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• VirtualBox to use dual monitors

  - by fnord_ix

  I am am running Kubuntu Hardy Heron, with a dual monitor setup, and have VirtualBox on it running Windows XP in seamless mode. My problem is, I can't get virtualbox to extend to the second monitor. Has anyone been able to achieve this or know if it can be achieved?

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• Meet the New Apps Getting Ready for Ubuntu Lucid 10.04

  <b>Tech Drive-in:</b> "But apart from these eye candy, in a more subtle way, a number of new applications are also in the pipeline. Let's explore these new comers."

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• Why am I missing the Ubuntu icon on the log-in screen?

  - by dtdlurch

  I am running Ubuntu 12.10. On the log-in screen, there is no Ubuntu icon for me to click on to change desktop environments. I know where it should be, but it is simply not there. Why is this? And how can I get it back??? I just installed Cinnamon and I would very much like to switch to this environment. I apologize if this is has been addressed elsewhere, but I honestly did try to research before asking. I found several similar questions, but nothing that has answers that helped my situation. And an hour of Googling did not produce anything helpful at all. Thank you for your help.

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• How to get Postfix to send/forward/relay to a sub-domain located on another server?

  - by thiesdiggity

  I have a quick question. How do I setup postfix to send an email to another server (Exchange Server) when sending to an email address that has a sub-domain of our main server. For example, say our main server is mail.example.com and we have a Exchange server setup to receive emails from exchange.example.com. We have the MX records setup in our DNS and it receives correctly if we send from a GMail account. However, when we try to send an email from a @example.com account we get the following error: Host or domain name not found. Name service error for name=exchange.example.com type=A: Host not found I believe Postfix checks for local mailboxes first and if its setup with the domain it delivers to the local account, but in this case the sub-domain accounts are located in another server. Anyone have any thoughts on what I need to do within Postfix so it doesn't look locally for the exchange.example.com mailboxes? I found relay_domains directive within Postfix but that doesn't seem to fix it when I add the sub-domain. Thanks for your help.

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• How can I view my video card's temperature via SSH?

  - by NT3RP

  I've finally managed to set up my two ATI Radeon 6950 video cards in my machine, but the cards can get quite hot. Based on the arrangement of my apartment, I want to be able to SSH into the machine an execute a command to find out the temperature. What I have tried so far is this... export DISPLAY=:0.0 sudo aticonfig --adapter=0 --od-gettemperature However, when I do that via SSH, I get the following error: ERROR - X needs to be running to perform ATI Overdrive(TM) commands If I turn on X forwarding when I remote into the machine, then it just seems to affect my local machine instead of the remote machine. Am I doing this correctly? Is there a better way to monitor my video card's temperature?

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• Postifix SMTP Load Balance

  - by user103373

  I want to load balance outbound emails between 3 post-fix gateways for sending mails only reason is to use multiple different source IPs to increase throughput & inbox delivery. Each gateway should receive an approximately equal amount of outbound messages. How is it possible please suggest. +---------- smtp A --------- Internet | clients -------- smtp lb ----- smtp B --------- Internet | +---------- smtp C --------- Internet

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• Untar with date filter

  - by Don

  Is there any way to untar and only extract those files that are above a certain date including directory structure?? I restored a backup on a play server but it was a few days old. However I have a tar archive of the entire structure that is more up to date and healthy so now I want to extract all files (including directory structure) based on a date filter on the files if possible?

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• Cannot access the EC2 server - permissions problems, ssh is dead

  - by user1494072

  One of our developers worked on a beta server and accidentally changed the permissions of the whole system (chmod /) to root. Due to that, services are unable to access files, and we can't ssh to the machine (permission denied on the key) (UPDATE: ssh is dead after reboot, probably can't start). Does Amazon has an option to browse files / physically access the machine? Any other creative solution?

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• SSL on app - nginx web server

  - by Adam

  I am running an nginx web server where I redirect all http requests to https (with a self signed cert). Here is how I REDIRECT all http requests to https in the nginx config file: server { listen 80 default_server; listen [::]:80 default_server ipv6only=on; server_name my.server.ip; return 301 https://$server_name$request_uri; Problem is - I cannot seem to do so for an app running on a port. Example: http://my.server.ip:1234 does not redirect to https://my.server.ip:1234 ir works fine on all other urls like http://my.server.ip/temp etc. How can I modify the nginx config file to force that app url through ssl?

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• How to change the download save directory in ktorrent from a remote host

  - by Garethj94

  So I have ktorrent running on a server and I don't have the ability to see the X11 display for the client, and I need to change my download directory since I like to keep everything very organized. So I need a way to change the download directory for the program as a whole, not like decide where to put each and every torrent that I download. This can't be done through the webui preferences so I'm guessing that I'll have to do it through ssh somehow but from what I've read there really isn't a command to use. Also the way that I have the application run is on startup my server runs the command ktorrent, so it will already be running when I want to change the download location so I assume that I will have to restart the program as well. If anyone knows how to do this it would be much appreciated, and I can't think that I'm the only person to want this feature.

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• Allow SFTP in iptables

  - by Kevin Orriss

  I have just purchased a VPS from linode and am going through the setup guide. I have everything running (apache2, php, mysql etc) but I am being denied access via SFTP when using fileZilla to upload a file. Now this is my second time installing the server as I missed a section out the first time. I was able to connect to my server through SFTP on filezilla the first time and the thing I missed out was adding a new user and editing the iptables in the firewall. So it would seem that the guide I have been following has blocked SFTP but allowed SSH. Here is the iptables file: *filter # Allow all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT ! -i lo -d 127.0.0.0/8 -j REJECT # Accept all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow all outbound traffic - you can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allow HTTP and HTTPS connections from anywhere (the normal ports for websites and SSL). -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allow SSH connections # # The -dport number should be the same port number you set in sshd_config # -A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # Log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT All I would like is a line I need to put in there which allows SFTP over port 22. Thank you for reading this.

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• Ubuntu: Make ALSA default instead of PulseAudio

  <b>How To:</b> "This howto shows you, how to remove PulseAudio, add alsa-mixer applet to the panel and associate hotkeys for volume change."

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• PATH variable recently changed

  - by Dan

  $ loopy Command 'loopy' is available in '/usr/games/loopy' The command could not be located because '/usr/games' is not included in the PATH environment variable. loopy: command not found Every answer I've found just says to add it to my .profile... but this should be be in the PATH for all users, and was up until recently (I have no idea what would have caused it to change). How can I solve this on my system for all users? What could have caused this to change? Thanks.

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• apt-get install not working in script

  - by isoman

  I create a small script that installs a set of linux paquets . Strangely apt-get install always fails and tells me that the package have not been found. Here is my script: #! /bin/bash sudo apt-get install python-software-properties sudo apt-get update sudo add-apt-repository ppa:pitti/postgresql sudo apt-get install xfce4 postgresql-9.0 pgadmin3 chromium-browser wine iftop What can i do to fix this ? Thanks .

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• How to set the laptop screen brightness programatically?

  - by zls

  I'm currently migrating to openbox without gnome session. In unity i can use the vendor keys to set the screen brightness, but in openbox I'm on my own. /sys/class/backlight/acpi_video0/brightness works fine, the problem is that I need sudo to set the brightness and that wouldn't work with keyboard mappings. xbacklight -get/set doesn't do or output anything. I don't really want to use xrandr --brightness. Are there any other options or a way to fix the problems with xbacklight or acpi_video0 ?

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• PLS HELP!!How to boot windows 7 after installing ubuntu 12.10?

  - by user113553

  Im new to linux and im interested in learning it so I installed ubuntu 12.10 yesterday. Installation went smoothly and i chose "install alongside windows option" and I set about 50 gb using that slider and i tot i used 50 gb from c: drive but to my shock it used 50 gb space from f: drive. This was my first shock.Then when i restarted n tried to log into windows, nothing happened a black screen appeared saying "To restart press alt+ctrl+delete" but even pressing that it wont restart. No matter how many times i try rebooting windows is not booting same black screen saying restart appears. But i can log in to ubuntu and i can see that windows c: drive is fine. PLEASE HELP ME!!!!

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• running autobench (httperf)

  - by Matthew

  So I ran apt-get install httperf on my system and I can now run httperf. But how can I run 'autobench'? I downloaded the file and unarchived it and if I go in it and run autobench it says -bash command not found I think it's a perl script but if I run perl autobench, it says: root@example:/tmp/autobench-2.1.2# perl autobench Autobench configuration file not found - installing new copy in /root/.autobench.conf cp: cannot stat `/etc/autobench.conf': No such file or directory Installation complete - please rerun autobench Even if I run it again it says the same thing.

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• How to mount a drive with read only permission

  - by Master

  I am using this is fstab to mount the partition at backup. /dev/sda5 /media/virtual ntfs defaults 0 0 When i reboot the permissions are automatically set to 777. I want that only one user i.e userA can read and write , all others should not see the contents of that drive. What should i do anything like /dev/sda5 /media/virtual ntfs userA 700 defaults 0 0

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• DNS: Zone Files on Ubuntu 10.04

  <b>Begin Linux:</b> "There are several categories of zones that must be configured. You need to have forward lookup zones, which allow the nameserver to match names to IP Addresses. You&#8217;ll define these zones in the /etc/bind directory, in files with the &#8220;db&#8221; prefix."

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• Ubuntu: Consumer ready, Enterprise grade.

  <b>fewt@blog:~$ _:</b> "What's the best new feature coming to Lucid? You could even call this one Lucid's killer feature."

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• How to deal with LVM encryption on remote restart?

  - by hydroparadise

  Is there a way to handle the LVM mounting password remotely? This is usually presented during boot on the main console (where the machine physically resides at). I am able to ssh in during the prompt, but other services (like http, ftp, etc) will not run until the password is succesfully entered in at boot. However, ssh does not show the same password prompt that master console shows. How do I enter the LVM password remotely on boot?

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• How does Ubuntu achieve RGB subpixel rendering for Mono applications?

  - by user100751

  Distributions in the *Ubuntu ecosystem support proper RGB subpixel rendering in Mono based applications (e.g. Banshee) by default, i.e. out of the box without any additional configuration requirements, whereas e.g. Fedora does not. I am aware of general patent infringement issues and the freetype-freeworld libs, but never managed to enable RGB subpixel rendering for Mono in Fedora - it keeps using greyscale. So, as the question title implies: how does *Ubuntu achieve RGB subpixel rendering in Mono applications?

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• Graceful logout in dwm

  - by Riateche

  I want dwm to close all windows gracefully when I press quit hotkey. I like Unity behaviour: it displays list of windows denying logout (for example, editors with unsaved changes) and do not logout before all issues are resolved and applications are closed. By default, dwm just end X session and all running applications are killed. I was thinking about writing a script that will retrieve list of all windows, gracefully close them and wait for their processes to finish. But I even don't know how to close windows. The only way I know is using wmctrl, and this utility doesn't work with dwm.

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• Running 'dd' command at startup?

  - by Usman Ajmal

  Hi, I have set a script to run at Linux startup. The script contains a following line of code dd if=/dev/sda2 of=/dev/sda5 ?> result.txt Now, when my Linux Desktop appear, result.txt contain dd: opening '/dev/sda2': Permission denied If I prefix the dd command with sudo as: sudo dd if=/dev/sda2 of=/dev/sda5 ?> result.txt the result.txt contains sudo: no tty present and no askpass program specified Is there a way I can get around this problem? What I want is to copy 2nd parititon to 5th when a user logs in no matter if he is root, admin, Desktop or an unprivileged user. Thanks a lot as always.

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• Why am I unable to mount my USB drive (unknown partition table)?

  - by Pat

  I'm a real newbie to linux. Anyway the problem is that my USB doesn't get recognized anymore which is really annoying because I need information from it. I've read like a zillion threads how to manually mount it but I really can't it to work. I hope it's just some easy, stupid problem where any of you could help me out quickly.. Here is the syslog: kernel: [ 6872.420125] usb 2-2: new high-speed USB device number 11 using ehci_hcd mtp-probe: checking bus 2, device 11: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2" kernel: [ 6872.556295] scsi8 : usb-storage 2-2:1.0 mtp-probe: bus: 2, device: 11 was not an MTP device kernel: [ 6873.558081] scsi 8:0:0:0: Direct-Access SanDisk Cruzer 8.01 PQ: 0 ANSI: 0 CCS kernel: [ 6873.559964] sd 8:0:0:0: Attached scsi generic sg3 type 0 kernel: [ 6873.562833] sd 8:0:0:0: [sdc] 15682559 512-byte logical blocks: (8.02 GB/7.47 GiB) kernel: [ 6873.564867] sd 8:0:0:0: [sdc] Write Protect is off kernel: [ 6873.564878] sd 8:0:0:0: [sdc] Mode Sense: 45 00 00 08 kernel: [ 6873.565485] sd 8:0:0:0: [sdc] No Caching mode page present kernel: [ 6873.565495] sd 8:0:0:0: [sdc] Assuming drive cache: write through kernel: [ 6873.568377] sd 8:0:0:0: [sdc] No Caching mode page present kernel: [ 6873.568387] sd 8:0:0:0: [sdc] Assuming drive cache: write through kernel: [ 6873.574330] sdc: unknown partition table kernel: [ 6873.576853] sd 8:0:0:0: [sdc] No Caching mode page present kernel: [ 6873.576863] sd 8:0:0:0: [sdc] Assuming drive cache: write through kernel: [ 6873.576871] sd 8:0:0:0: [sdc] Attached SCSI removable disk Thanks in advance

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