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• Changing Java from OpenJDK to SunJava

  - by SpiXel

  I want to change OpenJDK to SunJava in my ubuntu linux desktop , i have downloaded the "jdk-7.tar.gz" from sun's website, but there problem is how to make the system to use the newly downloaded java ? I tried adding the new jdk/bin/java to my PATH ( from .bashrc ) but that seem not to work (cause probably OpenJDK's path is inside my PATH variable as well , so the system checks that first) Here's my JDK7 : /usr/lib/jdk7/bin/java Here's what $(which java) outputs : /usr/bin/java Thanks in advance

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• What is the difference between the Client and GTK versions of emacs?

  - by David

  My Ubuntu 10.04 desktop has three versions of emacs: emacs-snapshot (client) emacs-snapshot (GTK) GNU Emacs 23 I mostly use emacs-snapshot, but I also use regular emacs in terminal mode emacs -nw. However, it is not clear to me what the difference is between the client and GTK versions of emacs-snapshot is, which one is launched by emacs-snapshot at the terminal, and if I should uninstall one or just ignore it.

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• How can I find out what DPI that my laptop supports?

  - by michael

  I have a new HP dv7t laptop. Can I find out what DPI this laptop supports so that I can set my Ubuntu settings? I think I got the resolution working right after I installed the proprietary driver for the Nvdia graphics card. Thank you.

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• power management of USB-enclosed hard drives

  - by intuited

  With a typical USB hard drive enclosure, is the full range of drive power management functionality available? In what may be an unrelated matter: is it possible to suspend a PC without unmounting an attached USB-powered drive, and then remounting it on resume? This is the behaviour I'm currently seeing (running Ubuntu linux 10.10). Are there certain models or brands that provide more complete control over this aspect of drive operation? My Friendly Neighbourhood Computer Store carries (part of) the Vantec Nexstar product line.

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• Is it possible to run a personalized command when Evolution receives new mail?

  - by Igoru

  I'm using Evolution for reading my emails at my Ubuntu 9.10. I would like to run a personalized command when it receives a mail, like checkgmail. Example: blink --scrolllockled --rate {number-of-new-mail} Is it possible?

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• After exiting, the home folder cannot be visited?

  - by Keating Wang

  I ssh to a ubuntu sever, start a web project(Rails), then I can visit this project. I close the the ssh terminal, then the project says can not find files(view pages,css files and so on). I put the project in the home folder(/home/byht). why? When closing the ssh terminal, the user's folder can not be visited ? You know, when I put the project in another folder(/usr/local), everything goes well.

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• Start Anew with my USB stick

  - by Asaf

  This story starts with me taking my USB stick to work and unplugging it by accident in the middle of a file transfer. The USB stopped working completely, now I have Linux Ubuntu on my Laptop at home So I tried messing around with Gparted and Fdisk and all it did Was making my USB stick be partition less and 8 MB instead of 2GB So instead of creating more havoc, I ask kindly for help. I tried going to fdisk /dev/sdb and inside there were no partitions, added a new one but that didn't really do anything, /dev/sdb1 was none-existent..

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• linux proxy server for webbrowser?

  - by Mike L

  Using ubuntu, How can i make it so that i can use my servers IPs to make a proxy for a user with login and password, Thanks!

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• Removed Empathy icon from panel, how do I add it back?

  - by riteshmnayak

  I installed Ubuntu 10.04 and got Empathy IM client configured. The icon on the panel next to the clock, n/w was not functioning as expected, so I accidentally removed it from the panel. Now I am unable to see the icon to show my contacts online. How do I add it back to the panel?

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• soft lockup - CPU#0 stuck for 11s! error with Xen virtual machines

  - by Arun

  Getting a kernel panic with this error on my XEN VPS's. (all on 8.04 LTS) The kernel version on my Dom-0 is 2.6.24-25-xen and the kernel version on the Xen VPS is also 2.6.24-25-xen. I read something about disabling APIC from here http://muffinresearch.co.uk/archives/2008/08/20/ubuntu-bug-soft-lockup-cpu0-stuck-for-11s/ but that doesn't seem to help as well. Anyone experienced this and are there any workarounds? Thanks in advance!

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• How do you get an add-on to run in Firefox 4?

  - by efficiencyIsBliss

  I have an add-on called Flash-Aid in Firefox 4 on my Ubuntu build, but ever since Mozilla came up with their new UI, I haven't been able to figure out how to get add-ons to actually run within Firefox. Double clicking them just opens up a detail page about them and there are no options to run them. With most add-ons, this isn't a problem since they usually don't need to be explicitly run, but this one does. Can someone tell me how to do this?

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• How to allow only specific directories to use htaccess?

  - by DisgruntledGoat

  Currently in apache2.conf I have AllowOverride all set for /var/www which simply allows htaccess for all the sites on the server (which is Ubuntu, 9.04). However, I'd rather only allow overrides in each site root directory and nothing else. In other words, /var/www/site1, /var/www/site2, etc. can have a htaccess, but all other directories including /var/www and /var/www/site1/content cannot. Is there a way to do this without having to write a rule for every site on the server?

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• How to check if power cable is connected from the command line?

  - by D Connors

  Hi, I'm running ubuntu on my notebook and I need a way to check (from the command line) if the power cable is connected. Is there any system file that keeps log of this? or is there a bash command that will help me? I need this for a script that will behave differently depending on whether the power cord is plugged in or not.

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• Is it possible to continue a RAID 5 resync if it was interrupted?

  - by rubo77

  If you replaced a broken Harddisk in a RAID 5 the raid must be resynced, which can last lots of hours, if it has some TeraBytes. If this resync is interrupted by powerloss, can the server be rebooted and the resync be started over again? (I am using Ubuntu 12.04 on my server in my livingroom and it shut down into hibernate mode, cause I accidently hit the powerbutton while the resync was still running)

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• Why my samba printer is not visible (after boot) until i restart smb ?

  - by j23tom

  I've an old hp1100 and ubuntu 9.10 and now upgraded to lucid prerelease. I can't see my printer on network (using smb://mycomputer on nautilus or \mycomputr from xp). As long as i will not restart smbd (on lucid: sudo restart smbd) my printer is not visible as network share. All file shares are always visible. My printer is visible and working after smbd restart Any clue what might cause this ?

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• Thin configuration doesn't start on boot, but they do on manual start [migrated]

  - by zad0xsis

  I have some thin config files (generated with sudo thin install) which are slightly modified (only paths where they're located). I can start them just fine with /etc/init.d/thin start, but if the server is restarted, they're not auto started. I issued the update-rc.d thin defaults command to make it run on startup, but no luck yet. This server is running Ubuntu 12.04.1 32-bit, Ruby 1.9.3p194, MongoDB 2.2.0.

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• Wireless USB Print Server for use with both Linux and Windows

  - by John

  I am looking for a wireless usb print server that will work with my netbook running ubuntu and my main pc running windows. There seems to be little information on anything that works with both reliability. Dose anyone know of anything that will work? thanks

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• How to connect to MySQL server in LAN

  - by waelbk

  Ok, Here is the technical description. My laptop's config: Ip Adress:192.168.2.5 Mysqlserver 5.0 on port : 3306 Operating system: Ubuntu the database is in this machine My friend's laptop config: Ip Adress:192.168.2.4 Mysqlserver 5.0 on port : 3306 Operating system: Windows XP Both are on a wireless LAN connected through a belkin router (192.168.2.1) I put this but its not working: url = "jdbc:mysql://192.168.2.5:3306/Database" so how configure to connect to this database?

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• How to remove unwanted entries in the grub boot loader

  - by Nrew

  How to remove unwanted entries in the grub boot loader? There is still an entry for vista even if its not existing anymore. And the Memtest entry its also not needed. How do I remove those from ubuntu 10.04

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• Benchmark virtual machines?

  - by evan

  I'm looking for a good way to benchmark the performance of Ubuntu machines (preferably from the command line - only care about harddrive speed, memory, and cpu - not graphics). Are there any programs that could also be used on Mac or Windows so I could compare the results against an Apple or PC Desktop? Ultimately I'd like to use these benchmarks to compare different virtual machine configurations (speeds on different hosts and different hardware to get practical idea of the differences between different setups a rigs). Thanks!

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• Samsung series 7 Chronos. Linux compability

  - by foxy

  this might be strange for some people to hear, but I want to buy Samsung Chronos notebook and install Ubuntu alongside with Windows. And I want to know if there could be any trouble with hardware? I mean if all the ports should work fine, keyboard special buttons, lights on keyboard, this fast boot technology (wake from hibernation in few seconds), etc. Thank you for attention and forgive me if this question sounds weird for some of you.

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• Why can I no longer pin tabs in Google Chrome?

  - by Niphoet

  I am using the latest dev channel version of Chrome in Ubuntu 9.10. Before Chrome automatically updated a few days ago, I had the option to pin tabs. This option no longer appears when I right-click on a tab. Is anyone else having these problems? If not, any idea what I can do to fix this? Thanks.

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• System completely freezing

  - by Brett

  Just started using ubuntu on a machine and I'm also using a new video card. The system has freezed up a couple of times in the last hour. The display remains static, and the mouse cursor does will not move. Any ideas what could cause this?

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• Apache will not start with mod_wsgi enabled

  - by Rox45

  I'm trying to run Apache with mod_wsgi to run Python scripts. The server is running Ubuntu 12.04 with Zend Server installed, but when I enable the wsgi module Apache will not start. I get an error message of "apache2: apr_sockaddr_info_get() failed" in the error log. I installed the module using the Debian package. I can't seem to find this specific problem anywhere so maybe it's a problem with Zend Server? I'm stumped. Thanks

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• How do I upgrade VIM to 7.2 when 7.1 is the only version listed in my aptitude?

  - by rspeicher

  I have two Ubuntu servers on which I'm trying to upgrade VIM to 7.2, but apt-get install vim only lists version 7.1 which is already installed. Same with a search in aptitude. I've made sure my sources are updated, but it looks like they're pulling from either 'intrepid' or 'hardy', which I assume is part of the problem. How should I go about installing 7.2?

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