Path : C:\Windows\Minidump\051210-17269-01.dmp Processors Count : 2 Major Version : 15 Minor Version : 7600 ================================================== ================================================== Dump File : 051210-19453-01.dmp Crash Time : 5/12/2010 5:46:25 PM Bug Check String : SYSTEM_SERVICE_EXCEPTION Bug Check Code : 0x0000003b Parameter 1 : 00000000`c000001d Parameter 2 : fffff880`00000000 Parameter 3 : fffff880`02625160 Parameter 4 : 00000000`00000000 Caused By Driver : win32k.sys Caused By Address : win32k.sys+2d4201 File Description : Product Name : Company : File Version : Processor : x64 Computer Name : Full Path : C:\Windows\Minidump\051210-19453-01.dmp Processors Count : 2 Major Version : 15 Minor Version : 7600 ==================================================  

  Read the article

• Xen HVM networking wont work

  - by Nathan

  I'm trying to get a Xen HVM network working using route however I am failing. Xen PV works fine using Ubuntu but when installing Ubuntu on HVM it fails to pick up the network. I'll let you know now that I'm not that experienced with Xen so I would appreciate any help. vm104 is the HVM thats causing me the problems, here is the configs that I believe should help resolve the problem. [root@eros vm104]# cat vm104.cfg import os, re arch = os.uname()[4] if re.search('64', arch): arch_libdir = 'lib64' else: arch_libdir = 'lib' kernel = '/usr/lib/xen/boot/hvmloader' builder = 'hvm' memory = 6000 shadow_memory = '8' cpu_weight = 256 name = 'vm104' vif = ['type=ioemu, ip=85.25.x.y, vifname=vifvm104.0, mac=00:16:3e:52:3d:fe, bridge=xenbr0'] acpi = 1 apic = 1 vnc = 1 vcpus = 4 vncdisplay = 3 vncviewer = 0 vncconsole = 1 vnclisten = '217.118.x.y' vncpasswd = 'kCfb5S4tE7' serial = 'pty' disk = ['phy:/dev/vpsvg/vm104_img,hda,w', 'file:/home/solusvm/xen/iso/Windows-Server-2008-RC2.iso,hdc:cdrom,r'] device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm' boot = 'cd' sdl = '0' usbdevice = 'tablet' pae=1 [root@eros /]# cat /etc/xen/xend-config.sxp | egrep -v "(^#.*|^$)" (xend-unix-server yes) (xend-unix-path /var/lib/xend/xend-socket) (xend-relocation-hosts-allow '^localhost$ ^localhost\\.localdomain$') (network-script network-route) (vif-script vif-route) (network-script 'network-route netdev=eth0') (dom0-min-mem 256) (dom0-cpus 0) (vnc-listen '0.0.0.0') (vncpasswd '') (keymap 'en-us') The Windows install will not pick up the network - I've tried setting the IP manually by using the Xen servers IP as the gateway and setting the main IP in Windows but no luck. If anyone needs any more information let me know and I appreciate any input!

  Read the article

• fail2ban Error Gentoo

  - by Mark Davidson

  Hi All I've recently setup a new VPS running Gentoo (My first time using the distro so please forgive me is this is a really easy one) and as I've done with other servers installed fail2ban. Setting it up to block the host via iptables, on too many unsuccessful logins with ssh. However I'm getting a strange error that I can't quite solve. When I start fail2ban I get these lines in the error log 2009-11-13 18:02:01,290 fail2ban.jail : INFO Jail 'ssh-iptables' started 2009-11-13 18:02:01,480 fail2ban.actions.action: ERROR iptables -N fail2ban-SSH iptables -A fail2ban-SSH -j RETURN iptables -I INPUT -p tcp --dport ssh -j fail2ban-SSH returned 100 If I try and force a ban these errors show up in the log and the host is not banned 2009-11-13 11:23:26,905 fail2ban.actions: WARNING [ssh-iptables] Ban XXX.XXX.XXX.XXX 2009-11-13 11:23:26,929 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-SSH returned 100 2009-11-13 11:23:26,930 fail2ban.actions.action: ERROR Invariant check failed. Trying to restore a sane environment 2009-11-13 11:23:27,007 fail2ban.actions.action: ERROR iptables -N fail2ban-SSH iptables -A fail2ban-SSH -j RETURN iptables -I INPUT -p tcp --dport ssh -j fail2ban-SSH returned 100 2009-11-13 11:23:27,016 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-SSH returned 100 2009-11-13 11:23:27,016 fail2ban.actions.action: CRITICAL Unable to restore environment My versions are as follows Linux masked 2.6.18-xen-r12 #2 SMP Wed Mar 4 11:45:03 GMT 2009 x86_64 Intel(R) Xeon(R) CPU E5504 @ 2.00GHz GenuineIntel GNU/Linux net-analyzer/fail2ban-0.8.4 net-firewall/iptables-1.4.3.2 If anyone could shead some light on these errors that would be great, I did wonder if it was a problem with iptables or some kernel modules but I can block an IP if I do. iptables -I INPUT -s 25.55.55.55 -j DROP so makes me think its something a bit more unusual. Thanks a lot in advance

  Read the article

• Is it possible to be a Linux professional studying on your own?

  - by Marc Jr

  I read economics at university(nothing to see with linux, isn't it? :P). I have some basic knowledge about booting process, Linux Kernel compiling from source and stuff like that. But of course I have still much to learn sometimes some errors appears and "voila" I am lost. I had: Ubuntu, Fedora, OpenSuse, Arch.. using Gentoo now. I'd like to know what you linux users, professionals, administrators... would think it is the best way to learn linux in a professional way. Is it worth studying it and passing the LPIC test enough to work in the linux world? or do I need going to IT uni? I've heard LFS is a good way of learning about linux, is that real? I've been thinking about getting to LFS learn about more deeply about the linux process and learning scripts. It is possible to do this way? if anyone has a tip or a good way of doing, maybe someone did it. Any tip is very welcome. Words from a person in love with linux. :D The best, Marc

  Read the article

• Experience with AMCC 3ware 9650se raid cards? Ours seems dead

  - by antiduh

  We have a 8-port 3ware 9650se raid card for our main disk array. We had to bring the server down for a pending power outage, and when we turned the machine back on, the raid card never started. This card has been in service for a couple years without problems, and was working up until the shutdown. Now, when we turn the machine on, the bios option rom that normally kicks in before the bootloader doesn't show up, none of the drives start, and when the OS tries to access the device, it just times out. The firmware on it has been upgraded in the past, so it's possible we've hit some sort of firmware bug. We're using it in a Silicon Mechanics R272 machine with gentoo for the OS. The OS eventually boots, but alas, without the card. We've ordered a new one, but I'm worried that if we replace the card it won't recognize the existing array. Has anybody performed a card swap before? Any help would be greatly appreciated. Edit: These are the kernel errors we see: 3ware 9000 Storage Controller device driver for Linux v2.26.02.012. 3w-9xxx 0000:09:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 3w-9xxx 0000:09:00.0: setting latency timer to 64 3w-9xxx: scsi0: ERROR: (0x06:0x000D): PCI Abort: clearing. 3w-9xxx: scsi0: ERROR: (0x06:0x001F): Microcontroller not ready during reset sequence. 3w-9xxx: scsi0: ERROR: (0x06:0x0036): Response queue (large) empty failed during reset sequence. 3w-9xxx 0000:09:00.0: PCI INT A disabled

  Read the article

• Can't start Bind9 on Ubuntu 10.04 + Plesk 10.1 - "named: no process found"

  - by bradley.ayers

  I've installed a fresh version of Ubuntu 10.04 64bit, I didn't install bind when choosing what packages should be installed in the Ubuntu installer. I downloaded the auto installer for Plesk 10.1 and installed it successfully. When I logged into the Plesk control panel and tried to change the password, it failed because it couldn't restart bind. I SSH'd into the box and tried a sudo /etc/init.d/bind9 restart and get the following: brad@ws01:/root# sudo /etc/init.d/bind9 restart * Stopping domain name service... bind9 WARNING: key file (/etc/bind/rndc.key) exists, but using default configuration file (/etc/bind/rndc.conf) rndc: connect failed: 127.0.0.1#953: connection refused named: no process found [ OK ] * Starting domain name service... bind9 [fail] Looking at tail /var/log/messages reveals a whole bunch of: Feb 23 16:08:21 ws01 kernel: [ 3840.065851] type=1503 audit(1298441301.831:31): operation="open" pid=5565 parent=5563 profile="/usr/sbin/named" requested_mask="::r" denied_mask="::r" fsuid=108 ouid=0 name="/var/named/run-root/etc/named.conf" Edit: After following ooshro's advice, bind runs, however I still get the named: no process found error: brad@ws01:/etc/apparmor.d$ sudo /etc/init.d/bind9 restart * Stopping domain name service... bind9 WARNING: key file (/etc/bind/rndc.key) exists, but using default configuration file (/etc/bind/rndc.conf) named: no process found [ OK ] * Starting domain name service... bind9 [ OK ]

  Read the article

• Running Mathematica-5 remotely

  - by oxinabox.ucc.asn.au

  I have Mathematica 5 - a powerful CAS. I have a cheap netbook (running Windows XP), wich not only is too slow to run mathmatica on, I doubt it has the harddrive space. I do however have remote access to a number of very powerful computers, (most of wich run variose Linuxes, but one of which is Windows Server 2008, though I'ld rather not use this one*). Mostly over SSH but other protocols can be arraged for some, I'm sure. So I'ld like to install Mathematica onto one of these machine and then run it remotely. Either from the command line via Putty or via some other method. I glanced through the mathematical documentation and read something about using some MathLink program, which links the front end installed on my computer to a remote kernel. Anyone have any experience with this? I'm not sure if this belongs here or in SuperUser. At the moment, it's being tinkered with, and when the tinkering stops it'll likely be used to run multiple thin terms. As compared to the Linux machines: I have access to a dual 2.4 Xeon with 3GB RAM, which the rest of the world seems to have completely forgotten about (runs freeBSD!).

  Read the article

• NFS v4, HA Migration, and stale handles on clients

  - by Karl Katzke

  I'm managing a server running NFS v4 with Pacemaker/OpenAIS. NFS is configured to use TCP. When I migrate the NFS server to another node in the Pacemaker cluster, even though the metadata is persisted, connections from the clients 'hang' and eventually time out after 90 seconds. After that 90 seconds, the old mountpoint becomes 'stale' and the mounted files can no longer be accessed. The 90 second grace period seems to be part of the server configuration and not the client configuration. I see this message on the server: kernel: NFSD: starting 90-second grace period If I restart the NFS client on the client nodes after I migrate (unmounting and then remounting the share), then I don't experience the problem, but connections and file transfers still interrupted. Three questions: What is the 90 second grace period? What's it there for? How can I keep the files from going stale on the clients without restarting them after I migrate the NFS server to another node? Is it actually possible to migrate the NFS server without having large file uploads drop?

  Read the article

• How can I close a port that appears to be orphaned by Xvfb?

  - by Jim Fiorato

  I'm running Xvfb on a FC8 Amazon EC2 image. On occasion Xvfb will crash (unable at the moment to find out the reason for the crash), and after crashing the TCP port will appear to be orphaned. I'm unable to get a PID to kill any process that may be using it. I'm starting Xvfb with: Xvfb :7 -screen 0 1024x768x24 & Examples of what I'm working with are below, the Xvfb port is (was) 6007: # netstat -ap Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:ssh *:* LISTEN 1894/sshd tcp 0 0 *:6007 *:* LISTEN - tcp 0 352 ip-10-84-69-165.ec2.int:ssh c-71-194-253-238.hsd1:51689 ESTABLISHED 2981/0 udp 0 0 *:bootpc *:* 1817/dhclient udp 0 0 *:bootpc *:* 1463/dhclient Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node PID/Program name Path unix 2 [ ] DGRAM 871 668/udevd @/org/kernel/udev/udevd unix 2 [ ACC ] STREAM LISTENING 5385 1880/dbus-daemon /var/run/dbus/system_bus_socket unix 6 [ ] DGRAM 5353 1867/rsyslogd /dev/log unix 2 [ ] DGRAM 11861 2981/0 unix 2 [ ] DGRAM 5461 1974/crond unix 2 [ ] DGRAM 5451 1904/console-kit-da unix 3 [ ] STREAM CONNECTED 5438 1880/dbus-daemon /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 5437 1904/console-kit-da unix 3 [ ] STREAM CONNECTED 5396 1880/dbus-daemon unix 3 [ ] STREAM CONNECTED 5395 1880/dbus-daemon unix 2 [ ] DGRAM 5361 1871/rklogd # lsof -i COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME dhclient 1463 root 3u IPv4 4704 UDP *:bootpc dhclient 1817 root 4u IPv4 5173 UDP *:bootpc sshd 1894 root 3u IPv4 5414 TCP *:ssh (LISTEN) sshd 2981 root 3u IPv4 11825 TCP ip-10-84-69-165.ec2.internal:ssh->c-71-194-253-238.hsd1.il.comcast.net:51689 (ESTABLISHED) Attempting to force the port closed with iptables doesn't seem to work either. iptables -A INPUT -p tcp --dport 6007 -j DROP I'm at a loss as to how to reclaim/free the port. From what I can tell, this port will remain in this state until the EC2 instance is shut down. So, how can I close this port so I can restart Xvfb?

  Read the article

• Xen dom0 reports incorrect amount of RAM with dom0_mem set

  - by xen_amnesiac

  I've done a fair bit of searching about this, but have found nothing that answers my question. I have a system with 6GB of RAM which acts as a Xen server. For reference, it runs Ubuntu 12.04. I've set the kernel parameter dom0_mem:512M,max:512M in /etc/default/grub as follows: GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=min:512M,max:512M" I've tried variations of that, with the same result. My question is this: With the above set, the dom0 reports in all applications a RAM amount of 422M. cat /proc/meminfo gives the following: $ cat /proc/meminfo MemTotal: 432472 kB MemFree: 54144 kB Buffers: 17640 kB Cached: 220104 kB SwapCached: 30172 kB Active: 136500 kB Inactive: 167780 kB Active(anon): 6156 kB Inactive(anon): 60516 kB Active(file): 130344 kB Inactive(file): 107264 kB Unevictable: 52 kB Mlocked: 52 kB SwapTotal: 1794044 kB SwapFree: 1682012 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 39572 kB Mapped: 8048 kB Shmem: 136 kB Slab: 44324 kB SReclaimable: 22012 kB SUnreclaim: 22312 kB KernelStack: 1280 kB PageTables: 3840 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 2010280 kB Committed_AS: 329192 kB VmallocTotal: 34359738367 kB VmallocUsed: 313988 kB VmallocChunk: 34359417340 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 524696 kB DirectMap2M: 0 kB top, htop, free -m, and byobu's RAM monitor all report the same amount. At first I thought this was because of the onboard graphics borrowing some memory, but have now switched to a dedicated GPU and it persists. Is this normal behavior, or has something gone amiss? It's just about 100MB of RAM that's "gone", and I have no idea where it went. I understand that it's normal that not all RAM is available for allocation, but does the system really take an amount relatively high to the amount of RAM available?

  Read the article

• Sparc v440 unable 2 boot after recommended patch install

  - by user100660

  After installing the October 2011 recommended patch bundle on a Solaris 10 the host fails to boot. The output is {0} ok boot SC Alert: Host System has Reset screen not found. keyboard not found. Keyboard not present. Using ttya for input and output. Sun Fire V440, No Keyboard Copyright 1998-2003 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.10.10, 8192 MB memory installed, Serial #54744555. Ethernet address 0:3:ba:43:55:eb, Host ID: 834355eb. Rebooting with command: boot Boot device: /pci@1f,700000/scsi@2/disk@0,0:a File and args: \ Evaluating: Out of memory Warning: Fcode sequence resulted in a net stack depth change of 1 Evaluating: Evaluating: The file just loaded does not appear to be executable. {3} ok If I do a boot -F failsafe the host come up and I'm able to mount the root device (ufs on /dev/dsk/c1t0d0s0) and nothing appears broken, i.e I can see the logfiles from the patch install etc. Root device still have 1GB+ free. Only 2 kernel patches was installed from the patch bundle: 144500-19 & 147440-02. Any hints how to debug it further, etc.

  Read the article

• WRTU54G-TM router with 3rd party firmware; Can custom firmware include stock binary portions?

  - by dlamblin

  I've been doing a lot of reading online about the Linksys WRTU54G-TM router model that I now own. It seems getting a custom firmware onto it is not a problem. But no one is talking about retaining the Voip features (yet). So far they're all disappointed that it's not a SIP machine and used GSM over IPSec. Personally I don't care about using it with non-t-mobile. If I take the original firmware, shouldn't I be able to extract it, and it's SquashFS image, and then move all of the t-mobile specific binaries for enabling the calling features over to a custom firmware installation (maybe OpenWRT)? You might ask why, and the reason is, that if I do this I could retain my calling features, which I do want, and ssh to the router and use it to run additional software, as any OpenWRT router could do. Does anyone know if this can be done, and how the firmware's binaries could be gotten at and installed correctly? Update I have found someone working on 3rd party WRTU54G-TM firmware. I am still interested in my second part of the questions, that is can't the stock firmware images be pulled apart and have the close-source, if any, binary kernel modules moved into another more flexible custom firmware?

  Read the article

• MySQL is killing the server IO.

  - by OneOfOne

  I manage a fairly large/busy vBulletin forums (running on gigenet cloud), the database is ~ 10 GB (~9 milion posts, ~60 queries per second), lately MySQL have been grinding the disk like there's no tomorrow according to iotop and slowing the site. The last idea I can think of is using replication, but I'm not sure how much that would help and worried about database sync. I'm out of ideas, any tips on how to improve the situation would be highly appreciated. Specs : Debian Lenny 64bit ~12Ghz (6x2GHz) CPU, 7520gb RAM, 160gb disk. Kernel : 2.6.32-4-amd64 mysqld Ver 5.1.54-0.dotdeb.0 for debian-linux-gnu on x86_64 ((Debian)) Other software: vBulletin 3.8.4 memcached 1.2.2 PHP 5.3.5-0.dotdeb.0 (fpm-fcgi) (built: Jan 7 2011 00:07:27) lighttpd/1.4.28 (ssl) - a light and fast webserver PHP and vBulletin are configured to use memcached. MySQL Settings : [mysqld] key_buffer = 128M max_allowed_packet = 16M thread_cache_size = 8 myisam-recover = BACKUP max_connections = 1024 query_cache_limit = 2M query_cache_size = 128M expire_logs_days = 10 max_binlog_size = 100M key_buffer_size = 128M join_buffer_size = 8M tmp_table_size = 16M max_heap_table_size = 16M table_cache = 96 Other : From the cloud's IO chart, we're averaging 100mb/s read. > vmstat procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 9 0 73140 36336 8968 1859160 0 0 42 15 3 2 6 1 89 5 > /etc/init.d/mysql status Threads: 49 Questions: 252139 Slow queries: 164 Opens: 53573 Flush tables: 1 Open tables: 337 Queries per second avg: 61.302. moved from superuser

  Read the article

• Solaris TCP stack tuning

  - by disserman

  We have a large web project (about 2-3k requests per second), using haproxy (http://haproxy.1wt.eu/) as a frontend and load balancer between the java application servers. The frontend (haproxy) is running on Linux but we are going to migrate it to the Solaris 10 as all our other servers are running under Solaris. After switching a traffic I see the two things: a) the web site became loading slower (5-10 seconds with images in comparison to 2-3 seconds on Linux) b) sometimes haproxy fails to perform a "lifecheck" (get a special web page and analyze http response code) due to the socket timeout. After switching traffic back to Linux everything is okay. I've tried to tune all params I found in /dev/tcp but no progress. I believe the problem is in some open socket limitations. If someone can point me to the answer, I would be greatly appreciated. p.s. haproxy is running under Xen DomU on Linux (Kernel 2.6.18, Debian 5), under zone on Solaris (10 u8). the only thing we did on Linux is increasing of ip_conntrack_max (I believe Solaris option tcp_conn_req_max_q is the equivalent).

  Read the article

• System hangs while rebooting on Debian...

  - by Usman

  Hi, I have Debian (Kernel 2.6.26-2-686) installed on two computers. On one of them it reboots quite finely but I am having following problem with rebooting Debian on my second computer. When i type reboot at the Linux prompt, following messages appear and system hangs up after saying "Restarting System": Broadcast message from root@myname (tty1) (Sun Jan 17 11:23:26 2010) The system is going down for reboot NOW! INIT: Switching to runlevel: 6 INIT: Sending processes the TERM signal Saving system clock Stopping enhanced syslog: rsyslogd. Asking all remaining processes to terminate...done. Deconfiguring network interfaces...done. Cleaning up ifupdown.... Deactivating swap...done. [ 31.789103] Restarting System. _ Normally when the sytem is busy "" sign blinks but "" at the last line above does not blink which shows, the system hanged up. I tried all keys but the screen is still frozen at the same point. The difference that I noted between my two computers is that I don't have ACPI support in the BIOS of the system which is giving me this error whereas the BIOS of my first computer do have ACPI support on which Debain do not give this restart-hanging problem. I have also disabled running the acpid script by running update-rc.d -f acpid remove but the problem still persists on the second computer. Any ideas to solve or get around this problem?

  Read the article

• Ping: sendmsg: operation not permitted error after installing iptables on Arch GNU/Linux

  - by estol

  Yesterday I got a new computer as my homeserver, a HP Proliant Microserver. Installed Arch Linux on it, with kernel version 3.2.12. After installing iptables (1.4.12.2 - the current version afaik) and changing the net.ipv4.ip_forward key to 1, and enabling forwarding in the iptables configuration file (and rebooting), the system cannot use any of its network itnerfaces. Ping fails with Ping: sendmsg: operation not permitted If I remove iptables completely, networking is okay, but I need to share the Internet connection to the local network. eth0 - wan NIC integrated on the motherboard (no idea of vendor, probably HP). eth1 - lan NIC in a pci-express slot (Intel Gigabit CT Desktop http://www.intel.com/content/www/us/en/network-adapters/gigabit-network-adapters/gigabit-ct-desktop-adapter.html) Since it works without iptables(server can access the internet, and I can login with ssh from the internal network), I assume it has something to do with iptables. I do not have much experience with iptables, so I used these as reference (separate from each other of course...): wiki.archlinux.org/index.php/Simple_stateful_firewall#Setting_up_a_NAT_gateway revsys.com/writings/quicktips/nat.html howtoforge.com/nat_iptables On my previous server, I used the revsys guide to set up nat, worked like a charm. Anyone experienced anything like this before? What am I doing wrong? Thanks, estol

  Read the article

< Previous Page | 165 166 167 168 169 170 171 172 173 174 175 176  | Next Page >