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• Hot-swapping drives

  - by user57770

  I have hot swap drives and controllers, but have never actually used the hot swap capability. What is the procedure for doing so? Do I need to warn Linux that I'm about to pull a drive out? Should I do anything after I put a drive back in? Does it make a difference whether the drive is part of a RAID set? The drives are generally RAIDed, but not always. Any RAID sets are managed by Linux, rather than the controller. The machines are running Fedora and CentOS.

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• Why doesn't my cron.d per minute job run?

  - by Travis Griggs

  I have thrown a bunch of darts trying to get a python script of mine to execute every minute. So I thought I'd simplify it to just do the "simplest thing that could could possibly work" once per minute (I'm running debian/testing). I created a single line file in /etc/cron.d/perminute: * * * * * /bin/touch /home/me/ding_dong It's owned by root, and executable (not sure if either of those matter). And then I did: sudo service cron reload And then sit back and start running ls -ltr again and again in my home directory (/home/me). But my ding_dong file never shows up. I know if I do a sudo /bin/touch /home/me/ding_dong, it shows up right away. Obviously missing something stupid here.

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• My new Xbox 360 drive doesn't show up

  - by RobbieGee

  I bought an Xbox 360 Arcade version a while ago and today I got a 120GB drive from a shop that had a closedown sale. I put the drive on the side as per the picture on the back side of the drive. When I go to settings and look at memory, it only finds the built in memory chip, not the harddrive. Am I doing it correct? I have almost never used my Xbox so I'm not sure if there's anything more to it. I don't think I fitted the drive wrong either, it seems pretty much impossible to do it wrong. The box came with only the drive, it doesn't have any transfer kit or the likes.

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• Why is the System process listening on Port 443?

  - by Cornelius

  I am having problems starting my apache server, because port 443 is already in use. It turns out, the system process (PID 4) uses the port 443. I don't have IIS installed, the services.msc shows (predicatbly) no Exchange server running, nor WWW-Services, nor IIS. I have no idea how to find out what service uses that port short of just disabling each service one after the other, and I am not even sure that would help. I would be grateful if someone could point me towards how I can get my SSL port back, thank you :) P.S.: Of course "just switch apache to another port for SSL" would solve the problem of not being able to start apache. But I'd still like to know what is so insistent about hogging port 443. :) Edit: I by now took the 'hard route' and disabled services one after the other. It turned out that the "Routing and RAS" service was the culprit. Thank you all for the valuable input and the new tools in the combat against "WTF does my system do now".

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• Store scores for players and produce a high score list

  - by zrvan

  This question is derived from an interview question that I got for a job I was declined. I have asked for code review for my solution at the dedicated Stack Exchange site. But I hope this question is sufficiently rephrased and asked with a different motivation not to be a duplicate of the other question. Consider the following scenario: You should store player scores in the server back end of a game. The server is written in Java. Every score should be registered, that is, one player may have any number of scores for any number of levels. A high score list should be produced with the fifteen top scores for a given level, but only one score per user (to the effect that even if player X has the two highest scores for level Y, only the first position is counted and player Z has the second place). No information should be persisted and only Java 1.7+ standard libraries should be used. No third party libraries or frameworks are acceptable. With the number of players as the primary factor, what would be the best data structure in terms of scalability and concurrency? How would you access the structure to register a single score given a level and a player id? How would you access the structure to compile the high score list?

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• Attempting to install ubuntu 11.10

  - by Orin

  I installed version 9 sometime ago and since have forgotten the process for partitioning, or the layout is different. I have 5 partitions but only have windows xp installed on the pc in question with that being the one of those 5 partitions which is ntfs 34444 mb its - a 40gig hard-drive. My first question is... is there a way to get a screen shot of the partitioner when I am running the demo session straight from disc... these 5 partitions are fragmenting the other 4ish gig needed to install.. I get an error message which says go back and make sure 1 partition has at least 2.5 gig or so. But I have no idea what I am supposed to set these remaining 4 partitions to in order to proceed.. I have read up on install guides and understand that one must be "/" root and another as swap... but to no avail thus far have the correct combo. A few screen shots will no doubt help you guys answer as I'm baffled as to what specific details to give as each one has various settings on inspection, and I don't really feel like writing it all down manually then posting specs for each one

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• Windows 7 startup problem

  - by elaine

  I purchased a computer a few weeks ago which runs on Windows 7. I was just watching a show on Hulu when it shut off. I don't know if I accidently pushed the power button with the keyboard or what. When I turned it back on my first screen says F5 key for HDD recovery. I pressed the F5 button and the screen goes to a Windows setup (EMS enabled) screen which then goes to my regular Starting Windows. After that one I get the box with x:/windows/system32/cmd.exe-startnent.cmd. If I don't press the F5 button I go to a screen which tells me Windows failed to start, a recent hardware or software change might be the cause. It gives me two options- Launch Setup REpair(recommended) or start Windows normally. I've pressed enter to choose the first choice but it does nothing but brings me to the same screen. Anyone have any ideas?

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• Second monitor sometimes will not wake up

  - by peacedog

  My workstation has two monitors and Windows 7 (64bit). Sometimes when I lock my computer and later return and unlock it, the second monitor won't wake up. I have to turn that monitor off and on to get the picture back. They are identical monitors. The "#2" monitor is set as the main display, if that matters. I glanced at the power saving settings but didn't see anything noteworthy, and I'm not sure what I would be looking for (or if that is the right place to look) in the first place. It's not the end of the world but it is annoying. Help?

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• Is there a postfix mysql virtual_maps append_at_origin workaround so I can pipe to external scripts?

  - by FilmJ

  I am using virtual domains, and I'd like to setup the server to alias to custom scripts. I manage all accounts using postfix mappings to mysql. It seems that postfix automatically appends a virtual domain regardless of how the forwarded/aliased result comes back. So even though i have: "|/bin/command" postfix is reading it as: "|/bin/command"@mydomain.com Is there any work-around, or setting I can fix? It would seem than append_at_myorigin=no would be ideal, but that's unsupported according to the documentation. Another option, maybe I can skip virtual aliases altogether and use the "/etc/postfix/aliases" table - assuming all emails go to the main domain. I'll try this, but if anyone has any other ideas how to make it work with virtual domains, please let me know as this would be very useful! Thanks.

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• Excel DataFlow UML Viewer/Navigator/Visualiser tool/ hint

  - by Arjang

  Not sure what to call it but, is there a birds eye view tool for excel to show the data flow between excel sheets/cels etc? I have inherited some huge reports and looking at each cell to see where it's data comes from or what sheet/cell dependencies it has is a nightmare. Or even just something with excel that show the dependencies within a sheet of cells to each other etc. Or Any other visualization tool that can show the data flow between cells ( I tried visio but it seemed it is only for making diagrams of data not the data model of excel itself ). Or at least if I am within a cell and see a formula referring to other sheets and cells, is there a quick way to navigate there and back? Like code navigation in VS? Thank you for your help

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• internet without dns tennis play [closed]

  - by Curious

  Why do we make DNS requests separately when an ISP could also be handling the DNS request along with HTTP data simultaneously. So rather than: Ask opendns what yahoos address is. Opendns returns: 66.55.44.11 Hey, Verizon. Send/Request data from 66.55.44.11. Why wouldn't the protocol just request data from "yahoo.com" and verizon interprets the yahoo.com as a split DNS request. This would lower latency for sure as it cuts out the time required for the dns server to call back the IP to then be sent AGAIN when it could just be handling the entire request theoretically. Couldn't this be managed via a host file change on the client side and make compatible servers?? So much like a proxy.

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• Server 2003 saying unlicensed

  - by nat

  I came in this morning to our windows 2003 server - running only SQL server 2005 saying it was unlicensed. When logged straight onto the box as soon as I got past the login, it popped up the click yes to license, did that and it would just loop back around to the login. It wouldn't turn off, couldn't remote to it, after a power off and reboot, it magically decided it was in fact licensed. It didn't appear to be low on disc space or other resources. Logs not showing anything out of the ordinary. Has anyone else experienced this, or might have an idea as to what just happened? Any help much appreciated.

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• sendmail error "Relaying denied. Proper authentication required. (state 14)."

  - by renevdkooi

  I am an absolute newB on sendmail, now I installed sendmail, configured it (as far as i know) added localhost-names, added access entries added virtuser entry, opened port 25 in iptables. Now when I connect from another location on the internet, and use telnet server.com 25 and use manual SMTP commands (HELO, MAIL From etc) the mail goes and arrives and gets put to the right user. but When I use another client and it's relayed by (for example google) I get this error back: Relaying denied. Proper authentication required. (state 14). What setting did I forget? Any config files I need to post so you can help me? I use CentOS 5.5 and the latest sendmail rpm

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• How Do I enable Safe Asynchronous Write With NFS?

  - by Joe Swanson

  The NFSv3 documentation talks alot about the concept of "safe asynchronous writes" (last bullet of A1): http://nfs.sourceforge.net/#section_a This is NOT referring to the sync/async option in the server exports file (as the async option in the exports file is NOT safe). As I understand it, safe asynchronous writes is a hybrid between the sync/async exports option. It allows for a server to reply back without flushing to stable storage immediately, but the client will not remove the write request from cache until it has received confirmation that it has been committed to stable storage (and also detects if the server looses power/reboots). I believe that this option is set on the client side, but I have not come across any documentation that shows how to do this. Any ideas?

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• What editor/viewer to use to inspect large text based files?

  - by Turismo

  Are there any text editors/viewers (preferably on windows but other platforms are also ok) that can handle files of 500 MB or more? The editors I checked so far (Notepad++, Notepad, Eclipse) all choked on files of that size. Edit: Many thanks for the great suggestions. I tried gvim as it was the top voted and was available on Windows. I opened the file in a reasonable time. After that scrolling and searching was very smooth as long as syntax highlighting was turned off. From the other editors mentioned TextPad and EmEditor both claim to be able to handle large files very well. EmEditor seems to be built exactly for editing large files. I'll probably try both and report back.

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• To program in free time as a programmer, is to show that programming is passion. If not, is the programmer good? [closed]

  - by SonofWatson

  Possible Duplicate: I don't program in my spare time. Does that make me a bad developer? A lot of blogs and advice on the web seem to suggest that in order to become a great developer, doing just your day job is not enough. For example, you should contribute to open source projects in your spare time, write smartphone apps, etc. In fact a lot of this advice seems to suggest that if you don't love programming enough to do it all day long then you're probably in the wrong career. That doesn't ring true with me. I enjoy my work, but when I come home from the office I'm not in the mood to jump straight back onto the computer and start coding away until bedtime. I only have a certain number of hours free time each day, and I'd rather spend them on other hobbies, seeing friends or going outside than in front of the computer. I do get a kick out of programming, and do hack around outside of work occasionally. I'm committed to my personal development and spend time reading tech blogs and books as a way to keep learning and becoming better. But that doesn't extend so far as to my wanting to use all my spare time for coding. Does this mean I'm not a 'true' software developer at heart? Is it possible to become a good software developer without doing extra outside your job? I'd be very interested to hear what you think.

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• Pushing image changes to multiple servers

  - by gms8994

  I need the ability to push images out to multiple servers whenever they're updated. I've looked at Network Filesystems, but they're all but worthless due to their speed. Images can be uploaded to any one of 3 servers, and would then need to be copied to the other 2. Any suggestions? I'm open to try just about anything. EDIT: Graphics data (jpg, gif, png, etc). Linux only. We're currently using rsync. But having it work back and forth is getting cumbersome. It's all local network.

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• How much sense does it make for a veteran .Net developer to move to ROR professionally?

  - by SharePoint Newbie

  Hi, I consider myself a moderately skilled (definitely not stupid) .Net developer. Over the past 5 years I've been working with ASP.Net, ASP.Net MVC, SharePoint, WPF, Silverlight, RDBMS (SQL Server and Oracle). I maintain/contribute a couple of .Net OSS. I've also picked up F# and Haskell over the previous year. I am currently employed at one of the better (best) software firms out there and would surely love to continue working here. However over the past 6 months opportunities in .Net have mostly dried up and all new work is headed towards ROR (and whatever is left towards Java). I have never been apprehensive about learning a new stack/language for fun and have previously picked up Haskell and Python in my free time. I am however apprehensive as to what impact moving to a new entirely different stack would have on my career. What would you do: Change jobs if you don't find anything on .Net soon. Try out the ROR stack for some time. If you find that its not your cup of tea, move back. (How would this impact my career and job opportunities in the longer run?) Also it would be very helpful if there are any ASP.Net MVC folks who have switched over to ROR professionally who can share their experiences. Edit: I have not done any development on a *nix box before. I've however used Ubuntu for fun and games. Sorry if this sounds subjective.

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• What's a worthwhile test for a new HD?

  - by Michael Kohne

  I work for a company that uses standard 2.5" SATA HD's in our product. We presently test them by running the Linux 'badblocks -w' command on them when we get them - but they are 160 gig drives, so that takes like 5 hours (we boot parted magic onto a PC to do the scan). We don't actually build that many systems at a time, so this doable, but seriously annoying. Is there any research or anecdotal evidence on what a good incoming test for a hard drive should be? I'm thinking that we should just wipe them with all zeros, write out our image, and do a full drive read back. That would end up being only about 1 hour 45 minutes total. Given that drives do block remapping on their own, would what I've proposed show up any infant mortality just as well as running badblocks?

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• Windows 7 doesn't recognize DVD drive

  - by adrianboimvaser

  I reinstalled Windows 7 (x64) because DVD drive stoped being recognized. At first it worked, I even got to burn a dvd. Some time later it misteriously dissapeared again. This question has been asked and answered many times on the Internet, but no proposed solution works for me. Please help! Any clues are gratefuly accepted! EDIT: I booted a live CD and succesfuly tried to burn a DVD. When I rebooted back to windows 7 the DVD drive was there. I burnt another DVD and it also works... I don't know how much it's gonna last... The drive is a TSSTcorp CDDVDW TS-L632H. FW Revision: HS02. It's parallel ATA.

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• Sharing a Win7 Mappable Network Drive in Server 2008 R2

  - by Jason

  I have a ghetto windows server 2008 r2 server that I basically run as a file server. I would like to create a share that can be mapped as a network drive by a Windows 7 Pro PC. How can I do this? I've gathered that I probably need to setup a VPN network on my Server 2008 R2 box and then grant my Win7 PC access. Is there anything else I am overlooking or is there a better way to do this? I basically just want to be able to edit xml files on my Win7 PC without having to ftp them back and forth.

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• Win 7: How can I resize a window to make it much bigger than my screen?

  - by RexE

  I have a window that I'd like to make much bigger than my physical screen (explanation of why below). I hit Alt+Space, M, and then press the Up arrow to move the title bar above the physical top of my screen. However, when I press Enter to set it, the title bar snaps back to the top of my screen. How can I prevent this from happening? Background: I want to get a hi-res image of a neighborhood map so that it can be printed to a poster. Google Earth has a "Save as JPG" feature, which will save the map in the window to a file. The bigger the window, the bigger the JPG; so, I'm trying to make the window as big as I can. Alternate suggestions welcome.

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• Monitor does not turn on until reset

  - by eggonlegs

  I have a system with an ATI 4870 hooked up to a Samsung P2350 using DVI. My motherboard is a GA-EP45 DS4P with the latest BIOS. The situation is: I turn on my PC (with the power switch) I get a blank screen I hit reset and the PC boots up normally, i.e. the monitor turns on and This has been the case for a couple of months (Was away for a while, came back and it was the same case). I was hoping the situation would somehow fix itself but alas, nothing. I have tried numerous settings in the BIOS (Combinations of different settings of the ACPI and power saving options) and have tried different cables. Has anyone experienced this before? I don't know where to go from here. It is pretty infuriating because it means I can't put my computer to sleep, as the monitor won't come on. Any help is appreciated. Thanks

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• iSCSI drives suddenly inaccessible or corrupted

  - by Hammer1

  I have two NAS (Seagate Black Armors) connected to our network through iSCSI to a Dell Optiplex 760 running 32-bit Windows 7 and Windows iSCSI Initiator. For some unknown reason within the last week both are reportedly inaccessible and/or corrupt (that is the error message generated when I attempt to open the on the iSCSI computer). However, connecting to either of them via direct IP goes off without a hitch. I've tried Error checking but received "The disk check could not be performed because Windows could not access the disk." I've tried System Recover to a date almost two weeks back thinking Windows update may have caused the issue but there is no change. Anyone have an explanation and/or a solution to get them reconnected? Thanks.

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