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• iptables allow dyndns domain name and auto update rules

  - by user3215

  I have registered with dyndns domain for my dynamically changing public ip address to use with iptable rules. On a server I've allowed some ports for this domain in the iptables configuration like the below entries: -A INPUT -s mycompany.dyndns.com -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -s mycompany.dyndns.com -p tcp -m tcp --dport 3306 -j ACCEPT -A INPUT -s mycompany.dyndns.com -p tcp -m tcp --dport 21 -j ACCEPT But when ever my modem restarts, I couldn't connect to these allowed ports as public ip changes with modem restart and are not updated in the iptables on the server. Is there any option to automatically update iptable rules on server.

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• wubi boots into grub after 12.04 install

  - by josh

  I would just like to recover the files off of the wubi install and then install a proper version of ubuntu, is there any way to recover the files? for further information. I had ubuntu 11.04 and used the update manager to update it to 12.04. it worked for aproximitely a day and then I had to do a hard reset the next day after what seemed to be artifact corruption. upon trying to reboot into ubuntu it brings up the grub command prompt "gnu grub version 1.99-12ubuntu5" i have previously done hard resets on it in the past, there is nothing in my windows hidden 000 recovery folder.

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• Preseed values for keyboard-configuration

  - by Nikolai

  I'd like to activate ctrl+alt+backspace on multiple pcs (Ubuntu 14.04) using dpkg-reconfigure keyboard-configuration I don't want to do the dialog every time so i tried: debconf-get-selections | grep "^keyboard-configuration" > config.dat on a host where i answered the dialog with the desired answers On the host where i want to do it non interactively i tried: debconf-set-selections config.dat dpkg-reconfigure -f noninteractive keyboard-configuration it ran without asking, but afterwards the selections where reset to the default values How can i get dpkg to use my predefined values? Or is there another possibility to enable the ctrl+alt+backspace for all users without going through dialogs?

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• NIS client authentication

  - by Tarun Gupta

  How to configure the nis client on ubuntu? and how to configure system authentication? there is no option for system authentication like system setting system info in my system etc. when ever i go to software center and search them nis authentication then i got one package for nis authentication and i try to install them then one error occur that is remove hostname utility. when i try to remove hostname utility then it does not remove.

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• 12.04/ RecordMyDesktop the sound isnt working...... Why?

  - by Alex

  im unable to record sound using this app. the check box is checked for the sound, it just doesnt record sound. idk what to do. i have ubuntu 12.04 64bit. plus nvidia drivers dont work what so ever. so im just using the default ubuntu drivers. i looked up the site for this app. they dont give an instructions on sound for this program. any help me please??? the microphone sound input works with it. but it cant record system sounds.

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• how to fix error when authenticating in U1

  - by Yann

  Like other users, when authenticating in U1 I get this error: Method "CreateItem" with signature "a{sv}(oayay)b" on interface "org.freedesktop.Secret.Collection" doesn't exist. And in /var/log/auth.log: gnome-keyring-daemon[4793]: egg_symkey_generate_simple: assertion `iterations >= 1' failed gnome-keyring-daemon[4793]: couldn't prepare to write out keyring: /home/yann/.gnome2/keyrings/login_1.keyring So I tried to move "login.keyring". I typed no password for the security when logging into U1, accepted non secured way to save passwords. And a message told me the operation successfully completed (in French). But, sync did not work. And u1sdtool --status returned this: State: AUTH_FAILED connection: With User With Network description: auth failed is_connected: False is_error: True is_online: False queues: WORKING I'm sorry U1 doesn't work anymore; it was really useful to me. Can you help me ? Ubuntu 11.10

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• Dual nVidia GPUs (3 monitors) not working in 11.10

  - by jasonmclose

  after searching I have not found a solution. I have 2 nvidia quadro 295 cards with 3 monitors but I can not extend twinview across multiple GPUs. I have the most recent nvidia proprietary drivers installed, and they work fine for the single GPU / dual monitors. I tried using xinerama, but without success. I don't mind switching to the nouveau drivers if that would handle my multiple monitors, although I would like to continue to use unity and compiz if i can).

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• Incorrect monitor colours

  - by PedroGabriel

  I'm using Ubuntu 11.10 and my monitor had a problem where Green is the bright colour, there's no way to change it in the monitor settings, so when I was using WinXP (I'm new in here) I changed the green to lower using Video Driver settings, in here (ubuntu) I don't know exactly how I would change the green colour to low, so my "black" would be seem has a real black, no green. Thanks for reading. Sorry for bad English.

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• Wireless connect- Webcam activation- MBR repair/rebuild

  - by Rick

  Evening: I've NEVER had so much difficulty with Ubuntu. I got "Ubuntu Made Easy" and couldn't believe it hasn't done a damn thing to help solve the problems!!! #1. Since install of 12.04 I haven't been able to connect to wireless. Have done everything I can find/think of. Laptop indicates it's receiving wireless. Ran all updates, restricted extras, etc. NOTHING!! Tried to find how to activate built-in webcam (it worked when I installed O.S.) NOTHING; tried to find MBR repair/rebuild terminal command.. NOTHING!!! The book has has been useless, so far!! I really have to solve these problems, otherwise laptop and UBUNTU are worthless!!! Hope someone can help me out with any or all the problems I've listed. Sure would appreciate it!!!!!!!!!!! (laptop HP 2000-210US) Thanks: Rick

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• How do I revert Alt-tab behavior to switch between windows on the current workspace?

  - by chris.ritsen

  Enabling Bias alt-tab sorting to prefer windows on the current viewport as described here made no difference. How can I get back the exact same behavior as 11.04, so that alt-tab only switches between windows on the current workspace? Simply disabling the alt-tab and shift-alt-tab keybindings on the unity switcher seems to have helped, but it still switches workspaces on me sometimes. For example, if I give a terminal window focus then press alt-tab, it switches to another terminal window on any workspace before trying to switch on the same workspace. Also, the Unity switcher still shows up when I alt-tab then hold alt even though I removed its alt-tab keybinding.

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• Screen Scaling Problem

  - by Glenbot3000

  I think this is what it's called but I'm not quite sure tbf, aha. Yeah, so I updated packages last night like I do every night, and when I booted my computer this morning I had a problem whereby the display ran over the edge of the screen. This has been a problem for a while, but I rectified it by changing a setting on the nVidia program, however I think it has been updated to remove said feature as I can't find it anymore. I have no settings on my screen to adjust this either, so I'm sorta stuck without the ~20px around the contour of my screen. It is a problem at all available resolutions. Here's a lil' pic of my problem: https://docs.google.com/file/d/0ByPHeBI8W35GcmZYOThWZ0hGd0k/edit Edit: Probably also worth mentioning the screen was originally detected as "Laptop" in the Display setting and had many resolutions to choose from, however now it's displayed as "OEM" and only has three.

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• 12.04 server on home network

  - by dustin mantei

  I need advice to help me with a server install, I'm new to ubuntu and linux in general. I have 6 systems in my house, 5 being windows 7 and this laptop that I am typing on is Linux mint 13 Maya. Question is, my wife will not transition to anything. She is stuck in Gates-land. so, can I make a server with ubuntu 12.04 (burnt disc image last night) so that all systems in my home can access and my mother-in-law in another state can also access with a username? That would be awesome and it may convince the war dept (my wife) to change all the systems in my house to ubuntu/linux. Sorry this is so long winded, but all the questions I have seen on this forum don't answer it completely.

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• Ubuntu 13.04 freezes after boot or suspend (every other time)

  - by Max

  I'm running 13.04 on Asus UL30A Process: Genuine Intel® CPU U7300 @ 1.30GHz × 2 Graphics: Mobile Intel® GM45 Express Chipset OS type: 64-bit Everything completely freezes after every other a boot or suspend. No keyboard or mouse. It happens every other time. It freezes, I reboot and it works work. Next time I will reboot, it will freeze again. This never happened with 12.10. Any advice on how to fix this?

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• New windows from the dock in Gnome Shell

  - by Andrea

  I am using Gnome Shell on Ubuntu 11.10, and I frequently use workspaces, as the shell encourages to do. My only complaint is that it is slow to place different windows of the same program in different workspaces. What I would like to do: click on an empty workspace, click on the Nautilus icon in the dock and browse to the correct folder. Then click on another empty workspace, click on the Nautilus icon and so on. This does not work: the second time I open Nautilus, the dock lets me switch to the previous instance, which is almost never what I want. So I have to click on the Nautilus icon, open a new window, place it on a different desktop, switch to that folder and finally browse to the correct folder. Is there a way to simplify this flow? It would be even better if I was able to link a specific folder from the dock, or better yet to have something similar to a Unity lens, where I can choose between the most used folders.

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• Dolphin Search Toolbar is missing its text field. How can I get it back?

  - by Ike

  A while ago, my Search Toolbar bar went missing in dolphin. I'm referring to the Search Toolbar found under SettingsToolbars ShownSearch Toolbar. I used to sit at the very top right corner of the window. If the search toolbar is checked for view/unhide, the toolbar looks to activate something, as there is a slight shift in the interface buttons, but the text field is gone from the toolbar. I tried reconfiguring with dpkg, purging and reinstalling, etc. I left it alone as I thought it would be fixed in an update, but today I upgraded dolphin and it's still gone. This appears to be a 4.6 bug or something. Any thoughts?

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• Network print to brother MFC-7420

  - by trampster

  I am trying to pint to a Brother MFC-7420 from my ubuntu 10.04 machine. The brother is attached to a windows XP machine and is shared. This is what I have tried: System-Administration-Printing, Add, Expand Network Printer, Windows Printer via SAMBA, Browse (I can find the printer no problems here), Foward, Choose Driver Dialog, Brother, My printer is not in this list So the next thing I tried was to download the printer driver from here http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html The driver installed fine but my printer still does not appear in the list. I also tried installing the cups wrapper but that gave the following error. Restarting Common Unix Printing System: cupsd [ OK ] cp: cannot stat `/usr/share/cups/model/MFC7420.ppd': No such file or directory dpkg: error processing cupswrappermfc7420 (--install): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: cupswrappermfc7420 I tried connecting the printer directly but even though I have installed the driver, when I go to printers and click on the printer (it shows up fine as a USB printer) then it say searching for drivers and then gives me a list, this is the same list as before which doesn't have my printer. It really shouldn't be this hard. on window you don't have to installing anything it just works and the same is true for my brothers Mac. How do I print to my printer?

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• Wired connection to windows ISC stopped working

  - by cmpickle

  I have had my Linux box connected to the internet through a Windows computer by wiring them together with a cat5 cable then the Windows is connected wireless to a router. This setup has worked since I got the Linux box but just yesterday stopped working. The changes that occurred were: I changed networking so that I was connecting the Linux box and Windows computer through a second router so during that time the Linux box went through a router to connect to the Windows computer that was still connected wireless to the first router. The Internet didn't work on the Linux box at the time they second router was involved when I removed it and directly connected the Linux box and Windows the Internet worked again. Another thing that changed was that I had disconnected my Windows computer from all network connections and deleted them to make my Ethernet work better. Also at that time my dad had I connect the Windows to a third router and changed some settings in it. After reconnecting this time the connection between the router and the windows would not establish. If anyone has any ideas as to why this is I would greatly appreciate it!

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• Ubuntu Wubi Booting Problem

  - by D3s7

  i have a problem with my Ubuntu 12.04 Wubi installation, sometimes when booting, the computer will get to the purple screen without the Ubuntu logo, then will go to a black screen and then lots of white saccaged colors will appear and i will be taken to the login page. But sometimes, it just get stuck on the black screen and does nothing and i have to hard shutdown and retry it until it works. What may cause this problem and why? I can shutdown correctly. Thanks for helping. Edit: RADEON HD 7650M Graphic card with latest available Drivers on amd's driver download site (fglrx drivers caused shutdown problems so i removed them). Screen resolution is 1600x900.

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• How to get differents backgrounds for each desktop working properly?

  - by MaikoID

  I've followed all the instructions for getting differents wallpapers for each desktop. I'm using Ubuntu 10.10. I've installed compiz-fusion-plugins-extra to add Wallpaper plugin on my Compiz Settings Manager (ccsm). But unfortunaly I cannot get my wallpapers working properly. I follow these instructions http://ubuntuguide.net/different-wallpapers-on-each-workspace-in-ubuntu and I just get a black background. Everything works fine after I press Win+P (I don't know what is this shortcut, refresh output I guess) or switch between ttf1 and ttf8 (ctrl+alt+f1 and ctrl+alt+f8). I tried reboot but the problem persist. What can I do to resolve this issue ?

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• All files gone after running fsck. How can I recover my files?

  - by cinlung

  I am a newbie in Linux. So this is my story I installed Ubuntu server 10.04lts. It worked great for many months, until today i decided to run fsck on the system partition and although it warned me, I kept pressing yes and now it will only boot into grub prompt. So i read some article and tried grub reinstall. But before performing grub reinstall, i decided to run fsck again from Ubuntu 10.04 lts for desktop live CD. The fsck painfully passes, now my drive is recognized as ext4 system and I am able to mount it again. However, all i can see is just boot directory and lost&found. I tried to perform grub reinstalling by doing grup-install stuff, now my grub is still not loading right, my files are missing, and the weird thing is that the amount I found used by boot and lost n found is only 5gb and the amount used in he hdd is 8 gb. So my files must be somewhere in the hdd. Is there any sinple way maybe a windows tool or something yo recover my files? I only need to retrieve my database backup and everything else can go. I am freaking out here. Please help.

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• Problems about responsiveness and keyboard/mousepad not working

  - by ChrisTheNoob

  So I installed Ubuntu 12.04, I'm very new at this and want to get into the world of Linux but have run into nothing but problems. I have an Acer Aspire 5553g. First off, my keyboard won't work. Second, my computer has more than enough of everything to run Ubuntu smoothly, but everything runs extremely slow. (You move the mouse and it gets there a few seconds later) It's to the point where I can't even use it and I really want to. I'm tired of Microsoft stuff and I've been looking at learning how to use Linux based operating systems for a while. Please send me some help to fix these issues and maybe some tips to help get me started. Thanks in advance chris

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• Why do I get disk I/O errors booting the 3.2 kernel on a xen vps server?

  - by Doug

  I have a xen vps, which I just upgraded to the new LTS 12 Precise Pangolin. However, I see this error on booting: [ 12.848076] end_request: I/O error, dev xvda, sector 12841 [ 12.848093] end_request: I/O error, dev xvda, sector 12841 [ 12.848103] Buffer I/O error on device xvda1, logical block 1605 [ 12.848110] lost page write due to I/O error on xvda1 [ 12.848129] Aborting journal on device xvda1. Results in / being mounted read-only. Reboot: [ 3.087257] EXT3-fs (xvda1): warning: ext3_clear_journal_err: Marking fs in need of filesystem check. [ 3.087677] EXT3-fs (xvda1): recovery complete [ 3.088514] EXT3-fs (xvda1): mounted filesystem with ordered data mode Begin: Running /scripts/local-bottom ... done. done. Begin: Running /scripts/init-bottom ... done. fsck from util-linux 2.20.1 PRGMRDISK1 contains a file system with errors, check forced. Checking disk drives for errors. This may take several minutes. Press C to cancel all checks in progress PRGMRDISK1: ***** REBOOT LINUX ***** PRGMRDISK1: 371152/6001184 files (2.8% non-contiguous), 4727949/12000000 blocks mountall: fsck / [308] terminated with status 3 mountall: System must be rebooted: / [ 151.566949] Restarting system. Name ID Mem VCPUs State Time(s) shadowmint 236 2048 1 --p--- 0.0 Reboot - back to 1. This is definitely an issue with the 3.2 kernel, because booting the 3.0.0 or 2.6.38 kernel series make this issue magically disappear. I'm certain this is some kind of weird xen thing, but no idea. Anyone? Anyhow, until this is resolve I strongly recommend against upgrading if you're running a xen server.

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• Empty nvidia-settings after install v. 331.67 driver on Ubuntu 14.04?

  - by Victoralm

  I've followed this tutorial (with the following adjustments below) to install v. 331.67 nVidia driver. But get nvidia-settings (NVIDIA X Server Settings) empty... Then, before restart the PC, I make a xorg.conf in the nvidia-settings. The driver make Unity don't start right. So I installed nvidia-331-updates via apt-get and restarted the PC again. After that, the Unity works fine. But the nvidia-settings gets almost empty... Can someone help !?

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• How to change the default desktop environment?

  - by Kshitiz Sharma

  I wanted to try out different desktop environments so I installed XFCE, KDE, GNOME, etc on top of Unity in Ubuntu 12.04 After a while I decided that I didn't like those other DEs and would stick to Unity. So I changed my default DE to Unity by configuring gdm. > sudo dpkg-reconfigure gdm Now I am able to choose my DE at login time and all of DEs are working properly. But the strange thing is that my boot up screen says 'lubuntu', my login screen is KDE, and my desktop is Unity. How and why is this happening? Why didn't my gdm configuration have any effect? Does login and boot up screen need to be configured separately from the DE? There are other similar questions here but they are not the same as this one. I do not want to remove the other enviroments I'm quite happy with having a list of DEs to select from. I want to know how to set proper defaults.

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• How to install Opera Browser?

  - by bruce

  I am trying to install opera browser from the terminal. I downloaded the 'debian' installer because it didn't show up in software center. It completely destroyed my software center - it is frozen and I have no idea how to fix (I have a different thread for that though). Can I use this thing called synaptic package manager to install Opera? or am I stuck with Firefox? How do I install Opera Browser?

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