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  • Tutorial: Linux Boot Camp: How Linux Boots (part 1)

    Booting. Sometimes it seems like it takes forever. What's the computer doing all that time? How do you find out? The Linux boot sequence is surprisingly simple, and the best part is that almost all of it is controlled by shell scripts you can read -- and even edit yourself.

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  • KVM slow guest i/o

    - by Akarot
    Host: Debian 6.0 (squeeze) with qemu-kvm and libvirt from squeeze-backports ii qemu-kvm 1.0+dfsg-8~bpo60+1 ii libvirt-bin 0.9.8-2~bpo60+2 Has 3TB sata drives with software raid and lvm. It has a sequential write speed of ~140MB/s measured with dd bs=1M count=512 if=/dev/zero of=test conv=fdatasync Elevator set to cfq Guest Debian 6.0 (squeeze) Uses LVM as storage. Drivers are virtio and cache='none' Sequential write speed is considerably slower with only 25-50MB/s Elevator set to noop I'm kind of running out of ideas for further tweaks but I'm sure that I/O speed should be much faster because many people are reporting almost native performance with lvm.

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  • Files built with a makefile are disapearing (including the binary)

    - by Reid
    I am building a program on a TS-7800(SBC), and when I run make (show below), it appears to go through all of the steps normally, but in the end i do not get a binary file. Why is this, and how can I get my file. makefile CC= /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc # compiler options #CFLAGS= -O2 CFLAGS= -mcpu=arm9 #CFLAGS= -pg -Wall # linker LN= $(CC) # linker options LNFLAGS= #LNFLAGS= -pg # extra libraries used in linking (use -l command) LDLIBS= -lpthread # source files SOURCES= HMITelem.c Cpacket.c GPS.c ADC.c Wireless.c Receivers.c CSVReader.c RPM.c RS485.c # include files INCLUDES= Cpacket.h HMITelem.h CSVReader.h RS485.h # object files OBJECTS= HMITelem.o Cpacket.o GPS.o ADC.o Wireless.o Receivers.o CSVReader.o RPM.o RS485.o HMITelem: $(OBJECTS) $(LN) $(LNFLAGS) -o $@ $(OBJECTS) $(LDLIBS) .c.o: $*.c $(CC) $(CFLAGS) -c $*.c RUN : ./HMITelem #clean: # rm -f *.o # rm -f *~ Output root@ts7800:ReidTest# make /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c HMITelem.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c Cpacket.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c GPS.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c ADC.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c Wireless.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c Receivers.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c CSVReader.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c RPM.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c RS485.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -o HMITelem HMITelem.o Cpacket.o GPS.o ADC.o Wireless.o Receivers.o CSVReader.o RPM.o RS485.o -lpthread Thank you.

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  • Using ZFS or XFS on a Xen guest running Linux

    - by zoot
    Background: I'm investigating the viability of using a filesystem other than ext3/4, with the ability to run snapshots for backup and rollback purposes. The servers under consideration are mailbox server nodes running on Linode's Xen based VPS platform. I'm particularly drawn to the various published benefits which ZFS offers in terms of data integrity and this year's stable release of native ZFS support in Linux - http://zfsonlinux.org ZFS appears to be the more thorough option in terms of benefits and simplicity (instead of LVM+XFS). Please note that I have little experience with ZFS (which I use on a local FreeNAS installation) and none with XFS, hence the post. To date, my servers are using ext3 filesystems, not managed under LVM. Question in detail: So, I have two questions. (1) Which of the two filesystems would be the better choice for the best of all of the following 3 aspects, running on a Xen Linux guest? Snapshots Data Integrity Performance (2) If ZFS is a viable option, is it practical to use ZRAID across Xen disk images to further enhance the solution for data integrity? Note: I'm reluctant to consider btrfs, given the many warnings I've read about in using it on production systems.

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  • A good Linux alternative to Ubuntu for a working environment.

    - by Roozak
    Hi, Im running a decent laptop with 3GB ram and 2GHz Core Duo. I use it mainly for working which requires several SSH and SFTP connections to servers and running a VM most of the time. Nothing much more intensive than that. I like using Ubuntu 9.10 however I have the issue of Nautilus and the top/bottom menus freezing up on me constantly - dare I say it, alot more problems than when I was using Windows Vista. Im just looking for recommendations of other operating systems which would be suitable for the task. Thanks

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  • sharing a folder between linux and windows over the internet

    - by valya
    Hello Currently my job is to make websites with Django. I use many things like virtualenv, PIL, etc. The problem is, I can't stand Linux on my desktop. I like it on servers, It's greate to use it over the SSH. But for desktop? No way. But for the development Linux is quite essential. Of course almost everything is ported to Windows, but it's not as simple to use as in Linux. For example, Windows shell is awful in comparison with Linux. So I've tried Cygwin, but it's too damn slow. Every time django dev server reloads, it tooks almost 20-30 seconds. In comparison, then using "native" python on Windows or Linux, it reloads instantly. Even worse, Cygwin makes all my system very slow. I've been thinking about it and have thought up a way to go. I can share a folder with my application with some Linux box. The devserver and everything will run on that box, while I'll be happy editing files and running the browser on my Windows 7. SSH shell is much quickier and handy than Cygwin. Currently there are no Linux boxes in my home network (except for my android phone :) but I have several VDS boxes with Debian. So, how do I share a Windows folder with VDS box? I can't rely on my desktop IP but I can rely on the VDS's one. I need sharing to be as quick as possible (well, 2-3 seconds ping is OK) and "native" for both systems, so I could use a folder like a normal folder in both Windows and Linux.

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  • 1000 HZ linux kernel necessary if I have tickless and high resolution timer?

    - by Bob
    I am trying to improve performance on my server. I have a few processes that need low jitter (less than 10ms variance). I have a load average of 4 maximum on an i7-920 (4 physical cores, 8 with HT). There are about 10 processes ranging from 40% to 90% of a core user mode. System usage is 3% total. Total CPU usage is 80% max. Will setting the kernel from 100hz to 1000hz improve the jitter if tickless and high resolution timers are already set? This page seems to indicate it still does something. https://lkml.org/lkml/2009/4/28/401 How about changing from voluntary (PREEMPT_VOLUNTARY) to preemptible (PREEMPT)?

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  • How do I restore system default settings on Linux Mint KDE?

    - by Robert Kelly
    I did something weird and now my text size is like 3pt on every system window, but when I go in and change my window fonts to larger to something that looks normal, it makes my clock, bash, and other fonts absolutely gigantic. Is there any way I can just roll back my system and it's settings? It wouldn't be much bother as I installed the OS yesterday. I'd hate to have to reinstall entirely though, but I guess it's an option.

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  • Arch Linux: How to handle patches which only you will use?

    - by user12932
    I'm using freerdp together with xmonad and it has been giving me a lot of trouble. The super key (or "windows key") is my mod key in xmonad and it has been interfering with my freerdp usage rather annoyingly. Whenever I switched workspaces (or did anything else in xmonad involving the super key), windows (controlled by the freerdp instance in focus) registered a keypress as well. This event combined with the loss of focus got the super key stuck in windows indefinitely: the press of the keys d and r would first show my desktop, then open the run dialog (as if I was pressing the windows key constantly). I've tried several versions of freerdp, but all exhibited this annoying behavior. So I resorted to patching freerdp myself to just ignore the left super key on my keyboard. I love free software for a lot of reasons (especially the ability to alter things like this myself), however I still find it annoying to patch and rebuild freerdp on all version (and dependency) changes. How do you deal with situations like this? Is there even a "right way" to resolve this issue?

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  • Cannot login to fresh Kubuntu installation as admin, but only as guest

    - by Cedric Reichenbach
    I just installed a fresh Kubuntu 12.10 on a machine beside Windows 7. After successful installation, I rebooted and wanted to login. But when I type my password and hit Enter, some command line screen shows up for the split of a second and then it thows me back to the login screen without any error message. It's hard to spot what the command line text says, but I couldn't see any error or something like that. Anyway, when I log in as guest (without password), everything works finely. Also, when going to a system command line (using Ctrl+Alt+F1), I can login with my account without any problems. Does anyone have a clue what is going on and how to fix it?

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  • slow virtualbox guest

    - by ecoologic
    I run a guest ubuntu 12.04 on a host ubuntu 12.04, with virtual box, and the guest is much, much slower than the host (ALT+TAB costs 4-5secs). I had a look around and I found contradicting opinions on virtualbox vs vmware (free), so I taught to keep the former. Both systems are updated, I installed the additions on the guest and I evenly split memory and video memory (64mb) between guest and host. I am running a toshiba m200 laptop with 4GB ram and shared video memory. The host bios does not include a configuration option for machine virtualization. I have 2 cpus and I can't give them both to the vm. Is there anything I overlooked that could solve my problem? Feel free to ask for more info, and thank you for any help. EDIT Idling with the monitor open the (single) guest cpu never gets below 55% and could raise to 80 - 90% just moving the mouse around, opening ff will cause the monitor to run 100% in the guest, while the host shows that both cpus are evenly working around 60%. My cpu is Intel® Core™2 Duo CPU T5450 @ 1.66GHz × 2. If this is not a configuration problem, does it mean my machine is too weak for virtualization?

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  • Complete Guide to Symbolic Links (symlinks) on Windows or Linux

    - by Matthew Guay
    Want to easily access folders and files from different folders without maintaining duplicate copies?  Here’s how you can use Symbolic Links to link anything in Windows 7, Vista, XP, and Ubuntu. So What Are Symbolic Links Anyway? Symbolic links, otherwise known as symlinks, are basically advanced shortcuts. You can create symbolic links to individual files or folders, and then these will appear like they are stored in the folder with the symbolic link even though the symbolic link only points to their real location. There are two types of symbolic links: hard and soft. Soft symbolic links work essentially the same as a standard shortcut.  When you open a soft link, you will be redirected to the folder where the files are stored.  However, a hard link makes it appear as though the file or folder actually exists at the location of the symbolic link, and your applications won’t know any different. Thus, hard links are of the most interest in this article. Why should I use Symbolic Links? There are many things we use symbolic links for, so here’s some of the top uses we can think of: Sync any folder with Dropbox – say, sync your Pidgin Profile Across Computers Move the settings folder for any program from its original location Store your Music/Pictures/Videos on a second hard drive, but make them show up in your standard Music/Pictures/Videos folders so they’ll be detected my your media programs (Windows 7 Libraries can also be good for this) Keep important files accessible from multiple locations And more! If you want to move files to a different drive or folder and then symbolically link them, follow these steps: Close any programs that may be accessing that file or folder Move the file or folder to the new desired location Follow the correct instructions below for your operating system to create the symbolic link. Caution: Make sure to never create a symbolic link inside of a symbolic link. For instance, don’t create a symbolic link to a file that’s contained in a symbolic linked folder. This can create a loop, which can cause millions of problems you don’t want to deal with. Seriously. Create Symlinks in Any Edition of Windows in Explorer Creating symlinks is usually difficult, but thanks to the free Link Shell Extension, you can create symbolic links in all modern version of Windows pain-free.  You need to download both Visual Studio 2005 redistributable, which contains the necessary prerequisites, and Link Shell Extension itself (links below).  Download the correct version (32 bit or 64 bit) for your computer. Run and install the Visual Studio 2005 Redistributable installer first. Then install the Link Shell Extension on your computer. Your taskbar will temporally disappear during the install, but will quickly come back. Now you’re ready to start creating symbolic links.  Browse to the folder or file you want to create a symbolic link from.  Right-click the folder or file and select Pick Link Source. To create your symlink, right-click in the folder you wish to save the symbolic link, select “Drop as…”, and then choose the type of link you want.  You can choose from several different options here; we chose the Hardlink Clone.  This will create a hard link to the file or folder we selected.  The Symbolic link option creates a soft link, while the smart copy will fully copy a folder containing symbolic links without breaking them.  These options can be useful as well.   Here’s our hard-linked folder on our desktop.  Notice that the folder looks like its contents are stored in Desktop\Downloads, when they are actually stored in C:\Users\Matthew\Desktop\Downloads.  Also, when links are created with the Link Shell Extension, they have a red arrow on them so you can still differentiate them. And, this works the same way in XP as well. Symlinks via Command Prompt Or, for geeks who prefer working via command line, here’s how you can create symlinks in Command Prompt in Windows 7/Vista and XP. In Windows 7/Vista In Windows Vista and 7, we’ll use the mklink command to create symbolic links.  To use it, we have to open an administrator Command Prompt.  Enter “command” in your start menu search, right-click on Command Prompt, and select “Run as administrator”. To create a symbolic link, we need to enter the following in command prompt: mklink /prefix link_path file/folder_path First, choose the correct prefix.  Mklink can create several types of links, including the following: /D – creates a soft symbolic link, which is similar to a standard folder or file shortcut in Windows.  This is the default option, and mklink will use it if you do not enter a prefix. /H – creates a hard link to a file /J – creates a hard link to a directory or folder So, once you’ve chosen the correct prefix, you need to enter the path you want for the symbolic link, and the path to the original file or folder.  For example, if I wanted a folder in my Dropbox folder to appear like it was also stored in my desktop, I would enter the following: mklink /J C:\Users\Matthew\Desktop\Dropbox C:\Users\Matthew\Documents\Dropbox Note that the first path was to the symbolic folder I wanted to create, while the second path was to the real folder. Here, in this command prompt screenshot, you can see that I created a symbolic link of my Music folder to my desktop.   And here’s how it looks in Explorer.  Note that all of my music is “really” stored in C:\Users\Matthew\Music, but here it looks like it is stored in C:\Users\Matthew\Desktop\Music. If your path has any spaces in it, you need to place quotes around it.  Note also that the link can have a different name than the file it links to.  For example, here I’m going to create a symbolic link to a document on my desktop: mklink /H “C:\Users\Matthew\Desktop\ebook.pdf”  “C:\Users\Matthew\Downloads\Before You Call Tech Support.pdf” Don’t forget the syntax: mklink /prefix link_path Target_file/folder_path In Windows XP Windows XP doesn’t include built-in command prompt support for symbolic links, but we can use the free Junction tool instead.  Download Junction (link below), and unzip the folder.  Now open Command Prompt (click Start, select All Programs, then Accessories, and select Command Prompt), and enter cd followed by the path of the folder where you saved Junction. Junction only creates hard symbolic links, since you can use shortcuts for soft ones.  To create a hard symlink, we need to enter the following in command prompt: junction –s link_path file/folder_path As with mklink in Windows 7 or Vista, if your file/folder path has spaces in it make sure to put quotes around your paths.  Also, as usual, your symlink can have a different name that the file/folder it points to. Here, we’re going to create a symbolic link to our My Music folder on the desktop.  We entered: junction -s “C:\Documents and Settings\Administrator\Desktop\Music” “C:\Documents and Settings\Administrator\My Documents\My Music” And here’s the contents of our symlink.  Note that the path looks like these files are stored in a Music folder directly on the Desktop, when they are actually stored in My Documents\My Music.  Once again, this works with both folders and individual files. Please Note: Junction would work the same in Windows 7 or Vista, but since they include a built-in symbolic link tool we found it better to use it on those versions of Windows. Symlinks in Ubuntu Unix-based operating systems have supported symbolic links since their inception, so it is straightforward to create symbolic links in Linux distros such as Ubuntu.  There’s no graphical way to create them like the Link Shell Extension for Windows, so we’ll just do it in Terminal. Open terminal (open the Applications menu, select Accessories, and then click Terminal), and enter the following: ln –s file/folder_path link_path Note that this is opposite of the Windows commands; you put the source for the link first, and then the path second. For example, let’s create a symbolic link of our Pictures folder in our Desktop.  To do this, we entered: ln -s /home/maguay/Pictures /home/maguay/Desktop   Once again, here is the contents of our symlink folder.  The pictures look as if they’re stored directly in a Pictures folder on the Desktop, but they are actually stored in maguay\Pictures. Delete Symlinks Removing symbolic links is very simple – just delete the link!  Most of the command line utilities offer a way to delete a symbolic link via command prompt, but you don’t need to go to the trouble.   Conclusion Symbolic links can be very handy, and we use them constantly to help us stay organized and keep our hard drives from overflowing.  Let us know how you use symbolic links on your computers! Download Link Shell Extension for Windows 7, Vista, and XP Download Junction for XP Similar Articles Productive Geek Tips Using Symlinks in Windows VistaHow To Figure Out Your PC’s Host Name From the Command PromptInstall IceWM on Ubuntu LinuxAdd Color Coding to Windows 7 Media Center Program GuideSync Your Pidgin Profile Across Multiple PCs with Dropbox TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Gadfly is a cool Twitter/Silverlight app Enable DreamScene in Windows 7 Microsoft’s “How Do I ?” Videos Home Networks – How do they look like & the problems they cause Check Your IMAP Mail Offline In Thunderbird Follow Finder Finds You Twitter Users To Follow

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  • HTG Explains: What’s the Difference Between Ubuntu & Linux Mint?

    - by Chris Hoffman
    Ubuntu and Linux Mint are two of the most popular desktop Linux distributions at the moment. If you’re looking to take the dive into Linux – or you’ve already used Ubuntu or Mint – you wonder how they’re different. Linux Mint and Ubuntu are closely related — Mint is based on Ubuntu. Although they were very similar at first, Ubuntu and Linux Mint have become increasingly different Linux distributions with different philosophies over time. How To Customize Your Wallpaper with Google Image Searches, RSS Feeds, and More 47 Keyboard Shortcuts That Work in All Web Browsers How To Hide Passwords in an Encrypted Drive Even the FBI Can’t Get Into

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  • virtualisation with kvm: export services from guest to the host

    - by ascobol
    Hello, I would like to export some services from the guest os to the host os, via kvm, and by the same way learn some things about networking. I have tried the following commands: In the host (kubuntu 10.4): $ sudo tunctl -u ascobol Set 'tap0' persistent and owned by uid 2401 $ sudo ifconfig tap0 192.168.2.1 netmask 255.255.255.0 broadcast 192.168.2.255 The ifconfig command returns: $ /sbin/ifconfig tap0 Link encap:Ethernet HWaddr 3e:4e:e3:cc:bc:92 inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::3c4e:e3ff:fecc:bc92/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:17 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0 Then I run the virtual machine (ubuntu server 10.4): $ sudo kvm -hda ubuntuserver104.qcow2 -net nic -net tap,name=tap0,script=no (I'm using sudo because without it fails with the following message:) warning: could not configure /dev/net/tun: no virtual network emulation With sudo the virtual machine boots, I just get this message: pci_add_option_rom: failed to find romfile "pxe-rtl8139.bin" In the virtual machine: $ ifconfig eth0 192.168.2.2 netmask 255.255.255.0 broadcast 192.168.2.255 Now if I run: $ ssh 192.168.2.2 I just get a No route to host What is wrong with this setup ? Thanks !

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  • Problems using wondershaper on KVM guest

    - by Daniele Testa
    I am trying to limit bandwidth on one of my KVM guest using Wondershaper. Doing something like this works fine: wondershaper br23 9000 9000 Doing a wget with the setting above gives a download speed of about 1MB/sec like it should. However, it seems this is the highest setting I can use, because setting it to this does not work: wondershaper br23 10000 10000 Doing the same wget with the setting above downloads with full speed, about 70MB/sec in my case. Running a status-check returns the following: qdisc cbq 1: root refcnt 2 rate 10000Kbit (bounded,isolated) prio no-transmit Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 12500 undertime 0 qdisc sfq 10: parent 1:10 limit 127p quantum 1514b divisor 1024 perturb 10sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 qdisc sfq 20: parent 1:20 limit 127p quantum 1514b divisor 1024 perturb 10sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 qdisc sfq 30: parent 1:30 limit 127p quantum 1514b divisor 1024 perturb 10sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 qdisc ingress ffff: parent ffff:fff1 ---------------- Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 class cbq 1: root rate 10000Kbit (bounded,isolated) prio no-transmit Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 12500 undertime 0 class cbq 1:1 parent 1: rate 10000Kbit (bounded,isolated) prio 5 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 12500 undertime 0 class cbq 1:10 parent 1:1 leaf 10: rate 10000Kbit prio 1 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 12500 undertime 0 class cbq 1:20 parent 1:1 leaf 20: rate 9000Kbit prio 2 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 12500 undertime 0 class cbq 1:30 parent 1:1 leaf 30: rate 8000Kbit prio 2 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 borrowed 0 overactions 0 avgidle 12500 undertime 0 What am I doing wrong? Does wondershaper have some kind of upper limit?

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  • Getting macro keys from a razer blackwidow to work on linux

    - by Journeyman Geek
    I picked up a razer blackwidow ultimate that has additional keys meant for macros that are set using a tool that's installed on windows. I'm assuming that these arn't some fancypants joojoo keys and should emit scancodes like any other keys. Firstly is there a standard way to check these scancodes in linux? Secondly how do i set these keys to do things in command line and x based linux setups? My current linux install is xubuntu 10.10, but i'll be switching to kubuntu once i have a few things fixed up. Ideally the answer should be generic and system-wide Things i have tried so far: showkeys from the built in kbd package (in a seperate vt) - macro keys not detected xev - macro keys not detected lsusb and evdev output this ahk script's output suggests the M keys are not outputting standard scancodes Things i need to try snoopy pro + reverse engineering (oh dear) Wireshark - preliminary futzing around seems to indicate no scancodes emitted when what i seem to think is the keyboard is monitored and keys pressed. Might indicate additional keys are a seperate device or need to be initialised somehow. Need to cross reference that with lsusb output from linux, in 3 scenarios - standalone, passed through to a windows VM without the drivers installed, and the same with. LSUSB only detects one device on a standalone linux install It might be useful to check if the mice use the same razer synapse driver , since that means some variation of razercfg might work (not detected. only seems to work for mice) Things i have Have worked out: In a windows system with the driver, the keyboard is seen as a keyboard and a pointing device. And said pointing device uses, in addition to your bog standard mouse drivers.. a driver for something called a razer synapse. Mouse driver seen in linux under evdev and lsusb as well Single Device under OS X apparently, though i have yet to try lsusb equivilent on that Keyboard goes into pulsing backlight mode in OS X upon initialisation with the driver. This should probably indicate that there's some initialisation sequence sent to the keyboard on activation. They are, in fact, fancypants joojoo keys. Extending this question a little I have access to a windows system so if i need to use any tools on that to help answer the question, its fine. I can also try it on systems with and without the config utility. The expected end result is still to make those keys usable on linux however. I also realise this is a very specific family of hardware. I would be willing to test anything that makes sense on a linux system if i have detailed instructions - this should open up the question to people who have linux skills, but no access to this keyboard The minimum end result i require I need these keys detected, and usable in any fashion on any of the current graphical mainstream ubuntu varients

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  • Windows Boot Manager, linking a 'device' to boot linux

    - by TheCompander
    I'm attempting to boot linux on a UEFI-GPT machine with a Windows Boot Manager (WBM). So far I have installed Archlinux (Arch) with Grub. The grubx64.efi is successfully on my windows boot partition and I can see the option to use it in UEFI-BIOS, selecting this loads grub and I'm able to get into Arch fine. I have noticed that in the Windows Boot Manager, selecting from the splash screen, 'Change defaults or choose other options' 'Choose other options' 'Use a device', shows the boot options as in UEFI-BIOS, in my case grub shows as 'Linux'. Selecting 'Linux' reboots the computer and loads grub then Arch. Is there anyway to use this entry for the device 'Linux' to show directly on the WBM splash screen under the entry for Windows 8.1? Ideally i'd like the 'Arch Linux' to link to the 'Linux' device. Guidance with bcdedit appreciated, thanks in advance.

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  • Adeos's role w.r.t Linux

    - by Anisha Kaul
    The event pipeline The fundamental Adeos structure one must keep in mind is the chain of client domains asking for event control. A domain is a kernelbased software component which can ask the Adeos layer to be notified of: · Every incoming external interrupt, or autogenerated virtual interrupt; · Every system call issued by Linux applications, · Other system events triggered by the kernel code (e.g. Linux task switching, signal notification, Linux task exits etc.). From: Life with Adeos: http://www.xenomai.org/documentation/xenomai-2.4/pdf/Life-with-Adeos-rev-B.pdf Question: Adeos is supposed to be between the hardware and the Linux kernel, I can understand about Adeos telling the Linux about hardware interrupts but Why should Adeos know about the "system call" issued by Linux?

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  • Linux: Schedule command to run once after reboot (RunOnce equivalent)

    - by Christopher Parker
    I'd like to schedule a command to run after reboot on a Linux box. I know how to do this so the command consistently runs after every reboot with a @reboot crontab entry, however I only want the command to run once. After it runs, it should be removed from the queue of commands to run. I'm essentially looking for a Linux equivalent to RunOnce in the Windows world. In case it matters: $ uname -a Linux devbox 2.6.27.19-5-default #1 SMP 2009-02-28 04:40:21 +0100 x86_64 x86_64 x86_64 GNU/Linux $ bash --version GNU bash, version 3.2.48(1)-release (x86_64-suse-linux-gnu) Copyright (C) 2007 Free Software Foundation, Inc. $ cat /etc/SuSE-release SUSE Linux Enterprise Server 11 (x86_64) VERSION = 11 PATCHLEVEL = 0 Is there an easy, scriptable way to do this?

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  • Choosing a Linux distribution

    - by Luke Puplett
    Dangerous territory with this question so please try to be impartial and instead focus on what to look for when choosing a Linux distribution. I'm completely new to Linux. I thought it'd never happen but I need to have a Linux box to play with and I have a spare fanless Atom PC (32-bit only). I'll be using the machine as a non-commercial hobby server, the trouble is, I don't even know how to compare Linux distributions and why people pick one over another. If anything, I want to have an easy install from USB stick. My question is: what do you look for when choosing a (free?) Linux distribution for a server? If you can, please explain what sorts of things actually differ between one and another without saying which you think is better, just the facts. The way I see it, Linux as a server is just an SSH console and I find it hard to imagine what could be different between one and another.

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  • Mount linux partition as Windows network share over internet

    - by CptEO
    I have a Linux server running RHEL 6. I have two Windows servers. All servers are connected directly to the web with an external IP, they are not in a local lan. What I would like to achieve is to setup the Linux server so that it offers a single share (the whole partition) that can be mounted as network drive within Windows. I don't want to use any 3rd party software to access the linux server because I want to use the linux server as a backup for Bare Metal Restore. In order to do so, I need to be able to access the linux partition from within the Windows Recovery Enviroment where I cannot install any 3rd party software. The linux server should only be accessible from given IP addresses (e.g. the 2 windows servers). Does anyone know if the setup I would like to have is possible?

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  • Share Files and Folders and Internet between Guest OS and the Host in Hyper-V

    - by Manesh Karunakaran
    For those who are familiar with the VirtualPC, vmWare and VirtualBox environments will be quite irritated to find out that there is no direct way to share files from the Host machine to the Virtualized guest environment. This is a good thing from a CIO perspective because there’s excellent isolation for the virtualized environments this way, but for the developer junkies like us, this is an irritant, especially for those who have nuked their Windows 7 OS and installed Windows Server 2008 R2 for all the the SharePoint friendliness that it offers. Here’s a quick 5 minutes howto on Enabling Shared Folders and Internet Access for the Hyper-V images, for those who are still struggling with this. Step 1: Add a Virtual Network Adapter to your Guest OS For this, shut down the guest machine, go to its settings and add a Virtual Network Adapter as given in the images below     Step 2: Enable Virtual Networking in Hyper-V   Setting this up is very easy. In the Hyper-V Manager, under Actions (right panel), click the Virtual Network Manager. In the Virtual Network Manager in the Create virtual network panel, select Internal and click the Add button.        At this point if you open Control Panel\Network and Internet\Network Connections you will be able to see the new Network Adapter, Now name it to something meaningful other than Network Adapter X. Now you can add this network to each of your virtual machines, but at this point, unless you assign an IP address in each connection, you won't be able to do much.   Step 3: Enable Internet Connection Sharing so that Guest OS’es also can connect to the internet. To enable ICS follow these steps: Click on the network icon in the tray of your host machine and select Network and Sharing Center. From there click Manage network connections. Select the network adapter that you use to access the Internet. Right click it and select Properties. In the properties dialog select the Sharing tab. On this tab check the box that says "Allow other network users..." and then set the Home networking connection to be the network adapter that was created above (now you see why I said to rename it to something useful). Now your virtual machines that have this network connection will automatically get an IP address and will be able to connect to the Internet (provided your internet connection is working). Because each adapter also gets an automatic address you can now share files and folders between your host and your virtual machines which is important since you can't just drag-and-drop files like you can with Virtual PC.   Step 4: Create a Shared Folder in the Host Machine and use it in the Guest machine. Right click on the folder that you want to Share and select ‘Share with\Specific People’ and specify who all can access the share. Open the Guest OS from Hyper V Navigate to Start > Run and type in the Address of the Share (Or Map a Drive to the Share) Bingo! The Share opens!! :)   Now you can share as many files and folders as you want between the host and the guest, and you also have internet access inside the Virtual machines. Hope that helps.   Technorati Tags: Shared folder,Hyper-V,Share Files,Share files and folders between guest and host,Hyper-V Networking,Share Internet Access in Hyper-V,Internet,Files,Shared folders in Hyper-V

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  • VirtualBox guest responds to ping but all ports closed in nmap

    - by jeremyjjbrown
    I want to setup a test database on a vm for development purposes but I cannot connect to the server via the network. I've got Ubuntu 12.04vm installed on 12.04 host in Virtualbox 4.2.4 set to - Bridged network mode - Promiscuous Allow All When I try to ping the virtual guest from any network client I get the expected result. PING 192.168.1.209 (192.168.1.209) 56(84) bytes of data. 64 bytes from 192.168.1.209: icmp_req=1 ttl=64 time=0.427 ms ... Internet access inside the vm is normal But when I nmap it I get nothin! jeremy@bangkok:~$ nmap -sV -p 1-65535 192.168.1.209 Starting Nmap 5.21 ( http://nmap.org ) at 2012-11-15 18:39 CST Nmap scan report for jeremy (192.168.1.209) Host is up (0.0032s latency). All 65535 scanned ports on jeremy (192.168.1.209) are closed Service detection performed. Please report any incorrect results at http://nmap.org/submit/ Nmap done: 1 IP address (1 host up) scanned in 0.88 seconds ufw and iptables on VM... jeremy@jeremy:~$ sudo service ufw stop [sudo] password for jeremy: ufw stop/waiting jeremy@jeremy:~$ sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination I have scanned around and have no reason to believe that my router is blocking internal ports. jeremy@bangkok:~$ nmap -v 192.168.1.2 Starting Nmap 5.21 ( http://nmap.org ) at 2012-11-15 18:44 CST Initiating Ping Scan at 18:44 Scanning 192.168.1.2 [2 ports] Completed Ping Scan at 18:44, 0.00s elapsed (1 total hosts) Initiating Parallel DNS resolution of 1 host. at 18:44 Completed Parallel DNS resolution of 1 host. at 18:44, 0.03s elapsed Initiating Connect Scan at 18:44 Scanning 192.168.1.2 [1000 ports] Discovered open port 445/tcp on 192.168.1.2 Discovered open port 139/tcp on 192.168.1.2 Discovered open port 3306/tcp on 192.168.1.2 Discovered open port 80/tcp on 192.168.1.2 Discovered open port 111/tcp on 192.168.1.2 Discovered open port 53/tcp on 192.168.1.2 Discovered open port 5902/tcp on 192.168.1.2 Discovered open port 8090/tcp on 192.168.1.2 Discovered open port 6881/tcp on 192.168.1.2 Completed Connect Scan at 18:44, 0.02s elapsed (1000 total ports) Nmap scan report for 192.168.1.2 Host is up (0.0017s latency). Not shown: 991 closed ports PORT STATE SERVICE 53/tcp open domain 80/tcp open http 111/tcp open rpcbind 139/tcp open netbios-ssn 445/tcp open microsoft-ds 3306/tcp open mysql 5902/tcp open vnc-2 6881/tcp open bittorrent-tracker 8090/tcp open unknown Read data files from: /usr/share/nmap Nmap done: 1 IP address (1 host up) scanned in 0.08 seconds Answer... Turns out all of the ports were open to the network. I installed open ssh and confirmed it. Then I edited my db conf to listen to external IP's and all was well.

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  • How To Configure Remote Desktop To Hyper-V Guest Virtual Machines

    - by Brian Jackett
    Configuring Remote Desktop (RDP) from a host Hyper-V machine to a guest virtual machine can be tricky, so this post is dedicated to the issues and resolution steps I went through to allow RDP.  Cutting to the point, below are the things to look for followed by some explanation about my scenario if you care to read.  This is not an exhaustive list of what is required, just the items that were causing problems for my particular scenario. Requirements Allow Remote Desktop Connections in guest OS. The network adapter type must allow communication with host machine (e.g. use an “Internal” virtual adapter.) If running Server 2008 R2 on guest, network discovery mode must be turned on. If running Server 2008 R2 on guest, the services supporting network discovery mode must be running: - DNS Client - Function Discovery Resource Publication - SSDP Discovery - UPnP Device Host My Environment     A quick word about my environment.  I am running Windows Server 2008 R2 with Hyper V on my laptop and numerous guest VMs running Windows Server 2003 R2 or Windows Server 2008 R2.  I run a domain controller VM and then 1 or 2 SharePoint servers depending on my work needs.  I’ve found this setup to work well except when it comes to the display window for my VMs. The Issue     Ever since I began running Hyper-V I haven’t been able to RDP to my guest VMs which means the resolution for my connection windows ha been limited to what the native Hyper-V connections allow.  During personal use I can put the resolution up to 1152 x 864, but during presentations I am usually limited to a measly 800 x 600.  That is until today when I decided to fully investigate why I couldn’t connect via RDP.     First a thank you to John Ross (@johnrossjr), Christina Wheeler (@cwheeler76) and Clayton Cobb (@warrtalon) for various suggestions while I was researching tonight.  As it turns out I had not 1, not 2, but 3 items preventing me from using RDP.  Let’s dig into the requirements above. Allow RDP Connection     This item I had previously taken care of, but it bears repeating because by default Windows Server 2008 R2 does not allow RDP connections.  Change the setting from “Don’t allow…” to whichever “Allow connections…” setting suits your needs.  I chose the less secure option as this is just my dev laptop. Network Adapter Type     When I originally configured my VMs I configured each to use 2 network adapters: one using the physical ethernet adapter for internet use and a virtual private adapter for communication between the VMs.  The connection for the ethernet adapter is an "”External” adapter and thus doesn’t connect between the host and guest.  The virtual private adapter allowed communication ONLY between the VMs and not to my host.  There is a third option “Internal” which allows communication between VMs as well as to the host.  After finding out this distinction I promptly created an Internal network adapter and assigned that to my VMs. Turn On Network Discovery     Seems like a pretty common sense thing, but in order to allow remote desktop connections the target computer must able to be found by the source computer (explained here.)  One of the settings that controls if a computer can be found on the network is aptly named Network Discovery.  By default Windows Server 2008 R2 turns Network Discovery off for security purposes.  To enable it open up the Network and Sharing Center.  Click “Change Advanced Sharing Settings” on the left.  On the following screen select “Turn on network discovery” for the currently used profile and click Save Settings.  You may notice though that your selection to turn on network discovery doesn’t save.  If this is the case then you most likely don’t have the supporting services running (as was my case.) Network Discovery Supporting Services     There are a total of 4 services (listed again below) that need to be running before you can turn on network discovery (explained here.)  The below images highlight these services.  In my guest VM I found that I had DNS Client already running while the other 3 were disabled.  I set them all to enabled and started the ones that were stopped.  After this change I returned to the Sharing settings screen and found that Network Discovery was turned on.  I’m not sure whether this was picking up my attempt to turn it on previously or if starting those services turned it on.  Either way the end result was a success. - DNS Client - Function Discovery Resource Publication - SSDP Discovery - UPnP Device Host Before and After Results     The first image is the smaller square shaped viewing window used by the Hyper-V native connection.  The second is the full-screen RDP connection in all its widescreen glory. Conclusion     Over the past few months I’ve found Hyper-V to be very useful for virtualizing my development environments, but I’ve also had a steep learning curve to get various items configured just right.  Allowing RDP connections to guest VMs was one area that I hadn’t been able to get right for the longest time.  Now that I resolved these issues I hope that others can avoid the pitfalls that I ran into.  If you know of any other items I left off feel free to let me know.        -Frog Out   Links Turning on Network Discovery http://sqlblog.com/blogs/john_paul_cook/archive/2009/08/15/remote-desktop-connection-on-windows-server-2008-r2.aspx Services required for Network Discovery http://social.technet.microsoft.com/Forums/en-US/winservergen/thread/2e1fea01-3f2b-4c46-a631-a8db34ed4f84

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