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• Can we configure windows 2008 DHCP server to not ignore the broadcast falg of DHCP requests?

  - by Mathieu Pagé

  We have a Cisco WAP4410N access point that does not relay broadcast packets from the wired network to the wireless clients when the network is secured by WPA2. This cause problem with Windows server's DHCP server that respond to DHCP request by broadcasting it's OFFER instead of Unicasting it like it's asked by Windows (and Android and iOS) clients. When we had a Windows 2003 server we configured the server not to ignore the broadcast flag (following these instructions) and it solved the problem. Now we upgraded our servers to Windows 2008 servers and the problem is back. Unfortunately, it seems Windows server 2008 ignore the IgnoreBroadcastFlag parameter. Is there any other way to make sure that Windows Server 2008 respond to DHCP requests using Unicast instead of broadcast? mp

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• Ubuntu keyboard detection from bash script

  - by Ryan Brubaker

  Excuse my ignorance of linux OS/hardware issues...I'm just a programmer :) I have an application that calls out to some bash scripts to launch external applications, in this case Firefox. The application runs on a kiosk with touch screen capability. When launching Firefox, I also launch a virtual keyboard application that allows the user to have keyboard input. However, the kiosk also has both PS/2 and USB slots that would allow a user to plug-in a keyboard. If a keyboard were plugged in, it would be nice if I didn't have to launch the virtual keyboard and provide more screen space for the Firefox window. Is there a way for me to detect if a keyboard is plugged in from the bash script? Would it show up in /dev, and if so, would it show up at a consistent location? Would it make a difference if the user used a PS/2 or USB keyboard? Thanks!

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• Disable linux read and write file cache on partition

  - by complistic

  How do i disable the linux file cache on a xfs partition (both read an write). We have a xfs partition over a hardware RAID that stores our RAW HD Video. Most of the shoots are 50-300gb each so the linux cache has a hit-rate of 0.001%. I have tryed the sync option but it still fills up the cache when copinging the files. ( about 30x over per shoot :P ) /etc/fstab: /dev/sdb1 /video xfs sync,noatime,nodiratime,logbufs=8 0 1 Im running debian lenny if it helps.

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• kernel panic with exitcode=0x00000004 and no call trace

  - by litmusconfig

  A bit of background first - I'm trying to configure a MicroBlaze Linux (big-endian version) system on a Xilinx ML506 eval board. The goal is to use the second partition of a CompactFlash card attached to the Xilinx SystemACE controller. So far, root in initramfs works and after boot, I can mount and use said partition, no problem. But if I try to use it right from the getgo with the "root=/dev/xsa2" kernel command line parameter, the system hangs with [...] Freeing unused kernel memory: 143k freed Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004 And that's it - no regdump, no call trace, no further nothing from the serial console, even though kernel has been configured with debugging enabled. Now, I'm pretty new at this, so is there something else I should be doing to see something more informative from the kernel?

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• Filter rule for SMS / text messages in exchange active sync (SMS sync)

  - by kynan

  Exchange server 2010 introduces SMS Sync (via exchange active sync), which works fine with my android device and the Samsung email app. However, all text messages are synced to my exchange inbox, which is a pain. I'd like to have them filtered to a specific folder. So far, I haven't figured out a useful filter rule for achieving that, since there seems to be no header indicating it's a text message. Has anyone managed to do that? Note that I'm not using Outlook as an email client, so I'm specifically looking for a server-side rule.

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• Cache Refresh in Chrome

  - by gAMBOOKa

  I dunno what exactly it's called, by cache refresh I mean, refresh the page after clearing its cache. I don't want to clear the entire browser cache. I prefer Chrome's Dev panel against firebug... don't ask me why. But I can't seem to cache refresh my pages. In FF, I know it to be Shift+Refresh. In chrome, I've tried Ctrl+R, Ctrl+Refresh, Alt+Refresh, Shift+Refresh but none of them work. EDIT: I got a Notable Question Badge for the lamest question I've ever asked. FML.

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• Installing Xen 4.0.1 from Source on Ubuntu 10.10

  - by markus

  I'm trying to install Xen 4.0.1 from Source on Ubuntu 10.10 Server Edition. I started with a clean machine and followed the instructions from https://help.ubuntu.com/community/Xen. So I installed the packages mentioned there with: sudo apt-get install gettext bin86 bcc libc6-dev-i386 iasl texinfo git When making the source with make world I get this error: + git clone -o xen -n git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git linux-2.6-pvops.git.tmp Initialized empty Git repository in /home/homer/xen/linux-2.6-pvops.git.tmp/.git/ remote: Counting objects: 1855434, done. remote: Compressing objects: 100% (291939/291939), done. Receiving objects: 100% (1855434/1855434), 368.49 MiB | 11.00 MiB/s, done. remote: Total 1855434 (delta 1553214), reused 1847760 (delta 1546656) Resolving deltas: 100% (1553214/1553214), done. + cd linux-2.6-pvops.git.tmp + git checkout -b xen/stable-2.6.32.x xen/xen/stable-2.6.32.x fatal: git checkout: branch xen/stable-2.6.32.x already exists make[3]: *** [linux-2.6-pvops.git/.valid-src] Error 128 Does anybody have an idea what i can do?

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• SQL 2008 Database tuning advisor won’t start

  - by Andrew Hancox

  For some reason I can't get DTA to connect to my development machine. It connects to a remote DB just fine but when I point it to my dev machine I get an error saying: Failed to initialize MSDB database for tuning (exit code: -1073741819). I'm pretty sure it's not a permissions issue since I've used profiler to capture what it's doing and all of the commands it's run so far look fine and are being run under my account which is associated with the sysadmin role, when I run them in sql management studio they go through fine. I'm pretty convinced that the problem is related to creating the objects in MSDB that are used by DTA but I tried creating these manually (I found scripts on the web) and it just seems to push the problem along the line slightly. I'm going out of my mind - have even tried reinstalling SQL but that's not fixed it. I'm using SQL 2008 with SP1 (10.0.2531) on windows server 2008 (patched up to date). SAVE ME!!!!!

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• Files missing after copying from one sdcard to another using Ubuntu 12.04

  - by Abhi Kandoi

  I have two Kingston sdcards 8GB and 32GB. The 8GB for HTC Sensation and 32GB for my Tablet (Chinese). I soon ran out of space on my phone and decided to swap the data between the sdcards. I copied the data of 32GB sdcard to my PC(with Ubuntu 12.04) deleted everything on the 32GB sdcard and copied data from the 8GB sdcard to the other sdcard. At last I copied the data from my PC to the 8GB sdcard(before this I deleted everything that was on it before). Now the problem is that the 8GB sdcard has the data exactly the same, but the 32GB sdcard has some missing data. All my photos(not copied or posted on Facebook) and Songs are lost. Please help as to what I can do to get my data back? I have Android Revolution HD (ICS 4.0.3) on my rooted HTC Sensation (India). I suspect it has something to do with my data loss.

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• Can't create VM with virt-install on Debian wheezy

  - by chrismacp

  Cant find any answers anywhere so here goes. I am trying to CREATE a new virtual machine using the virt-install command from a console on a Debian wheezy install. I keep getting the following output: Starting install... ERROR internal error process exited while connecting to monitor: char device redirected to /dev/pts/1 inet_listen_opts: bind(ipv4,127.0.0.1,5951): Cannot assign requested address inet_listen_opts: FAILED I assumed that the port (5951 in this case) was being used judging by the error message and other sites I visited for an answer, but the same error occurs whatever number I use for the port. I cant see that port being listened upon in netstat either. Anyone have any ideas what may be wrong?

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• procmail issue - splitting delivery of one address based on destination domain

  - by warren

  I use procmail to handle some serverside mail processing. I am trying to setup one email address on a server that support multiple domains (in the example below, domain.net and domain.com). I want mail sent to [email protected] to go to bob and mail sent to [email protected] to go to sara. VERBOSE=off LOGFILE=/dev/null :0 * .domain.net bob :0 * .domain.com sara The above recipe seems to work quite well in that it catches incoming mail to domain.net and forwards it to bob. However, instead of forwarding mail to domain.com to sara, it creates a file in /home/user called sara. What am I doing wrong on this?

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• Procmail lock failures and errors while writing

  - by user58292

  I'm setting up a mail server on an embedded linux system. When sending mail to a local user I get the following error from procmail: procmail: Lock failure on "/home/mail/ktos/.mailspool.lock" procmail: Error while writing to "/home/mail/ktos/.mailspool" procmail: Error while writing to "/var/spool/mail/ktos" From root@waben Wed Dec 15 10:00:40 2010 Folder: **Bounced** 0 procmail: Lock failure on "/root/.mailspool.lock" procmail: Error while writing to "/root/.mailspool" From MAILER-DAEMON Wed Dec 15 10:00:41 2010 Subject: Returned mail: see transcript for details Folder: /var/spool/mail/root 1732 And the mail goes to /var/spool/mail/root. This is my /etc/procmailrc: PATH=/usr/bin:/usr/local/bin MAILDIR=$HOME/.mailspool DEFAULT=$HOME/.mailspool LOGFILE=/dev/pts/0 SHELL=/bin/sh What could be the problem? I'm still pretty green with all the sendmail and procmail stuff as I'm primarily a developer.

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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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• Using a cell phone as a PC remote control

  - by Mahmoud Hossam

  I have a sony ericsson phone that can control any PC using bluetooth, as long as it has permission to do so, of course. It doesn't require any server software of any kind, it just works out of the box with any PC (or mac) that is bluetooth enabled. Is there any program I could use that has the same functionality? I don't want to install anything on the PC, I just want to be able to use the program installed on the phone. I prefer Java ME/Android/Symbian apps, I don't have an iPhone.

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• Create firewall "profiles" for Windows 7

  - by Samantha

  Is there any way to configure a couple of firewall profiles in Windows 7? As I use mobile broadband on when traveling, I don't want virus scanner/windows updates etc running and chewing up my mobile data allocation. So would love to find a way to block everything except email ports and perhaps http. The kicker though is that when I'm back in the office, I want to just click a button to get my original firewall settings back. In the office I use WiFi and on the road tether to my android phone, also via WiFi, so can't restrict via network interface. Any ideas?

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• Keyboard doesn't work after upgrade to Debian Wheezy

  - by mikhail

  After upgrade from lenny to wheezy keyboard and mouse don't work in X (keyboard available before it starts). I looked over internet about this issue and found some solutions: remove xorg.conf (http://forums.debian.net/viewtopic.php?f=7&t=62880) update udev and base-files (http://forums.debian.net/viewtopic.php?f=6&t=64927&p=376136#p376136) remove /run directory (http://forums.debian.net/viewtopic.php?f=6&t=64927&p=376136#p376136) reintall xserver and xorg But, nothing helped me :( Logs of X-server haven't got any messages about keyboard or mouse errors. Below you can see configuration of my system: krestyaninov@xxx# uname -a Linux xxx 3.0.0-1-686-pae #1 SMP Sat Aug 27 16:41:03 UTC 2011 i686 GNU/Linux krestyaninov@xxx# dpkg -l |grep udev ii libgudev-1.0-0 172-1 GObject-based wrapper library for libudev ii libudev0 172-1 libudev shared library ii udev 172-1 /dev/ and hotplug management daemon krestyaninov@xxx# dpkg -l |grep base-files ii base-files 6.5 Debian base system miscellaneous files krestyaninov@xxx# dpkg -l |grep xorg ii xorg 1:7.6+8 X.Org X Window System ... ii xserver-xorg 1:7.6+8 X.Org X server

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• Windows with putty via USB serial cable to Linux serial port - output ok, input isn't

  - by Aharon Robbins

  I am trying to get two way serial communications going between a Windows XP system and a Linux system (RHEL 5). I have /sbin/agetty -L 9600 ttyS0 in /etc/inittab. I am using a generic USB to serial adaptor on Windows (Unitek) and a null modem cable. I have putty configured for 9600 baud, 8 bits, no parity, one stop bit, no flow control. I get the login prompt from agetty in the putty window but input does not work; I see weird characters in the putty screen. I can echo output into the device from windows and see it, but cat < /dev/ttyS0 just prints out weird characters from what I type. Any and all suggestions will be welcome. Thanks!

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• Error: Failed to generate a user instance of SQL Server (again)

  - by Richard77

  Hello, I'm using: Vista SP2 Visual Studio 2010 professional edition SQL Server 2008 Express R2 Dev Server (Cassini) This question has been asked several times. Unfortunately, I didn't find yet an answer that exactly appropriate for me, so it's not possible to apply the solutions I find on the web. I find solutions for Win XP, 7, 2003, sql server 2005. But not for the above combination. I just don't why this problem started a couple days ago. I removed sql server and added it again, but no good result. Either an answer to the question or links to resources will be helpful. Thanks for helping.

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• How to install mod_wsgi 3.1 on Ubuntu 9.10

  - by pthulin

  I have a Python 3 web app so mod_wsgi < 3.1 doesn't cut it for me. However, on my Ubuntu 9.10 installation there doesn't seem to be a package for mod_wsgi 3.1. Is there an alternative repository that has a package for mod_wsgi 3.1? There's a new Ubuntu release not so long from now, will it contain mod_wsgi 3.1? Some other distro ready with mod_wsgi 3.1 to recommend? Maybe my best bet is to compile it myself? From a quick google it looks like I only need the python and apache dev packages installed. Thanks!

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• How to configure Linux to act as a Bluetooth RFCOMM SPP server?

  - by regulatre

  I'm writing a phone app for Android that connects to a bluetooth RFCOMM device in my car. My phone app talks AT commands with it. For development work, I often need to communicate with the device to try different commands and things. My neighbors are starting to think I'm weird because I sit in my car for hours on end with my laptop screen shining on my face, typing away like a script kiddie. I'd much rather configure one of my many Linux servers to act as a bluetooth RFCOMM device and allow me to connect to it (indoors, while I sit on my couch). I imagine I have to start with something like sdptool add SP But then what? I'm perfectly happy writing a perl app to handle the I/O, but I just don't know how to make the bluez stack accept connections and subsequently pipe that stream to a perl app.

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• Supplementary Developer Laptop

  - by David Smith

  I'm looking to buy a laptop with the following specs for a developer. The goal will be to have a development machine supplementing the devs desktop. During work hours the dev will be on a beefy desktop. For working while on the go: trains, client sites, code camps, it would be nice to have a machine which can run Visual Studio 2008 without needing to remote desktop into their primary machine. What do you think is the lowest cost laptop meeting this need? Here are the specs I have in mind: SSD drive 64GB-doesn't need to be huge, most data is stored on servers. Will need to fit Windows 7, IIS, SQL Server, and Visual Studio 2010. RAM-3GB processor =Pentium Core 2 duo Screen size = 14 inches. OS doesn't matter. It will be paved with Windows 7 Ultimate optical drive omitted would be a plus. weight and battery life aren't so important because the machine will be plugged in almost all the time.

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• How to enable "Sleep" for Windows 2012 server

  - by Ramesh

  I recently installed Windows Server 2012. This will serve as the dev-instance for our engineers and will be accessed in multiple time zones. I therefore plan to run this 24x7 but want to conserve energy by going to sleep mode when not in use & enable Wake-On-Magic-Packet. Based on the previous post it appears that there is no option to sleep Win Server 2012 with Hyper-V. Since I don't care much about virtualization now, I uninstalled Hyper-V. In addition to this, I have done the following 1) Ran powercfg -a. Don't find sleep. 2) Added [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\hvboot] "Start"=dword:00000003 to try gaining sleep - no luck! 3) Only see Shutdown and Restart in power options. Please help me sleep and save the planet :-) Thanks, Ramesh

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• Ubuntu mount hard drive confusing

  - by Fresheyeball

  I'm new to linux and have a home server set up running ubuntu. In the ui its very easy to mount my additional internal harddrives. I just double click on them. Since I have made this server headless, I now need to mount via the command line. How can I replicate the very simple double click gui behavior? So far all the information I've found is very complex. Ubuntu auto generated folders for each hd in under /media and I can see the harddrives under /dev but have no idea which is which as the hardware is identical between them. I also don't know how they are formated. Thanks in advance for any advice you have.

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• Stop Zabbix notification for nodes under zabbix-proxy when proxy service is down

  - by A_01

  I have a zabbix-proxy and 12 nodes in that proxy. Right now whenever proxy service goes down. It send out of reach mail for all the 12 nodes. I want to send mail only for the zabbix proxy not for the nodes under that proxy Updated: Now I am trying to have a single trigger in which I want to check both the conditions like 1-check zabbix-host is not accessble from past x minutes. 2-check the host is not giving any data to the proxy(Host is down). Not the trigger should start shouting onle when we have condition in which proxy is running and node is down. I tried the below but its not working for me. Can some please help me out in this ({ip-10-4-1-17.ec2.internal:agent.ping.nodata(2m)}=1) & ({ip-10-4-1- 17.ec2.internal:zabbix[proxy,zabbixproxy.dev-test.com,lastaccess].fu??zzytime(120)}=1)

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• How to securely generate memorable passwords?

  - by Tim

  Whenever I need new passwords I use some tools to generate those, preferable memorable passwords, but I've been wondering how secure this might actually be. Using The xkcd random number generator is probably pretty bad, cat /dev/random is probably pretty good, but generating memorable passwords seems a bit more tricky. Whenever a program generates a memorable password, it only uses a subset of the total password space available, and it is not clear to me how big this space is. Of course a long password should help in this case, but if the `memorable' part of the program is too predictable, your passwords are not very good in the end. TL;DR: how secure are memorable password generators, given the fact that `memorable' passwords are a subset of total password space? Some tools I know of: pwgen -- seems ok, but passwords are not too memorable Mac Password Assistant - generates memorable passwords but it is unclear to me how this works.

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