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  • Can I use a cheap inverter for my laptop?

    - by Georg
    I'm going to travel in a car this summer. It would be very nice if I could charge my laptop using the cigarette lighter. Because my computer is from Apple, there's no way to directly connect the two, therefore I need an inverter that provides 120V alternating current. There are many different models, ranging from very cheap to really expensive. The wave forms are: (from most expensive to cheapest) sine modified sine trapezoid square Can I use just any inverter or does it have to be a sine inverter? If so, what happens to my computer in case I use the wrong one. The laptop is a MacBook witch needs 60W.

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  • Problem with missing JSON functions on PHP 5.2.6 / Plesk 8.4

    - by Drachenviech
    I have a vserver running openSuse 10.3, Apache 2 and Plesk 8.4. I can update/upgrade neither, as it is apparently not recommended to upgrade openSuse 10.3 (and an update to the EOL 10.4 does not seem to make much sense) and Plesk fails to update no matter what version I try (even fails to upgrade to 8.4.1). Still I can live with that somehow, primarily because I don’t have the time to do a fresh remote install on the vserver. What really is a problem is, that though the installed PHP is 5.2.6 it has no zip library and no json functions. The first is probably because PHP was not compiled with --enable-zip. The second is a big mystery though. As I understand it, it always comes with PHP unless its compiled with the --disable-json configure option. This is however not the case. And the json extension module is just not there. I even tried to enable it with extension=json.so with no luck either. the configure options of my PHP are (as shipped with Plesk 8.4) '../configure' '--prefix=/usr' '--datadir=/usr/share/php5' '--mandir=/usr/share/man' '--bindir=/usr/bin' '--with-libdir=lib' '--includedir=/usr/include' '--sysconfdir=/etc/php5/apache2' '--with-config-file-path=/etc/php5/apache2' '--with-config-file-scan-dir=/etc/php5/conf.d' '--enable-libxml' '--enable-session' '--with-mm' '--with-pcre-regex=/usr' '--enable-xml' '--enable-simplexml' '--enable-spl' '--enable-filter' '--disable-debug' '--enable-inline-optimization' '--disable-rpath' '--disable-static' '--enable-shared' '--program-suffix=5' '--with-pic' '--with-gnu-ld' '--with-system-tzdata=/usr/share/zoneinfo' '--with-apxs2=/usr/sbin/apxs2' '--disable-all' '--disable-cli' As I understand it, PECL is not an option with 5.2.6. Or am I mistaken? Even if I was not, the openSuse repository only goes as far as PHP 5.2.4. The openSuse install even came without zypper, which I had to manually install. So is there a way to get ziplib and json running in PHP 5.2.6 without having to recompile the binary?

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  • Broken Package on Update Manager

    - by Widy Graycloud
    I dont know what's wrong with my update manager.. It says that the softwares that I installed was broken. Maybe because I force shutdown my laptop, because Ubuntu wont shutdown,showing up desktop wallpaper but not title bar and launcher, but It won't shut down (+that's another bug). I've just update the broken softwares. the size is 60 to 70 MB.. But It doesn't work. Now I cannot update or install any software from Update Manager or Ubuntu Software Center. Can anybody tellme what's wrong? This is what appears when I use Update Manager I use Ubuntu Software Center, and this message appeared I chose repair and when it update the broken softwares using Ubuntu Software Center. It failed. And show up this message. The problem is I can't update or install any program from Ubuntu Software Center and Device Manager anymore. (I closed allprograms include ubuntu software center,and device manager in this case). Some one helpme? I tried to use apt-get install -f in terminal but it shows message like this: E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

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  • With the outcome of the Oracle vs Google trial, does that mean Mono is now safe from Microsoft [closed]

    - by Evan Plaice
    According to the an article on ArsTechnica the judge of the case ruled that APIs are not patent-able. He referred to the structure of modules/methods/classes/functions as being like libraries/books/chapters. To patent an API would be putting a patent on thought itself. It's the internal implementations that really matter. With that in mind, Mono (C# clone for Linux/Mac) has always been viewed tentatively because, even though C# and the CLI are ECMA standards, Microsoft holds a patent on the technology. Microsoft holds a covenant not to sue open source developers based on their patents but has maintained the ability to pull the plug on the Mono development team if they felt the project was a threat. With the recent ruling, is Mono finally out of the woods. A firm precedent has been established that patents can't be applied to APIs. From what I understand, none of the Mono implementation is copied verbatim, only the API structure and functionality. It's a topic I have been personally interested in for years now as I have spent a lot of time developing cross-platform C# libraries in MonoDevelop. I acknowledge that this is a controversial topic, if you have opinions that's what commenting is for. Try to keep the answers factual and based on established sources.

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  • Ubuntu hang, and cannot be soft-reset after resuming from stand by mode

    - by Phuong Nguyen
    I have downgrade my xorg drivers, so I can hibernate and stand by my ubuntu smoothly. However, in some case, there's a problem. My ubuntu get hang. When I tried to switch to console mode (Ctrl+Alt+F1), then I cannot login. The system always reply with an error whenever I tried to press a key. When I press Ctrl+Alt+Del to perform a softreset, here what's it said: [80141.320122] end_request: I/O error, dev sda, sector 193687181 init: control-alt-delete main process (5660) terminated with status 2. This error is not even recorded in syslog. I guess this should be a problem with my hard disk since it said something about a bad sector. Exactly, what kind of error is this?

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  • How to troubleshoot if a zip file is valid or if it is big file size to be unzipped ?

    - by mireille raad
    Hello , I am trying to unzip a file with the size of 2GB I am getting the following error : unzip CLTE_C_08.zip Archive: CLTE_C_08.zip End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this archive. unzip: cannot find zipfile directory in one of CLTE_C_08.zip or CLTE_C_08.zip.zip, and cannot find CLTE_C_08.zip.ZIP, period. After some googling, some people say that this error is because the file is too big, others say because file is corrupt, others say that it could be a not unix archive. So my question , how to find out if file is valid archive file on my Centos and what is the command/trick to uncompress big files ( if any ) Thanks in advance :)

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  • Who can change the View in MVC?

    - by Luke
    I'm working on a thick client graph displaying and manipulation application. I'm trying to apply the MVC pattern to our 3D visualization component. Here is what I have for the Model, View, and Controller: Model - The graph and it's metadata. This includes vertices, edges, and the attributes of each. It does not contain position information, icons, colors, or anything display related. View - This would commonly be called a scene graph. It includes the 3D display information, texture information, color information, and anything else that is related specifically to the visualization of the model. Controller - The controller takes the view and displays it in a Window using OpenGL (but it could potentially be any 3D graphics package). The application has various "layouts" that change the position of the vertices in the display. For instance, one layout may arrange the vertices in a circle. Is it common for these layouts to access and change the view directly? Should they go through the Controller to access the View? If they go through the Controller, should they just ask for direct access to the View or should each change go through the controller? I realize this is a bit different from the standard MVC example where there a finite number of Views. In this case, the View can change in an infinite number of ways. Perhaps I'm shattering some basic principle of MVC here. Thanks in advance!

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  • Does Windows Move command delete the file only on successful completion?

    - by IronicMuffin
    This may be a stupid question, but I'm erring on the side of caution here. If I'm using Windows command line/batch files to Move a file from one server to another and we have a network failure, what will happen to the original file? I would assume it remains untouched until fully moved, and then deleted, but I need to be sure. My fear is that it deletes bytes as they are moved, which would be bad. If that isn't the case, is there a better way than Copying the file and Deleting after the copy completes? Thanks for your help. EDIT: I suppose super user would have been better. This is part of a job kicked off by code, so my first thought was to come here.

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  • Lucene best practice

    - by Dragos
    I am trying to understand how Lucene should be used. From what I have read, creating an IndexReader is costly, so using a Search Manager shoulg be the right choice. However, a SearchManager should be produced by a NRTManager(which, by the way, should replace the IndexWriter for every add or delete operation performed). But in order to have a NRTManager, I should first have an IndexWriter, and here comes my problem. The documentation says: an IndexWriter is thread-safe the constructor of this class takes a Directory object, so it seems creating an instace should be costly(as in the case of an IndexReader) all changes are buffered and flushed periodically(so they seem to encourage using a single instance) but: the changes, although flushed will only be visible after commit or close after finished making updates(add/delete), the instance should be closed I also found this: http://stackoverflow.com/questions/5374419/forgot-to-close-the-lucene-indexwriter-after-adding-documents-to-the-index where it is said that not closing a writer might ruin everything So what am I really supposed to do? Is having a single IndexWriter instance a good idea(make only commit and never close it)? EDIT: What is more, if I use NRTManager, how can I make acommit`? Is it even possible?

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  • Why is my ethernet interface in promiscuous mode

    - by nhed
    I read that seeing a flag of M in netstat -i is the way to tell which of your interfaces is in promiscuous mode I run it and I see that eth1 is in promiscuous mode $ netstat -i Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth1 1500 0 1770161198 0 0 0 57446481 0 0 0 BMRU lo 16436 0 97501566 0 0 0 97501566 0 0 0 LRU This seems to be the case on all the machines I checked (All Centos6.0, both virtual and physical), any idea why ethernet devices would be in such a mode unless someone was running any pcap based app (sudo lsof | grep pcap shows nothing)? I did not see any mention of promiscuous in any of the config files (sudo grep -r promis /etc) Any ideas what puts the interface into that mode and why? p.s. most of the posts I see seem to be security related, this is not that

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  • Problems dualbooting Ubuntu because of UEFI

    - by Koffeehaus
    I have an X-series Asus laptop which I just bough about a month ago. I want to dualboot Ubuntu - Windows. I can easily access LiveUSB with both UEFI enabled and disabled. I heard that there were problems with UEFI, so I disabled it. After I've installed the system I couldn't access it. It just boots to Windows straight. Another unusual thing, that never happened to me before was that the partition editor wanted me to create a BIOS reserved area, which I did, but not at the beginning of the table. Any ideas how to access the Ubuntu partition? As far as I can guess both Windows and Ubuntu have to be both of the same type of boot, either Legacy or EFI. This is not the case of what I have now. So, if I reinstall Ubuntu in UEFI mode that correlates with my Windows type, will I then be able to boot into it? I have a constraint, my laptop doesn't have a CD ROM, so I cannot reinstall WIndows, nor can I move around the Windows recovery partition. This is the boot-repair report : http://paste.ubuntu.com/1354254/

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  • Will having multiple domains improve my seo?

    - by Anonymous12345
    Lets say I have a domain already, for example www.automobile4u.com (not mine), with a website fully running and all. The title of my "Website" says: <title>Used cars - buy and sell your used cars here</title> Also, lets say I have fully SEO the website so when people searching for the term buy used cars, I end up on the second or first page. Now, I want to end up higher, so I go to the google adwords page where you can check how many searches are made on specific terms. Lets say the term "used cars" has 20 million searches each month. Here comes the question, could I just go and buy that domain with the search terms adress, in this case www.usedcars.com and make a redirect to my original page, and this way when people search for "used cars", my newly bought domain name comes up redirecting people to my original website (www.automobile4u.com)? The reason I believe this benefits me is because it seems search engines first of all check website adresses matching the search, so the query "used cars" would automatically bring www.usedcars.com to the first result right? What are the downsides for this? I already know about google spiders not liking redirects, but there are many methods of redirecting... Is this a good idea generally?

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  • FOSS Development: Who develops the OS-specific packages?

    - by achristi
    I have a couple of FOSS projects. They can be a bit of a pain to get running unless you've got dependencies in place already, which I figure is par for the course for FOSS projects. We know that each free operating system out there has its own package management systems. A few of them, such as homebrew on Mac OS or AUR on Arch linux are very friendly to community contributions. What I am wondering is, who exactly is expected to contribute packages? Primarily I am concerned with the case of small or developing projects, since it's pretty standard for the big projects to be put in there by the OS maintainers. From my perspective, it is something of a chicken-egg problem, because your software will not make its way into a package system if it does not have users, and it is less likely to gain users if it is not easy to install and use. For the sake of discussion, let's assume that the software in question is actually legitimately useful. I can see where people could create crapware or spam and that should obviously be kept out of any package system. So, in summary, whose job is this? Is it spammy for a FOSS software dev to put his own work into various OS package repositories?

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  • Where can I find details on installing and using Solr on Tomcat using the solr-common and solr-tomcat packages?

    - by danieltalsky
    I'm seeing lots of Solr/Tomcat installation instructions, but all of them install at least one of these packages from source. Since there's tomcat6, solr-common, and solr-tomcat packages (in Ubuntu 10.4), I'd love to use them, but I can't find any kind of documentation on installing using them. I can't even tell what directory solr is stored in. I get a "Welcome to Solr!" page at http://localhost:8080/solr/, but have no idea where the catalina home is, or where the solr configuration files are in this case. Can anyone point me to documentation?

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  • BizTalk Schema Validation

    - by Christopher House
    Perhaps this one should be filed under:  Obvious Yesterday I created a new schema that is going to be used for a WCF receive.  The schema has a bunch of restrictions in it, with the intention that we'd validate incoming messages against the schema.  I'd never done message validation with BizTalk but I knew the XmlDisassembler component had an option for validating, so I figured it would be a piece of cake.  Sadly, that was not to be the case.  I deployed my artifacts and configured my receive location's XmlDisassembler with what I thought to be the correct document spec name.  I entered My.Project.Name.SchemaTypeName for the document spec and started running unit tests.  All of them failed with the following error logged in the event log: "WcfReceivePort_BizTalkWcfService/PurchaseOrderService" URI: "/BizTalkWcfService/PurchaseOrderService.svc" Reason: No Disassemble stage components can recognize the data. I went to the receive port and turned on tracking, submitted another message, then went to the admin console and saved the message.  It looked correct, but just to be sure, I manually validated it against the schema in my project.  As expected, it validated correctly. After a bit of thinking on this, I realized that I probably needed to fully qualify my document spec name, meaning, include the assembly name, as well as the type name.  So, I went back to the receive location and changed the document spec to: My.Project.Name.SchemaTypeName, My.Project.Name,Version=1.0.0.0, Culture=neutral, PublicKeyToken=xxxxxxxxx I re-ran my unit tests and everything was working as expected.  So, note to self:  remember to include the assembly name when setting the document spec.  If you need an easy way to determine your schema name and assembly name, find your schema in the admin console and go to it's properties.  On the property screen, look at the Name and Assembly properties.  Your document spec will be "SchemaName, AssemblyName"

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  • LVM, Soft RAID1, and Replication?

    - by mtkoan
    Hi all, I am practicing putting together a HA file server. It is a linux server with 2 1.5TB Hard drives. My plan is to use LVM to manage the physical volumes into logical volumes for /, /home, and /var. Then use md (soft RAID 1) to mirror the image onto the second HDD, THEN use DRDB to mirror the entire setup another server. Is this overkill? Would I just be okay with just md and DRDB? The system will serve user's homedirs (~100) and probably some groupware or other local intranet. On my own machines I've always separated root and /home partitions in case I break something, I can easily reinstall the OS. Should I follow that same theory here? If so I need LVM, because I really can't predict where we'll need more space, /var or /home.

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  • Converting NTFS to ZFS (or other)

    - by NumberFour
    Are there any benefits of converting HDDs that are running NTFS on a Linux machine to ZFS? Is there a way to do such conversion in Linux without losing the data? What about the stability of ZFS on Linux, does FUSE really work well in this case? People say that the only way to get the real full ZFS support is to install Solaris. I understand that the best choice for Linux would be ext4, but I really havent found a way how to convert to ext4 from NTFS without sacrificing all the data. On the other hand I have doubts whether changing from NTFS to ZFS while using Linux is really wise. Thanks for any tips.

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  • In vim, prevent caret moving back when I leave edit mode?

    - by romkyns
    In vim, if I enter and leave edit mode without doing anything, the caret ends up one character to the left. And if I enter and leave append mode, the caret moves forwards and then backwards. Any way to configure vim to leave the caret alone in these cases? Ideally I just want to always enter append mode, but without moving the caret when I enter or exit the mode. (Currently I usually use insert mode because it doesn't mess up my caret position upon entry. That is, except when I need to append to the end of the line, in which case I swear at vim for behaving in such an archaic fashion, press Esc and enter append mode.)

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  • Failure Driven Development

    - by DevSolo
    At our shop, we strive to be agile. And I'd say we are making great strides. That said, a few of us have spotted a pattern we have started calling "Failure Driven Development". Failure Driven Development can basically be desribed as an agile release/iteration cycle where the bugs/features are guided not by tasks and stories with acceptance criteria, but with defects entered in the defect tracking software. Our team has a great Project Manager who strives to get the acceptance criteria from the customer(s), but it's not always possible. From my development chair, this is due to the customer either not knowing exactly what they want or (and this is the kicker) two different "camps" at the customer's main office conflict with how a story should be implemented. Camp A will losely dictate that Feature X works like this, then Camp B will fail it due not functioning like that. Hence, the term "FDD". The process is driven by "failures". This leads to my question: Has anyone else encountered this and if so, any tips/suggestions for dealing with it? We have, of course, tried to get Camp A and B to agree prior, but everyone knows this isn't always the case. 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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  • Does Win 7 still requires copying all files over before burning to a DVD-R or BD-R?

    - by Jian Lin
    It seems that Win 7 still needs to copy all files over to a folder, before it burns all files to the DVD-R or BD-R? I think since XP or Vista, Windows always copy everything over to a temporary folder before it will burn to an empty DVD-R. So if you just want to burn a 4GB file to an empty DVD-R, it will first make a copy of that file, and then burn it, instead of just burning it without making a copy first. And now on Win 7, it seems like it is the case also? Most other 3rd party burning tools won't make an extra copy of the files first... Win 7 is the exception. Is there a way around it? (to avoid copying over 25GB or 50GB of data before burning)

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  • Webpage / Other application does not fit fully on screen

    - by Frank Levebre
    I have an ASUS Eee PC 1008 HA The problem is that I have to move the cursor up/down in order to see the start control / icons at the bottom of the screen and the cursor up in order to see the menu bar / etc at the top of the screen, ie the whole page does not fit on the screen anymore. It has nothing to do with the zoom % in the bottom right hand corner. This also is the case whatever application I am running, ie Internet explorer , word, excel or whatever. Does anybody have an idea what is the problem and how I can resolve this?

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  • HCM is Alive and Well in APAC

    - by Row Henson
    I just returned from a 5 country tour on “Rethinking HR” where Oracle hosted breakfast and lunch executive seminars to the most senior HR practitioners in 5 cities in these major markets in APAC. While I have done many of these “road shows” in the past, I was most impressed with the response we received during this trip. I’m sure the execution of our marketing and sales teams had lots to do with the turnout, but I’d also like to think that this region is primed for applications that help with the talent dilemma faced by many organizations today in this part of the world and are excited about the offerings Oracle provides to help our customers attract, develop, retain and analyze their human capital. For these type of events, we normally expect 25-30 companies in attendance with a drop-off rate of around 15%. In all 5 cities, we had standing room only with an average attendance of 50 people from 30+ companies. Interestingly enough, in 3 of the 5 cities we had people show up that were turned down during registration, for lack of room – so we actually exceeded our registration. This was the case in Canberra – Australia’s capital – with over 70 attendees. Unusual indeed! During my presentation I referenced several studies which highlight how this region is primed for support in looking at talent in the future as high growth creates talent shortages and talented workers see opportunities outside of their current employers. A Deloitte study shows that 61% of respondents in APAC expect significant or moderate talent shortages over the next year (compared to 45% and 31% for the Americas and EMEA respectively). Please accept my thanks to all who arranged and orchestrated this time in APAC. While my body was quite tired from the hectic schedule, my mind was energized with the interest and interaction.

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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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  • External display resolution issue

    - by Steven
    I'm new to Ubuntu. I've 'dabbled' in the past but Windows was annoying me too much so I finally made the change. One thing I use my laptop for is outputting the screen onto an external monitor. In Windows this usually works fine (but when there is an issue, it's a pain to resolve and has crashed my computer on many occasions). In Ubuntu it's a very simple case of "plug and play" because it displays the content immediately with no major problems. However, I can only alter the resolution of the external display to 4:3 formats, whereas the external monitor is 16:9, so the picture is stretched. In Windows there's loads of resolutions to choose from. If I disable the laptop's screen, it still doesn't allow me to display the correct resolution externally (on VGA). Further to that, if I close the laptop it keeps the external screen as it is, but when I reopen the laptop, the laptop screen doesn't turn back on until I restart. If it's a video I am watching, I can use VLC to alter the aspect ratio so the video looks fine, but it's quite an annoying work around. I used terminal to find my graphics controller, which is "Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)" (not great, I know... the laptop was a free gift with my mobile!) Any idea of how I can get the resolution on the external monitor to be correct?

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