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  • I cannot login into any TTYs

    - by Lucio
    My system is Ubuntu 11.10. When I enter into any tty (1, 2, 3..) it ask me my login name and password but I can not move forward. It say that the info isn't correct. I have a user without password called world, so I enter world but it show me this Module invalid (or similar) The problems is that I must enter a command and I can't. There isn't any way to fix or an alternative way to enter the command?

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  • Calling all developers building ASP.NET applications

    - by Laila Lotfi
    We know that developers building desktop apps have to contend with memory management issues, and we’d like to learn more about the memory challenges ASP.NET developers are facing. To be more specific, we’re carrying out some exploratory research leading into the next phase of development on ANTS Memory Profiler, and our development team would love to speak to developers building ASP.NET applications. You don’t need to have ever used ANTS profiler – this will be a more general conversation about: - your current site architecture, and how you manage the memory requirements of your applications on your back-end servers and web services. - how you currently diagnose memory leaks and where you do this (production server, or during testing phase, or if you normally manage to get them all during the local development). - what specific memory problems you’ve experienced – if any. Of course, we’ll compensate you for your time with a $50 Amazon voucher (or equivalent in other currencies), and our development team’s undying gratitude. If you’d like to participate, please just drop me a line on [email protected].

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  • System does not detect USB pendrives

    - by cshubhamrao
    This USB thing is driving me crazy. 2 problems in time span of 3 hours. Ok I was already trying to cope up with "wrong fs type, bad option, bad superblock" error while mounting FAT Drives when to my amazement I discovered that none of the USB Storage devices showed up in the system Useful outputs: - tail /var/log/syslog: root@shubham-pc:~# tail /var/log/syslog Nov 7 21:41:47 shubham-pc colord: device removed: sysfs-HP-v250w Nov 7 21:41:51 shubham-pc kernel: [ 3441.529542] usb 1-1: USB disconnect, device number 11 Nov 7 21:41:53 shubham-pc kernel: [ 3443.820029] usb 1-2: new high-speed USB device number 14 using ehci-pci Nov 7 21:41:54 shubham-pc kernel: [ 3443.952897] usb 1-2: New USB device found, idVendor=0781, idProduct=5530 Nov 7 21:41:54 shubham-pc kernel: [ 3443.952905] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Nov 7 21:41:54 shubham-pc kernel: [ 3443.952909] usb 1-2: Product: Cruzer Nov 7 21:41:54 shubham-pc kernel: [ 3443.952913] usb 1-2: Manufacturer: SanDisk Nov 7 21:41:54 shubham-pc kernel: [ 3443.952917] usb 1-2: SerialNumber: 20060876420EC6016847 Nov 7 21:41:54 shubham-pc mtp-probe: checking bus 1, device 14: "/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2" Nov 7 21:41:54 shubham-pc mtp-probe: bus: 1, device: 14 was not an MTP device

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  • problem in installing wireshark on ubuntu 12.04

    - by iqbal
    i tried to install wireshark on ubuntu 12.04 but when i enter the cod the message is whone to me is iqbal@iqbal-HP-ProBook-4530s:~$ sudo apt-get install wireshark Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wireshark : Depends: wireshark-common (= 1.11.4+svn20140420104827~d0489f2a-0ubuntu1~precise1~ppa0) but it is not going to be installed E: Unable to correct problems, you have held broken packages so how can i install wireshark on ubuntu 12.04 if any one can please tell me thanks

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  • Unable to connect to wireless network

    - by Mike
    A real newbie here. Just downloaded Ubuntu 12.10, put on USB stick and have booted it on my other PC after modifying the boot sequence to boot from USB before hard drive where Windows XP lives. Have no problems with Windows and my wireless but not with Ubuntu. The PC is a Dell Latitude D630 laptop. According to Windows XP , the wireless card is a Dell Wireless 1490 Dual Band WLAN Mini-Card, my IP address is 192.168.0.193, subnet mask is 255.255.255.0, assigned by DHCP, SSID is HOME , type 802.11 and default gateway is 192.168.0.1. Ok, back to booting from USB and TRY option, I am Editing Network connections, I have created/configured "Wireless connection 1" with SSID of HOME and the only other thing I have changed is on the "Editing IPV4 routes for Wireless connection 1 I have enterred 192.168.0.193 , netmask 255.255.255.0 and gateway 192.168.0.1 Anyways , no go. Could use some help. Thanks, Mike from Montreal

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  • How to find corrupted files?

    - by rafalcieslak
    Some files on my hard drive are corrupted (no worries, nothing system-related, just a junk of data files, mp3 etc.). I found that out when I tried to burn them all to a DVD, the burning application show a message that it cannot read the files as they are corrupted. [This is probably a drive issue, it had happened me once or twice already]. I don't care about recovering them, but I have to determine which ones are corrupted. I cannot check by manually opening them all, as there are thousands of them. Is there any tricky way to check all the files and list the ones that may cause problems when tried to open?

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  • How do you navigate and refactor code written in a dynamic language?

    - by Philippe Beaudoin
    I love that writing Python, Ruby or Javascript requires so little boilerplate. I love simple functional constructs. I love the clean and simple syntax. However, there are three things I'm really bad at when developing a large software in a dynamic language: Navigating the code Identifying the interfaces of the objects I'm using Refactoring efficiently I have been trying simple editors (i.e. Vim) as well as IDE (Eclipse + PyDev) but in both cases I feel like I have to commit a lot more to memory and/or to constantly "grep" and read through the code to identify the interfaces. As for refactoring, for example changing method names, it becomes hugely dependent on the quality of my unit tests. And if I try to isolate my unit tests by "cutting them off" the rest of the application, then there is no guarantee that my stub's interface stays up to date with the object I'm stubbing. I'm sure there are workarounds for these problems. How do you work efficiently in Python, Ruby or Javascript?

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  • DOT implementation

    - by Denis Ermolin
    I have some DOT(damage over time) implementation problems. My game runs on 30 FPS speed. Current implementation is: let's say hero cast spell which make 1 damage per second. So on every frame i do (pseudo code): damage_done = getRandomDamage() * delta_time; I accumulate damage and when it becomes more then 0 then subtract rounded damage from current health and so on. With 30 FPS and 1 DPS it will be 1/33 = 0.05... We know that floats a not precise enough to sum 30 circulating decimals and have exact 1 in the end. But HP is discrete value and that's why 1 DPS will not have 1 damage after 1 second because value will be 0.9999..... It's not so big deal when you have 100000 DPS - +/- 1 damage will not be noticeable. But if i have 1, 5 DPS? How modern RPG's implemented DOT's?

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  • How do you handle increasingly long compile times when working with templates?

    - by Ghita
    I use Visual Studio 2012 and he have cases where we added templates parameters to a class "just" in order to introduce a "seam point" so that in unit-test we can replace those parts with mock objects. How do you usually introduce seam points in C++: using interfaces and/or mixing based on some criteria with implicit interfaces by using templates parameters also ? One reason to ask this is also because when compiling sometimes a single C++ file (that includes templates files, that could also include other templates) results in an object file being generated that takes in the order of around 5-10 seconds on a developer machine. VS compiler is also not particularly fast on compiling templates as far as I understand, and because of the templates inclusion model (you practically include the definition of the template in every file that uses it indirectly and possibly re-instantiate that template every time you modify something that has nothing to do with that template) you could have problems with compile times (when doing incremental compiling). What are your ways of handling incremental(and not only) compile time when working with templates (besides a better/faster compiler :-)).

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  • Motivation and use of move constructors in C++

    - by Giorgio
    I recently have been reading about move constructors in C++ (see e.g. here) and I am trying to understand how they work and when I should use them. As far as I understand, a move constructor is used to alleviate the performance problems caused by copying large objects. The wikipedia page says: "A chronic performance problem with C++03 is the costly and unnecessary deep copies that can happen implicitly when objects are passed by value." I normally address such situations by passing the objects by reference, or by using smart pointers (e.g. boost::shared_ptr) to pass around the object (the smart pointers get copied instead of the object). What are the situations in which the above two techniques are not sufficient and using a move constructor is more convenient?

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  • Is it possible to remove a particular host key from known_hosts?

    - by Kaustubh P
    I usually end up deleting the entire known_hosts file, which I have no problems for. But just out of curiosity, Is it possible to remove just a single entry? I opened the known_hosts file, and other han understanding that the file contains fingerprints for a given machine, I ddnt understand anything. Below is the message I faced, which led me to ask this question. Add correct host key in /home/wissen16/.ssh/known_hosts to get rid of this message. Offending key in /home/wissen16/.ssh/known_hosts:1 RSA host key for foo.com has changed and you have requested strict checking. Host key verification failed. Thanks.

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  • ejabberd starts slow and fails

    - by Michael Tanner
    I installed ejabberd and tried to set it up. On my server there are strict rules which allow only several services and denies everything else. I experienced starting problems with my iptables rules and found out that ejabberd works when I allow everything in the iptables and restore my rules afterwards. Then it also works for connecting, registering and else. What could be the problem in my rules? Attached here: http://fixee.org/paste/s5s744j/ Would be nice to get a correction straight on fixee if I made a mistake. Thanks in advance. Edit 1: In the log files there are no specific error messages during startup.

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  • Functional Programming - Does Knowing It Help Job Prospects?

    - by Jetti
    The main language that I use at the moment is C# and I am the most comfortable with it. However, I have started dabbling in F# and Haskell and really enjoy those langauges. I would love to improve my skills in either of those languages over time since it truly is fun for me to use them (as opposed to Ruby, which is hyped as "fun", I just don't get where the fun is, but I digress...). My question is directed at those who have hired/interviewed for programming positions (junior/mid-level): if you see a functional programming language on a resume, does it affect your opinion (whether positive or negatively) of that candidate? My rationale for knowledge of functional programming affecting the view of a candidate is because it can show that the candidate can adapt to different methodologies and take a mulit-dimensional approach to problems rather than the "same old OO approach". (This may be off-base, please let me know if this assumption is as well!)

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  • Volume setting isn't remembered after restart/shutdown

    - by Iulian
    This is my first time here and I'm new to linux and also to Ubuntu. I've installed first version 11.10 and there was some problems with the unity dock and also the problem with the volume not being remembered after restart or shutdown. I'm using dualboot with Windows 7. Ubuntu was installed after windows. I have 2 sound cards. One is onboard, on the motherboard, and the other is external, an E-MU 0404 USB 2.0 sound card. The last one is my primary sound card and I've choosed it as default output sound card. I've upgraded to 12.04 hopeing that this was fiex but even in this version the OS doesn't keep the volume where it was last time. The big problem is that sometimes I forget about this problem and start music and it starts at full volume and soon I think I will die of heart attack. Is there a way to make it remember or at least to tell him to start at a specific volume not at 100%?

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  • Cant install wine1.5 13.04

    - by Drew S
    So I tried to install wine 1.5 a few times, I got 1.4 installed, and 1.6 installed oddly enough, I completely removed and purged all wine and still nothing. I installed ia32-lib and still nothing, tried installing from synaptic, ubuntu software center, and apt-get method. I get this error from apt-get in the terminal Reading package lists... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help resolve the situation: The following packages have unmet dependencies: wine1.5 : Depends: wine1.6 but it is not going to be installed E: Unable to correct problems, you have held broken packages. The particular windows program I want to install is confirmed working in 1.5(have it working on laptop)

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  • SOA Suite 11g: Unable to start domain (Error occurred during initialization of VM)

    - by Chris Tomkins
    If you have recently installed SOA Suite, created a domain and then tried to start it only to find it fails with the error: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. the solution is to edit the file <domain home>\bin\setSOADomainEnv.cmd/sh (depending on your platform) and modify the line: set DEFAULT_MEM_ARGS=-Xms512m -Xmx1024m to something like: set DEFAULT_MEM_ARGS=-Xms512m -Xmx768m Save the file and then try to start your domain again. Everything should now work at least it does on the Dell Latitude 630 laptop with 4Gb RAM that I have. Technorati Tags: soa suite,11g,java,troubleshooting,problems,domain

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  • HTG Explains: How System Restore Works in Windows

    - by Chris Hoffman
    System Restore is a Windows feature that can help fix some crashes and other computer problems. To know when to use it, you’ll have to understand just how System Restore works. System Restore can’t solve every problem – for example, you can’t use it to restore your personal files if they’re accidentally deleted or modified. However, it’s another tool you can use when your computer isn’t working properly. HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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  • Why is the file /var/crash/_usr_lib_empathy_empathy-chat.1000.upload empty?

    - by user43816
    I just experienced an unusual crash: I tried to click on a name entry in the contact list of Empathy. A crash happened. Usually I am asked then if I'd like to report the error to Launchpad, and Launchpad opens. This time the error message was: "Excuse me. Ubuntu 12.04 noticed an internal error. If you notice further problems try to restart your computer. Send an error report to Launchpad to help removing this problem?" This time Launchpad did not open automatically. A new window opened and I could read the relevant error report. Later I found the error report in the file /var/crash/_usr_lib_empathy_empathy-chat.1000.crash. Why went the course of action this time differently from other crashes? Why is the file /var/crash/_usr_lib_empathy_empathy-chat.1000.upload empty?

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  • Compilable modern alternatives to C/C++

    - by Jeremy French
    I am considering writing a new software product. Performance will be critical, so I am wary of using an interpreted or language or one that uses a emulation layer (read java). Which leads me to thinking of using C (or C++) however these are both rather long in the tooth. I haven't used either for a long time. I figure in the last 20 years someone should have created something which is reasonably popular and is nice to code in and is complied. What more modern alternatives are there to C for writing high performance code compiled code? edit in response to comments If C++ is a different beast than it was 15 years ago, I would consider it, I guess I had an assumption that it had some inherent problems. Parallelisation would be important, but probably not across multiple machines.

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  • No root partition

    - by christian ashton
    I'm having serious problems trying to install ubuntu 14.04 on my Toshiba Satellite C850 laptop. Whenever I try to install it it says "No root file system found. Please correct this error from the partitioning menu." I've tried to create new partitions but I don't know what size to make them etc. can someone please help me on this? (Is there a way to create partitions through the terminal? I'm new to ubuntu) but i was on it 2 days ago, laptops crashed and now I can't get past the installation. I've created a new partitioning table just need guidance on which partitions to create and how big to make them. I have absolutely no partitions whatsoever on my hard drive (or whatever the partitions are part of) so it will need to be from the very start. Thanks in advance!

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  • Does Ubuntu run well on an USB HDD?

    - by Klaus
    I have here a company notebook, and because the HDD is full encrypted, I cannot install an extra partition for another system that I would like to use in my free time. And I really need another system, because this crap Windows here with that much of anti-virus, anti-spyware, anti-whatever on it is so slow and annoying. What can I do? I could use an external USB HDD with another system. Because I would like to handle big files and so on, I don't want to use a USB stick. A USB 2.5 HDD + Ubuntu is what I think the best option. Here are my questions: Do I have to note something? Does Ubuntu run well on an external HDD? Do I have big performance problems (because of the USB HDD)? Should I buy a very fast HDD for much money or it is not that important? Any suggestions?

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  • Why dosn't Ubunto like my HP Pavilion G7?

    - by user109379
    I installed Ubunto onto my HP Pavillion G7 1330dx without much problem, but it took 3 or more tries to get it to boot up after. Then , I started over and installed Mint, no problems installing or booting up. BUT, I decided I I liked Ubunto better so I wiped my hard drive and installed Ubunto ( this time the 32 bit) ,It runs great once i finally get it to boot, it takes 3 or more tries again. Whats the deal? I really like it but really don't know what I'm doing. I've been a Windows guy until a couple days ago.

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  • Need help installing Wine onto Ubuntu 12.10x64

    - by user106241
    I have tried to install wine through the software center and terminal and I get this error. chris@ubuntu:~$ sudo apt-get install wine1.5 [sudo] password for chris: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wine1.5 : Depends: wine1.5-i386 (= 1.5.16-0ubuntu1) but it is not installable Recommends: gnome-exe-thumbnailer but it is not going to be installed or kde-runtime but it is not going to be installed Recommends: ttf-droid Recommends: ttf-mscorefonts-installer but it is not going to be installed Recommends: ttf-umefont but it is not going to be installed Recommends: ttf-unfonts-core but it is not going to be installed Recommends: winbind but it is not going to be installed Recommends: winetricks but it is not going to be installed E: Unable to correct problems, you have held broken packages.

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  • Unable to mount samsung galaxy S3 via USB

    - by dez93_2000
    Connecting as either MTP or PTP: neither allows one to see pictures saved as default by phone camera to DCIM folder on external SD card. Similar problems with previous models (e.g. S2) were solvable by 'usb utilities' in wireless & networking settings, but this is no longer present. Other suggestions have mentioned uninstalling various libraries... but i don't wanna just start cutting stuff without knowing it'll help. Any thoughts? Seems like a pretty epic fail from google & samsung. There's not even a linux section on the relevant google site... despite android's usb driver being part of the linux kernel which powers android. Boo!

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  • Restoring windows path on Windows 7

    - by Renso
    Issue:You changed the windows path and made a mistake and now want to reset it.Solution:In short, you can't. If you restore to the system default, you will loose any paths that were appended when you or the manufacturer installed software and drivers. Each time you install some sort of software or driver, MS Office, Turbotax, etc., it creates/appends to the path so that it points to it's start-up program.Too late now, but you should create a restore point BEFORE you touch the windows path if you are not sure what you are doing:http://www.sevenforums.com/tutorials/700-system-restore.html http://www.sevenforums.com/tutorials/2083-system-repair-disc-create.html At a minimum you need the following:%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\AT worst you can reset it to the above, and go through each application as you use them and run into problems to fix the path. The REPAIR option when you select to change/uninstall a program can help with that.

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