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• Ubuntu 12.10 wont boot

  - by John Mark High

  im new to using Ubuntu and just bought a HP Pavilion g6-2240sa with windows 8 pre installed. I made a bootable USB with Ubuntu on it and installed alsongside windows, for 2 days it worked fine, I got into Ubuntu by doing an advanced restart from windows 8 and then booting Ubuntu from the partition it made. When i did the advanced restart today there was only 1 HDD i could select ( there were 3 before windows, a restore partition that was already there when i got the computer and Ubuntu) so i booted from the USB again and re-installed Ubuntu. then did an advanced restart and the 3 partitions where there again, i booted from Ubuntu and now heres my problem. I get the Ubuntu background when its loading then its just a black screen with some writing, its not on long enough to read, then just a black screen with a white _ and the top left corner that does nothing, i have to restat the computer and it auto boots into windows 8. im a little confused as the first time i installed Ubuntu it worked fine until the partition dissaperd), the second time i installed i did everything the same except it found the old Ubuntu so i reinstalled it and now is donst work.

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• How to merge several detached signatures from different people into one?

  - by Petr Pudlák

  A group of people wants to publish a file and they all want to digitally sign the file as different recipients of the file will have different chains of trust. For simplicity, it's desired that there is only one detached signature file with all the signatures, so that the recipients don't need to check them one by one: foo.tar.gz foo.tar.gz.sig However, for security reasons, every person needs to perform the signing on their computer, it's not possible to create the combined signature by having multiple private keys on one computer and performing the operation with one command. Is it possible with GPG to somehow merge detached signatures of a file from multiple participants?

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• Virtualbox crashes quite often in Windows 8

  - by user1776158

  I just installed Windows 8 on my computer. I got the ISO and the product key from my university so the software itself is sound. I use alot of virtual box. And ever since I moved to Windows 8, I have noticed that virtual box crashes more often. In particular, it is very very bad at opening multiple guests. My CPU usage will be at like 20% and I only have 3 guests open and my entire computer just freezes. Cursor and all. In Windows 7, I was able to open like 6 (not that I ever needed to) and really push my CPU. I havent experience any other issues with Windows 8 yet. Has anyone encountered this? Thanks!

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• Improve efficiency when using parallel to read from compressed stream

  - by Yoga

  Is another question extended from the previous one [1] I have a compressed file and stream them to feed into a python program, e.g. bzcat data.bz2 | parallel --no-notice -j16 --pipe python parse.py > result.txt The parse.py can read from stdin continusuoly and print to stdout My ec2 instance is 16 cores but from the top command it is showing 3 to 4 load average only. From the ps, I am seeing a lot of stuffs like.. sh -c 'dd bs=1 count=1 of=/tmp/7D_YxccfY7.chr 2>/dev/null'; I know I can improve using the -a in.txtto improve performance, but with my case I am streaming from bz2 (I cannot exact it since I don't have enought disk space) How to improve the efficiency for my case? [1] Gnu parallel not utilizing all the CPU

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• Windows Server 2003: Nat Port Forwarding Not Working

  - by jM2.me

  The setup is following: Internet (108.99.XXX.XX) <- Windows Server 2003 (10.0.0.1) <- Switch <- Office Computers (10.0.0.100-200 some static routes some manual some automatic) Windows Server has NAT installed on it and two network interfaces are configured properly. The problem is, whenever I try to forward port 80 (or any other) from office computer (lets say 10.0.0.100), it fails. Nic #1 Settings: All settings are obtained from ISP Nic #2 Settings: Set manually IP: 10.0.0.1 Mask: 255.255.255.0 Nat Server is configured to automatically assign IP addresses to private network. Settings are: IP: 10.0.0.0 Mask: 255.255.255.0 Forwarding was done in Routing and Remote Access (local) - IP Routing - NAT/Basic Firewall - Local Area Connection (right click_properties) - services and ports - Web Server HTTP - Private Address: 10.0.0.100 SO what is causing the problem of failure to forward any port from other computer inside private network?

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• How to set up Pegasus Mail in non-admin account?

  - by thursdaysgeek

  I'm using Pegasus Mail for my mail client, and on my old computer (XP Pro), I could log in as the guest or admin account and it would still work. I recently got a new computer, with XP Pro, and I've set the mail client to work fine when I log in to the admin account, but when I log into the guest account, it always wants the SMTP, POP, and other connection information. How do I get it to remember that? I tried making an admin account, setting it up, and then downgrading that account, but that didn't work either. Does anyone even use PMail?

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• Ubuntu 12.04 + Bluetooth problems with maintaining connection

  - by ifndefx

  I have an Apple Wireless Mouse, Apple Wireless Keyboard, Apple Wireless Trackpad, and a pair of headphones. All of these connect to the computer via a Bluetooth dongle. After several hours I've managed to get the devices paired (all except the headphones) with the computer. However, I'm facing a problem where a connection can't be maintained even with one device. I first started with the gnome bluetooth applet, this couldn't even pick up devices, so I installed blueman, and this at least detected the devices but it couldn't keep the connection going. Then i read somewhere to get hidd installed and use the command line using the mac address of the device (which I got from blueman) and this worked really well, the connection was stable, but there's still a couple of issues that I need help with: If I am to use hidd I need to execute this via terminal, which means for the keyboard and the mouse I need to have two of each. This doesn't make sense. I need the bluetooth daemon to have started with the devices picked up a lot earlier, and especially at grub bootloader. The mouse and the trackpad both work if i use hidd, however, I cannot get the right mouse to work nor the scroll wheel to work. The headphones don't work period, they don't work with any of the bluetooth applets, and with hidd either. When I use blueman aplet, it attempts to pair and states 'Authentication Rejected". The headphone is Phillips SHB9100. If someone can help me with this, I would be grateful.

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• Fresh Ubuntu 12.10 install no desktop or wing bar

  - by Travis

  After a fresh installm of ubuntu 12.10 (complete erase) after logging in it appears i have no taskbar or much of anything, although i can still execute my terminal with CTRL+ALT+T. i looked around a little, seems i'm not the only person who has had this problem. I found here: http://ubuntuforums.org/showthread.php?p=12303179#post12303179 From there, i found myself here: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-updates/+bug/1068341 I followed precisely the instructions provided which were: this problem is solved this way Switch to a terminal (Ctrl-Alt-F1). Login as your username. Install linux source (sudo apt-get install linux-source) and headers (sudo apt-get install linux-headers-3.5.0-17-generic). Uninstall nvidia driver - this depends on which version you installed (sudo apt-get remove nvidia-current or sudo apt-get remove nvidia-current-updates or sudo apt-get remove nvidia-experimental-304). Reinstall nvidia driver (sudo apt-get install nvidia-current-updates). If it successfully installs, restart the computer (sudo shutdown -r now). Source Desktop does not show when I installed nvidia drivers! I have rebooted, and i am still having the exact same problem. so i back at square one. can someone help me please? this is my room mates computer and i told him i was "fixing" it and now i feel like i've ruined it. Any help is greatly appreciated. Thank you for your time.

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• Transferring whole folders using Dropbox without the desktop app

  - by Ender

  Is there any way I can upload whole folders to my Dropbox account without the desktop application? I am syncing my home computer to a computer at university and the university computers do not allow users to install applications anywhere, meaning that I cannot use the Dropbox utility to share my folders. I've attempted to use the online utility (on the website) to share my files, but much of my work is spanned over dozens of files all within their own folders. All you can do with the upload feature on the website is upload files and for my projects this would take a long time.

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• JQueryMobile - Problems with dialog boxes [closed]

  - by Richard van Hees

  I'm programming in JQueryMobile, but I can't seem to get some things as I want. First it's good to tell I am mostly programming in a multi-page template. I have a login function in the web based app. The idea is that the user sees he's not logged in and the user can click on the button to log in. A dialog box pops up, in which the user can enter his credentials. This dialog box is in front of the previous page, in my case just index.php. The page for profile is at profile.php#profile. In this case the url for the dialog box is index.php#profile&ui-state=dialog. Don't ask me why, that's how JQueryMobile works, I guess. Anyway, after the user clicks on 'Login' in the pop-up, I want a new dialog to pop-up in which it says you are logged in and I want the content of the page behind it (index.php#profile) to refresh. Of course I want this all to move very smooth and no refreshing of the whole page, to prevent loading time and thus a blank screen for a second. In short: User not logged in Clicks on login Dialog pops up with form Clicks login New dialog pops up with 'success' (or whatever) in the same style as the previous dialog Clicks ok Page behind the dialogues has been refreshed without user noticing Also another thing that doesn't really work out for me: I can't seem to get a dialog to pop up, triggered by an action in another dialog. It just appears as a normal page.

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• How are file permissions applied for shared drives?

  - by sleske

  I have two computers: A (running Windows Vista) B (running XP). I shared C: on computer A (as \\A\C ), and require a username (X) plus pw to access it. If I browse the the share \A\C on computer B, after entering username+pw I can access most folders, but one folder "\\A\C\F" gives me "permission denied". I looked at that folder's permissions on A, and it has full access permissons for all "Administrators". I use the account "A\X" to authenticate when accessing the share on A. X is a user account (on A) that is an "Administrator" according to Window's user management. Still, I cannot access this folder. If I explicitly add the "X" account to the accounts that may access folder F (under Properties / Security), I can access it without problems. I do not understand why I need to explicitly grant permission for X to get access to F. Is it not enough that X is an Administrator account?

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• PC shuts down when installing ubuntu?

  - by Robin002

  I'm now using ubuntu from USB, and I'd like to install ubuntu on my hard disk. I tried the option of removing Vista while installing ubuntu. However, near the end of the installation process (presumably the end because I can see some slideshows on how to start using ubuntu), the screen suddenly goes to black with white words running around on it. Soon the computer shuts down. After that, restarting leads to a black screen with only a small white cursor on the top left corner. The cursor keeps blinking and nothing happens. I found that I can alternatively choose to boot with USB by hitting F12 just when the computer starts. So I tried to reinstall ubuntu by running ubuntu on USB. One of the options of installation is to update ubuntu 11.04 to ubuntu 11.04, so it seems the ubuntu is already installed somehow. Anyways, I tried both update and delete and install option but the same thing happens as the 1st time (sometimes before reaching the end), while I still cannot start my PC as ubuntu (without USB). How may I install ubuntu properly?

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• Shader compile log depending on hardware

  - by dreta

  I'm done with the core of my graphics engine and I'm testing it on every platform I can get my hands on. Now, what I noticed is that different drivers return different shader and program compile log content. For example, on my friend's laptop if you successfuly compile a shader then the log is simply empty. However on my PC I get some useful information along with it. So if I compile a vertex shader, I'll get: Vertex shader was successfully compiled to run on hardware. Which isn't that impressive, but is what happens when I compile a program. On my friend's computer the log is empty, since the program compiles. However on my own computer I get: Vertex shader(s) linked, fragment shader(s) linked. Which is awesome, because I'm attaching a geometry shader with 0 (I have a geometry shader file with trash, so it doesn't compile and the pointer is set to 0), and the compiler just tells me which shaders linked. Now it got me thinking, if I was going to buy a graphics card, is there a way for me to get the information about whether or not I'll get this "extended" compile information? Maybe it's vendor specific? Now I don't expect an answer TBH, this seems a bit obscure, but maybe somebody has any experience with this and could post it.

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• Service Catalogs for Database as a Service

  - by B R Clouse

  At the end of last month, I had the opportunity to present a speaking session at Oracle OpenWorld: Database as a Service: Creating a Database Cloud Service Catalog.  The session was well-attended which would have surprised me several months ago when I started researching this topic.  At that time, I thought of service catalogs as something trivial which could be explained in a few simple slides.  But while looking at all the different options and approaches available, I came to learn that designing a succinct and effective catalog is not a trivial task, and mistakes can lead to confusion and unintended side effects.  And when the room filled up, my new point of view was confirmed. In case you missed the session, or were able to attend but would like more details, I've posted a white paper that covers the topics from the session, and more.  We start with an overview of the components of a service catalog: And then look at several customer case studies of service catalogs for DBaaS.  Synthesizing those examples, we summarize the main options for defining the service categories and their levels.  We end with a template for defining Bronze | Silver | Gold service tiers for Oracle Database Services. The paper is now available here - watch for updates as we work to expand some sections and incorporate readers' feedback (hint - that includes your feedback). Visit our OTN page for additional Database Cloud collateral.

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• PCs with Wired Connection Keep Losing Internet Connectivity

  - by user717452

  I have a U-verse ATT DSL Internet at our church building. Recently, any computer that is plugged into the network via Ethernet keeps losing its internet connectivity. The setup is from the Modem to a Netgear Wireless Router, and from the router to 3 different computers. None of the laptops that use Wifi ever lose internet, just the wired ones, and I end up having to do ipconfig /release and /renew every day to get it back. One computer has Windows 7 and one has Windows XP. Any ideas as to what is going on with our network?

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• Should sanity be a property of a programmer or a program?

  - by toplel32

  I design and implement languages, that can range from object notations to markup languages. In many cases I have considered restrictions in favor of sanity (common knowledge), like in the case of control characters in identifiers. There are two consequences to consider before doing this: It takes extra computation It narrows liberty I'm interested to learn how developers think of decisions like this. As you may know Microsoft C# is very open on the contrary. If you really want to prefix your integer as Long with 'l' instead of 'L' and so risk other developers of confusing '1' and 'l', no problem. If you want to name your variables in non-latin script so they will contrast with C#'s latin keywords, no problem. Or if you want to distribute a string over multiple lines and so break a series of indentation, no problem. It is cheap to ensure consistency with restrictions and this makes it tempting to implement. But in the case of disallowing non-latin characters (concerning the second example), it means a discredit to Unicode, because one would not take full advantage of its capacity.

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• Web hosting company basically forces me to use their domain name [closed]

  - by Jinx

  I've recently stumbled upon an unusual problem with one of hosting companies called giga-international.com. Anyway, I've ordered com.hr domain from Croatian domain name registration company, and my client insisted on using this host provider as couple of his friends already are hosted with them. I thought something was fishy when the first result on Google for Giga International was this little forum rant instead of their webpage. When I was checking their services they listed many features etc... space available, bandwidth etc. I just wanted to check how much ram do I get for my PHP scripts so I emailed them, and they told me that was company secret. Seriously? Anyway, since my client still insisted on hosting with them I've bought their Webspace package. During registration I had to choose free domain name because I couldn't advance registration without it. Nowhere was said, not even in general terms and conditions that I wouldn't be able to change that domain name. At least not for double the price of domain name per year. They said I can either move my domain name over to them (and pay them domain registration), or pay them 1 Euro per month for managing a DNS entry. On any previous hosting solution I was able to manage my domain names just by pointing my domain to their name servers, and this is something completely new and absurd for me. They also said that usual approach is not possible because of security and hardware limitations. I'd like to know what you guys think about this case, and should I report, and where should I report this case. In short. They forced me to register free domain name which doesn't suit my needs in order to register for their webspace package, and refuse to change domain name for my account until I either transfer domain to them or pay them DNS management which costs double the price of the domain name per year.

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• xl create doesn't bring up console

  - by ineff

  I've tryed to run VM in Xen 4.2 using xl command (for what I get this should be standard toolstack, while xm is deprecated). In this case I've the following configuration file kernel = '/media/home_separata/domU_kernel/boot/vmlinuz-linux' ramdisk = '/media/home_separata/domU_kernel/boot/initramfs-linux.img' name = "domU_Arch_linux" memory = "512" root = '/dev/xvda1 ro' disk = ['file:/media/home_separata/domU_kernel/arch_linux_kernel.img,xvda1,w'] vif = ['mac=aa:::10:11:f1,ip=192.168.0.2,bridge=xenbr0'] when I try to start the virtual machine with xl create it seems it works (it also bring up the vif interfaces) but if I try to connect via xl console it gives an error: xenconsole: Could not read tty from store: No such file or directory the fun fact is that the I've the problem inverse using xend/xm (in that case xend doesn't bring up vif interfaces but activate console). Does anyone have any suggestion?

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• Terminal Server 2003 Gaining Time when Windows 7 Client Connects

  - by Matthew

  A Windows 2003 Terminal Server keeps time perfectly until a Windows 7 Home client connects. Then it gains time at a rate of several seconds per minute. The client connects through a firewall with only the RDP port open. The client runs the same apps on the terminal server that XP clients run with no issues. Using the Microsoft Terminal Server Client application copied to the W7 computer from an XPsp3 computer gives the same results. Current workaround is to sync time every 5 minutes. Any better ideas?

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• Wake-On-Lan - is it possible to access boot menu?

  - by truthseeker

  Now imagine this situation. I have a computer which has 2 operating systems installed - Windows XP and Windows 7. On booting menu is displayed where I can select which operating system I want to load. When I do nothing, Windows 7 loads (after some delay). This computer is connected to LAN and has Wake-On-Lan function enabled. Is it possible to remotely select which operating system I wish to load? Now it is Windows 7. But sometimes I wish it would be Windows XP.

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• Extremely poor WiFi reception on new desktop

  - by guy

  I just received a new desktop with a built-in WiFi card (Windows 7 Home Premium x64). However, I am only able to receive any WiFi signal when the computer is within 1-2 meters of a router. Even then, the signal is very weak (Windows 7 says it is "poor"). I have tried this with 2 different routers and see similar results. I have somewhere around a dozen other devices that can connect to both routers with greater signal strength (usually full strength) from much, much further away. When I tried calling support I was instructed to reinstall my drivers and attempt to change the WiFi channel of the router. Neither worked. I was then told that the problem was with my routers and that the computer was functioning normally and that it was certainly not a hardware problem. What would be the cause of this and is there anything I can do to fix it?

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• dual-boot does not work

  - by elyashiv

  I have a PC with linux-mint installed on it. I wanted to install win-7 along-side, for some reasones. what I have done is: create a bootable USB-stick with Ubontu ios. restarted the computer, this time with Ubuntu (running from my disk-on-key). created a partition on the main HD using GPart. formated the partition to NTFS. restarted the computer, this time through the installation CD for win-7. installed win-7 with normal settings. that all worked, and I'm writing this through win-7. the thing is - when I boot my system, I don't get to choose what OS to run. I checked the settings in msconfig, and in boot label it has just win-7. how can I boot linux?

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• At what point does programming become a useful skill?

  - by Elip

  This is probably a very difficult question to answer, because of its subjectivity, but even a vague guess would help me out: Now that Khan Academy is beginning to offer Computer Science lectures I'm getting an itch to learn programming again. I maybe am a bit more technical than your average computer user, using Ubuntu as my OS, LaTeX for writing and I know some small tricks like regular expressions or boolean search for google. However from my previous attempts to learn programming, I realized I do not have a natural aptitude for it and I also don't seem to enjoy the process. But I am fairly certain that a basic proficiency in programming could prove to be very beneficial for me career wise; I also often get ideas for little scripts that I cannot implement. My question is: Let's say you study programming 1 hour / day on average. At what point will you become good enough so that programming can be used for automating tasks and actually saving time? Do you think programming is worth picking up if you never have the ambition to make it your career or even your hobby, but use it strictly for utility purposes?

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• How to move partition with Users to a new SATA controller?

  - by Al Kepp

  Our current situation: X79 chipset. Windows 7 installed on SATA SSD running on Marvell controller. C:\Users contains just Public and computer-name folders, all the other users are created in E:\Users. That partition is on two HDD's running on an Intel RAID controller. (The motherboard has got two SATA/RAID onboard controllers.) The goal is: Without reinstallation, I want to move SSD to a standard SATA controller. Then I want to get rid of RAID1, and move one HDD to the same internal Intel SATA controller and the current E:\Users move to that new place. I want it to stay as E:\users, but I need to reinstall the HDD to let it work in SATA mode without RAID. So I face several problems. I am sure all are solvable with free software utilities, but I don't know how exactly to do it. I can see the particular problems: I have got all users at E:\Users. When I turn off that E:\ disk, I won't be able to login to Windows. I need at least one admin account to be placed back at C:\users. The current C: runs on standard 120 GB SSD, but it is connected to a Marvell SATA/RAID controller. I am affraid the Windows won't let me put it to Intel SATA controller due to hardware/licence check, and I won't be able to use standard W7 recovery disk either, because there probably isn't marvel SATA/RAID driver on it. I haven't tried anything yet, because I am affraid I can end up with computer not working at all. (I want to move it to a standard ICH10 Intel SATA controller to let us have no problems in future with it. I think it is not very safe when we use any nonstandard hardware to boot the computer.) I need to somehow backup current E:\ disk and restore it to a new E:. I hope this will be the easy part (as long as the admin account will reside on C:). The E: RAID array is very large, but it is almost empty (less than 100 GB of data.) So I can make the partition smaller so it can easily fit to a single SATA HDD.

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• Odd Language In a BIOS Message

  - by Josh

  So I started up my laptop today and was greeted with the following message (not a direct quote): The type of the AC adapter cannot be determined. This may interfere with your computer's performance. Try unplugging the AC adapter and then plugging it back in, thanks. The problem was that I hadn't fully secured the plug into the back of the computer. However, I was a little taken aback when a message from BIOS said, "thanks." Is this normal? Any chance the message was illegitimate (virus)?

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