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• How I install drRacket?

  - by aseed

  i install drRacket in ubuntu. downloaded the source file from http://pre.racket-lang.org/installers/ and typed sudo ./racket-5.2.1-bin-i386-linux-ubuntu-karmic.sh after making it exe file so the file is in the usr/racket/bin/drracket and i want to run it from command line without going to its directory i cant make the drracket to run the .rkt files by the "open with" how can i make this two things ???

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• How do I get a get the left pane of my GUI app to talk to the right pane?

  - by bas-brain

  I need help on developing a UI for a app. Basically this app will have do panels, left and right, lets say. On the left panel will be displayed customers and when I click on the customer name on the right will appear tabs with information, some kind of form with name, email, picture, etc. I already developed the left panel with DictionaryGrid which I could found on tutorials and so on, but no idea on the right panel which is the form side. Any help??? Just the idea and the development is with me, thanks very much

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• access denied when trying to open terminal on desktop

  - by chris

  ok so heres the skinny. I just moved some file using the sudo su command so i can move them to bin folder in file system then after closing terminal tried to reopen from desktop and got permission denied. I then rebooted and now i cant access my account and when trying to login it starts to boot then back to login screen. I then boot up in xterm and i get this message bash: /home/chris/.bashrc:Permission denied. I'm currently running xubuntu 10.04 and would like to get back in to that user. Can someone please help me. Not a noob but close to it. Thanks to anyone who helps and the quicker the better.

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• does not boot after install, my troubleshooting and google fu have failed me

  - by chris

  I can only get an install to "stick" if I use shred to zerofill my drive first. Otherwise, when I install ubuntu or lubuntu 12.04, I will get "grub rescue: out of disk". With the aforementioned (completely default) install on top of a zerofilled drive, then rebooting after installing updates will tell me there is no operating system. I don't even get to grub. Installing on top of the failed install, while choosing "erase ubuntu 12.04 and reinstall", I get the grub rescue: out of disk error. The hard drive has been repeatedly tested and does not have any read or write errors. I've used check disk for errors on the pen drive I'm installing from and it comes up clean as well. The system is an inspiron 6000, with 1gb ram and a 250 gb hard drive. I'm typing this from a live cd on the same machine. What gives?

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• How can I assign actions to all my mouse buttons?

  - by Torben Gundtofte-Bruun

  I have a mouse with lots of buttons, but it's not a mainstream make like Logitech. For Windows, I have a driver that lets me assign actions like close-window (Ctrl+W) or next-tab (Ctrl+Tab), but I don't have a Linux driver. Since Linux is so flexible, I thought perhaps there is a general way to do this, regardless of brand? Update: Based on input from Cyrex, I installed and ran sudo apt-get install btnx which found several but not all mouse buttons. Found: left, right, wheel, wheelclick, thumb fwd, thumb back. Not found: wheel left, wheel right, thumb middle button. Vendor ID is 0x04d9, Model ID is 0xa015. Update 2: In SystemPrefsMouse there's a lightbulb icon for testing double-click speed. Every working button can turn the bulb on&off, but the missing buttons can't. It would seem that Ubuntu isn't aware of these buttons and thus doesn't register their clicks. I guess I need to hunt for a driver, though a mainstream mouse is probably the easier way.

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• Installing Ubuntu 12.10 on new computer with Windows 8

  - by rft183

  I recently purchased a new HP computer (P6-2330) with Windows 8. I have tried unsuccessfully to install Ubuntu 12.10 64bit alongside Windows 8. The computer is UEFI with Secure Boot enabled. I've tried following the instruction at https://help.ubuntu.com/community/UEFI. I am able to get the GRUB menu to show up. However, as soon as I press Enter on either Try Ubuntu or Install Ubuntu, the screen goes blank. Nothing works at all, not even the Num Lock or Caps Lock keys on the keyboard. I have to use the power button to restart the computer. Does anyone have any suggestions on how to get Ubuntu installed? To clarify, I have actually tried installing using both a USB stick and a DVD. The USB stick gave a blank screen, while the DVD gave the error message "Empty Security Header" after pressing Enter at the GRUB screen.

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• Number of processes named 'doodle'

  - by Indian

  I have ben using 12.10 for a few days. Just upgraded it from 12.04. This comp of mine, which has a 4GB RAM and 64 bit intel processor, just goes slow randomly. When I press Ctrl+Alt+F6 and login through a command prompt, I see a number of processes using - ps -A I get many instances of a process named 'doodle' running. So many that I have to 'pkill' them by hand. Any idea why this is happening?

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• Ubuntu One stuck and doing nothing

  - by Laurence Nagel

  Ubuntu One has worked fine for me for several weeks and I now have 8.2 GB of files in the clouds. Then, last night, Ubuntu One stopped working. When I fire up System > Preferences > Ubuntu One, it tells me that I have 8.2 GB stored (13.2 %) and that my status is Unknown. I've tried to restart to no avail. I even tried to remove, followed by clearing the password keyring and starting over. Still nothing. I've run out of buttons to push.

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• eepc 100h ubuntu 12.04 external monitor higher resolution modes force a rotated display

  - by Acky

  Hi I have a eeepc 1000h netbook. I've just installed ubuntu. I mainly use an external display (samsung ta350 full hd 22 inch affair) but when I select 1080 from the dropdown list, my only options are for a rotated portrait. My neck's non too supple, so tilting my head for extended periods is not really viable. :-) Any ideas on making ubuntu display 1080 normal landscape? It must surely be possible. My gparted boot cd does it perfectly. Any help greatly appreciated. Cheers!

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• Application won't run when installed in "/opt"

  - by Sam Hewitt

  I've developed a program for the App Developer Showdown, with quickly, in python, and it works as expected when I package and install it normally -in /usr. However when packaged for installation in /opt it doesn't run -and I'm not getting (or can't find) an error message of any sort, as to what the problem might be. I was wondering if someone here has the answer. The app does require root access -using gksudo- to function. I'm fairly new to programming, but not to Linux. Thanks, Sam Launchpad: https://launchpad.net/aplomb

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• nvidia: switching dvi socket

  - by lurscher

  I have Ubuntu 10.10 x86_64 with Nvidia 9800 gt and Nvidia driver version 270.41.06 My video card has two DVI sockets, but I only use the single monitor configuration. Now, I think the main DVI socket might be busted, so I want to try to enable the other as the main one, however, I don't know how to achieve that. I tried just plugging the monitor in that socket but it won't auto-detect it (it would have been way too easy to just work). This is my xorg.conf: Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: builtin, VertRefresh source: builtin Identifier "Monitor0" VendorName "Unknown" ModelName "AOC" HorizSync 31.5 - 84.7 VertRefresh 60.0 - 78.0 ModeLine "1080p" 172.8 1920 2040 2248 2576 1080 1081 1084 1118 -hsync +vsync Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 9800 GT" EndSection Section "Screen" # Removed Option "metamodes" "1024x768 +0+0" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "CustomEDID" "CRT-0:/home/charlesq/lg.bin" Option "TVStandard" "HD1080p" Option "TwinView" "0" Option "TwinViewXineramaInfoOrder" "CRT-0" Option "metamodes" "1080p +0+0" SubSection "Display" Depth 24 EndSubSection EndSection

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• Why doesn't Mozilla release .deb and .rpm packages for their software?

  - by ushabtay

  i use and enjoy Firefox on my Ubuntu 10.04.2 laptop (although Firefox needs work for the Linux/Ubuntu version..) Yet i realize that in comparison to other pieces of software that have an "Ubuntu/Debian" version (.deb file, and usually .rpm files as well), i don't see it in one of the most profound assets of the FLOSS world. The Question is - Why? If Chrom/ium can - why can't they? Easier to get up-to-date software and features and so forth.. cheers,

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• How to install Edubuntu on a system with low memory (256 Mb)?

  - by int_ua

  I'm preparing an old system with 256 Mb RAM to send it to some children. It doesn't have Ethernet controller and there are no Internet access at the destination. I've chosen Edubuntu for obvious reasons and modified it with UCK trying to minimize memory usage just to install, let alone using it yet. But Ubiquity won't start even in openbox (edited /etc/lightdm/lightdm.conf) because there are no space left on /cow right after booting. I've already deleted things like ibus, zeitgeist, update-manager (no network access after all), twisted-core, plymouth logos. I'm thinking about creating a swap partition on HDD, can it be later added to expand this /cow ? Is there a package for the text-mode installation which is used on Alternate CDs? I don't want to re-create Edubuntu from an Alternate CD. This behavior is reproducible in VM limited to 256Mb RAM.

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• Would security be comprimised if I install a gui (e.g. zPanel) for LAMP?

  - by Kirk

  I am an Ubuntu/Linux noob. There are many questions I have regarding the use of my system as a server. First and foremost is security. I want to install a simple GUI (zPanel appears the most user friendly) that will allow others to log into the server and database with ease, similar to a hosting service, though my intent is for the development of one site. Upon looking at the instructions of numerous GUI's, they require installation as root. This makes me uneasy, as my thoughts spiral to the possibilities of the developers creating the elusive 'back-door', thereby giving them root access to my entire system. Am I just being paranoid or is that theoretically possible? If it is possible, what steps are necessary to ensure security?

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• Configure Unity Lenses and what they search

  - by Sindre

  I'm using Ubuntu 12.10. I've read about a lense (ppa:pydave/unity-lenses) that you can replace with the original files and folders lense, so you can search all your files. Instead of the current which only search used/recently used files and programs. I couldn't get this to work with 12.10, got a bunch of errors when I tried adding the ppa. I would like to set up a lens that can search all my files and folders (from all of my 3 hdd's), one that search through my videos (ability to specify which folders) and the same for music. So basically I would like to set up three specific lenses that each get a set of specified folders that they search through. If this is not possible, is there atleast a way to configure the current Files and Folders lense to ignore certain folders? I don't like when my dash shows files that I don't want to be shown. I should add that I'm completely new to Ubuntu and I apologize beforehand if this information could easily be found. But I wasn't able to find something like this. Edit: I found out how I can use the Privacy application to ignore what I want, so that's sorted now. Sorry for not researching it more. But my question regarding the lenses still stand. All help is greatly appreciated.

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• 404 Errors in ubuntu 13.10

  - by Levan

  Just installed ubuntu 13.10 I did apt-update in terminal and sow this Err http://ppa.launchpad.net /ubuntu/saucy amd64 Packages 404 Not Found Err http://ppa.launchpad.net /ubuntu/main amd64 Packages 404 Not Found Err http://ppa.launchpad.net /ubuntu/saucy i386 Packages 404 Not Found Err http://ppa.laun W: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/dists//ubuntu/saucy/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/dists//ubuntu/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/dists//ubuntu/saucy/binary-i386/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/dists//ubuntu/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. I do not understand why am I getting this errors wine's ppa shows that 13.10 is available and the above I even do not know what is it ?? any help how to fix this grep -rn "ubuntu-wine" /etc/apt/sources* /etc/apt/sources.list.d/ubuntu-wine-ppa_-saucy.list:1:deb http://ppa.launchpad.net/ubuntu-wine/ppa /ubuntu saucy main /etc/apt/sources.list.d/ubuntu-wine-ppa_-saucy.list:2:# deb-src http://ppa.launchpad.net/ubuntu-wine/ppa /ubuntu saucy main

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• Dual Boot menu with Ubuntu and Windows 8 not showing up

  - by user180630

  I know a lot of posts have been written, and I had read most of them when I encountered the problem. None of them solved the problem. I have successfully installed Ubuntu 12.04 on top of Windows 8. Now my PC simply boots into Windows 8. If I press 'Esc' at start of BIOS, and then F9,the GRUB shows up and Ubuntu is listed at the top of the several options to boot from. I did run Boot-Repair once I logged into Ubuntu explicitly from GRUB as mentioned above. I did all said by Stormvirux in this link but was still unsuccessful. The debug info is listed here. Something which confuses me is the message which Boot-Repair stated after it did its job. You can now reboot your computer. Please do not forget to make your BIOS boot on sda (8004MB) disk! The boot files of [The OS now in use - Ubuntu 12.04.2 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, 200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. (https://help.ubuntu.com/community/BootPartition) I don't know why it says it is far from the start of the disk as I see it first in the GRUB menu which comes up at startup. One more input, when I try to place the GRUB in sda, Boot-Repair does not progress giving me the following error: GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option. I had to select Separate /boot/efi partition: sdb2

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• Network connection fails when downloading data

  - by Guus

  In the past few weeks, I've noticed my network connection becoming unstable while downloading files. I'm not sure how to diagnose this issue. I've found that my network connections appear to be temporarily unresponsive (for periods up to a minute or so) while I'm downloading a file (that's large enough to not be downloaded instantly). The problem occurs when downloading data through a webbrowser, but also when using SCP to download data from a remote location. During the period in which network connections are unresponsive, every resource that I try to access over the network is unavailable. This includes: The download itself (SCP reports a 'stalled' download) Web pages (won't load - browsers report 'resource unavailable') SSH sessions (CLI freezes) VPN connections (connections terminate) IM client connections (client starts reconnection attempts) ... (everything is pretty much dead) I've noticed that during such a period, I cannot even access the (web-based) administrative console of the router on my LAN at home (although it remains reachable for other devices). The problem occurs when connected to my home network, but also when I'm in the office. Other devices than my laptop are not affected. Given the above two characteristics I assume the problem cause lies within my laptop, not the network infrastructure. I'm running Ubuntu 11.10. Apart from applying automatic updates from Ubuntu, I can't think of a change that I applied to the OS that could have started the problems. I'm absolutely positive that this issue did not occur up to a few weeks ago (as it's very noticeable, and only started to annoy me in the last few days). When the problem occurs, applications that make use of a network connection fail visibly (I get popups telling me that a VPN connection is broken, for instance). The network manager does not report any issues related to my wifi-connection though. Help?

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• Ubuntu 11.10 crashes all browsers often

  - by murat

  I have been using ubuntu 11.10 for 1 year,today it made me surprised. When I open google chrome it just closes itself. Firstly i thought that it is just for chrome and tried Firefox : It also closes itself and one thing more : I tried desktop programs such as image viewer it also closes itself.I restarted it but there is no changing.What can do this ? is it virus or another system problem ? I did not have any problem like this until today.. $ google-chrome (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (google-chrome:7064): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", --2012-04-04 19:33:14-- https://clients2.google.com/cr/report Resolving clients2.google.com... 173.194.70.100, 173.194.70.101, 173.194.70.102, ... Connecting to clients2.google.com|173.194.70.100|:443... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] 2012-04-04 19:33:19 (888 KB/s) - `/dev/fd/3' saved [16] (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7166): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", Moonlight: 3.99.0.3 Moonlight: Attempting to load libmoonloaderxpi (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (exe:7201): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory Segmentation fault After trying to install libvdpau1 error is changed : google-chrome --2012-04-04 20:05:03-- https://clients2.google.com/cr/report Resolving clients2.google.com... 173.194.70.113, 173.194.70.138, 173.194.70.139, ... Connecting to clients2.google.com|173.194.70.113|:443... connected. HTTP request sent, awaiting response... Moonlight: 3.99.0.3 Moonlight: Attempting to load libmoonloaderxpi 200 OK Length: unspecified [text/html] Saving to: `/dev/fd/3' [<=> ] 0 --.-K/s f4c55117d1b4656e [ <= ] 16 --.-K/s in 0s 2012-04-04 20:05:12 (337 KB/s) - `/dev/fd/3' saved [16] Segmentation fault

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• What's the equivalent of the "cls" command from Windows/DOS?

  - by blade19899

  I used to use cmd back in windows and the command line a used a lot was cls. It's kind of like the clear command in Linux but it cleans the screen permanently. If you use the clear command it just scroll down so that you don't see the command you where working on. I like both a lot but my question is how do i get a cls like command that clears the screen and can't browse up to see the command you where working on?

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• Deactivate volume amplification?

  - by Industrial

  Hi everyone, I would like to deactivate the amplification feature on my sound volume slider. Using any amplification makes the sound really bad with clipping sounds taking over. It's really annoying to have to worry about where the amplification starts/stops when adjusting the slider from my keyboard or through the Gnome panel (sound thingy). I have to open the "Sound preferences" after each time adjusting the volume and ensure that the level is set to 100% unamplified. So can I do this someway easy in Ubuntu 10.10?

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• Cannot play windows WMA lossless files on Rhythmbox

  - by sr71

  I have installed Ubuntu 10.10 with all its updates (without Windows) on it’s own drive and everything is working fine. I want to play WMA audio files, also mp3 files. The mp3 files play fine. The WMA files do not play. Used "Rhythmbox Music Player" with and without "Ubuntu-restricted" -extras. Still does not play the lossless windows audio files. I am frustrated with searching to play a WMA file ("download this converter"), but one cannot use this until one "deletes this". I have done everything but it still does not play my windows lossless files that I made from all my CD’s. I am looking for a music player that I can use to play mp3’s and WMA lossless music files and automatically put the album cover on and update the info if one exists. Installation should be as simple as possible. Right now I am back to the original virgin Ubuntu 10.10 with all the recent updates. This computer will do nothing but play music (mp3 and WMA) through a stereo system. I also use Internet to update album info for the music. I do not care what bells and whistles the music player program has, as long as it is an easy install and just plays my mp3 and wma lossless music files. Any help would be appreciated.

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• Can't boot Ubuntu 12.10 graphics problem

  - by Frantumn

  I can't boot since installing Ubuntu 12.10 When I try to run Ubuntu My computer never gets to the Ubuntu screen with the loading dots. I tried to run in recovery mode with safe graphics (failsafex) When I do this a message pops up saying "the system is running in low graphics mode", If I click okay I am asked what would I like to do and am given four options. I tried running low graphics for one session and then a message appears with a progress bar and says standby one minute while the display restarts. The progress bar never moves and if I click okay the whole process just restarts. I Don't know what to do from here I can't get into the OS. I'm not sure whether the problem is related to compatibility with my laptop monitor or my graphic card nvidia360m I had to install using a safe graphics mode. To learn about how I installed see this link. This link also has information on my computer hardware. Can't install Ubuntu since 10.10 ----UPDATE--- I was able to get into a desktop environment By installing Nvidia-current however it is messy. I have a screen and I am able to see my desktop however there is no unity bar and none of the keyboard controls work. I can right click and create a folder on the desktop and then I can see inside that folder in a traditional browser window. There is still no top menu or unity bar. When I boot normally I don't get into the desktop environment and I get this message in tty 'GPU lockup switching to software FBCON' Okay, I've played around with tips the pages from comments. I've been able to consistantly get into a safemode desktop environment using the xorg & nouveau drivers. I've tried switching between the 5 different options in the Additional Drivers tab in Software Sources. The nVidia (proprietary, tested) driver gets beyond the GPU lockup on a normal boot and actually gets into a Desktop. The issue is then that there is no Unity bar, or top screen menu bar and the resolution is very low. I've tried switching to the (prop, tested) driver and then reinstalling Unity and Ubuntu-Desktop but that didn't work either.

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• QML: Overriding a signal handler from other element

  - by user3490458

  Is it possible to override an elements action (eg onTriggered() of a Timer) from within the onClick() of a button? Something like so- Button { id: centerBtn objectName: "button" onClicked: { delaytimer.running = true; delayTimer.onTriggered {}; // override here } Timer { id: delaytimer interval: 1000 running: false repeat: false onTriggered: //something implemented here } }

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• Beginner help with compiling a driver into the kernel so my ethernet works

  - by MattC

  I have a Acer Aspire Revo nettop and it seems like it's a common error that Ubuntu doesn't have a driver for the ethernet. Someone recommend following the steps on this page. http://manpages.ubuntu.com/manpages/jaunty/man4/nfe.4freebsd.html The only problem is that I have no clue what to do really. I'm almost like an absolute beginner with linux and was hoping to play with it by doing some apache+php+mysql stuff, however I cannot at the moment. Where is the kernel configuration file? and where is the loader.conf file?

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