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  • Installing latest version of R-base

    - by Student
    I have been unsuccessfully trying to install the latest version (2.15.2) of r-base. Apparently, R package "Rcpp" would not install for R version 2.14.1 - the version that installs for me. I am not sure what/how/where to change my installation attempts which appear below. Please note that I am using ubuntu-12.04.1-server-i386. (1) ------------ The current installed version is R version 2.14.1 (2011-12-22) sudo apt-get install r-base Reading package lists... Done Building dependency tree Reading state information... Done r-base is already the newest version. (2) ------------ Including version information doesn't help: sudo apt-get install r-base=2.15.1-5ubuntu1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2.15.1-5ubuntu1' for 'r-base' was not found (3) ------------- Changes based on CRAN Ubuntu instructions http://cran.r-project.org/bin/linux/ubuntu/README 3.1: Added to /etc/apt/sources.list deb http://lib.stat.cmu.edu/R/CRAN/bin/linux/ubuntu quantal/ 3.2: sudo apt-get update 3.3: sudo apt-get install r-base Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: r-base : Depends: r-base-core (= 2.15.2-1quantal2) but it is not going to be installed Depends: r-recommended (= 2.15.2-1quantal2) but it is not going to be installed Recommends: r-base-html but it is not going to be installed E: Unable to correct problems, you have held broken packages.

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  • Ubuntu 12.04 and Nvidia GTX 550 Ti

    - by Jim
    OK I'm currently trying to install Ubuntu x64 Server 12.04 onto the following machine: Intel Core i5-2320 3.0GHz LGA1155 6MB 8 GB DDR3 RAM, Gigabyte Z68P-DS3 S1155 Intel Z68 DDR3 ATX M/B, OCZ 60 GB SSD, 3x Samsung 2TB drives in a RAID 5 array (via M/B) Now what I think is causing the issue is the following: EVGA GeForce GTX 550 Ti 951MHz 1GB PCI-Express HDMI FPB As the server CD works in text mode I haven't had a problem with actually installing Ubuntu. Partioned with: 1GB /boot SSD, 59GB / SSD, 10GB swap RAID5, ~4TB /home RAID5 On a straight boot, you briefly see the GRUB menu, followed by a blank screen. The keyboard and mouse blink as they are initialised but no sign of life from the screen. Followed by a bit of research (otherwise known as google) ... Booted in quiet splash nomodeset Now I have a fully working linux distro at the command prompt. I then proceed to try and update the nvidia drivers with apt-get (after updating repositories etc) and rebooting. Still the same problem. I also tried reinstalling from the CD and installing said drivers in the install process before GRUB was installed, still the same symptoms. Does anybody have any solutions? I'm at my wits end here, I bought this machine to be a linux server / tinkering machine and have just spent 4-5 hours trying to just get a basic install working.

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  • USB webcam detected in KVM, but doesn't work

    - by Gene Vincent
    I have installed XP in a virtual machine running on Linux with QEMU/KVM (qemu-kvm-0.11.0-4.5.2). I export my Linux webcam to KVM using the switches "-usb -usbdevice host:046d:0929". The XP guest sees the webcam and the drivers install, but the camera only shows a black image. When I open the camera in Windows Explorer, it says "0 images" and a black image, while on a real XP, it says "1 image" and shows the video from the camera. I tried the same with a different webcam, but the result is the same. Any ideas what might be wrong or how I could debug this ?

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  • Photoshop alternative with same keyboard shorcuts

    - by user292254
    tldr; Is there a program with the same keyboard shortcuts and/or user interface as PS. I know the "photoshop alternative" question has been asked so many times, but I feel this variant is worth the time to ask. I am a web designer and have been using PS daily on a windows or mac machine for about 10 years, but I do most of my development in linux. The only thing that has been keeping me from the full switch to linux is PS. I have tried many alternatives, including GIMP, but I feel the barrier to entry is too high for one reason and one reason only, the keyboard shortcuts. Over the years I have become very adept and quick in the use of PS because of keyboard shortcuts and muscle memory. I realize that many shortcuts can be customized, but many actions are just too different from PS. So my question is what programs are out there that are the closest to PS in keyboard shortcuts and interface. I don't care if I have to do a bunch of customization to get it as close as possible, but I just can't take too much time to learn a completely new workflow. Of course I realize that any software will take time and effort, I just want to make that time/effort as minimal as possible. Thanks in advance for your responses. edit I should tell you the most important features and workflow I use on a daily basis are, Smart objects, linked documents, save for web and devises.

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  • USB webcam detected in KVM, but doesn't work

    - by Gene Vincent
    I have installed XP in a virtual machine running on Linux with QEMU/KVM (qemu-kvm-0.11.0-4.5.2). I export my Linux webcam to KVM using the switches "-usb -usbdevice host:046d:0929". The XP guest sees the webcam and the drivers install, but the camera only shows a black image. When I open the camera in Windows Explorer, it says "0 images" and a black image, while on a real XP, it says "1 image" and shows the video from the camera. I tried the same with a different webcam, but the result is the same. Any ideas what might be wrong or how I could debug this ?

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  • Dual booted Windows 7 freezes after login screen

    - by Cathal
    First-time Linux user, using a Packard Bell Easy Note TS laptop. My problem arose after I dual boot installed Ubuntu 12.04 on Windows 7 via WUBI. I backed up all my data, and reinstalled Windows from factory settings on the recovery partition. When I first tried to install Ubuntu I mistakenly closed the lid at the start of the installation, stopping it. After that I rebooted, and my second installation attempt went without a hitch. Ubuntu works perfectly, the data on the partitions seem to be fine. My problem is I can't log back in to Windows 7. After selecting it in GRUB, and then in the Windows 7/ WUBI choice on boot, it loads up perfectly til the user log in screen. After the password is inputted, it stalls on the "Welcome" busy screen. This happens in Safe mode as well. Startup repair can't find a problem and neither can CHKDSK. System restore and Last known good config have no effect either. If anyone could help me out, I'd be real grateful. edit in response to the question below, since I don't know how to comment: Windows was installed first and its partitions are the first on the list. Should I move the windows partitions to after the Linux ones on the disk? Thanks for your help.

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  • Package libxul not fount - Kiwix Wikpedia in Ubuntu Precise 12.04

    - by JHOSmAN
    I'm trying to install the service Kiwix but I need a library that is not available for Ubuntu 12.04 LTS Precise leave the log and if someone could tell me how to install Seller would appreciate. kiwix-0.9# ls aclocal.m4 COMPILE config.sub COPYING install-sh ltmain.sh missing static AUTHORS config.guess configure depcomp kiwix Makefile.am README CHANGELOG config.log configure.ac desktop libxul-dev_1.8.1.16+nobinonly-0ubuntu1_all.deb Makefile.in src root@ubuntu-MM061:/home/ubuntu/Escritorio/kiwix-0.9# ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether to enable maintainer-specific portions of Makefiles... no checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking dependency style of g++... gcc3 checking for g++... g++ checking for cl... no checking for cl... no checking for Xcode... no checking for jar... jar checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking for a sed that does not truncate output... /bin/sed checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for fgrep... /bin/grep -F checking for ld used by gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 1572864 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking for /usr/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for ar... ar checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking how to run the C preprocessor... gcc -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking whether we are using the GNU C++ compiler... (cached) yes checking whether g++ accepts -g... (cached) yes checking dependency style of g++... (cached) gcc3 checking how to run the C++ preprocessor... g++ -E checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... yes checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld) supports shared libraries... yes checking whether -lc should be explicitly linked in... no checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking for ld used by g++... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes checking for g++ option to produce PIC... -fPIC -DPIC checking if g++ PIC flag -fPIC -DPIC works... yes checking if g++ static flag -static works... yes checking if g++ supports -c -o file.o... yes checking if g++ supports -c -o file.o... (cached) yes checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking for ranlib... (cached) ranlib checking whether make sets $(MAKE)... (cached) yes checking for pkg-config... pkg-config checking for perl... perl checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking float.h usability... yes checking float.h presence... yes checking for float.h... yes checking libintl.h usability... yes checking libintl.h presence... yes checking for libintl.h... yes checking limits.h usability... yes checking limits.h presence... yes checking for limits.h... yes checking stddef.h usability... yes checking stddef.h presence... yes checking for stddef.h... yes checking for stdint.h... (cached) yes checking for stdlib.h... (cached) yes checking for string.h... (cached) yes checking for strings.h... (cached) yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking for unistd.h... (cached) yes checking wchar.h usability... yes checking wchar.h presence... yes checking for wchar.h... yes checking for stdbool.h that conforms to C99... yes checking for _Bool... no checking for inline... inline checking for int16_t... yes checking for int32_t... yes checking for int64_t... yes checking for int8_t... yes checking for off_t... yes checking for pid_t... yes checking for size_t... yes checking for uint16_t... yes checking for uint32_t... yes checking for uint64_t... yes checking for uint8_t... yes checking for ptrdiff_t... yes checking vfork.h usability... no checking vfork.h presence... no checking for vfork.h... no checking for fork... yes checking for vfork... yes checking for working fork... yes checking for working vfork... (cached) yes checking for stdlib.h... (cached) yes checking for GNU libc compatible malloc... yes checking for working strtod... yes checking for getcwd... yes checking for gettimeofday... yes checking for memmove... yes checking for memset... yes checking for pow... yes checking for regcomp... yes checking for sqrt... yes checking for strcasecmp... yes checking for strchr... yes checking for strdup... yes checking for strerror... yes checking for strtol... yes Package libxul was not found in the pkg-config search path. Perhaps you should add the directory containing libxul.pc' to the PKG_CONFIG_PATH environment variable No package 'libxul' found Package libxul was not found in the pkg-config search path. Perhaps you should add the directory containinglibxul.pc' to the PKG_CONFIG_PATH environment variable No package 'libxul' found checking for /stable... no checking for "/nsISupports.idl"... no configure: error: unable to find nsISupports.idl apt-get install libxul Leyendo lista de paquetes... Hecho Creando árbol de dependencias Leyendo la información de estado... Hecho E: No se ha podido localizar el paquete libxul

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  • The November OBIEE 11.1.1.6.6 Bundle Patch has been released

    - by inowodwo
    The November Oracle Business Intelligence Enterprise Edition - OBIEE 11.1.1.6.6 Bundle Patch is now available for download from My Oracle Support For OBIEE on 11.1.1.6.0, the plan is to run a monthly bundle patch 11.1.1.6.6 bundle patch includes 67 bug fixes. 11.1.1.6.6 bundle patch is cumulative, so it includes everything in 11.1.1.6.1, 11.1.1.6.2, 11.1.1.6.2BP1, 11.1.1.6.4 and 11.1.1.6.5. Please note that this release is only recommended for BI customers i.e. not customers on Fusion Apps Bundled Patch Details (1 of 7) Oracle Business Intelligence Installer. (patch number 15844023) (2 of 7) Oracle Real Time Decisions. (patch number 15844066) (3 of 7) Oracle Business Intelligence Publisher (patch number 14800665) (4 of 7) Oracle Business Intelligence ADF Components. (patch number 15843961) (5 of 7) Enterprise Performance Management Components Installed from BI Installer 11.1.1.6.x (patch number 15844096) (6 of 7) Oracle Business Intelligence (patch number 14791926) (7 of 7) Oracle Business Intelligence Platform Client Installers and MapViewer (patch number 15839347) 11.1.1.6.6 bundle patch is available for the supported platforms : Microsoft Windows (32-bit) Linux x86 (32-bit) Microsoft Windows x64 (64-bit) Linux x86-64 (64-bit) Oracle Solaris on SPARC (64-bit) Oracle Solaris on x86-64 (64-bit) IBM AIX PPC (64-bit) HPUX- IA (64-bit)

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  • If you develop on multiple operating systems, is it better to have multiple computers + displays?

    - by dan
    I develop for iOS and Linux. My preferred OS is Ubuntu. Now my software shop (me and a partner) is developing for Windows too. Now the question is, is it more efficient to have multiple workstations, one for each target OS? Efficiency and productivity is a higher priority than saving money. I have a 3.4Ghz i7 desktop workstation running Ubuntu and virtualized Windows with two displays, and I'm putting together an even more powerful i7 Hackintosh with 16GB RAM (to replace my weak 2.2Ghz i5 Macbook Pro). My specific dilemma is whether I should sell the first computer and triple boot on the second one, or buy two more displays and run both desktop systems simultaneously. Would appreciate answers from developers who write software for multiple OSes. Running guest OSes in VirtualBox on one system not ideal, because in my experience performance is seriously degraded under virtualization. So the choice is between dual/triple booting on one system vs having two systems, one for OSX+iOS/Windows (dual boot) and the other for Ubuntu (which I prefer to use as my main OS). For much of our work, I write a server-side application in Linux and a client for iOS (or for Windows or OS X) simultaneously.

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  • Setting up scripts in Amazon EC2 Cloud

    - by racket99
    Hello, I am currently running a few perl and python scripts on a windows pc and would like to port over to the Amazon EC2 servers running 64-bit LINUX. The scripts are basic web scrapers that go to a variety of websites, get data and then save daily as csv files. I would like to install these in the cloud and get them running in an automated way so that they will run without my intervention. Also given that I don't want to lose all the data if the instance crashes, I should also upload the csv files to Amazon S3. Any idea how I can do this? I am not terribly versed in LINUX nor do I know Perl/Python well. What is the best way for me to tackle thi

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  • SDcardReader/Writer is not connected

    - by Insuk
    My IOGEAR sdCardReader/Writer is recongized on Ubutu(by using VM ware) but when I tried to connect to "Removable Devices - Alcor Micro Flash Card Reader/Writer" , the follwoing message is appeared. " The connection for the USB device "Alcor Micro Flash Card Reader/Writer" was unsuccessful. The device is currently in use. " But I think it is not used. Should I use IOGEAR driver for this one? When I connect the card reader, Ubuntu automatically got the "Alcor Micro Flash Card Reader/Writer" . How can I fix the problem? Thank you, Insuk the result of lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 0b95:7720 ASIX Electronics Corp. AX88772 Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub Bus 002 Device 004: ID 0e0f:0008 VMware, Inc. Bus 002 Device 005: ID 0403:bcda Future Technology Devices International, Ltd From the vmware log : 2013-10-18T09:00:07.494-06:00| vmx| I120: USB-CCID: Could not establish context: SCARD_E_NO_SERVICE(0x8010001d). 2013-10-18T09:00:07.494-06:00| vmx| I120: USB-CCID: Could not establish context: SCARD_E_NO_SERVICE(0x8010001d).

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  • Step 2 of instructions is not clear to me

    - by Albert Frye
    I want to make a bootable USB stick. I run the UUI. I see the instructions on this site: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows Step 1 says: Select "Ubuntu Desktop Edition" from the dropdown list Okay, so the actual title of the drop down box is: Select a "Linux Distribution" from the dropdown to put on your USB I am pretty new to computers. 67 years old. Live alone. Bought my first computer 3 months ago. So I will have to assume that when the instructions say "Ubuntu Desktop Edition", that means the same thing as "Linux Distribution". Okay, No big leap there. So far, so good . . . . . . . So I pick the very first selection: Ubuntu 13.10 Desktop i386 I'm not sure why there are so many choices, but I'm guessing I'm pretty safe with the first one. It's for a Toshiba Satellite laptop 64 bit Windows 7. Okay, now for step 2: The instructions say: Click 'Browse' and open the downloaded ISO file. The message in the window just before the "Browse" button says: Browse to your ubuntu-13.10*desktop*i386.iso -- Okay, so where's that file? So I click "Browse" and start looking for that file. It is nowhere to be found. So where the heck is it?

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  • How can I run a game server on a computer behind a NAT, if I have another computer not behind a NAT?

    - by Macha
    My home connection is part of a large NAT, outside my control. Inside my home, my router has a NAT, under my control. I control a public facing Linux VPS with one IP address, outside my home network. Ideally, what I'd like to do is set something up so that I connect my home computer to my VPS, and after that port X on my VPS leads to port Y on my home computer, for the purposes of running a game server of a game that does not run under Linux. Is this possible?

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  • Is there a way to make catalyst driver work in Trusty for the radeon hd4330?

    - by Laurent BERNABE
    Though official Catalyst software 13.1 is suitable for ati radeon hd4330, it can't be installed on Ubuntu 14.04 as it can't support Xorg = 7.6 As I need proprietary drivers for trusty, I would like to know if there is a way to bypass this limitation ? (For example by fetching driver sources) Here are some results from the terminal : $ Xorg -version X.Org X Server 1.15.1 Release Date: 2014-04-13 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.2.0-37-generic x86_64 Ubuntu Current Operating System: Linux bordeaux80 3.13.0-27-generic #50-Ubuntu SMP Thu May 15 18:06:16 UTC 2014 x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4015e6f7-d11a-45fd-ac9b-5b6c7ab9eaa0 ro quiet splash vt.handoff=7 Build Date: 16 April 2014 01:36:29PM xorg-server 2:1.15.1-0ubuntu2 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.30.2 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. $ xrandr Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 LVDS connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 353mm x 198mm 1366x768 60.0*+ 1280x720 59.9 1152x768 59.8 1024x768 59.9 800x600 59.9 848x480 59.7 720x480 59.7 640x480 59.4 VGA-0 disconnected (normal left inverted right x axis y axis) HDMI-0 disconnected (normal left inverted right x axis y axis) $ uname -rp 3.13.0-27-generic x86_64 $ glxinfo | grep OpenGL OpenGL vendor string: X.Org OpenGL renderer string: Gallium 0.4 on AMD RV710 OpenGL core profile version string: 3.1 (Core Profile) Mesa 10.1.0 OpenGL core profile shading language version string: 1.40 OpenGL core profile context flags: (none) OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 10.1.0 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions: Regards

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  • Unsure about TRIM enabled on my SSD

    - by user84750
    I have a SSD OCZ Vertex4 installed on my laptop. I'm running Ubuntu 12.04 LTS. I have enable TRIM by adding "discard" to my fstab file. (also added option noatime). I rebooted my Ubuntu and followed These instructions here to test TRIM. The end results of my tempfile was all ffff's, when it should have read all zero's, which is telling me TRIM is not really working or enabled correctly. Did I miss something? Also, will it be a problem if only my /home directory is encrypted. AND if you ask why I have swap on my SSD, it's because I let Ubuntu set up my partition. When I have my SSD, I just wanted to install Ubuntu as fast as possible. =) I've done testing to see at which point it will start to use swap and it took a lot of applications open to finally use swap. I currently have 4 GB of memory. I might shrink this to like 512 MB or 1 GB the most. Here's some info about my file system setup. sudo hdparm -I /dev/sda1 | grep "TRIM supported" Data Set Management TRIM supported (limit 16 blocks) sudo fdisk -l /dev/sda Device Boot Start End Blocks Id System /dev/sda1 * 2048 242016255 121007104 83 Linux /dev/sda2 242018302 250068991 4025345 5 Extended /dev/sda5 242018304 250068991 4025344 82 Linux swap / Solaris ls /dev/mapper control cryptswap1

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  • Why is domU faster than dom0 on IO?

    - by Paco
    I have installed debian 7 on a physical machine. This is the configuration of the machine: 3 hard drives using RAID 5 Strip element size: 1M Read policy: Adaptive read ahead Write policy: Write Through /boot 200 MB ext2 / 15 GB ext3 SWAP 10GB LVM rest (~500GB) emphasized text I installed postgresql, created a big database (over 1GB). I have an SQL request that takes a lot of time to run (a SELECT statement, so it only reads data from the database). This request takes approximately 5.5 seconds to run. Then, I installed XEN, created a domU, with another debian distro. On this OS, I also installed postgresql, with the same database. The same SQL request takes only 2.5 seconds to run. I checked the kernel on both dom0 and domU. uname-a returns "Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2+deb7u2 x86_64 GNU/Linux" on both systems. I checked the kernel parameters, which are approximately the same. For those that are relevant, I changed their values to make them match on both systems using sysctl. I saw no changes (the requests still take the same amount of time). After this, I checked the file systems. I used ext3 on domU. Still no changes. I installed hdparm, and ran hdparm -Tt on both systems, on all my partitions on both systems, and I get similar results. Now, I am stuck, I don't know what is different, and what could be the cause of such a big difference. Additional Info: Debian runs on a Dell server PowerEdge 2950 postgresql: 9.1.9 (both dom0 and domU) xen-linux-system: 3.2.0 xen-hypervisor: 4.1 Thanks EDIT: As Krzysztof Ksiezyk suggested, it might be due to some file caching system. I ran the dd command to test both the read and write speed. Here is domU: root@test1:~# dd if=/dev/zero of=/root/dd count=5MB bs=1MB ^C2020+0 records in 2020+0 records out 2020000000 bytes (2.0 GB) copied, 18.8289 s, 107 MB/s root@test1:~# dd if=/root/dd of=/dev/null count=5MB bs=1MB 2020+0 records in 2020+0 records out 2020000000 bytes (2.0 GB) copied, 15.0549 s, 134 MB/s And here is dom0: root@debian:~# dd if=/dev/zero of=/root/dd count=5MB bs=1MB ^C1693+0 records in 1693+0 records out 1693000000 bytes (1.7 GB) copied, 8.87281 s, 191 MB/s root@debian:~# dd if=/root/dd of=/dev/null count=5MB bs=1MB 1693+0 records in 1693+0 records out 1693000000 bytes (1.7 GB) copied, 0.501509 s, 3.4 GB/s What can be the cause of this caching system? And how can we "fix" it? Can we apply it to dom0? EDIT 2: I switched my virtual disk type. To do so I followed this article. I did a dd if=/dev/vg0/test1-disk of=/mnt/test1-disk.img bs=16M Then in /etc/xen/test1.cfg, I changed the disk parameter to use file: instead of phy: it should have removed the file caching, but I still get the same numbers (domU being much faster for Postgres)

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  • What IRC client do you use on Windows?

    - by Ross
    I used to use XChat, until i realised it was only free on Linux. It was my favourite IRC client I've used and it's my preferred choice on Linux now. I moved to mIRC but it's not perfect imo. I should try to get to use irssi more but I have a thing for GUIs. Terminal-style apps are ok but not something I'd like to spend ages looking at, especially on Windows. What GUI-based client do you use on Windows and why?

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  • tail -f updates slowly

    - by Cliff
    I'm not sure why, but on my Macbook Pro running lion I get slow updates when I issue "tail -f" on a log file that is being written to. I used to use this command all the time at my last company but that was typically on Linux machines. The only thing I can think of that would possibly slow the updates are buffering of output and/or maybe a different update interval on a Mac vs. Linux. I've tried with several commands all which write to stout relatively quickly but give slow updates to the tail command. Any ideas? Update I am merely running a python script with a bunch of prints in it and redirecting to a file vi " my output.log". I expect to see updates near real time but that doesn't seem to be the case.

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  • Black login screen Ubuntu 12.04 if WGA cable pluged in on reboot

    - by Sulliwane
    I'm using Ubuntu 12.04.1, 64 bits, installed on a Z77 Pro4 (ASrock motherboard), crucial M4 SSD drive (sata 3), and intel i5 3570k (ivy bridge). I have this annoying problem : When I startup the computer, I get a CLI login prompt : At this moment, if I press enter, i get the usual CLI login prompt. If not, here is what I get : From now, if I login using CLI, i identify the lightdm processus, kill and start it : #ps -A | grep lightdm #sudo kill -9 1273 #sudo lightdm and miracle, these commands bring back the gui login screen. BUT It's very annoying as I have to repeat these steps at every boot, and the people using this desktop are not familiar with linux at all! So I tried to figure out the cause and here is what I found : If, when I shutdown the computer, the WGA cable is not pluged in, then Ubuntu will boot on GUI login screen without a glitch! But If the WGA cable is pluged in when shuting down, I will get CLI login prompt... Note 1: I installed linux kernel 3.4, but it hasn't solve the problem. Note 2: Is it linked to the new HD 4000 integrated graphic processor ? Note 3: If i boot on an USB stick (Ubuntu 12.04), NO problems ! Note 4: If booting on the SSD, when clicking "shutdown" button, the shutdown process never ends up (logout screen keep displaying and fans are still rolling). But if booting on USB stick, the shutdown action runs properly.

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  • Windows Server 2003 guest on Xen frequently stops responding

    - by smokris
    I'm running a Windows Server 2003 guest instance in Xen 3.x. This DomU runs fine for a day or two, then stops responding — I don't get any network response, and I can no longer connect to Xen's VNC console for this DomU. xm list shows this: Name ID Mem VCPUs State Time(s) Domain-0 0 6508 8 r----- 1161159.4 [A working Linux DomU] 1 512 1 -b---- 68711.1 [The hung Windows DomU] 5 512 1 ------ 67234.2 [Another working Linux DomU] 3 512 1 -b---- 163036.4 (What does the ------ mean? The xm manual explains what each of the six states mean, but not what no-state means.) If I xm destroy and then xm create the Windows DomU again, it boots right back up (with the Windows alert The previous system shutdown at [...] was unexpected.), and then stops responding after another day or two. I checked /var/log/xen/*.log, but no log messages are generated at the time the server stops responding. How should I proceed in troubleshooting this?

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  • Why ping another inet machine from MacBook get netgate's ip address?

    - by Xinwang
    I have three machine in my home network connected by a wireless router. One is server installed linux at 192.168.1.1, another is Thinkpad with MS Windows XP at 192.168.1.2, last one is MacBook Pro with Mac OS X 10.6.3 at 192.168.1.3. When I ping the Linux Server from Thinkpad (MS Windows XP) I can get the correct ip address, but when I ping it from Mac I get the global address of my router, like 61.135.181.175. Could you tell me why this happen? And how do I get same ping result on Mac and Windows. Thanks

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  • x server startx error?

    - by Chris
    root@thewhitewox:~# startx X.Org X Server 1.7.6 Release Date: 2010-03-17 X Protocol Version 11, Revision 0 Build Operating System: Linux 2.6.24-29-server i686 Ubuntu Current Operating System: Linux thewhitewox 2.6.18-238.9.1.el5.028stab089.1 #1 SMP Thu Apr 14 14:06:01 MSD 2011 i686 Kernel command line: quiet Build Date: 20 October 2011 03:05:54PM xorg-server 2:1.7.6-2ubuntu7.10 (For technical support please see ww w.ubuntu . com/support) Current version of pixman: 0.16.4 Before reporting problems, check http: //wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov 15 00:50:32 2011 (==) Using config directory: "/usr/lib/X11/xorg.conf.d" Fatal server error: xf86OpenConsole: Cannot open /dev/tty0 (No such file or directory) Please consult the The X.Org Foundation support at http ://wiki.x.org for help. Please also check the log file at "/var/log/Xorg.0.log" for additional information. ddxSigGiveUp: Closing log What does this mean and how can I fix it?

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  • wget-ing protected content with exported cookies

    - by XXL
    i have exported a pair of cookies from firefox that are valid for the URL in question and tried accessing/downloading the protected content off that addr., but the end result is a return to the login page. i have tried doing about the same thing for 3 other websites with similiar outcome. any clues as to what might i be doing wrong? the syntax i'm using: wget --load--cokies=FILE URL DEBUG output created by Wget 1.12 on linux-gnu. Stored cookie www.x.org -1 (ANY) / [expiry 1901-12-13 22:25:44] c_secure_login lz8xZQ%3D%3D Stored cookie www.x.org -1 (ANY) / [expiry 1901-12-13 22:25:44] c_secure_pass 2fd4e1c67a2d28fced849ee1bb76e74a Stored cookie www.x.org -1 (ANY) / [expiry 1901-12-13 22:25:44] c_secure_uid GZX4TDA%3D --2011-01-14 13:57:02-- www.x.org/download.php?id=397003 Resolving www.x.org... 1.1.1.1 Caching www.x.org = 1.1.1.1 Connecting to www.x.org|1.1.1.1|:80... connected. Created socket 5. Releasing 0x0943ef20 (new refcount 1). ---request begin--- GET /download.php?id=397003 HTTP/1.0 User-Agent: Wget/1.12 (linux-gnu) Accept: / Host: www.x.org Connection: Keep-Alive ---request end--- HTTP request sent, awaiting response... ---response begin--- HTTP/1.1 302 Found Date: Fri, 14 Jan 2011 11:26:19 GMT Server: Apache X-Powered-By: PHP/5.2.6-1+lenny8 Set-Cookie: PHPSESSID=5f2fd97103f8988554394f23c5897765; path=/ Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Location: www.x.org/login.php?returnto=download.php%3Fid%3D397003 Vary: Accept-Encoding Content-Length: 0 Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Content-Type: text/html ---response end--- 302 Found Stored cookie www.x.org -1 (ANY) / [expiry none] PHPSESSID 5f2fd97103f8988554394f23c5897765 Registered socket 5 for persistent reuse. Location: www.x.org/login.php?returnto=download.php%3Fid%3D397003 [following] Skipping 0 bytes of body: [] done. --2011-01-14 13:57:02-- www.x.org/login.php?returnto=download.php%3Fid%3D397003 Reusing existing connection to www.x.org:80. Reusing fd 5. ---request begin--- GET /login.php?returnto=download.php%3Fid%3D397003 HTTP/1.0 User-Agent: Wget/1.12 (linux-gnu) Accept: / Host: www.x.org Connection: Keep-Alive Cookie: PHPSESSID=5f2fd97103f8988554394f23c5897765 ---request end--- HTTP request sent, awaiting response... ---response begin--- HTTP/1.1 200 OK Date: Fri, 14 Jan 2011 11:26:20 GMT Server: Apache X-Powered-By: PHP/5.2.6-1+lenny8 Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Vary: Accept-Encoding Content-Length: 2171 Keep-Alive: timeout=15, max=99 Connection: Keep-Alive Content-Type: text/html ---response end--- 200 OK Length: 2171 (2.1K) [text/html] Saving to: `x.out' 0K .. 100% 18.7M=0s 2011-01-14 13:57:02 (18.7 MB/s) - `x.out' saved [2171/2171]

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  • Why is idle windows VM using so much CPU?

    - by Jeff Shattock
    I have 2 VMs running as guests on a KVM virtualization platform running on Ubuntu 10.04. One VM is an Ubuntu 10.04 system, the other is a Windows 7 system. When both machines are completely logged out, the Linux machine uses 1% CPU, the Windows one 45-50%, according to top. The graphs in virt-manager seem to back this up. Theres nothing installed on the Win7 image that would be running in the background; its as fresh as can be. Why is the Windows VM using so much more than the Linux VM, when both are logged out and idling?

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