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• Recently purchase a Linode server. Wondering how to keep track of modifications

  - by eveo

  I purchased a server for the sole purpose of familiarizing myself with the CLI so I don't get royally screwed when I enter a real development environment. However, I have some questions. I've managed to SSH into my server, all is fine and dandy, installed LAMP too which went flawlessly. Now I'm wondering, the more changes I do, the more cluttered my server will become. Can I revert changes? I don't want to keep customizing things and installing things and just having a cluttered server overall. Where can I track changes to my system?

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• Can't install ubuntu 12.04 64 bit and 32 bit

  - by Mark

  I downloaded The Ubuntu 12.04 64 bit, i burned it from a cd and when I tried to install it i only and get a black screen and saying Peter Arvin et al could not find kermel image I thought there's a problem with the file so i downloaded it again and install it then i always get the same message. I tried also 32 bit and i always get the same error. I tried also installing it from a usb and i always get the same. So i just downloaded the WUBI and works so fine to my computer. I'm using Sony Vaio E Series with a 32 bit system and 500 GB hard Disk Drive.

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• Unable to mount location, Can't mount file

  - by user116008

  I'm a new user to Ubuntu and I have a problem: I had Windows XP in my computer and I had two partitions: C (for system data) and D(for my personal stuff), then, during the Ubuntu installation I chose the Advanced Settings and formated C partition and left D partition intact, went back and chose Install Ubuntu and replace Windows and it installed fine. The problem is that now I open Nautilus and go to Computer, in there it shows my D partition, 640 Hard Disk, but when I try to mount it displays me a message: "Unable to mount location. Can't mount file". I ask you to explain me step-by-step what I need to do because I'm not an advanced user. My computer specs: 2 GiB RAM, Proccesor Pentium(R) Dual-Core CPU E5400 @ 2.70GHz × 2, Graphics Unknow (It's Nvidia GeForce 220 {1GB} or something), OS type 32-bit, Disk 628.0 GB P.S.: My HDD is internal, I'm not using external Hard Drives. Thank You!!! Mike

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• Closing lid does not suspend laptop

  - by fgysin

  I'm on a Lenovo T400 laptop. In the past I had suspend problems on every second version of Ubuntu (at least it feels like it), but in 11.04 it was working perfectly. Now, after the upgrade to 11.10 closing the laptop lid does no longer initialize suspension. When I choose 'Suspend' from the shutdown menu it works perfectly, so this does not seem to be an issue with suspend itself. The options in System Settings>Power are of course set to suspend in case of closing the lid (both for battery and AC poer). Note: I have no idea if this is of any importance, but I'm running the gnome-session-fallback stuff, as I just hate the Unity desgin.

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• What options are there for splitting UI layout from code logic using a markup language?

  - by Daenyth

  What tools similar to GWT's UIBinder exist in other languages? By this I mean a system where you can define your UI layout in a markup language (preferably html+css) and attach the functionality to the layout using the code. I'm most interested in anything for python, but answers in other languages would interest me as well. I'm interested because the benefits of having a non-programmer work directly on the layout without needing to touch the code and adjust a bunch of UI toolkit method calls is very productive. I'm aware of Flex for flash, but is there anything else out there? What search terms might I use to find such frameworks? I've looked around but I haven't found anything concrete.

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• Launchpad fails to build a package for my PPA

  - by AZorin

  I'm trying to build a package on Launchpad's Debian build system for PPAs but I'm having some issues with a certain package. The package I'm trying to build (zorin-xwinwrap) contains a source C file which I'm trying to get to compile and build on Launchpad's server so that it would install and work on 32 bit (i386) and 64 bit (amd64) systems. Unfortunately I keep on getting an Error code 2 with the debian/rules file and I have no clue how to fix this issue. The following link is the source package of the software I'm trying to add to my PPA: http://goo.gl/GjZvd The following link is the buildlog for the failed package on Launchpad: http://goo.gl/6A2rQ I would greatly appreciate any suggestions if anyone may have any. Thank you for your time.

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• What is default username & password for a persistent pendrive?

  - by sdos

  I am trying out Ubuntu 11.04 on a netbook. I created a live USB to boot from using this: http://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/ and the system boots up into Ubuntu from the USB stick, great! bad news is I am presented with a login form.... I did not set a password so I have no idea what it could be.... username: other password: I have tried no password, no luck... I tried ubuntu, no luck Any Ideas why it has a password, and what it might be or how I can set the password?

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• My wife has left me . . .

  - by fatherjack

  LiveJournal Tags: Leaving,Colleagues She announced it before Christmas, in a letter, giving the exact day she intended to leave and what she had planned for her future. We met 8 years ago. We were looking for a data administrator for a CRM system in the company and she was the stand out candidate. She got hired. We got married. In the last eight years we have lived and worked together in an excellent partnership, we have talked work whilst commuting, over dinner and sometimes on holiday. We...(read more)

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• Xubuntu LightDM shows blank screen half the time

  - by Sman789

  System info: (will be amended if any more info is asked for) My laptop runs Xubuntu 12.10. As it has a Solid State Drive, /tmp, /var/tmp, /var/log and /var/log/apt are set to tmpfs in the /etc/fstab file - in case this makes any difference. Problem My problem is quite simple. Approximately 50% of boot attempts end in the mouse cursor on a black screen (presumably LightDM failing to load), forcing me to restart and try again. I can access the CTRL+ALT+F1 terminal to reboot the machine, but it's very annoying having to boot and reboot two or three times before one works. Oh, and this problem is the same whether I use the Xubuntu or Unity greeter. Thanks for any help you can give.

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• OOW 2012: Slides Download

  - by Mike Dietrich

  Hm ... you might ask yourself why there are no Oracle Database 12c slides available for download, neither in the OOW 2012 content system nor on our blog (and I believe nowhere else). Simple reason: As long as Oracle Database 12c is not released and available we are not allowed to offer slides for download. Therefore people were simply taking pictures during the 12c sessions with their phones, iPods and cameras. Roy took a nice shot: Sorry for that - we'll make the content available as soon as Oracle Database 12c gets released. In between you can download our OOW 2012 talk Database Upgrades on Steroids: Real Speed, Real Customers, Real Secrets as PDF (3.4MB) - but the 12c content is currently not in that PDF. But a lot of information applies to your source database and/or to any upgrade - so it still might be helpful. And unfortunately the same 12c rule applies to the slides guiding you through our Hands-On-Lab on Tuesday. Thanks

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• understanding computers [closed]

  - by Ashwin

  Possible Duplicate: Good resources to understand how a program interacts with machine hardware I don't know if this is the correct StackExchange site to ask this question. But I could not find any other. I want to understand how a computer works from the software level to the internal structure. For example what happens when I press a button on keyboard. The OS interprets it and then what changes happen in the flip-flops. How is an operating system written? If it is written using some programming language, then how is that interpreter written. At some point it has to come down to the hardware, right? I know to program in c, c++ and java. But after all these years I am still not sure about what is happening inside. I would be grateful to anyone who points me to to a link or a video that explains this to the deep.

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• Can't access my partitions after installing Ubuntu

  - by Manaf Al-Sarraf

  I installed Ubuntu 13.4 replace with win 8 after installation complete I can't access my partitions and receive a message like this : Error mounting /dev/sda5 at /media/manaf/01CD6C0800CEE670: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sda5" "/media/manaf/01CD6C0800CEE670"' exited with non-zero exit status 14: The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Failed to mount '/dev/sda5': Operation not permitted The NTFS partition is in an unsafe state. Please resume and shutdown Windows fully (no hibernation or fast restarting), or mount the volume read-only with the 'ro' mount option." Thanks for helping :)

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• Creating a user called 'root'

  - by pnp

  I am creating Virtual Machines using the ubuntu-vm-builder. The syntax goes something like this: ubuntu-vm-builder kvm precise \ --domain newvm \ --dest newvm \ --arch i386 \ --hostname hostnameformyvm \ --mem 256 \ --user john \ --pass doe \ --ip 192.168.0.12 \ --mask 255.255.255.0 \ --net 192.168.0.0 \ --bcast 192.168.0.255 \ --gw 192.168.0.1 \ --dns 192.168.0.1 \ --mirror http://archive.localubuntumirror.net/ubuntu \ --components main,universe \ --addpkg acpid \ --addpkg vim \ --addpkg openssh-server \ --addpkg avahi-daemon \ --libvirt qemu:///system ; I need to enable the 'root' user account after creating each of my VMs (and supply a password for it). I was just wondering whether I can take this short-cut of supplying the username (--user) as root in this command itself. If I supply username as root to create my VMs, am I creating/enabling the root user, or just creating a user named as root? p.s.: any better ways to achieve my task are also welcome. But I don't want to manually meddle with each VM after its creation

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• G5 quad core will not boot from Ubuntu CD

  - by Steve Howard

  I have a PPC G5 Quad Core with Leopard on one hard drive and I want to install Ubuntu on a second hard drive. The second drive is installed and formatted as a Mac OS Extended (Journaled) drive. I have had no success booting from a CD or DVD with various PPC versions of Ubuntu using any of the suggested keys such as "C, Option, or anything else. Booting into open firmware doesn't work as the system can't find the \install\yaboot file. I am using various CD's burned as iso disk images, but none will boot. I have reset the PRAM, etc, to no avail. Beginning to get very frustrated. Can someone shed some light and provide me with a command line in open firmware that will work, or else direct me to a confirmed PPC bootable version of Ubuntu please? I'd appreciate any help you can provide....

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• What Application Indicators are available?

  - by user8592

  I installed Ubuntu 11.04 on one of my systems and I am using the Unity interface. Unity is working quite well so far but I really miss panel applets for net speed, cpu temp, and system monitor. These applets are useful for viewing quick info. Unlike 10.10, there is no other way to get this info onto the panel or unity launcher. There are solutions like screenlets and conky but they don't feel appropriate for a clean desktop look. If you know one then please list out any third party indicators with links so that they can be found.

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• Printing Problem on Shared Printer

  - by paulus_almighty

  I'm using Ubuntu 11.10 on two machines. One has a USB printer connected. I want to share this printer with the other over the wireless network. Under Printing > Server > Settings: I have Publish shared printers connected to this system and Allow printing from the internet enabled. All other checkboxes are disabled. When I right click on the printer icon, I can see enabled and shared are ticked. On my other machine, I can now click on add network printer. It finds the machine name of the server and correctly identifies the printer. However, print test page fails. Under printer properties the printer state says: Processing - Unable to connect to printer; will retry in 30 seconds... What's gone wrong?

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• upgrade from ubuntu 12.04 to 12.10 failed, now loads "grub rescue"

  - by Greg

  I attempted to upgrade from 12.04 to 12.10 last night. Installation seemed to go fine, and this morning I had a message like "restart now to complete installation". So I restart, get an initial "Loading Operating System ..." message, followed by "error: file not found. Then it kicks into "grub rescue" mode. Previously I have this running as a dual boot (window 7) and I just ran the upgrade to 12.10 via the update manager in ubuntu. Any ideas on what is going on here, or what the error means? I know my way around the command line, but this is above my pay grade. Thanks for any advice.

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• Install Ubuntu 12.04 on Drive "D"?

  - by Bill Jones

  I have a Dell Inspiron 531S that originally came loaded with Windows Vista. A couple years ago I purchased a copy of Windows 7, formatted the hard drive and installed the updated operating system. In the process I formatted the 10 GB recovery drive partition on drive D as it was no longer needed for Windows Vista. I would really like to install Ubuntu 12.04 LTS alongside Windows 7 using the empty 10 GB drive D:. I have two questions. (1) Can Ubuntu be installed on a separate partition, a drive removed from the boot sector on drive C:? (2) If so would Grub be installed in the boot sector and properly select Windows 7 on drive C: or Ubuntu 12.04 on drive D?

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• Is it wrong to use a boolean parameter to determine behavior?

  - by Ray

  I have seen a practice from time to time that "feels" wrong, but I can't quite articulate what is wrong about it. Or maybe it's just my prejudice. Here goes: A developer defines a method with a boolean as one of its parameters, and that method calls another, and so on, and eventually that boolean is used, solely to determine whether or not to take a certain action. This might be used, for example, to allow the action only if the user has certain rights, or perhaps if we are (or aren't) in test mode or batch mode or live mode, or perhaps only when the system is in a certain state. Well there is always another way to do it, whether by querying when it is time to take the action (rather than passing the parameter), or by having multiple versions of the method, or multiple implementations of the class, etc. My question isn't so much how to improve this, but rather whether or not it really is wrong (as I suspect), and if it is, what is wrong about it.

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• Booting from USB only

  - by vivek

  I am a newbie on linux and dont understand many things unless given a line by line instructions. I am trying but linux does take some getting used to. I have installed ubuntu from live usb stick. Now I cannot boot my system without the usb being plugged in. There are answers whereby certain commands need to be run. For any command that I run with sudo (prefix) the terminal asks me for a password which I dont know. What do I do? How do I fix it such that the booting happens without usb being plugged in. So far I have just been booting from USB. Please help a recent converted from Windows. Thanks all

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• What You Said: The First Things to Do After Installing a New OS

  - by Jason Fitzpatrick

  Earlier this week we asked you to share the steps you went through after installing a new operating system. You responded and we rounded up your responses. Our Ask the Readers series gives you, the awesome How-To Geek reader, a chance to share your tips, trick, and technological know-how with your fellow readers right on the front page. Every week we ask a question and every week we round up your tips to share. This week we’re taking a look at your tips and tricks from What’s the First Thing You Do After Installing a New OS.HTG Explains: What’s the Difference Between the Windows 7 HomeGroups and XP-style Networking?Internet Explorer 9 Released: Here’s What You Need To KnowHTG Explains: How Does Email Work?

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• How to deal with "software end-of-life" situations?

  - by rwong

  When a vendor declares that they no longer intend to provide any support or services to a piece of software (and stated the intent to exit the business - offering no upgrade paths), and stated that customers must pay a nominal fee in order to have the existing data exported, what kind of recourse do programmers/customers have? Things I can think of: Need to purchase spare hardware and set up a spare environment on which the software can continue to operate. Various data export methods which do not require vendor involvement. (For example, screen scraping, printing to image followed by re-scanning, etc) Parallel systems where staff will duplicate the old data into a new system manually or semi-automatically Legal means, in case the vendor is in financial trouble Any other ideas? Assuming that there is no "circumvention" involved (no DRM, no DMCA), is data recovery or reverse engineering legal/acceptable?

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• No sound in any web browser(s)

  - by shaneo

  Hello I recently tried to compile and update alsa from source via this guide http://www.stchman.com/alsa_update.html. Afterwards the sound in any web browser I open Firefox, Opera, Chrome, Chromium, Iron there is no sound on any pages. I went back through the script listed on the site and found where it had installed the drivers and deleted it and than re-installed alsa via synaptic. Though I still have no sound in my browser(s). All system sounds work as they are supposed to only web sounds don't work. Here is my alsabase.conf http://paste.ubuntu.com/1073135/ also a snapshot of alsamixer Any assistance would be greatly appreciated. Thank You and let me know if any more information is required.

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• Is there a way to continue a partially finished MinGW build?

  - by vsz

  I am just trying to become familiar with MinGW (and with more complex command-line compiler tools) I have a really giant project to build, I successfully managed to generate the makefile with CMake, and started mingw. After more than an hour of hard work, and building dozens of libraries successfully, the build ended in an error. It seems I added an option in CMake which is not supported in my system. My problem is, I cannot figure out a way to just skip that library and continue with the build process. If I remove the option in CMake and start mingw again, it starts from the beginning and rebuilds everything, even those libraries which are already built.

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• Is there a limit on the number of threads that can be spawned simultaneously?

  - by georgesl

  Yesterday I came across this question: How can i call robocopy within a python script to bulk copy multiple folders?, and I though it might be a good exercise for multithreading. I though of spawning as many threads as files needed to be copied, each routine having an exception handling system to prevent the whole copying process from crashing (and log -using mutex on the log file - if there was an error). My question: Is there a limit on the number of thread you can spawn almost simultaneously? If yes, what is the limiting factor? My question is focused on PC desktop, but I welcome any answer on different hardware (embedded systems, calculus clusters, etc.).

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