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  • Read only file system error on ubuntu after partitioning

    - by Ranjith R
    I am not sure if I am the root cause of this problem but this is what I did: I wanted latest ubuntu and latest linux mint together on my thinkpad laptop. Windows 7 was already there. I already had mint. So I put in the USB with ubuntu image and started installing ubuntu. I chose to install side by side. It was taking a long time to finish defragmenting and partitioning. I decided to give up as I became a little impatient and I pressed the skip button. After the skipping, I realized that the partitioning was complete and went ahead with installing ubuntu. Now the linux mint OS starts reporting the file system as read only at least once every day and I have restart and tell the OS to fix errors in hard disk. After I press F key, the system fixes the issues, restarts and all is well again. Is there some way to fix the issue permanently. I think reinstalling will solve the issues, but I can not do it as I have a lot of data and I will have reinstall and configure a lot of softwares that I use daily. I checked the smart check in disk utility and the hard disk seems to be fine Also I checked both the partitions for errors with disk utility and the report says they are fine. Is there something I can do before I reinstall?

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  • Designing spawning system

    - by Vlad
    I played this game recently http://www.kongregate.com/games/JuicyBeast/knightmare-tower and I am amazed by the way how different monsters are beign spawned. I personally developed my own shooter game and I added time based but also count based spawing system. By count based I mean when there are 5 enemies on stage stop spawning. But this is one example. My question is how are these spawning mechanism built, is there some pattern or some theory how they are built? Are there some online materials/pages where I can improve my knowledge? To sumarize, let just say we have 6 types of monsters. I start the game and kill of monsters of type 1,2 and 3 all the time. Once I pass the first ceiling, like in the game above, monster type 4 appear. ANd so on. As I progress trough the game, the same system of 6 types of monsters stay, but they become more and more resilient and dangerous. So I must also improve to be able to destroy the same monsters but now stronger. My question is simple, are there some theories built or written for developing this type of inteligent systems? Note: This is a general question, not tied up with some game or how exactly should the game work. I am capable to program my own mechanisms but I think I need some help. Thanks.

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  • Hide icons encrypted file system partitions in Nautilus

    - by Eddy Pronk
    I've installed Ubuntu 10.04 from the alternate CD. It has an encrypted root and swap partition. The root partition is visible in Nautilus as 'File Syste' icon. There is another icon "216 GB Filesystem". If I click it says: Unable to mount 216 GB Filesystem. /dev/mapper/sda5_crypt is mounted. Then there is another icon "6.1 GB Swap Space". If I click it it says: Unable to mount 6.1 GB Swap Space. Not a mountable file system. How can I hide these last two icons? Partition layout: $ sudo fdisk -l /dev/sda [sudo] password for eddyp: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xa6e92df4 Device Boot Start End Blocks Id System /dev/sda1 1 11749 94373811 7 HPFS/NTFS /dev/sda2 11871 38914 217219073 5 Extended /dev/sda3 * 11750 11871 976896 83 Linux /dev/sda5 11871 38167 211220480 83 Linux /dev/sda6 38167 38914 5997568 83 Linux Partition table entries are not in disk order Mounted as: $ mount /dev/mapper/sda5_crypt on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) none on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) none on /dev type devtmpfs (rw,mode=0755) none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) none on /dev/shm type tmpfs (rw,nosuid,nodev) none on /var/run type tmpfs (rw,nosuid,mode=0755) none on /var/lock type tmpfs (rw,noexec,nosuid,nodev) none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) /dev/sda3 on /boot type ext4 (rw) binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev) gvfs-fuse-daemon on /home/eddyp/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=eddyp) /dev/sda1 on /media/S3A6595D003 type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions)

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  • Prevent Click Fraud in Advertisement system with PHP and Javascript

    - by CodeDevelopr
    I would like to build an Advertising project with PHP, MySQL, and Javascript. I am talking about something like... Google Adsense BuySellAds.com Any other advertising platform My question is mainly, what do I need to look out for to prevent people cheating the system and any other issues I may encounter? My design concept. An Advertisement is a record in the Database, when a page is loaded, using Javascript, it calls my server which in turn will use a PHP script to query the Database and get a random Advertisement. (It may do kore like get an ad based on demographics or other criteria as well) The PHP script will then return the Advertisement to the server/website that is calling it and show it on the page as an Image that will have a special tracking link. I will need to... Count all impressions (when the Advertisement is shown on the page) Count all clicks on the Advertisement link Count all Unique clicks on the Advertisement link My question is purely on the query and displaying of the Advertisement and nothing to do with the administration side. If there is ever money involved with my Advertisement buying/selling of adspace, then the stats need to be accurate and make sure people can't easily cheat the system. Is tracking IP address really the only way to try to prevent click fraud? I am hoping someone with some experience can clarify I am on the right track? As well as give me any advice, tips, or anything else I should know about doing something like this?

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  • Standard Network Tiers in a Distributed N-Tier System

    Distributed N-Tier client/server architecture allows for segments of an application to be broken up and distributed across multiple locations on a network.  Listed below are standard tiers in a Distributed N-Tier System. End-User Client Tier The End-User Client is responsible for sending and receiving requests from web servers and other applications servers and translating the responses so that the End-User can interpret the data effectively. The primary roles for this tier are to communicate with servers and translate server responses back to the end-user to interpret. Business-Specific Functions Validate Data Display Data Send Data to Webserver Web Server Tier The Web server tier processes new requests for information coming in from the HTTP and HTTPS ports. This primarily handles the generation of user interfaces and calls the application server when needed to access Data and business logic when needed. Business-specific functions Send Data to application server Format Data for Display Validate Data Application Server Tier The application server stores and executes predefined business logic that is applied to various pieces of data as the business determines. The processed data is then returned back to the Webserver. Additionally, this server directly calls the database to obtain and store any data used by the system Business-Specific Functions Validate Data Process Data Send Data to Database Server Database Server Tier The Database Server is responsible for storing and returning all data need by the calling applications. The primary role for this this server is storage. Data is stored as needed and can be recalled at any point later in time. Business-Specific Functions Insert Data Delete Data Return Data to Application Server

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  • Operating System not Found after installing Ubuntu in a Sony Vaio

    - by diego8arock
    I just bought a Sony Vaio SVS15115FLB that came with Windows 7, after enjoying the PC graphic power for a little, I decided it was time to install Ubuntu 12.04. First, I inserted a USB stick, reboot, press F11 but a message saying that no OS was found on the USB, so then I used a live CD. It booted fine and I installed Ubuntu, then when it was time to restart the PC, it didn't boot to GRUB but it went straight to Windows and it began an startup error and was looking for a solution, after it was done, it restarted and then it booted again to Windows and to the same start up error solution thing. I freaked out, so I booted again the Ubuntu live CD, and installed Ubuntu over everything, after it installed I rebooted and then a message appeared saying Operating system Not Found, and I have no idea why. So I Googled again and found this post on Boot Partition, I did everything exactly on that post, but it didn't work (by the way, this was the message): The boot files of [Ubuntu 12.04 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, >200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. It appeared the first time, then I did it all again and then it was gone. I rebooted and nothing, the same Operating System not found message appeared. So I decided to create a partition for Windows, hoping for something, but the message still appears. I really have no idea what to do, but there is something odd, if I insert the USB stick containing Ubuntu 11.10, the message that says that there is no OS in the PendDrive flashes for a fraction of a second and the boot straight to Ubuntu 12.04 without problems (and booted to Windows when I installed it, ignoring Ubuntu), right now I'm using it like that, but its pretty annoying. Can anyone advise me how to fix this? I'm no expert on this kind of things (boot, GRUB, recovery and stuff like that).

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  • "Missing Operating System" after installing Ubuntu 12.04 from a CD on a Macbook Pro

    - by Pierre
    I followed this guide to install Ubuntu 12.04 on my Macbook Pro 8,2 (late 2011): https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation I used a CD. I synced the partition table on rEFIt, and it went fine. I do have an icon to boot on Linux, but when I launch it, after a few seconds I have "Missing Operating System" displayed, and that's all... How can I fix that? The only thing I see is, in the guide, it is mentioned this: On the last dialog of the installer, be sure to click the “Advanced” button and choose to install the boot loader (grub) to your root Ubuntu partition, for example /dev/sda3. This will be the only partition with the EXT4 file system. In Ubuntu 12.04 installation process, there is not such an option, but there is a dropdown menu to select where the grub bootloader should be installed. It was /dev/sda by default, but I selected my root Ubuntu partition (in my case, /dev/sda5). I got a warning message (but actually, it was the same warning message even when I selected /dev/sda), and I continued the installation... Thanks in advance for your help!

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  • How system services are started in 12.10?

    - by Salem
    One thing that always confused me in Ubuntu was how system services are started. I know that Ubuntu uses Upstart and supports SysV, but which one is used to start the services? This matters when you want a "manual" start for a service. For example, on my system i have files for the following services either in /etc/init.d/<service> (Upstart) and /etc/init/<service>.conf (SysV): acpid, mysql, networking, qemu-kvm, ufw, libvirt-bin So if i want to disable MySQL execution at startup, i must use the Upstart way or the SysV way to disable it? Also, how can i tell which of those is really used to start a generic service? Edit The really doubt here is not how disable/enable services using SysV/Upstart. What really confuses me is that some services seem to be defined (and enabled) in SysV and Upstart at the same time. Is there any precedence between them (like if mysql is enabled in both launch it using SysV)? Or can it be the case that one tool uses the other in background?

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  • Game Messaging System Design

    - by you786
    I'm making a simple game, and have decided to try to implement a messaging system. The system basically looks like this: Entity generates message - message is posted to global message queue - messageManager notifies every object of the new message through onMessageReceived(Message msg) - if object wants, it acts on the message. The way I'm making message objects is like this: //base message class, never actually instantiated abstract class Message{ Entity sender; } PlayerDiedMessage extends Message{ int livesLeft; } Now my SoundManagerEntity can do something like this in its onMessageReceived() method public void messageReceived(Message msg){ if(msg instanceof PlayerDiedMessage){ PlayerDiedMessage diedMessage = (PlayerDiedMessage) msg; if(diedMessage.livesLeft == 0) playSound(SOUND_DEATH); } } The pros to this approach: Very simple and easy to implement The message can contain as much as information as you want, because you can just create a new Message subclass that has whatever info necessary. The cons: I can't figure out how I can recycle Message objects to a object pool, unless I have a different pool for each subclass of Message. So I have lots and lots of object creation/memory allocation over time. Can't send a message to a specific recipient, but I haven't needed that yet in my game so I don't mind it too much. What am I missing here? There must be a better implementation or some idea that I'm missing.

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  • What relational database system should I learn? [closed]

    - by acidzombie24
    At the moment i know sqlite (my favorite), mysql (its ok, i get annoyed) and i do not want to learn ms/t sql (it only allows one nullable row if the column is unique). I am thinking about learning a new database system. My requirements for it is Must allow multiple connections at once (read and write) All or data i choose must be ACID compliant Performance should be good. I have a 17gb table in one project. It should perform well on read and transactional writes. With mysql it took hours to restore it and there were no foreign keys on that specific table. It only finished in a workday because i found a suggestion to adjust a setting which i think was key-buffer. And it still took hours Unique columns that allow more then one row to be null. I shouldn't have to say it but dammit MS. Allows one to make ongoing backups. Something like 'binary logs'. Some relatively small amounts of data i can grab and apply it to my local db to have it in sync with the one on the server. Table joins. I rather not write a bunch of queries to simulate a join What I would like but is not required Foreign keys. This may be a requirement later Open sourced Fair tool support. So i can measure queries, easily backup/restore, etc .NET and C (or C++) interface. (I seen one that uses raw tcp with JSON which was okish) Good subquery support. Once i was working with an older version of mysql (i believe <5.1 but it could have been 5.1) and i had to write many queries to do one query because it couldn't do subqueries. Or maybe it couldnt do it efficiently and died bc of memory limitations with a huge dataset. What db system should i learn?

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  • System in low graphics, deleted linux, grub rescue, can't access windows

    - by First timer
    So I'm pretty new to Ubuntu but I managed to install it with no big problems on both my desktop and netbook. When I installed it on my brother's netbook everything went horribly wrong and now I fear the system is close to beyond repair. The problem was first that it said it did not have any space left (seemed ridiculous since it had a lot). Then Ubuntu began booting into a "System is running in low graphics mode error" which I then tried to fix, using all the tips I could find in here but nothing helped. I think the graphics error and lack of space might have been related but I can't be sure. Finally I gave up repairing Ubuntu and went for a reinstall. Shouldn't have done that! I read that I should simply open Ubuntu through a live usb and choose GParted to delete the Linux partitions so I did and rebooted accordingly. Next, I was to install Ubuntu but now I am only given the option to wipe the whole disk for Ubuntu, not install along with windows 7. If I access GParted I can still see the ntfs partitions that hold windows 7 (there are 2: one labeled RECOVERY and another labeled OS and boot) so why can't I access them? Btw. the OS and boot has a little red mark with a warning that 1 cluster is referenced to multiple times, don't know what that means. If I boot without the live usb I am sent directly into a grub rescue "black screen of the computer will follow no orders". Please, I know that the easiest might be to simply wipe the whole thing clean but there are important files and programs on windows 7. Is there a way to just access windows? It is a dell inspiron 1018 mini netbook, so I have no cd input and no windows 7 installation cd.

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  • Ubuntu 3D does not work on Dell system with a AMD Radeon HD 6470M

    - by VeeKay
    I am running 64 bit Ubuntu on Dell with 1GB graphic card. I login with "Ubuntu" hoping to see Unity 3d but it doesn't. Unity 2D runs instead. when I type in echo "$DESKTOP_SESSION" it confirms the Unity-2D. I've checked the System info that shows like : The graphics row shows itself as empty. SO I've presumed that the graphic drivers aren't detected and hence I went to Unity- Additional Drivers and installed the fglrx driver that the UI has suggested. Even after installing so, the graphics part in System info details shows nothing and still Unity 2D runs in spite of all the effort. Please help! How can I get my Unity 3D back? Hardware Info Video Card : AMD Radeon™ HD 6470M - 1GB (For ICC) RAM : 6GB (1 X 2GB + 1 X 4GB) 2 DIMM DDR3 1333Mhz OS : 64 bit Ubuntu 11.10 Edit : Output for /usr/lib/nux/unity_support_test -p X Error of failed request: BadRequest (invalid request code or no such operation) Major opcode of failed request: 155 (GLX) Minor opcode of failed request: 19 (X_GLXQueryServerString) Serial number of failed request: 21 Current serial number in output stream: 21

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  • Upgraded from 11.4 to 11.10, There was an error, now the system won't initiialize

    - by Eric
    This morning the system gave me a message that my Version (11.4) was no longer supported, and I took the 'upgrade' option (- 11.10). While installing the various components I encountered a message to the effect that the there was an error and the system may have become unusable. Among the messges: E:Sup-process /usr/bin/dpkg received a segmentation fault...returned an error code (1). I was given an option to do several things, one of which seemed to mean that it would attempt to roll back to the previous version (the default), which I took. After the process ran it said the upgrade process had finished, but there were errors. I attempted to initialize a console so I could enter ubuntu-bug update-manager /var/log/dist-upgrade, per the instructions I received when I received the error message, but the console failed during initialization. I restarted the machine, and the screen has stopped with the following contents: * Starting bluetooth * Stopping save kernel messages * Starting CUPS printing spooler/server * PulseAudio configured per-user sessions saned disabled: edit /etc/default/saned $starting up Cisco VPN daemon *Starting anac(h)ronistic cron *Stopping anac(h)ronistic cron Each of these steps followed by [ OK ] What are my options? Any help appreciated!

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  • What is a Relational Database Management System (RDBMS)?

    A Relational Database Management System (RDBMS)  can also be called a traditional database that uses a Structured Query Language (SQL) to provide access to stored data while insuring the integrity of the data. The data is stored in a collection of tables that is defined by relationships between data items. In addition, data permitted to be joined in new relationships. Traditional databases primarily process data through transactions called transaction processing. Transaction processing is the methodology of grouping related business operations based predefined business events. An example of this can be seen when a person attempts to purchase an item from an online e-tailor. The business must execute specific operations for a related  business event. In this case, a business must store the following information: Customer Info, Order Info, Order Item Info, Customer Payment Data, Payment Results, and Current Order Status. Example: Pseudo SQL Operations needed for processing an online e-tailor sale. Insert Customer into Customers Insert New Order into Orders Insert Each New Order Item into OrderItems Insert Customer Payment Info into PaymentInfo Insert Payment Processing Result into PaymentDetails Update Customer for Current Order Status Common Relational Database Management System Microsoft SQL Server Microsoft Access Oracle MySQL DB2 It is important to note that no current RDBMS has fully implemented all of the Relational Principles. Common RDBMS Traits Volatile Data Supports Transaction Processing Optimized for Updates and Simple Queries 

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  • Ich bin jetzt Oracle Certified Associate!

    - by britta.wolf
    Jan Peuker, Absolvent der Hochschule Augsburg und University of Melbourne, hat vor kurzem das Zertifikat Oracle Database 10g Administrator Certified Associate erworben. Er hat uns netterweise mit diesem kleinen Text versorgt: "Die Oracle Zertifizierung beginnt üblicherweise mit dem Oracle Certified Associate. Für diese Zertifizierung ist noch keine tiefgehende Praxiserfahrung notwendig. Um den Titel des Oracle Database 11g Administrator Certified Associate zu erlangen, muss man eine Prüfung zu SQL (z.B. 1Z0-051) sowie eine Prüfung zur Administration (1Z0-045) ablegen. Beide Prüfungen dauern 2 Stunden und haben ca. 80 Fragen von denen etwa drei Viertel richtig beantwortet werden müssen, um zu bestehen. Eine Note gibt es nicht. Die Prüfungen finden immer elektronisch statt, die Software erlaubt das Überspringen und Markieren von Fragen. Während meiner Arbeitszeit nach meinem ersten Studium hatte ich häufig mit dem Oracle Datenbanksystem zu tun. Als ich mein Aufbaustudium an der University of Melbourne absolvierte, wurde mir von der Studienberaterin vorgeschlagen, den Kurs „Advanced Database Administration" zu belegen. Dieser beruht vollständig auf den offiziellen Oracle Trainings-Unterlagen zur Prüfung in Oracle Administration und erlaubt daher die Teilnahme an der offiziellen Zertifizierung. Im Gegensatz zur SQL Prüfung, deren Inhalt man sich gut selbst aneignen kann, hilft bei der Administrator-Zertifizierung ein echter Kurs mit Seminar ungemein. Viele Konzepte lassen sich schwer aus einem Buch lernen. Die Bestandteile der SGA oder das Anlegen von Benutzern mögen leicht zugänglich sein, Redo- und Undo-Management sowie Backup und Recovery kann man nur verstehen, wenn man Beispiele hat und diese an einem Testsystem (keine "kleine" XE-Datenbank, sondern eine "richtige" Datenbank mit Enterprise Manager) ausprobieren kann. Übermäßig viel Zeit habe ich keinesfalls investiert, weil das Grundsystem sehr logisch ist. Für die weniger nachvollziehbaren Bereiche, besonders die neuen Features, habe ich mir Fachbegriffe auf Lernkarten geschrieben und die Trainingsunterlagen am System durchgespielt. Die Prüfung war für mich überraschend schwer, weil das einfache "Tagesgeschäft" deutlich unterrepräsentiert ist. In den Multiple-Choice-Fragen werden viele Besonderheiten und Use-Cases abgefragt (online findet man viele Beispielfragen). Da beide Tests in Englisch sind, sollte man nicht nur in der Terminologie des Oracle Datenbanksystems sondern auch in Fachbegriffen der Datenbankwelt allgemein bewandert sein. Oft machen einzelne Wörter (z.B. redundant oder synchronized, redo log oder redo log buffer) die richtige Antwort aus, ein signifikanter Anteil der Fragen beruht auf Zeichnungen oder Diagrammen, die beschrieben werden müssen. So muss man z.B. anhand eines Log-Auszugs beurteilen, warum die Datenbank nicht sauber geschlossen wurde. Allgemeines Wissen über Datenbanksysteme hilft leider nicht viel, da überproportional viele Fragen zu Oracle-spezifischen Themen gestellt werden, wie z.B. Optimierungs-Dienste (ADDM), Flashback, SQL Loader und ein wenig PL/SQL. Die SQL Prüfung ist dagegen sehr geradlinig - was aber nicht einfacher heißt. Hier kommt es mehr auf Auswendiglernen von Syntax an, was mir persönlich nicht liegt. Vor allem als Anwendungsprogrammierer kennt man oft proprietäre SQL-Funktionen nicht, es fällt schwer, sich einzelne Datumsberechnungsfunktionen, Typkonvertierungen, Namespaces oder krude Join-Methoden zu merken. Auf all dies wird in der Prüfung aber sehr viel Wert gelegt. Auch hier wird man wieder mit zweideutigen Multiple-Choice Fragen konfrontiert, bei denen sich z.B. nur die Reihenfolge der Parameter unterscheidet. Zudem sind die Parameter auch nicht ausgeschrieben, sondern in einem Entity-Relationship-Diagramm gegeben, wobei man auf die richtigen Datentypen achten muss. Mir persönlich war die Zeit fast zu knapp bemessen, weil man bei vielen Fragen erst ein Diagramm, einen Datenauszug oder einen längeren Text lesen muss, um dann die richtigen Statements zu finden. Hier helfen Lernkarten also nur bedingt - stattdessen üben, üben, üben. Durch den relativ niedrigen Pass-Score von 70% kann man es sich leisten, unsichere Fragen zuerst zu überspringen und erst nachdem alle sicheren beantwortet sind, zu überdenken. Die Prüfung ist auf jeden Fall fair. Ich habe durch das Oracle-Zertifizierungsprogramm viel gelernt. Die Datenbanken unter meiner Aufsicht laufen deutlich performanter und liefern höhere Verfügbarkeit, weil ich Probleme eliminieren konnte, die mir vorher nicht klar waren. Eine klassische Misskonfiguration, volle Archive Logs, weil diese mit zu lange gehaltenem Flashback-Speicher kollidieren, konnte ich bereits in einer der ersten Stunden meines Kurses an der Uni Melbourne mit Hilfe meines Professors klären. Beide Prüfungen waren problemlos parallel zu anderen Prüfungen zu absolvieren. Empfehlen kann ich eine gründliche Online-Recherche aber auch die Oracle Press-Bücher, welche mit Prüfungsfragen am Ende jedes Kapitels aufwarten. So spart man sich Zeit und ist trotzdem gut vorbereitet. Auch wenn ich keine Laufbahn als Administrator einschlagen werde, bin ich froh die zugrundeliegende Technologie vieler Anwendungen besser zu verstehen. Für meine tägliche Arbeit als Anwendungsentwickler hat es mir vor allem geholfen, Oracle-Konzepte z.B. im Bereich der Transaktionssteuerung und Wiederherstellung zu verstehen und damit viele Open Source Produkte jetzt sinnvoller bewerten und empfehlen zu können." Eine Übersicht der Zertifizierungspfade finden Sie auf der Oracle University Webseite (dann einfach "Deutschland""auswählen und anschließend auf den Punkt "Zertifizierungen" klicken).

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  • How to Tell a Hardware Problem From a Software Problem

    - by Chris Hoffman
    Your computer seems to be malfunctioning — it’s slow, programs are crashing or Windows may be blue-screening. Is your computer’s hardware failing, or does it have a software problem that you can fix on your own? This can actually be a bit tricky to figure out. Hardware problems and software problems can lead to the same symptoms — for example, frequent blue screens of death may be caused by either software or hardware problems. Computer is Slow We’ve all heard the stories — someone’s computer slows down over time because they install too much software that runs at startup or it becomes infected with malware. The person concludes that their computer is slowing down because it’s old, so they replace it. But they’re wrong. If a computer is slowing down, it has a software problem that can be fixed. Hardware problems shouldn’t cause your computer to slow down. There are some rare exceptions to this — perhaps your CPU is overheating and it’s downclocking itself, running slower to stay cooler — but most slowness is caused by software issues. Blue Screens Modern versions of Windows are much more stable than older versions of Windows. When used with reliable hardware with well-programmed drivers, a typical Windows computer shouldn’t blue-screen at all. If you are encountering frequent blue screens of death, there’s a good chance your computer’s hardware is failing. Blue screens could also be caused by badly programmed hardware drivers, however. If you just installed or upgraded hardware drivers and blue screens start, try uninstalling the drivers or using system restore — there may be something wrong with the drivers. If you haven’t done anything with your drivers recently and blue screens start, there’s a very good chance you have a hardware problem. Computer Won’t Boot If your computer won’t boot, you could have either a software problem or a hardware problem. Is Windows attempting to boot and failing part-way through the boot process, or does the computer no longer recognize its hard drive or not power on at all? Consult our guide to troubleshooting boot problems for more information. When Hardware Starts to Fail… Here are some common components that can fail and the problems their failures may cause: Hard Drive: If your hard drive starts failing, files on your hard drive may become corrupted. You may see long delays when you attempt to access files or save to the hard drive. Windows may stop booting entirely. CPU: A failing CPU may result in your computer not booting at all. If the CPU is overheating, your computer may blue-screen when it’s under load — for example, when you’re playing a demanding game or encoding video. RAM: Applications write data to your RAM and use it for short-term storage. If your RAM starts failing, an application may write data to part of the RAM, then later read it back and get an incorrect value. This can result in application crashes, blue screens, and file corruption. Graphics Card: Graphics card problems may result in graphical errors while rendering 3D content or even just while displaying your desktop. If the graphics card is overheating, it may crash your graphics driver or cause your computer to freeze while under load — for example, when playing demanding 3D games. Fans: If any of the fans fail in your computer, components may overheat and you may see the above CPU or graphics card problems. Your computer may also shut itself down abruptly so it doesn’t overheat any further and damage itself. Motherboard: Motherboard problems can be extremely tough to diagnose. You may see occasional blue screens or similar problems. Power Supply: A malfunctioning power supply is also tough to diagnose — it may deliver too much power to a component, damaging it and causing it to malfunction. If the power supply dies completely, your computer won’t power on and nothing will happen when you press the power button. Other common problems — for example, a computer slowing down — are likely to be software problems. It’s also possible that software problems can cause many of the above symptoms — malware that hooks deep into the Windows kernel can cause your computer to blue-screen, for example. The Only Way to Know For Sure We’ve tried to give you some idea of the difference between common software problems and hardware problems with the above examples. But it’s often tough to know for sure, and troubleshooting is usually a trial-and-error process. This is especially true if you have an intermittent problem, such as your computer blue-screening a few times a week. You can try scanning your computer for malware and running System Restore to restore your computer’s system software back to its previous working state, but these aren’t  guaranteed ways to fix software problems. The best way to determine whether the problem you have is a software or hardware one is to bite the bullet and restore your computer’s software back to its default state. That means reinstalling Windows or using the Refresh or reset feature on Windows 8. See whether the problem still persists after you restore its operating system to its default state. If you still see the same problem – for example, if your computer is blue-screening and continues to blue-screen after reinstalling Windows — you know you have a hardware problem and need to have your computer fixed or replaced. If the computer crashes or freezes while reinstalling Windows, you definitely have a hardware problem. Even this isn’t a completely perfect method — for example, you may reinstall Windows and install the same hardware drivers afterwards. If the hardware drivers are badly programmed, the blue-screens may continue. Blue screens of death aren’t as common on Windows these days — if you’re encountering them frequently, you likely have a hardware problem. Most blue screens you encounter will likely be caused by hardware issues. On the other hand, other common complaints like “my computer has slowed down” are easily fixable software problems. When in doubt, back up your files and reinstall Windows. Image Credit: Anders Sandberg on Flickr, comedy_nose on Flickr     

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  • WCF AuthenticationService in IIS7 Error

    - by germandb
    I have a WCF Server running on IIS 7 using default application pool, with SSL activate, the services is installed in a SBS Server 2008. I implement client application services with wcf and SQL 2005 for setting the access control in my application. The application run under windows vista and is make with WPF. In my developer machine the application and the WCF services run well, the IIS i'm use for the trials is the local IIS 7 and the database is the SQL Server 2005 database hosting in my server. I'm using Visual Studio Project Designer to enable and configure client application services. using https://localhost/WcfServidorFundacion. When i'm change the authentication services location to https://WcfServices:5659/WcfServidorFundacion and recompile the application, the following error show up. Message: The web service returned the error status code: InternalServerError. Details of service failure: {"Message":" Error while processing your request ","StackTrace":"","ExceptionType":""} Stack Trace: en System.Net.HttpWebRequest.GetResponse() en System.Web.ClientServices.Providers.ProxyHelper.CreateWebRequestAndGetResponse(String serverUri, CookieContainer& cookies, String username, String connectionString, String connectionStringProvider, String[] paramNames, Object[] paramValues, Type returnType) InnerException: System.Net.WebException Message="Remote Server Error: (500) Interal Server Error." I can access the WCF service from the navigator using the url mentioned above and even make a webReference in my project. I make a capture of the response but I'cant post it because i don't have 10 reputation points I activate the error log in the IIS 7 server, and the result is a Warning in the ManagedPipilineHandler. I appreciate if any one can help me Errors & Warnings No.? Severity Event Module Name 132. view trace Warning -MODULE_SET_RESPONSE_ERROR_STATUS ModuleName ManagedPipelineHandler Notification 128 HttpStatus 500 HttpReason Internal Server Error HttpSubStatus 0 ErrorCode 0 ConfigExceptionInfo Notification EXECUTE_REQUEST_HANDLER ErrorCode La operación se ha completado correctamente. (0x0) Maybe this can help, is the web.config of my service <?xml version="1.0" encoding="utf-8"?> <!-- Nota: como alternativa para editar manualmente este archivo, puede utilizar la herramienta Administración de sitios web para configurar los valores de la aplicación. Utilice la opción Sitio Web->Configuración de Asp.Net en Visual Studio. Encontrará una lista completa de valores de configuración y comentarios en machine.config.comments, que se encuentra generalmente en \Windows\Microsoft.Net\Framework\v2.x\Config --> <configuration> <configSections> <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" /> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> </sectionGroup> </sectionGroup> </sectionGroup> </configSections> <appSettings /> <connectionStrings> <remove name="LocalMySqlServer" /> <remove name="LocalSqlServer" /> <add name="fundacionSelfAut" connectionString="Data Source=FUNDACIONSERVER/PRUEBAS;Initial Catalog=fundacion;User ID=wcfBaseDatos;Password=qwerty_2009;" providerName="System.Data.SqlClient" /> </connectionStrings> <system.web> <profile enabled="true" defaultProvider="SqlProfileProvider"> <providers> <clear /> <add name="SqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="fundacionSelfAut" applicationName="fundafe" /> </providers> <properties> <add name="FirstName" type="String" /> <add name="LastName" type="String" /> <add name="PhoneNumber" type="String" /> </properties> </profile> <roleManager enabled="true" defaultProvider="SqlRoleProvider"> <providers> <clear /> <add name="SqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="fundacionSelfAut" applicationName="fundafe" /> </providers> </roleManager> <membership defaultProvider="SqlMembershipProvider"> <providers> <clear /> <add name="SqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="fundacionSelfAut" applicationName="fundafe" enablePasswordRetrieval="false" enablePasswordReset="false" requiresQuestionAndAnswer="true" requiresUniqueEmail="true" passwordFormat="Hashed" /> </providers> </membership> <authentication mode="Forms" /> <compilation debug="true" strict="false" explicit="true"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </assemblies> </compilation> <!-- La sección <authentication> permite la configuración del modo de autenticación de seguridad utilizado por ASP.NET para identificar a un usuario entrante. --> <!-- La sección <customErrors> permite configurar las acciones que se deben llevar a cabo/cuando un error no controlado tiene lugar durante la ejecución de una solicitud. Específicamente, permite a los desarrolladores configurar páginas de error html que se mostrarán en lugar de un seguimiento de pila de errores. <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors> --> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </controls> </pages> <httpHandlers> <remove verb="*" path="*.asmx" /> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" /> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </httpModules> <sessionState timeout="40" /> </system.web> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <providerOption name="CompilerVersion" value="v3.5" /> <providerOption name="WarnAsError" value="false" /> </compiler> </compilers> </system.codedom> <!-- La sección webServer del sistema es necesaria para ejecutar ASP.NET AJAX en Internet Information Services 7.0. Sin embargo, no es necesaria para la versión anterior de IIS. --> <system.webServer> <validation validateIntegratedModeConfiguration="false" /> <modules> <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated" /> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </handlers> <tracing> <traceFailedRequests> <add path="*"> <traceAreas> <add provider="ASP" verbosity="Verbose" /> <add provider="ASPNET" areas="Infrastructure,Module,Page,AppServices" verbosity="Verbose" /> <add provider="ISAPI Extension" verbosity="Verbose" /> <add provider="WWW Server" areas="Authentication,Security,Filter,StaticFile,CGI,Compression,Cache,RequestNotifications,Module" verbosity="Verbose" /> </traceAreas> <failureDefinitions statusCodes="401.3,500,403,404,405" /> </add> </traceFailedRequests> </tracing> <security> <authorization> <add accessType="Allow" users="germanbarbosa,informatica" /> </authorization> <authentication> <windowsAuthentication enabled="false" /> </authentication> </security> </system.webServer> <system.web.extensions> <scripting> <webServices> <authenticationService enabled="true" requireSSL="true" /> <profileService enabled="true" readAccessProperties="FirstName,LastName,PhoneNumber" /> <roleService enabled="true" /> </webServices> </scripting> </system.web.extensions> <system.serviceModel> <services> <!-- this enables the WCF AuthenticationService endpoint --> <service behaviorConfiguration="AppServiceBehaviors" name="System.Web.ApplicationServices.AuthenticationService"> <endpoint address="" binding="basicHttpBinding" bindingConfiguration="userHttps" bindingNamespace="http://asp.net/ApplicationServices/v200" contract="System.Web.ApplicationServices.AuthenticationService" /> </service> <!-- this enables the WCF RoleService endpoint --> <service behaviorConfiguration="AppServiceBehaviors" name="System.Web.ApplicationServices.RoleService"> <endpoint binding="basicHttpBinding" bindingConfiguration="userHttps" bindingNamespace="http://asp.net/ApplicationServices/v200" contract="System.Web.ApplicationServices.RoleService" /> </service> <!-- this enables the WCF ProfileService endpoint --> <service behaviorConfiguration="AppServiceBehaviors" name="System.Web.ApplicationServices.ProfileService"> <endpoint binding="basicHttpBinding" bindingNamespace="http://asp.net/ApplicationServices/v200" bindingConfiguration="userHttps" contract="System.Web.ApplicationServices.ProfileService" /> </service> </services> <bindings> <basicHttpBinding> <!-- Set up a binding that uses Username as the client credential type --> <binding name="userHttps"> <security mode="Transport"> </security> </binding> </basicHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="AppServiceBehaviors"> <serviceMetadata httpGetEnabled="false" httpsGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="true" /> <serviceAuthorization principalPermissionMode="UseAspNetRoles" roleProviderName="SqlRoleProvider" /> <serviceCredentials> <userNameAuthentication userNamePasswordValidationMode="MembershipProvider" membershipProviderName="SqlMembershipProvider" /> </serviceCredentials> </behavior> </serviceBehaviors> </behaviors> <serviceHostingEnvironment aspNetCompatibilityEnabled="true" /> </system.serviceModel> </configuration>

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  • Mysql Slave stuck in "System lock"

    - by Greg
    My MySQL slave is spending a lot of time in Slave_SQL_Running_State: System lock. I can see that the system is currently I/O write bound, and that it is processing the log, although slowly. Show processlist doesn't show anything other than "Waiting for master to send event" and "System lock" when it is in this state. All my tables (other than the system tables) are InnoDB, and external locking is disabled. What is the slave doing in this state?

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  • Disable visual system beep on Karmic

    - by pzico
    Some programs are about to make me epileptic with excessive screen flashing/blinking (terminator etc.). In Ubuntu Hardy Heron I could solve the problem by unchecking System-Preferences-Sound-System Beep-Visual system beep. However on Karmic Koala there is no such option. I googled and found many solutions for turning off visual beep/bell. However nothing seems to work. So my question is that what is the exact alternative to disable Visual system beep on Karmic?

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  • Major computer speed problems

    - by Glen654
    I've been running Windows 7 on my laptop for about a year now, and have had no issues regarding speed. About a month ago, my computer had what I refer to now as an "episode" where it runs extremely slow, when I open Task Manager I see no significant processes running, nothing out of the ordinary, but my computer is at 100% CPU usage. Usually restarting fixed this problem, but it seems to have gotten worse to the point where restarting does not fix this problem, and it's interfering with my work. What should I do?

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  • Connect to host computer from Virtual PC 2007

    - by Vegard Larsen
    I am having trouble using my guest (Windows XP SP3) to communicate over TCP/IP to the host computer (Windows 7) using Virtual PC 2007. I have WAMPServer running on my host, and want to be able to access the websites on there from my guest OS. What do I do to make this work? What is the IP address of the host computer when using Shared Networking? As far as I can tell "Internal Networking" won't work, because that only allows communication between the guests, not between a guest and the host.

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  • Auto-start the SQL Server Agent after a computer restart

    - by Dreas Grech
    I am using the SQL Server Agent to run some jobs every day, but the problem is that whenever the server (the machine itself) is restarted, the SQL Server Agent doesn't automatically start when the computer boots back up again...and I have to start it manually myself. How can I set the Server Agent to Auto-Start after a computer restart? Is there a particular Windows Service I need to set as auto-start ?

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