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• How Data Transfers differ on Smart Phones: Iphone vs. Android vs. Windows Phone

  - by MCH

  I am interested in how each individual smart phone is allowed to handle data transfers within a third-party app. I am interested in designing apps that allow customers to update, transfer, download, etc. data from their smart phone to their personal computer and vice-versa. (Ranging from just text, to XML, to a Relational Database) I only have experience with the Ipod Touch before and one particular app that maintained all the data on an online server, so to update the data on your pc or iphone you had to go online, are there other ways to do it? Like bluetooth, wireless LAN, USB, etc? I believe Apple has certain policies on this in order to control the App Store and individual Iphones. I suppose each company has a particular policy on how an app is allowed to transfer data to another system, does anyone have a good understanding of this? Thank you.

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• Only sdb shows up when installing 12.04 on new Dell inspiron 14z

  - by Jan Korpegård

  I got my brand new Dell Inspiron 14z yesterday, but failed to install Ubuntu. I can boot from a USB stick, and it works well. When trying to install, I confirm that the laptop is connected to the internet etc (as in the 2nd picture in the installation guide: How do I install Ubuntu?). When pressing "Continue" I do not get the question on installation type (alongside/replace/something else). Instead I get a window where I can select partitions: // Picture removed due to low reputation... The problem is that I can only select sdb in the drop drop down box, and I can do do nothing with sdb (like adding partitions etc). The main disk (sda) is partitioned using Gparted the following way: // Picture removed due to low reputation As far as I understand from other threads on askubuntu, this should work... What can I do to install Ubuntu alongside with Windows 7?

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• How To Change the Window Border Color in Windows 8

  - by Chris Hoffman

  Windows 8’s default blue window border color isn’t the only option. Windows 8 automatically selects the appropriate color depending on your wallpaper – you can also select a different color or use a third-party tool to easily select other colors. Changing the color of the window borders also changes the color of your taskbar. The taskbar and window borders use the same colors in Windows 8, although the taskbar is still partially transparent. HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder?

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• Ubuntu 12.10 install freezes at configuring hardware

  - by Max Keener

  I'm installing Ubuntu 12.10 (64 bit) from a bootable USB stick. At first I had trouble with a black screen after selecting 'install ubuntu'. I added nomodeset and xforcevesa to the options to fix that problem. Now when installing, it hangs at 'Configuring Hardware', specifically at ubuntu ubiquity: update-initramfs: Generating /boot/initrd.img-3.5.0-17-generic Specs: Asus UX32a DB51 Intel Core i5 3317U 1.7 GHz 4GB DDR3 RAM intel hd 4000 graphics 500 GB harddrive with 25 GB sandisk ssd I'm trying to install Ubuntu by itself right now on the SSD. I made custom partitions (100 mb EFI boot partition, 4GB swap space, 20GB ext4 mounted on '/') I've tried re-downloading the ubuntu iso and creating a new boot image on my flash drive and it results in the same problem. Thanks in advance for the help!

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• Can I copy large files faster without using the file cache?

  - by Veazer

  After adding the preload package, my applications seem to speed up but if I copy a large file, the file cache grows by more than double the size of the file. By transferring a single 3-4 GB virtualbox image or video file to an external drive, this huge cache seems to remove all the preloaded applications from memory, leading to increased load times and general performance drops. Is there a way to copy large, multi-gigabyte files without caching them (i.e. bypassing the file cache)? Or a way to whitelist or blacklist specific folders from being cached?

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• two windows loader in grub

  - by Lorenzo

  i'm facing a strange problem about which - googling- i didn't find any solution. This is the issue. I've restored windows 7 trught its hidden partition then i installed kubuntu 12.04 which didn't installed the grub loader. Hence via the same usb-live i used boot-repair which have found all the system that are: kubuntu + its recovery mode windows 7 /dev/sda1 windows 7 /dev/sda2 windows 7 recovery I don't know why i have got 2 windows loader, but they seem (to me) to load the same system. I tryied to see what is there written in the grub.cfg and it seems that the "root" directory for the two system is different eventhought when i load from sda1 i got "Avvio windows" (italian laguange that i choosed) and on sda2 i got "start windows" in the english language when the splash screen load. Can you PLEASE help me removing one of the two entry? i can not really see them, i want only one but i don't know how to act.. Thank you very much indeed. Lorenzo

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• Keep trying to install always throws error help!

  - by Hector Soto

  So I was installing 12.10 on my Asus g74sx laptop... Did everything the tutorial told me to do yet I keep getting an error saying that there was an error of input/output.. That I should check the hard drive and see if it needs replacement. I tried with 2 DVDs and did format twice my usb to fat 32 and mounted the image file for 12.10... No idea what is going on. Please help! Mmm I cannot add an image... I'll comment with the link to the error!

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• Ubuntu 12.04 upgrade (from 11.10) removed all packages installed

  - by Jagmal

  I upgraded from Ubuntu 11.10 to 12.04 using bootable USB. After upgrade, all non-default packages from 11.10 are gone. For ex, I did not have Chromium, Eclipse etc. Although, I could see these in the History in the "Ubuntu Software Center". Is there any way I can retrieve all these packages (even reverting back to 11.10 is also fine with me)? What could be a possible reason for this (We plan to upgrade a few more machines)? During the upgrade process, I had unchecked the box which asked permission to look online for upgrade/packages. Co

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• Using an external hard drive as a server and be able to connect via wifi [on hold]

  - by user289228

  OK, so i have an old external HDD(seagate 1tb) and a windows computer just in case but im trying to set it up as a server for my home at the moment but if everything goes right i want to transfer it to being a database hub for the business i work for that way i can have more then one register at a time on the same basic database. The thing is im new to the whole server part along with im not well versed with ubuntu either so what im getting at is if i can get it setup, can i connect it on ubuntu and run a linux based Point of sales program but have multiple linked to the single server? i may be able to do it via the router, i think its a belkin n600 with usb port but at this moment i dont know what it is since im not home. i just need information if this is possible and if so, a guide would be appreciated.

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• Is there any way to simulate a slow connection between my server and an iPad (without installing anything on the server)?

  - by Clay Nichols

  Some of our webapp users have difficulty on slower connections. I"m trying to get a better idea of what that "speed barrier is" so I'd like to be able to test a variety of connection speeds. I've found ways to do this on Windows but no on the iPad, so I'm looking more for some sort of proxy service that'll work with any device (not running ON that device) I did find an article about using the CharlesProxy and providing a connection to another device, but I was hoping for something simpler (need not be free) Constraints * We are on a shared server so we can't install anything and we are limited in our control over that server. * I'd like to test an iPad, Android Tablet, Windows PC.

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• Why are downloads from Canonical Partners repository so slow?

  - by Sabacon

  If I need Sun Java, Adobe Flash Plugin or anything else that comes from Canonical Partners the package downloads are painfully slow even small sized packages like the Flash plugin, to speed things up I have to go here: http://archive.canonical.com/ubuntu/pool/partner/ to find what I want, download the packages with a download manager (which is usually about 20 times faster than the package manager) and then place them in my /var/cache/apt/archives folder I run the package manager afterwards, as long as the right versions of the packages I ask to install are detected in the /var/cache/apt/archives folder they will be installed immediately. I would like to stop doing this, so I am wondering if anyone else has this problem, what could be the cause and if there is a fix. I am located in the Western Caribbean region. I think it would be helpful to note that all other packages coming from the repository I have selected with synaptic download at acceptable speeds.

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• Command line option to check which filesystem I am using?

  - by j-g-faustus

  Is there a command that will show which file system (ext3, ext4, FAT32, ...) the various partitions and disks are using? Similar to how sudo fdisk -l lists information about disks and partitions? Update Accepted the "mount" answer as mount works without specifying filesystem type (commenting out the relevant entries in fstab, if any): $ sudo mount /dev/sdf1 /mnt/tmp $ mount | grep /mnt/tmp /dev/sdf1 on /mnt/tmp type ext3 (rw) Found another option in ubuntuforums - blkid: # system disk $ sudo blkid /dev/sda1 /dev/sda1: UUID="...." TYPE="ext4" # USB disk: $ sudo blkid /dev/sdf1 /dev/sdf1: LABEL="backup" UUID="..." TYPE="ext3" # mdadm RAID: $ sudo blkid /dev/md0 /dev/md0: LABEL="raid" UUID="..." TYPE="ext4" Thanks for your help!

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• grub rescue: grub not installed

  - by linda8

  I tried to install beside my windows 7. It didn't work. After installing it could not find the root directory and I got some other error messages... I just wanted my computer to be faster again so instead I decided to reinstall windows from recovery disk. It formatted the disk and installed windows again. The hard-disk has msdos structure now and the ubuntu partition is empty When I start up the computer grab is starting up an I get a grab rescue problem, but grab is no longer installed. How can I boot directly into windows? i can boot Ubuntu from an usb stick but I'm not able to install it anymore. I just want windows to work again... I'm hoping for advice... Linda

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• css - use universal '*' selector vs. html or body selector?

  - by Michael Durrant

  Applying styles to the body tag will be applied to the whole page, so body { font-family: Verdana } will be applied to the whole page. This could also be done with * {font-family: Verdana} which would apply to all elements and so would seem to have the same effect. I understand the principle that in the first instance the style is being applied to one tag, body for the whole page whereas in the second example the font is being applied against each individual html elements. What I am asking is what is the practical difference in doing that, what are the implications and what is a reason, situation or best practice that leads to using one over another. One side-effect is certainly speed (+1 Rob). I am most interested in the actual reason to choose one over the other in terms of functionality.

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• Coherence on Exalogic: 6x Speeds on Half the Hardware is Possible

  - by jeckels

  Recently, Oracle Coherence released its 12c version, focused on scalability and real-time data delivery. As part of the launch, we showcased Coherence's tight coupling with Exalogic Elastic Cloud. By leveraging the Inifiniband Fabric in Exalogic, Coherence can now operate at up to 6x the speed on as little as half the hardware on an Exalogic box. This breakthrough is helping customers save money on their hardware costs while improving performance of their data grid. Here's a free resource available for you to explore this technology relationship further.For even more information on Coherence, attend our upcoming free virtual developer day on November 5th to see how developers can leverage Coherence in their everyday tasks.

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• Repelling a rigidbody in the direction an object is rotating

  - by ndg

  Working in Unity, I have a game object which I rotate each frame, like so: void Update() { transform.Rotate(new Vector3(0, 1, 0) * speed * Time.deltaTime); } However, I'm running into problems when it comes to applying a force to rigidbodies that collide with this game objects sphere collider. The effect I'm hoping to achieve is that objects which touch the collider are thrown in roughly the same direction as the object is rotating. To do this, I've tried the following: Vector3 force = ((transform.localRotation * Vector3.forward) * 2000) * Time.deltaTime; collision.gameObject.rigidbody.AddForce(force, ForceMode.Impulse); Unfortunately this doesn't always match the rotation of the object. To debug the issue, I wrote a simple OnDrawGizmos script, which (strangely) appears to draw the line correctly oriented to the rotation. void OnDrawGizmos() { Vector3 pos = transform.position + ((transform.localRotation * Vector3.forward) * 2); Debug.DrawLine(transform.position, pos, Color.red); } You can see the result of the OnDrawGizmos function below: What am I doing wrong?

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• Given two sets of DNA, what does it take to computationally "grow" that person from a fertilised egg and see what they become? [closed]

  - by Nicholas Hill

  My question is essentially entirely in the title, but let me add some points to prevent some "why on earth would you want to do that" sort of answers: This is more of a mind experiment than an attempt to implement real software. For fun. Don't worry about computational speed or the number of available memory bytes. Computers get faster and better all of the time. Imagine we have two data files: Mother.dna and Father.dna. What else would be required? (Bonus point for someone who tells me approx how many GB each file will be, and if the size of the files are exactly the same number of bytes for everyone alive on Earth!) There would ideally need to be a way to see what the egg becomes as it becomes a human adult. If you fancy, feel free to outline the design. I am initially thinking that there'd need to be some sort of volumetric voxel-based 3D environment for simulation purposes.

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• Problem with Using chntpw in Ubuntu to reset Windows 7 Password

  - by sandesh yadav

  I tried resetting the password of windows 7 Using 'chntpw' command in Ubuntu . It showed success . But when I try to login from Windows it does not seem to be changed. I first used live USB of ubuntu 11.10 and did ''Try Ubuntu''. Then I did sudo apt-get install chntpw and then cd /media/Vista/Windows/System32/config sudo chntpw -u username sam . I did according to this link . http://www.psychocats.net/ubuntucat/resetwindowspasswordold/ and got success like this. Hives that have changed: Name 0 Write hive files? (y/n) [n] : y 0 – OK . But when I try to login to windows with blank password , I could not login. I also tried changing the password and showed success but I could not login with that password . Thank you . Any help is very much appreciated.

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• VMWare Player pauses often

  - by pascal

  I'm using a 64bit Windows 8 inside vmplayer, with 2 virtual processor cores, virtual hard disk resides on a fast local disc and is not preallocated; host CPU is Intel i7 3770, should be capable of hardware virtualisation but I don't know if VMWare uses it; NAT networking; Sound card connected, USB connected, accelerated 3D graphics (NVidia 313.30 on host) My problem is, that the VM often pauses for a few seconds, and then speeds up for a few seconds to reach real time again. Time in the VM actually moves faster after the pause, for example all animations using timers speed up. When running, the vmware-vmx process shows ~150% CPU usage in top, but 0% when pausing (and D state i.e. waiting for IO). iotop shows normal disk writes from vmware-vmx threads, but during pauses, the flush kernel thread uses 99%. Are there some options to try so that VMWare doesn't wait for IO? I've tried a few things available from the GUI but the issue never went away…

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• Ubuntu will not start any more !!!!!!!! PLEASE HELP?

  - by mike

  I really need help , I left my computer downloading all the night and i did donwload 35 go of movies ( legal ....) , I restart the computed in the morning then i booted in my encrypted windows partition for my work. Surprise in the evening when i try to boot on linux again , then it doesnt start as it's telling me low graphic mode , and doesnt boot( happen when it's really full ) . Tryed in rescue and it's telling me i have 0 mo free. Tryed in shell comand sdo root rm - Some files IMPOSSIBLE . it's telling me that my files are only in read only file systems. I mouted my other hard drive in windows as well but there is a '' Write protection '' i can only read the files. Please let me know , what solution do i have ? Should i try live usb with ubuntu ? Thanks guys

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• After reinstalling ATI graphics drivers, my keyboard and mouse aren't working anymore

  - by Lifelike27

  On Ubuntu 11.04 I tried to install the open source drivers for my laptops ATI Mobility Radeon 5470M but I messed that up a bit and lost xserver. Now I've managed to solve that problem with this and by downloading the ATI proprietary drivers and install those manually. Now, when Ubuntu loads up I get to the login screen but I can't use my mouse or my keyboard (usb keyboard and mouse doesn't work either). If I use the recovery console, then login with that and then run 'startx'. I can login fine (though Unity doesn't show, the graphics seem to be working because it shows the fading animation of libnotify), but I can't type or move my mouse.

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• Why does Files (Nautilus) stopped updating partition's bookmarks?

  - by YuriC

  I've upgraded from 13.04 to 13.10 and noticed that Files (Nautilus) stopped updating my bookmarks that are located in another partition (an ext4 one). It used to work before. Testing, I've found out that, if I add any new bookmark (using CTRL + D, for example), Files then adds this new one and updates all bookmarks, showing that ones that point to my partition. I conclude that the feature (updating bookmarks) works, but it's not being executed when I mount my partition clicking on it. Any hints on how to solve this? Bookmarks really speed up everyday activities.

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• After installing Windows XP I can't boot into Ubuntu 12.04 LTS

  - by Osama

  I know that this issue may have been happened to many people and answered many times. For some reason, I had to install Windows XP beside Ubuntu 12.04 LTS. Once I did that, I'm no longer able to log on to my Ubuntu. The booting list screen doesn't show up. I tried some ways to fix that, one was to try Boot Repair (of course after opening Ubuntu live from a USB), however, the program didn't open after the installation had finished !! So how can I fix that? I hope you guys stick a little with my problem until it is solved

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• How to handle jumping up a slope in a runner game?

  - by you786

  In an 2D endless runner, what should happen when the player is running "too fast" up a slope and jumps? For example, in a "normal" case: .O. . __..O_____ . / . / O/ _/ If he is moving to the right slowly enough, he will jump upwards and land on the flat part of the surface. However, if he is moving too fast, the jump will have no effect as his forward motion will bring him back in contact with the slope before he can get high enough to pass over it. When the speed is sufficiently high, there will effectively be no jump. _________ / .O/ O/ _/ Are there any known ways to solve this issue? I know it's physically correct*, but are there techniques that other games use to overcome this in a reasonable manner? As a last resort I'll have to just remove all slopes that are too slanted. *If you constrain the player to never jumping backwards.

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• How to change keyboard sleep button to hibernate?

  - by Allu2

  I have a keyboard with a "sleep" button that does indeed make my computer go to sleep. The problem is that Ubuntu can't really handle sleep on my computer, causing it go into a non-responsive mode, having the CPU fan spinning at full speed and it stops receiving any input. Hibernation instead works mainly as it should. I would like to set the sleep key to hibernate, but the keyboard settings' hotkeys tab doesn't have this "sleep" keybinding and though I could make new one with hibernate --force as the command, it would require root rights to run. How can I change the keyboard sleep button action to hibernate?

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