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• Is it possible to add tcp autotuning to windows xp?

  - by Caspin

  I have a network application that needs to send messages at 60 times a second. The messages are usually 300-400 bytes, but can be as large as 1500. The default setting for SO_SNDBUF is too small and limits the number of message that can be sent if the network latency is anything greater then 100ms. The naive solution is to just bump the SO_SNDBUF size to to something large. However, depending on the latency and the packet size that could be anywhere from 64K to 8MB. One of Vista's new features is TCP autotuning. Autotuning monitors the tcp connection and dynamically adjust the buffer sizes to allow for optimal communication. I would like to use auto tuning on our windows xp machine so I don't need to guess what my buffers sizes should be. Is there a way to install either a microsoft or 3rd party tcp autotuner on windows xp?

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• Is it possible to add tcp autotuning to windows xp?

  - by Caspin

  I have a network application that needs to send messages at 60 times a second. The messages are usually 300-400 bytes, but can be as large as 1500. The default setting for SO_SNDBUF is too small and limits the number of message that can be sent if the network latency is anything greater then 100ms. The naive solution is to just bump the SO_SNDBUF size to to something large. However, depending on the latency and the packet size that could be anywhere from 64K to 8MB. One of Vista's new features is TCP autotuning. Autotuning monitors the tcp connection and dynamically adjust the buffer sizes to allow for optimal communication. I would like to use auto tuning on our windows xp machine so I don't need to guess what my buffers sizes should be. Is there a way to install either a microsoft or 3rd party tcp autotuner on windows xp?

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• Home Media Streaming Server

  - by sharjeel

  I'm looking for a Home Media Server which can stream videos to various devices including iPhone, iPad, Windows Machines, Android etc. I wouldn't want to install any client on any device; a web interface will be preferred. Also, it should be able to read videos of as many formats as possible and should stream by transcoding the resolution and format according to device's specifications. I have a fairly powerful machine on which I'm free to install Windows 7 or Linux. The streaming will be done over a g/n WiFi router or Ethernet locally. What is the suggested solution in my case?

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• Windows Randomly Stop Accepting Input from Bluetooth Keyboard

  - by dragonmantank

  I've got a laptop running Ubuntu 11.10 with the most recent updates and an Apple Wireless Keyboard that syncs via bluetooth. The Ubuntu box is also a Synergy server, using QuickSynergy to run Synergy. I'm using xmodmap to swap the option and command keys, but nothing else. Throughout the day, windows that are long running will just stop accepting input. For example, I leave gnome-terminal up and running almost 24 hours a day. If it sits for a while, it just stops accepting input. It doesn't matter if I'm ssh'd into another machine or sitting on a local tty session, it just stops accepting input. If I open a new tab or window, those work fine. The 'broken' tabs stay broken. I'm also running Turpial (a Twitter client) which will do that same thing. I tend to use the arrow keys to navigate, and it just stops accepting input. Closing it and reopening it causes it to work fine. I don't seem to have the problem in Chrome, but I tend to open up new tabs when I go somewhere instead of using existing tabs. I've updated all the packages, rebooted, and the only thing that seems to cure it is if I type on the built-in keyboard, the window will start to accept text from the bluetooth keyboard (until it stops again). I don't think the keyboard is disassociating from the laptop because it can happen while I'm using the keyboard, it seems more linked with windows that I sit for a long time. As an example, I'm typing in Chrome with the bluetooth keyboard but I have a terminal window that won't accept input.

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• Can't access files on external drive after reformatting Macbook Pro

  - by Peter Wells

  I recently had to reformat my Macbook Pro, and imported my account and settings from Time Machine via the Migration Assistant. Everything on the Mac itself is fine, but now I don't have permission to access almost everything on my external drive. A number of folders have the little red 'no access' sign on them and I can't rename or move anything. Looking at the info for these files, it appears that access rights were attached only to my old user account. Is there some way to reassign these files and folders to my new user account? Thanks.

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• Is there a way to sort my windows within a screen session?

  - by jv1975

  I use screen and have ssh sessions open to a number of different machines from within my screen session. I'd like to keep them in order, for obvious reasons. Often I'll have to connect to a new machine which alphabetically/numerically should fit in between two existing windows. I can't find any way to reorder the windows other than with the "number" command, which swaps my current window with that at the number I specified. So adding a new window to the 15 I already have and then sticking it at position 2, while keeping all the other windows in order as well is cumbersome, to say the least, requiring swaps for all windows past #2. Is there anyway to sort the windows alphabetically? Or a way to "shift" all windows after a certain point up one spot? Or any other suggestions to insert a new window at an arbitrary point while still maintaining the order of all other windows? Thanks!

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• OS2/Warp - Remotely Stop and Restart a Program

  - by Justin S

  Our current phone system runs off of a legacy OS2/Warp box. Periodically we have to log into the machine and restart OS2RSD.exe and then start it again and the phone system starts working again. The problem is we have to physically get in front of the box and use the GUI to stop and restart the process. Is it possibly to remotely run a script to kill OS2RSD.exe if its running and then start it again? I have been unable to figure this out on my own. The OS is OS2/Warp Version 3 if that helps.

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• Unknown monitor in Lenovo laptop

  - by kumar

  I have set of two Lenovo laptops on which Fedora core 13 is installed. On one machine, the monitor is detected properly such that it is possible to connect another monitor. But on another laptop, the monitor is shown as unknown monitor. I tried to fix it by reinstalling xorg-x11-drv-intel.i686. But the problem remains same (unknown monitor) and it is not possible to connect another monitor with this setting. Laptop model: Lenovo G460. Graphics card: Intel Graphics Media accelerator HD. Thanks!

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• Why do Windows 7 & 8 have different default behaviour when trying to modify contents of protected folder

  - by Ben

  Here's the situation: I have a Windows 7 PC and a Windows 8 PC and I'm logged in as the same domain user on both machines. My domain user is in the local Administrator group on both. When I run cmd.exe on each machine and then attempt to do this (also on both machines) mkdir "c:\Program Files\cheese" the Windows 8 PC gives an "Access Denied" error, while it works fine on the Windows 7 PC. I understand that C:\Program Files is a protected folder and I'm not interested in a debate on the morals of writing to such a folder directly. But I am interested in understanding what exactly has changed in Windows 8 to cause this. I don't seem to be able to find anything that acknowledges or explains this change in behaviour in Windows 8.

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• how can I pass an environment variable through an ssh command?

  - by Ross Rogers

  How can I pass a value into an ssh command, such that the environment that is started on the host machine starts with a certain environment variable set to my choosing? EDIT: The goal is to pass the current kde desktop ( from dcop kwin KWinInterface currentDesktop ) to the new shell created so that I can pass back an nfs locations to my JEdit instance on the original server which is unique for each KDE desktop. ( Using a mechanism like emacsserver/emacsclient) The reason multiples ssh instances can be in flight at one time is because when I'm setting up my environment, I'm opening a bunch of different ssh instances to different machines.

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• Getting "Unable to find a medium containing a live file system" when installing 10.10

  - by Krastin Konstantinov

  I got this error while trying to install ubuntu 10.10 from a bootable USB stick on to Sony Vaio P series laptop. The disk boots into the language and installation type screen. After that it goes through the splash and pulls up this error: BusyBox v1.13.3 (Ubuntu 1:1.13.3-ubuntu11) built in shell (ash) Enter 'help' for a list of built-in commands. (initramfs) Unable to find a medium containing a live file system After getting this error the installation fails to start. I have used the same USB stick on some other laptops and the installation started as usual. Any help will be appreciated. My installation is i386 and my machine is Vaio P VGN-P610. I've tried every possible thing: Bios: [enable boot external] Boot order: [external] [hard drive] [network boot] Tried 2 different USB drives Tried 2 different external CD drives Tried 6 different downloads of both the desktop and netbook remix. All downloads were checked with MD5SUM. Ubuntu Desktop 9.10 installs properly in every version and from every source. Getting reaaaally frustrated.

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• Run program as admin without entering credentials? (Automatic Win7 elevation)

  - by Sam

  I'm working on my systems without admin rights, but I'd like to start sysinternals process explorer as full admin to have some debug access on my machine. Right now I run procexp.exe with parameter /e, which prompts me for admin credentials. Of course I could use runas, but for this I would need to put my admin passwort in clear text in the corresponding batch file, which is something I don't like to do. Is there a way to tell windows that this one procexp.exe is allowed to run as admin without needing to enter the credentials?

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• Optimal Configuration for five 300 GB 15K SAS Drives

  - by Bob

  I recently acquired an HP Z800 workstation that has five 300 GB 15K SAS Drives. This system will be dedicated to running multiple virtual machines under VMware Workstation (Note: I'm not using ESXi because I do plan to use the system for other purposes.). For the host OS, I plan to install RHEL 5. My number one concern is guest performance. For example, should I create a RAID 10 array for the OS and virtual machine storage with four of the drives and reserve the 5th? Or, is there a solution that will provide better performance?

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• Windows 7: Server disappearing from Network window

  - by David Veeneman

  I am running a small (three computer) network on a Windows Server 2003 domain. All of the computers were just upgraded to Windows 7. Since the upgrade, the icon for the domain server periodically disappears from the Network window on all three computers. It doesn't happen at the same time on all computers--the icon typically disappears from one machine, but not the others. And it's not always the same computer. The network connection is still there--I can type \\myserver and get to the network shares. It's simply the icon that's disappearing. Has this happened to anyone else? Any suggestions for a fix? Thanks in advance.

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• Ubuntu Slow - What architecture does the Windows Installer install?

  - by Benjamin Yep

  I feel absolutely limited by using Windows, and I need to switch to a Unix environment. I once installed Red Hat on my lappie (screen + external monitor setup; 4GB ram; x64; runs fast) and it worked fine, but I saw that the computer cluster that is the birthplace of my unix knowledge switched to Ubuntu, so naturally I follow. To the point. When I installed Ubuntu onto my machine via the Windows Installer, it ran quite slow. Opening Firefox takes about 8-9 seconds, it freezes up often, unable to handle its own background processes. I saw in a thread that, perhaps, it is running slow because the Windows Installer is installing an x64 version. Of course, my computer has had no performance issues in the past(except that time with the trojans but you know, know one is perfect ;) ) Anyways, I uninstalled Ubuntu, freeing up the max allocated memory it took up, and continue to be sad, trapped in my MS world with only a buggy Cygwin, any assistance is greatly appreciated! :) Thanks ~Ben

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• Is there anyway to stop Windows 8 from restarting for an update?

  - by William Hilsum

  My Windows 8 machine is going to restart shortly... I have tried a few techniques such as shutdown /a which is not having much luck. Short of pausing the Windows Update service, is there anyway to stop this restart from happening? ---update--- Looks like the "restart" is all talk and no action! The time has gone and I am presented with this: So, it goes along with the top answer here (which I shall shortly accept) --- update again--- It did reset!!! My battery went critical and it turned itself off, I turned it back on (out of suspend) when it was plugged in, I logged in and the first thing it did was automatically restart - closing my open tabs in Chrome :( Oh well...

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• How do I revert back to official Linksys firmware from dd-wrt on WRT56G2 v1?

  - by Chris Moore

  I've been having trouble with dd-wrt on my Linksys WRT56G2 v1 router and want to go back to the stock Linksys firmware for it. The router has only 2MB of flash memory, and so I'm running the 'micro' version of dd-wrt. My question is what is the best way to do that? I could use the http://router/Upgrade.asp dd-wrt "firmware upgrade" web interface to do it, in which case there's a dropdown menu choice for "After flashing, reset to": "don't reset" or "reset to default settings". Which should I pick? Some people say that I should use a program called tftp.exe instead. I can probably gain access to a Windows machine if this is necessary. Which of these is the way to proceed? I don't want to brick the router if at all possible! Note: I used the 'wrt54g' tag because I wasn't allowed to create a 'wrt54g2' tag due my low rep here.

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• MAMP PHP5.3 and 5.4

  - by musoNic80

  I've just downloaded the latest version of MAMP (2.1) but have run into a few issues. I'm developing using Symfony2 which requires php5.3 minimum. It also requires a php accelerator, ideally APC. So, I set MAMP (I'm not using MAMP PRO) to use php 5.4. Problem solved, I thought. Apparently not though. It turns out MAMP have decided not to support APC (or any accelerator as far as I can see) with their 5.4 version apparently due to it being buggy (really?!?!). Ok, so I'll just use 5.3 instead. Apparently not. It turns out that although MAMP has installed 5.3 on my machine I can't select it in the preference pane. I get a choice of 5.2 or 5.4! Is there a workaround for this?

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• Configure IIS 7 Reverse Proxy to connect to TeamCity Tomcat

  - by Cynicszm

  We have an IIS 7 webserver configured and would like to create a reverse proxy for a TeamCity installation using Tomcat on the same machine. The IIS server site is https://somesite and I would like the TeamCity to appear as https://somesite/teamcity redirecting to http://localhost:portnumber. I have installed the IIS URL Rewrite extension and the Application Request Routing to try and setup a reverse proxy but can't get it working. The closest answer I found is an old StackOverflow question: http://stackoverflow.com/questions/331755/how-do-i-setup-teamcity-for-public-access-over-https which unfortunately doesn't have any working example. I've searched a quite a bit but can't seem to find a relevant example. Any help is appreciated!

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• Upgrade went wrong, laptop essentially 'bricked'

  - by hexagonheat

  I have an old netbook I was trying to upgrade from 10.04 to 10.10. Ubuntu was in the process of upgrading when everything completely froze. I left it sit for an hour but it would not respond to anything. So I powered down the machine and it didn't have the necessary files to run Ubuntu. I went to the terminal and it told me to put in some command that I can not remember to 'rebuild' something. That takes me to now, when I turn on the laptop it comes up with a screen "GNU GRUB version 1.98+20100804-5ubuntu3.3" and has a bunch of options such as: 1. Ubuntu, with Linux 2.6.35-32-generic 2. Ubuntu, with Linux 2.6.35-32-generic (recover mode) etc. (there are like 15 of these with different numbers after 2.6.35 and the word 'generic'. It doesn't seem to matter what I pick, it will go to the "Ubuntu" loading screen with the colored dots but then every time it will freeze and I have to reboot to the same thing. I can't seem to get a terminal prompt anywhere either. Any ideas? I can't think of what to do :(

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• "Turn Windows Features on or off" when installing .NET 3.5 SP1?

  - by user1413

  I am trying to install a program on my Win7 machine and it says that I need to have .NET 2.0 or later installed. Since Win7 comes with .NET pre-installed, I called support and they told me to just re-install .NET since my .NET install is probably corrupted. The program I am trying to install is SNGWiz (http://www.sngwiz.com/). I do not think its installer is borked. However, when I install .NET 3.5 SP1 using the download from the Microsoft .NET web site, I get the following error: "You must use 'Turn Windows features on or off' in the Control Panel to install or configure Microsoft .NET Framework 3.5 SP1." I have gone to the Windows Features on/off panel and have turned 3.5 both on and off and have tried to re-install .NET 3.5 SP1 under both situations. But it has failed with the same error. What to do?

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• nginx proxy pass redirect through load balancer

  - by Brian

  I have several backend webservers that are load-balanced using LVS. These machines have only internal non-routable IPs on them. The load-balancer is the only machine with an external IP. This setup works great. I would like to add another webserver for image serving, but it will not be part of the load-balanced pool. Is it possible to proxy pass from the load-balanced web servers to the image server and have the response redirected to the client? Client--external LB--internal web server--internal image server I've gotten proxy pass working when I remove the LB from the equation, but no luck when trying to use it.

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• CentOS 5 - Unable to resolve addresses for NFS mounts during boot

  - by sagi

  I have a few servers running CentOS 5.3, and am trying to get 2 NFS mount-points to mount automatically on boot. I added 2 lines similar to the following to fstab: server1:/path1 /path1 nfs soft 0 0 server2:/path2 /path2 nfs soft 0 0 When I run 'mount -a' manually, the mount points are properly mounted as expected. However, when I reboot the machine, only /path2 is mounted. For /path1 I get the following error: mount: can't get address for server1 It obviously looks like a DNS issue, but the record is properly configured in all the DNS servers and is mounted properly if I re-try the mount after the reboot is completed. I could properly fix this by using IP address instead of hostnames in /etc/fstab or adding server1 to /etc/hosts but I would rather not do that. What might be the reason for failing to resolve this specific address during boot time? Why the problem is only with the 1st mount point and the 2nd is properly mounted despite having identical configuration?

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• Fedora Core 11 won't boot without a monitor

  - by feihtthief

  I have a P4 system that I installed Fedora 11 on. It will not boot without a monitor attached. The monitor can be off (not even have power plugged in), but must be attached. Without a monitor the hard disk thrashes around a bit like it's starting up services, but does not get to the point where I can ssh into the box. I have set the default runlevel to 3 and removed the rhgb entry from grub. Any suggestions welcome. Edit: I have already set the run-level to 3. The machine boots up fine with the monitor plugged in to the point where I can SSH into it. as soon as i unplug the monitor and reboot, it will not boot to that point.

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• DoubleCommand Non-Functional on 10.6.3.

  - by Tim Visher

  I have a 1st or 2nd generation MacBook running 10.6.3. I want to remap my enter key to Ctrl and my right option key to enter (Emacs… yeah) and DoubleCommand seems to be precisely what the doctor ordered. Unfortunately, after having installed the latest version, it seems to be doing absolutely nothing. The correct settings are saved and active, but none of the remapping is taking effect. Are there any known issues with other OS X plug-ins (I run pretty heavily modified) or extensions that I should be aware of? What could the issue be? I initially tried to set only the User settings and then logged out and logged back in but nothing happened. I then tried saving them to System as well and logged out and in and nothing. Then I restarted the machine… twice… and nothing happened. Thanks in advance!

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