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• Vista - perform scheduled actions only if screen is not locked

  - by Syntax Error

  Ok, here's the general idea of what I want to do. After a certain time, I would like the computer to nag me to go to sleep. Maybe every five minutes or so. But I don't want the messages to pop up if the screen is locked, because I leave it like that all night. Ideally I would like to be able to do more things like shut down running instances the web browser, or lock my user session if I ignore the notices for too long. But I'm happy with just popup messages if that's all I can do. So, how much of this is possible and where do I start? I'm not too well versed with task scheduler, and I'm assuming I'll use that to at least start whatever script I have to put together.

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• How do I access an Ubuntu VirtualBox guest at a static IP from an OS X host?

  - by David Siegel

  How does one configure an Ubuntu guest to use a static IP that's visible to an OS X host, and ensure that the static IP is independent of the host's network configuration? I previously used bridged networking for my guest, but I'm constantly moving my host between networks so the guest IP is always different. First, I tried setting the guest network configuration to NAT and forwarding host port 1022 to guest port 22, so I could at least ssh to a fixed address (localhost:1022): $ VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/e1000/0/LUN#0/Config/SSH/Protocol" "TCP" $ VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/e1000/0/LUN#0/Config/SSH/GuestPort" 22 $ VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/e1000/0/LUN#0/Config/SSH/HostPort" 1022 Then, $ ssh localhost -p 1022 ssh: connect to host localhost port 1022: Connection refused But this didn't work (guest has no network access with NAT and OS X refused the connection, as you can see). I'd love a general solution that would let me communicate with my guest at a fixed IP.

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• Datacenter Backup Strategy

  - by EasyEcho

  What are common approaches to backup solutions in remote data centers? I am already familiar with general backup principals and have a very good backup strategy for our local data center but am having great difficulty extending it to a remote data center. We currently do a full backup on Friday, differential Mon - Thu, rotate offsite Friday morning ...rinse and repeat week after week. BTW, we use disks and have been very happy with this approach. We could buy a large storage server and backup everything to it, but this solution doesn't give you offsite. We could encrypt and upload to Amazon or some other online storage but that would take a large amount of time given the data and would be rather expensive paying for the bandwidth leaving the data center and receiving at amazon. We could drive to the data center every Friday and continue to rotate disks as we do now. But that just seems old fashion. What am I missing, are there better options?

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• Disadvantages of enabling AHCI after Win7 install

  - by Mario De Schaepmeester

  I've formatted my notebook that has a 5400RPM HDD with ~500GB capacity. After installing Windows 7 and about half the drivers (including chipset) I began to doubt whether to go for IDE or AHCI mode for my hard drive. There used to be a lot of discussion on the internet which is better and so far I understood it was particularly helpful on SSDs. Now the general consensus seems to be that AHCI mode is best for most hard drives. I have thus enabled AHCI in the middle of configuring my notebook (rest of the drivers, necessary software etc...) Two questions: considering my HDD's spec above, should I leave it on? Is there any disadvantage of enabling it after Windows 7 and chipset drivers installation? Windows 7 version is 64 bit Home Premium.

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• How to lie to Win98 about USB drivers?

  - by BCS

  I have a new printer and a old (Windows 98) system (that can't be upgraded). I've been told that some of the drivers for older printers of the same make are very likely to work just fine for it if I can talk windows into using them. Is there a way to edit the map of device IDs (VID/PID?) to USB drivers? The specific kind of tool I'm looking for should work for any kind of USB drivers, not just printers. OTOH if someone knows of a technique that work for some kinds of printers, that could be of (general) interest.

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• How to configure auto-logon in Active Directory

  - by Jonas Stensved

  I need to improve our account management (using Active Directory) for a customer support site with 50+ computers. The default "AD"-way is to give each user their own account. This adds up with a lot of administration with adding/disabling/enabling user accounts. To avoid this supervisors have started to use shared "general" accounts like domain\callcenter2 etc and I don't like the idea of everyone knowing and sharing accounts and passwords. Our ideal solution would be to create a group with computers which requires no login by the user. I.e. the users just have to start the computer. Should I configure auto-logon with a single user account like domain\agentAccount? Is there anything else to consider if I use the same account for all users? How do I configure the actual auto-logon with a GPO on the group? Is there a "Microsoft way" without 3rd party plugins? Or is there a better solution?

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• A space-efficient guest filesystem for grow-as-needed virtual disks ?

  - by Steve Schnepp

  A common practice is to use non-preallocated virtual disks. Since they only grow as needed, it makes them perfect for fast backup, overallocation and creation speed. Since file systems are usually based on physical disks they have the tendency to use the whole area available1 in order to increase the speed2 or reliability3. I'm searching a filesystem that does the exact opposite : try to touch the minimum blocks need by an aggressive block reuse. I would happily trade some performance for space usage. There is already a similar question, but it is rather general. I have very specific goal : space-efficiency. 1. Like page caching uses all the free physical memory 2. Canonical example : online defragmentation 3. Canonical example : snapshotting

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• Run command before and after printing with CUPS?

  - by leto

  Hello, this is a home setup. A central printer server (Linux) manages the queue, a HP 2430DTN is attached to it via 100Mbit/sec Ethernet. The printer is hooked up to a managable power source. A shell script watches the queue on the server (lpstat -o) and turn on the printer when there is a job. If the queue is empty for 10 minutes it turns the printer off. Now this setup messes up, stops the printer etc. after a couple of weeks and is in general "not so reliable". I now know how to change the stop-printer thing, but: Is there a way to run my turn printer on script and turn printer off script directly from cups without watching the queue? That would be so cool!

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• What are the best possible ways to benchmark RAM (no-ECC) under linux / arm?

  - by moul

  I want to test integrity and global performances of no-ECC memory chips on a custom board Are there some tools that run under linux so I can monitor system and global temperature in the same time ? Are there some no-ECC specific tests to do in general ? EDIT 1: I already know how to monitor temperature (I use a special platform feature /sys/devices/platform/......../temp1_input). For now : wazoox : it works but I've to code my own tests Jason Huntley : ramspeed : does not work on arm stream benchmark : it works and is very fast, so I'll look if it's accurate and complete memtest : I'll try later, since it does not run directly from linux stress for fedora : I'll try later too, it's too problematic for me to install fedora now I found this distribution : http://www.stresslinux.org/sl/ I'll continue to check tools that run directly under linux without too big dependencies, after I'll maybe give a try to solutions like stresslinux, memtest, stress for fedora. Thanks for you answers, I'll continue to investigate

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• Looking for temporal upsampling / motion interpolation software

  - by timday

  I'm looking for something (prereably FOSS software) which can take an animation with N images as input, and which will output an animation with M frames, where M is in the range 2N to 5N or so. I believe the general technique is called "temporal upsampling" or possibly "inbetweening" (or "'tweening" for short). Note that it does need to make some effort to do motion tracking of things in the scene ("optical flow"); just fading ("dissolve") between keyframes isn't going to cut it. Googling "temporal upsampling" turns up any number of papers on the subject, but I've yet to discover any code/software (a gstreamer plugin would be perfect) I can just use to try the technique out. Any suggestions ? Additional information: "Motion interpolation" seems to be the more widely used name in the TV world for what I'm looking for. See this and the video here too. Interestingly, some cinephiles seem to hate what these technologies do to 24FPS film: e.g a comment "makes Gone With The Wind look like a soap opera shot on video".

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• Nginx vs Apache as reverse proxy, which one to choose

  - by mhd

  Hi, this kind of question maybe has been asked here but I couldn't find any that really match my question. Heard that nginx performance is quite impressive, but Apache has more docs, community(read:expert) to get help Now what I want to know, how both web servers compare in term of performance, easiness of config, level of customization,etc. AS REVERSE PROXY server in a vps environment?? I'm still weighing between the two for a ruby web app(not ROR) served with thin server. Specific answer will be much appreciated. General answer not touching the ruby part is okay. I'm still noob in web server administration.

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• How to set specific environment variables for Apache service run on Windows

  - by Jimm Chen

  I'm facing a problem. I use xampp 1.7.7 on Windows which installs a Apache service. I find that I have to some tweak to have all PHP modules load properly. For example, php_ldap.dll cannot be loaded. It is mysterious why it cannot be loaded until I tried to run httpd.exe from command line, which reveals that libsasl.dll cannot be founded. Actually, there exist D:\xampp\php\libsasl.dll but httpd.exe cannot find it. OK. The best way is to add D:\xampp\php to PATH env-var. Now my question is: How do I set a specific PATH value for that specific Apache service but not system wide. -- because I think it is better not to disturb other processes with that extra PATH value. Is there a general way to do that for a specific Windows service? or, is there a Apache specific way to load extra env-var settings from some specific configuration files?

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• How much does the geographical location of DNS servers matter?

  - by GreatFire

  We have started to run our own DNS servers located in Asia since that's where our main audience is. However, it seems that some users in the US are having difficulties accessing our website sometimes. I've noticed myself that DNS lookups of our domain from the US are relatively slow (500 msec+). Maybe the problems some users are having are due to other DNS configuration errors, but in general, how much of an issue is the geographical location of DNS servers? Should we have an additional server in the US?

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• Data take on with Drupal 6

  - by Robert MacLean

  We are migrating our current intranet to Drupal 6 and there is a lot of data within the current system which can be classified into: List data, general lists of fields. Common use is phone list of the employees phone numbers. Document repository. Just basically a web version of a file share for documents. I can easily get the data + meta infomation out, but how do I bulk upload the two types of data into Drupal, as uploading the hundred of thousands of items manually is just not acceptable.

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• How can I evaluate the best choice of archive format for compressing files?

  - by Mehrdad

  In general, I've observed the following: Linux-y files or tools use bzip2 or gzip for distributing archives Windows-y files or tools use ZIP for distributing archives Many people use 7-Zip for creating and distributing their own archives Questions: What are the advantages and disadvantages of these formats, all of which appear to be open formats? When/why should I choose one (say, 7-Zip) over another (say, ZIP)? Why does the trend above appear to hold, even though all of these are portable formats? Are there any particular advantages to using a particular archive format on a particular platform?

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• What free OS should I use on my VPS?

  - by earlz

  Hello, I looked a bit but didn't see any duplicate of this so my question is which free(open source) OS do you use on servers and why do you use that OS? Background I have a VPS at Linode. There is a broad range of options for which OS I can put on it including both 32 and 64bit OSs. I just use it to run my small blog and for hosting random files. It's very low traffic. I have been using 64bit Arch Linux on my VPS and though I love the OS for general usage, for a server the constant breakage is troublesome. So I'm considering trying something new and am looking for suggestions.

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• Why do we still have to use drive letters to identify file systems?

  - by Charles E. Grant

  A friend has run into a problem where they installed Windows 7 from an external drive, and the internal boot drive is now assigned to H:. Theoretically this shouldn't cause problems because there are programming interfaces for getting the drive letter for the system drive. In practice though, there are quite a few programs that assume that C: is the only possible location for the system directories, and they refuse to run with the system directories on H:. That's not Microsoft's fault, but it's a pain none-the-less. The general consensus seems to be that a re-install, setting the internal boot drive to C:, is the only way to avoid fix these problems. UNIX-like systems display all file systems in a single unified directory tree and mostly seem to avoid problems like this. Is it possible to configure a Windows system without reference to drive letters, or does the importance of backwards compatibility mean that Windows will be working with drive letters from now until doomsday?

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• Optimal dir strcuture for keeping millions of files on an ext4 system

  - by Alex Flo

  I need to keep millions of files on an ext4 system. I understand that having a structure with multiple subdirectories is the general accepted solution. I wonder what would be the optimal approach in terms of number of dirs/subdirs. For example I tried a structure like 16/16/16/16 (that is, (sub)directories from 1 to 16) and I found that I am able to move 100K files to this structure in 2m50s. When trying to move 100K files to a 8/8/8/8/8/8 structure it took 11 minutes. So the 16/16/16/16 approach seems to be better but I was wondering if anyone has some empirical experience with an even better dir/subdir distribution.

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• What rights does an employer have to the employee's computer?

  - by Terrence Brannon

  What access rights should an employee grant an employer for a work computer? For instance, let's assume that the business people come to the IT lab late at night for discussions with the CIO and they use my computer for reading email and general web surfing. In a sense, this means that they are taking full or partial responsibility for any security issues that crop up that get traced back to the employee's machine. Perhaps the proper way to provide a computer to an employee is to give him full and exclusive use of it while employed. Only supervised access (such as hardware/software maintenance) should be acceptable.

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• I'm using a compatible active DisplayPort to DVI adapter with EyeFinity, why does my monitor still flicker?

  - by Christopher Galpin

  I specifically chose an active DisplayPort <- DVI adapter for use with EyeFinity right out of my graphic card vendor's list of confirmed compatible adapters. Yet the screen fails horribly, it blinks on and off constantly, sometimes the graphics go screwy and the appropriate resolutions won't be available. Sometimes the resolution will be available but I'll discover it's only with interlaced refresh rates and bounces up and down. I have to switch the resolution back and forth, again and again, to get it to work correctly, and then it fails again and the process must be repeated the moment the monitor is turned off or I reboot. It's maddening. What is wrong? Is my GFX card supplying insufficient voltage? (Firmware tweaks allegedly help some people, but my card's isn't modifiable.) Could the adapter be defective? Is it not "active" enough for my card and I need an expensive powered adapter? Is this endemic to DisplayPort in general?

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• Enable System Beep in Ubuntu

  - by Melissa W

  I have tried and tried to get the system beep working, but with no success. I have selected System--Sound--System Beep--Enable Audible Beep (from the Gnome Desktop) I have tried from a Terminal window Edit--General Tab--Selecting terminal bell checkbox I have tried entering modprobe pcspkr at the command line. Trying echo -e '\a' or using the beep application - Nothing works! I know my hardware speaker works, because if on startup the battery is low it will beep. Update: It is a laptop computer. It is an IBM Thinkpad, iSeries. I did look at the modprobe blacklist, and pcspkr was not listed.

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• how to start with unmanaged vps?

  - by GaVrA

  Hello! I have a managed VPS, so whatever i need i can just ask my support, and they will do it for me. Now i plan to migrate to unmanaged VPS, so i need some guides, tips on how and where to start learning. I will have more specific questions once i start using it, but now i just need some general answers about this topic. Thanks. Update: Ok, i have decided to go for unmanaged VPS with cPanel. OS is CentOS-5. I contacted support only for some small(i think) things like creating new account in whm, some database importing, installing new software(rare)... What i will be using is apache, php, mysql. I think i will be able to cope with upgrading to new versions, so the thing that interests me the most is security i guess.

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• Own hosting, own domain on Virtualbox Ubuntu server - dynamic IP

  - by Pawel

  Hi, I have bought my TLD domain, say domain.com. What I'd like to do is to host the website available under this address on my own computer. I'm assigned a dynamic IP, and I'm also behind a router in my local network. I'd run sites on my ubuntu server on a virtualbox machine which is available in my local network. Preferably, I'd like to have my own domain on some server, with which I could experiment as much as I need (so it's only for educational purposes), but I can't afford to buy such a service. Is it feasible? Can you provide steps I'd need to take to configure it (could be just general explanation). I'd need some guidance, please.

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• Configure Git to use Beyond Compare for image diff

  - by Barney

  Because we work with a number of sprites, the kind of specialised diff views provided by Beyond Compare would be ideal to see which one of 2 versions I'm after when conflicts arise. I've already configured Git to use Beyond Compare as my primary diff and merge tool as described in their integration guide — it specifically goes into how to configure TortoiseSVN to use it for images, and I've found these articles talking about .gitattributes in general and how to script interactions from a *nix shell — but it's not obvious to me how I can use the advice provided by these guides to make a simple change that would say "use the default diff & merge bindings for files determined to be images, too". For the record, I'm doing all this on Windows :P

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• Looking for temporal upsampling software

  - by timday

  I'm looking for something (prereably FOSS software) which can take an animation with N images as input, and which will output an animation with M frames, where M is in the range 2N to 5N or so. I believe the general technique is called "temporal upsampling" or possibly "inbetweening" (or "'tweening" for short). Note that it does need to make some effort to do motion tracking of things in the scene ("optical flow"); just fading ("dissolve") between keyframes isn't going to cut it. Googling "temporal upsampling" turns up any number of papers on the subject, but I've yet to discover any code/software I can just use to try the technique out. Any suggestions ?

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