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• how to resolve all externally unresolved DNS queries ?

  - by red eyes dev

  I am using PowerDns on a Linux box (Debian 6). I would like to set up the powerdns server to resolve all externally unresolved DNS queries to a given, internal host. Is this possible? How is it done? I think it's necessary to use pdns-recursor, but my configuration file doesn't works ! I use mysql for backend. I add manually google.com and it's works, but if I delete entry I have "server failed", root dns (or isp dns) don't answer me.

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• Data Validation of a Comma Delimited List

  - by Brad

  I need a simple way of taking a comma seperated list in a cell, and providing a drop down box to select one of them. For Example, the cell could contain: 24, 32, 40, 48, 56, 64 And in a further cell, using Data Validation, I want to provide a drop-down list to select ONE of those values I need to do this without VBA or Macros please. Apolgies, I want this to work with Excel 2010 and later. I have been playing around with counting the number of commas in the list and then trying to split this into a number of rows of single numbers etc with no joy yet.

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• cpu usage nearly 100 constantly windows xp sp3

  - by user33882

  When running some heavy applications like games or virtual box for some time.. the cpu usage is normal for some 15 mins and then suddently cpu usage increases. even after i quit the heavy apps and when i start some other apps, the cpu usage of the new opened application is also very high.. this continues until i reboot the system. There is single particular process occupy more cpu. All the processes cpu usage is little high than normal.. Any solutions?

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• Srvany Starts but Application doesn't

  - by mharran

  I used Instsrv and Srvany as to create a service on W2008; the Srvany service starts okay but the application does not start. The application is TeamSpeak 3 btw. I don't think it's an issue with my W2008 setup as I have a previous version of the application set up the exact same way and running perfectly. Also, I have no problem manually starting the application even when I copy and paste into the 'Run' box the path used for the application by Srvany. I looked at Events but nothing there except notification that the service has entered the running state, didn't really expect any errors as the service has started even though the application hasn't. Any suggestions on what could be the problem?

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• Help accessing Beagle over serial with Minicom/GTKTerm

  - by mrgordon

  I am trying to access a brand new Beagle Board from Ubuntu or Mac over serial using the setup seen here: http://specialcomp.com/beagleboard/RevC1.htm I got Minicom and GTKTerm installed on the Ubuntu box. I set up the correct baud rate, turned off flow control, and have tried ttyUSB0 and ttyS0. Once minicom is configured properly, I should just see the init text from the board appear if I have minicom open in terminal while I plug in the board, correct? dmesg shows ttyUSB0 on the computer has been connected to ttyS0 on the beagle.

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• How to synchronize users, passwords, hosts, etc without NIS

  - by joshxdr

  I am administering a very small solaris 2.6 network with 4 boxes total. Is it possible to use scp or similar to replace NIS for synchronizing users, groups, hosts, etc? This network is only a small part of my job and I don't want to spend too much time on it, and I am worried the setup and maintenence of NIS will not pay off. I need it to behave like a proper multi-user system, when a user logs into any machine, the users, passwords, hosts, etc. are always the same. Is there an easy way to do this with scp? Right now I copy /etc/passwd from one box to another with scp, but sometimes I make mistakes or forget a step, and scp inside of shell scripts don't seem to works so well since they require password authentication. Any recommendations would be welcome.

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• HP Media Smart remote access

  - by Coov

  I just purchased this box for home backups for my pc's and mac's. Everything works great accept for the remote access part. I can RD into the machine locally but I can't get to it from outside of my network. I've enabled port forwarding on my router but it doesn't seem to matter. I checked with Qwest and they don't block these ports so I'm at a loss. I do have Vonage in front of my router but I've taken it out and it didn't make a difference. I suspect I've made an error with my router setup. I'm a programmer and I'm playing in the world of the unknown here. I'm lost. Any suggestions?

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• Avoid Apache's mod_status being exposed by Varnish

  - by Peteris Caune

  An Ubuntu 9.04 box running Apache on 8080 and Varnish on 80. Recently set up Munin and was wondering why Apache graphs are empty. Saw from the logs that Munin is accessing /server-status?auto and getting 403 Forbidden back. So I edited /etc/apache2/monds-enabled/status.conf to allow access from 127.0.0.1. But doing this actually made /server-status public, since requests coming through Varnish appear to come from 127.0.0.1 too. So the question is, how do I configure mod_status to be accessible only by munin-node and not by Varnish?

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• Feeding the kernels entropy source from other machines and/or increasing its maximum size

  - by David Spillett

  We have has a little trouble with a small box that acts as a VPN end-point and mail relay for our network, caused by the available entropy for /dev/random being too low (which causes TLS connection attempts by exim to fail). The machine doesn't do anything else, so the normal feed into the entropy pool (interrupt timings from things like disk access) is not enough. As a quick hack I've set a looping script that reads from /dev/hda at a couple of Mbyte/sec which keeps it topped up. Other than buying a hardware RNG, is there a clean way of piping data for entry from elsewhere, such as a copy of the data our file server uses for its entropy source? I've spotted several tips for using rng-tools to feed it from /dev/urandom on the same machine but that "feels dirty". Also, is it possible to increase the maximum pool size? It currently seems to max out at 3585.

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• How do I securely share / allow access to a drive?

  - by sleske

  To simplify backing up a laptop (Windows Vista), I'm planning on sharing its C: drive (with password protection) and using that to back it up from another computer. What are the security implications of this? If I share C: with a reasonable password, how big is the risk of compromise if the system is e.g. inadvertently used on a public WLAN or similar? Background: I'm planning to use [Areca Backup][1] to back up two systems (Windows XP and Vista). My current plan is to install Areca on the XP box, and share the Vista system's C: as a shared folder, so the XP system can read it. Then I can set up the drive as a network drive and have Areca read it like a local drive. Of course, if you can think of a more elegant way of doing this, I'm open to suggestions.

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• Media Center is sending duplicate #'s when changing channels

  - by Robert

  I recently switched from cable to DirecTV (satellite). I went through the "Set up TV signal" in Media Center, and I went through the manual setup of the remote as it didn't recognize the DirecTV remote. All seemed okay, except sometimes (often - about 1/2 the time) when I select a channel in Media Center's guide it sends 5527 instead of 527 or 5446 instead of 546 - so it doesn't change the channel correctly. (I see the numbers show up on the TV screen before the channel changes.) I tried re-learning the remote, but the problem is still there. (Media Center is changing channels through the IR Blaster attached to the front of the DirecTV box.)

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• How To Create An FTP User That Has Permission To EVERYTHING

  - by Serg

  I've spent the last two hours trying to create an FTP user so I can transfer some files over to my Wordpress blog folder. /var/www/sergiotapia.me I'm using vsftpd and Ubuntu 12.04 for my FTP server and I've read tons of documentation, none of which seem to work. I still cannot log in with the FTP user, let alone test if I even have the read/write file permissions. Can a Linux guru here, help me out with a small step by step? I'm comfortable with the terminal and nano, so that's not an issue - I'll SSH into my box. Just tell me what to do and what commands to run. Specifically, this user needs to have read and write access to the /var/ folder and anything within it. I want to have 1 user that can do whatever the heck he wants on my Ubuntu 12.04 VPS machine.

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• Virtualbox and getting the Locked VT-x Error when trying to use more than 1 processor on the session

  - by Dave

  I have installed the latest version of virtualbox onto my Hewlett Pakard (h8-1170uk) I have a intel i7 2600 cpu and 8 gb of ram I can get virtual box to create several sessions of different operating systems at the same time, but whenever i try to get 1 session to open up using more than 1 processor option select ( i wanted one of my session access to 2 processors ) i keep getting this error message VT-x features locked or unavailable in MSR. (VERR_VMX_MSR_LOCKED_OR_DISABLED). Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb} I have search many times and cannot find a option to correct this. I have check my BIOS and there are no options about VT-x or Virtualisation or anything. Am i doing something wrong ? Why does Virtualbox run fine when just using the 1 processor option ?

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• System Restore Points

  - by Ross Lordon

  Currently I am investigating how to schedule an automatic initiation of a system restore point for all of the workstations in my office. It seems that Task Scheduler already has some nice defaults (screenshots below). Even the history for this task verifies that it is running successfully. However, when I go to Recovery in the Control Panel it only lists the System Restore Points one for every previous for only 3 weeks back even if I check the show more restore points box. Why don't the additional ones appear? Would there be a better way to implement a solution, like via group policy or a script? Is there any documentation on this online? I've been having a hard time tracking anything down except how to subvert group policy disabling this feature.

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• Lost Root and other user passwords

  - by Webnet

  This isn't a huge deal, because there's very little on the server (literally a file or two) that we actually need off of it. But we disabled root logins as a security measure and can't remember any of our other user passwords. I'm assuming that there's nothing we can do at this point to get into the server? I'm sitting next to the box... Update Oops... actually, I need to export an SVN off of this server. So yeah, there's stuff I need.

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• How do I setup Apache with FastCGI and Ruby?

  - by sdellysse

  I've been reading alot of forum posts, tutorials, etc., about setting up apache under linux with fastcgi. I'm trying to run fcgi for some of my ruby development (not rails), but I figure it should apply to any language. Please note that I already have apache, fastcgi, ruby-fcgi, and the like already installed on my web box. Conceptually, I'm having a hard time with it. Does apache spawn the specified fcgi processes as needed? Do I start them along side apache? Basically, I'm trying to get to a point where I am able to ask the proper questions, so apologies if the title is misleading.

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• Migrating to LDAP

  - by Frank Brenner

  Hi Folks, I've started a new job at a house where they've got an amazingly unruly patchwork of Linux, xBSD, and OpenSolaris boxes. Every box has its own user auth using local /etc/passwd, etc. Users/Groups have differing uids/gids on each machine, and each machine has its own /home/ tree. (no central NAS /homes) My job is get get everything into an LDAP directory and use that for login auth. How do I get LDAP to deal with the differing uids/gids? Thanks.

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• Bios wont post unless I restart power supply.

  - by remy

  I have an annoying problem with a computer. The BIOS wont post after it has been turned off and started again unless I turn the switch off/on on the power supply. The fans, cdrom hdd and everything starts running but the bios never beeps and the monitor stays black. I HAVE TRIED: reinstalling windows xp, flashed bios to latest, cmos clear, new power supply, other hdd, new memory sticks, graphics card. I also removed the motherboard from the computer case and laid it on a cardboard box and only connected the PSU, RAM and CPU. Other than this the computer works great but its annoying having to off/on the power supply switch before turning it on after its been off. My guess is that the motherboard is faulty but I would just like to hear what you guys think. Sorry for my english / Remy

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• Throttling apache downloads selectively

  - by Synchro

  I have a linux box running Debian Sarge (old I know) and apache 2.0.54. It serves two kinds of files - regular web pages and small images, and a lot of large podcast mp3s. The podcast downloads swamp the connection and make the rest of the site unresponsive, so I'm looking to throttle the data transfer rate (not the request rate) of just the podcasts. I've set up haproxy using this technique which does what it says it will, but solves a different problem - even only 5 simultaneous podcast downloads is enough to saturate the link. In a perfect world, haproxy would support per-connection throttling, but it doesn't. So far I've looked at mod_bw (won't compile for me, seems unsupported), mod_cband (unsupported, widely reported as problematic) and iptables using tc. The iptables approach would allow me to throttle things, but would not be at all selective, slowing down everything on the server, not just the podcasts, so would just move the bottleneck without changing overall behaviour. Ideas?

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• Disable RAID Controller

  - by B.Mr.W.

  I have some decent HP Proliants server that come with "HP Smart Array P410i Controller" enabled, I am using these boxes to set up a Hadoop cluster and I know, RAID is for sure a no-no for Hadoop since the application itself will take care of data redundancy and extra intelligence provided by RAID won't be helpful and might turn down the performance. I tried to disable the devices at the BIOS and the box cannot even access the disk afterwards. So I am assuming the controller is sitting between disks and mother board, and we have to turn it on and configure it to "level0" or something like that. I am wondering what should I do to "disable" the RAID functionality so it will fit into the Hadoop environment.

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• How can you configure the uPnP server on windows home server?

  - by pschorf

  I'm currently helping my parents with their home network set up while I'm home. I have a Synology NAS device which supports a uPnP server. I have a few MPEG-4 movies stored on the box, and simply enabling the uPnP server on the NAS streamed the video to some devices they have, including their Xbox 360 and Samsung television. They have a windows home server (HP MediaSmart.) I put one of the movies in the "Videos" folder of the device, and enabled sharing. It shows up on the television, but when played it produces an "unsupported file type" error. I have all of the transcoding settings disabled on the Synology device, so it should be streaming the same file. Is there some additional configuration I need to perform on the home server unit?

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• Wireless dropouts that only affect subset of devices

  - by jwaddell

  When watching videos streamed over WiFi from a NAS box (D-Link DNS-323) I am getting wireless dropouts. However they only appear to occur when I have left my laptop (Dell Inspiron 9300 running Windows XP SP3) running; the laptop is usually suspended if I'm not using it. The dropouts have occurred when streaming to a Netgear EVA8000 streaming device, and also to a PS3. I'm using a Netgear DG834G as the wireless modem/router. When a dropout occurs I go to the laptop and see that its wireless connection has also dropped out. The odd thing is that my wife's MacBook and my iPhone still maintain their connections. What could be causing this behaviour, and how do I go about fixing it?

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• MySQL will Stop working after being Started

  - by user115343

  i am new to a webserver thing. I use Centmin mod to install nginx + mariaDB to setup small wordpress blog,the first day it is ok,there are nice "hello world" on my box's IP,but today i have checked that mysql is stop working so i immediately start it again but it is stoped again after some minutes! i use this tutorial but still,it will stop after some period here is my log [root@rylai ~]# tail -f /var/log/mysqld.log 120326 16:19:05 [Note] Plugin 'PBXT_STATISTICS' is disabled. 120326 16:19:05 [Note] Plugin 'InnoDB' is disabled. 120326 16:19:06 [Note] Event Scheduler: Loaded 0 events 120326 16:19:06 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.2.10-MariaDB-mariadb107' socket: '/var/lib/mysql/mysql.sock' port: 3306 (MariaDB - http://mariadb.com/) 120326 16:20:36 mysqld_safe Number of processes running now: 0 120326 16:20:36 mysqld_safe mysqld restarted 120326 16:20:39 [Note] Plugin 'ARCHIVE' is disabled. 120326 16:20:39 [Note] Plugin 'FEDERATED' is disabled. 120326 16:20:40 mysqld_safe mysqld from pid file /var/lib/mysql/rylai.pid ended I only access mysql on CLI,didnt install any panel yet

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• Good free software to track and graph memory and CPU usage on Windows?

  - by TheLQ

  There are many questions on Linux memory tracking, but I haven't seen any for Windows. In my case however its a Windows XP Pro box I need to track the memory and CPU usage of. The reason I need it is due to a server program I'm trying that is eating all my processor and some of my memory which is freezing my RDP session and System Explorer and even makes it difficult to login physically. As this is a very constrained server I'm working off of (768 MB RAM with Pentium 4 which disappears with this program), I need a program that doesn't run/require a webserver. I can give it a MySQL database if necessary however. Is there any suggestions for such a program?

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• nginx: rewrite URL but have original URL stored in access.log as 200

  - by mhambra

  I'm setting up a link tracking system, which (temporarily) involves adding /link/id/ in front of URL (like http://server/data/id/publication/id/). rewrite data/id/(.*) http://server/$1; The request is logged as: ip - - [17/Nov/2011:10:07:19 +0300] "GET /data/id/publication/id.html HTTP/1.1" 302 154 "-" "UA"` For some reason (keeping the compatibility with AWStats) it is wanted to have 200 logged instead of 302. (nginx allows to get 301 code out of box with permanent option, but thats inappropriate too) What are my options here? Will the combination of location { } and rewrite do the job?

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