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• access server from blocked machine

  - by user40994

  I want to access my Linux server(vnc) from a distant machine which has most ports blocked with the exception of 21, 25, 80, 135, and 445. So, I would like to know if theres a way to communicate with my vnc server on the server, while using an available port on client. i.e. port 25 So I think essentially I need the serverside router to forward packets coming in on port 25 to linux server machine(servername, p5900), which should forward them on to itself on port 5900. And when transmitting, I need the server OR to router to send out packets changing their port to 25. Im totally lost on how to acheive this. Please help(much appreciated). Thanks I do not use smtp.

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• How to redesign the UI of a large project?

  - by jem88

  I'm currently working at a quite big Android project (a social network, you can see it here if is useful to answer the question). We decided to restyle the whole app, changing all the UI design. The code I actually have is complex, there are many controllers, and it's a little messy too. Is it "better" in terms of time and code cleanliness to take one controller per time, and rewrite it entirely, or to modify one controller per time? The layout change entirely anyway, so for that I know I've to restart from scratch. Maybe it could seem a stupid question, but with the "time" variable I really can't see the best way.

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• How to move a selcection of files into a new folder via the right click menu?

  - by LinuxDudester

  I recently switch from OSX to Xubuntu 14.04 and I'm loving my new found freedom. For the most part I've managed to customize my Linux operating system to my needs and likes. But theres one feature I'm missing the most. I need to toss a bunch of items in a folder really fast, since I am working with lots of images and text files. In OS X there was a nifty shortcut that manages the operation in one fell swoop so you don't have to make a folder and then take further action to populate it. All I needed to is to select the items I want in the Finder (file manager), right-click on them to bring up OS X's contextual menu, and choose the first option: New Folder with Selection. The Finder will then create a new folder with those items stored safely inside, removing at least one step from the process for you automatically. Super easy! Now I was wondering how can I do this in Linux? Or most importantly in Xubuntu? Any help would be greatly appreciated!

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• How many websites can my server potentially hold?

  - by Daniel Kindler

  Sorry for the "noob" question, but... About how many medium-sized websites with average traffic could this server hold? Just like the average website, kind of like a small business site. How many sites could this server hold, but still maintain nice, decent speed? PowerEdge R510 PE R510 Chassis for Up to Four 3.5" Cabled Hard Drives, LED edit Processor Intel® Xeon® E5630 2.53Ghz, 12M Cache,Turbo, HT, 1066MHz Max Mem edit Memory 8GB Memory (4x2GB), 1333MHz Single Ranked UDIMMs for 1 Procs, Optimized edit Operating System SUSE Linux Enterprise Server 10, SP3, Up To 32 CPU Lic, 1 YR Sub, DIB, Media edit Red Hat Enterprise Linux Licensing Hard Drives 250GB 7.2K RPM SATA 3.5" Cabled Hard Drive edit Hard Drives 1TB 7.2K RPM SATA 3.5" Cabled Hard Drive edit Hard Drives 2 X 2TB 7.2K RPM SATA 3.5in Cabled Hard Drive Hard Drive Configuration No RAID, Embedded SATA Controller for x4 Chassis edit Power Supply 480 Watt Non-Redundant Power Supply edit Thank you!

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• NFS mount of /var/www to OS X

  - by ploughguy

  I have spent 2 hours trying to create an NFS mount from my Ubuntu 10.04 LTS server to my OS X desktop system. Objective: three way file compare between the code base on the Mac, the development system on the local Linux test system, and the hosted website. The hosted service uses cpanel so I can mount a webdisk - easy as pie - took 10 seconds. The local Ubuntu box, on the other hand - nothing but pain and frustration. Here is what I have tried: In File Browser, navigate to /var/www/site and right-click. Select share this folder. Enter sharename wwwsite and a comment. Click button "Create Share". Message says - you can only share file systems you own. There is a message on how to fix this, but the killer is that this is sharing by SMB. It will change the LFs to CR-LFs which will affect the file comparison. So forget this option. In a terminal window, run shares-admin (I have not been able to convince it to give me the "Shared Folders" option in the System Administration window - Maybe it is somewhere else in the menu, but I cannot find it) define an NFS export. Enter the path /var/www/site, select NFS enter the ip address of the iMac and save. On the mac, try to mount the file system using the usual methods - finder, command line "mount" command - not found. Nothing. Tried restarting the linux box in case there is a daemon that needs restarting - nothing. So I have run out of stuff to do. I have tried searching the documentation - it is pretty basic. The man page documentation is as opaque as ever. Please, oh please, will someone help me to get this @38&@^# thing to work! Thanks for reading this far... PG.

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• DNS for route between WAN & LAN

  - by David Maitland

  I have a few machines set up on my internal 192.168.1.* network and i have one public ip, my router is links all ports to on internal linux machine on my network 192.168.1.3. I want to know how to configure the DNS server on my linux box to forward to internal LAN ip's depending on the host name. EG. computer4.83.22.56.12 would find my box then forward to 192.168.1.4 on the local network. This is so i can run multiple web server under one ip. btw, i use Ubuntu. Thanks Dave

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• Framework for interaction between web-page and server-side script

  - by Carrier

  I want to make a web-page that will have several controls elements, among which there are elements like check-boxes, radio-buttons, "range selectors" (one can specify the min and max value, like it is done when you select range for prices in the online markets). The new values shall be sent to the "server-side", once changed (without any Submit buttons etc), and the "server-side" can return something (one or more numbers, etc). Does anyone know a good ajax-like framework that allows (with minimal adaptation / changes) to make such solution in an easy way? It will be good if the server-side of existing solution will be in Perl (not a big deal, but I know it much better than PHP or something else). Set of controls might change and depend on other parameter, so adding one extra element should not cause rewriting the whole thing. P.S.: I haven't working in this area for quite a while, so not aware of existing solutions in this area, and don't want to invent the wheel and write everything from scratch for something that already exist (at least, I hope so). Thanks in advance!

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• VirtualBox VRDP server doesn't start on Windows

  - by quanticle

  I've installed VirtualBox 4.1.8 on a Windows 7 Ultimate host system. I've set up an Arch Linux VM that starts just fine from the VirtualBox GUI. However, when I try to start it with VBoxHeadless --startvm <vm_name> it prints the following Oracle VM VirtualBox Headless Interface 4.1.6 (C) 2008-2011 Oracle Corporation All rights reserved. and then it just sits there. I never get the VRDE server is listening on port 3389 message like when I start a headless VM on a Linux machine. Do I have to configure anything else in order to get the VRDE server to run?

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• Is there an (open-source) ReST-based blogging/forum package out there?

  - by Malvolio

  The site I work on is almost entirely in Javascript, it just goes back (via Ajax) to the server for authentication, database access, things like that. My boss would like me to add blogging, forum, and commenting capabilities. I don't want to implement it from scratch and I certainly don't want to integrate some HTML-generating PHP atrocity. Ideal, I'm looking for a package that does all the backend work and offers ReST interface so I can write a Javascript-based UI that integrates nicely with the existing site. Does such a thing exist?

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• what is the purpose of the files in this directory: /var/lib/apt/lists?

  - by Magpie

  linux lubuntu HD4000 intel ivy-bridge 8gb 1600 ram. I am getting a duplicate entry error message from synaptic package manager and it says the problem is there. I am wondering a few things: What this directory is. Whether it safe to simply delete the offending duplicates from there. Whether this is a useful new discovery... Is this where all the packages I have no use for end up and something I can edit to suit my fancy in the long run? It would be nice to be able to reduce the clutter in my package manager. Especially find a way to get rid of all the 32 bit stuff or older versions of programs I have downloaded manually elsewhere. I had meant to post this in linux! So if this is wrong place let me know and I will move it there!

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• "Cannot allocate memory " error whle copying data from window to ubuntu

  - by John

  I have Ubuntu 9.10 installed inside VM of server 2008. WHen i try to copy the data from the network and paste insid ethe Ubuntu it says error called "Cannot allocate memory " I have 3GB RAM attached to the Ubuntu I tried above suggestion but still im unbale to copy file from my host machine i.e. Windows XP to my Ubuntu machine ( which is at Virtual Machine) Im trying to copy jdk-1_5_0_22-linux-i586.bin file whose size is 47.4 MB Is there any other work around for this problem???? I tried Set the following registry key to ’1': HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache and set the following registry key to ’3': HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\Size but still im unbale to copy file from my host machine i.e. Windows XP to my Ubuntu machine ( which is at Virtual Machine) Im trying to copy jdk-1_5_0_22-linux-i586.bin file whose size is 47.4 MB Is there any other work around for this problem????

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• Computer restarts when I choose my Lucid install from GRUB

  - by Alexx Hardt

  Hey, I have 4 OS's on my netbook, it's really more a toy. However, in my main OS (Ubuntu Lucid) is some data I don't like to lose. Today, whenever I choose this install from GRUB, the netbook (Asus eeePC 1001P if it's of help) waits 5 seconds (no kernel messages) and then reboots. The other entries (backtrack, Linux From Scratch, Windows XP) work fine. Can anyone hint me to where the error could be? It's not GRUB, right? So a reinstall wouldn't help? Is it the kernel? I'm afraid I didn't remember when and what the most recent automatic updates were.

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• Best alternatives to recover lost directories in FAT32 external hard drive?

  - by Sergio

  I have an 320 GB ADATA CH91 external hard drive. I guess it has some problems with the connector of the USB jack. The point is that in certain occasions it fails in write operations generating data losses. Right now I lost a directory with several GB's of very useful information. Since then I have not attempted to write to the disk any more. What tool would you recommend to recover the lost data? The disk is FAT32 formatted (only one partition) and I use both Linux and Windows. What filesystem format would you recommend to avoid future data losses? I currently only use this external hard drive in Linux so there are several available choices (FAT, NTFS, ext3, ext4, reiser, etc.).

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• Acer aspire v3 771G ubuntu 13.04

  - by Jos

  Gooday, i have this acer and i have alot of boot problems (i suspect windows 8) and now i want to try ubuntu but when i use an usb to "try" ubuntu after the boot i get a black screen. now ive read some of the forums and i found something about NOMODESET i have not tried this as i dont know what this does exactly. now i have found this wiki entry https://wiki.ubuntu.com/Bumblebee , i am by far no programmer and always reading all those commands have always kept me of linux because im scared i will !@#$ things up. is there anyway i can go to NOMODESET in the ubuntu "trial" and can i also include the bumblebee futures (coding?) and in how many ways wil this affect my laptops perfomance? reading the bumblebee entry its seems to be something about nvidia optimus and i dont reallt care much for the power saving, but will it affect any performance? im not a heavy pc gamer but i like tho do some gaming and streaming and such also on a rather big TV in wich this laptop already has it flaws in some games not running properly on 65" if this doesn't work or u advise me not to do this what else can i do to fix windows 8 or either some other linux version? i thankyou in advance

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• What version was installed? x64 or i686? What's the difference exactly?

  - by Seppo

  Okay, so heres my problem. I recently started migrating several services to individual VMs on my box, using VirtualBox 4.1. I created a new VirtualBox VM with guest type "Ubuntu (64 Bit)". I've already done this before and it worked like a charm. I then installed unbutu server (12.04) from the exact same dvd image. All the time I thought that it should have installed x64. I already put a few hours work into the new VM, migrating the webserver and mail system etc. Today I tried installing a x64 piece of software and it suddenly told me that it needed x64 and I had only i686. I checked uname -a and this is what it gave me: Linux hostname 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux Any guesses what went wrong? All the time I was thinking I had a x64 system. Any way to move to a "real" x64? I have a second VM on this host which is running x64 just fine .. P.S.: grep --color=always -iw lm /proc/cpuinfo returns lm among the flags.

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• Unable to install ZFS (Ubuntu 13.10)

  - by user209707

  I'm fairly new to Ubuntu and wanted to setup a server running ZFS/XBMC - The XBMC install went fine, however I ran into trouble getting ZFS working. Configuration : Ubuntu 13.10 (GNU/Linux 3.12.0-rc7+ x86_64) I attempted to install ZFS native using : sudo add-apt-repository ppa:zfs-native/stable sudo apt-get update sudo apt-get install ubuntu-zfs This failed to install due to "Module build for the currently running kernel was skipped since the kernel source for this kernel does not seem to be installed." Trying sudo modprobe zfs shows FATAL error : module not found. Here, they mentioned it was to do with lacking build dependences- I followed the answer which was to run sudo apt-get remove --purge ubuntu-zfs zfs-dkms zfsutils spl spl-dkms libzfs1 dkms Then, REBOOT. Then, do: sudo apt-get install linux-headers-generic build-essentia sudo apt-get install ubuntu-zfs " This leaves me in the same situation with "Building only for 3.12.0-rc7+ Module build for the currently running kernel was skipped since the kernel source for this kernel does not seem to be installed." when trying to install ubuntu-zfs. Trying sudo apt-get install --reinstall zfs-dkms also does not work.

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• Creating a game engine in C++ and Python - Where do I start? [closed]

  - by Peter

  Yes, you read correctly, how does humble ole Peter here make an engine using the 2 languages he's proficient in to an extent. I have more than enough time and wish not to use any 3rd party "stuffs" (engine parts like methods, classes etc etc, fully from scratch). If anyone could PLEASE explain how this is done then i will love you forever. Thanks for reading, hoping for some productive answers. Thankyou very much. EDIT: Re read what i've said for the 4th time, forgot to mention; 2D sprite based, with voxels and physics. :D

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• How do I duplicate a Box2d simulation, mid-simulation?

  - by Whyte

  I want to serialize the state mid-game, send it over the network to an identical computer (same CPU, same OS, same binary), load it there, and have the two games run in tandem doing the exact same simulation, without one of them drifting off and going haywire. In short: I want pop-in, pop-out networking support on my HIGHLY physics-intensive game, where sending object coordinates every few seconds is impossible, due to having thousands of objects, and many clients. I tried this with Box2D, and saving an object's location/velocity/etc wasn't enough... there's internal state that's not accessible through any public methods. My current workaround is to force EVERY client to save its entire worldstate and reload it from scratch, whenever a new player connects... but this is obviously bad practice, because it hangs the game for everyone whenever someone new connects. However, it works, with zero desynchronization. So, anyone know of any other techniques that can help me? Or should I just kiss my project goodbye?

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• b43 Firmware Error when trying to install Ubuuntu 14.04 on XP Laptop

  - by WizardNo.7

  I know I'm an Ubuntu and Linux n00b, but I've been browsing the web for a few days searching for a solution, and none of the other b43 posts etc solve my problem. I am trying to install Ubuntu 14.04 on a Fujitsu Siemens Amilo Pro laptop(It's quite old yes, has about 30GB Hard Drive and I think 192mb of RAM) which currently has Windows XP installed(which I'd like to keep for the time being). I have downloaded the 32-bit Desktop ISO and used unetbootin to create a Live USB for this laptop. When I boot from USB, I arrive at the unetbootin Grey and Blue menu and pick either "Try Ubuntu without installing", or "Install Ubuntu". The menu goes away and an Ubuntu loadscreen showing UBUNTU and four dots which progressively change between white and orange. At about the second color changing cycle a white underscore symbol appears next to the fourth dot and flickers, and then I get the usual: [ 95.514833] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found [ 95.514847] b43-phy0 ERROR: Firmware file "b43-open/ucode5.fw" not found [ 95.514855] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all the instruction on this website. After this I have to hard reboot or shut-down. I don't have a previous Linux install so cannot do the apt-get from my previous install. I cannot access the boot options menu by using F6 or similar. Any ideas? Thanks beforehand!

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• cd (change directory) to my home directory on Windows [closed]

  - by deostroll

  Possible Duplicate: Is there a short cut command in Windows command prompt to get to the current users home directory like there is in Linux? Any short way to cd to the user specific directories in the command prompt. Like for e.g. in linux shell (debian based) we do a cd ~ and it instantly takes to the current logged user's directory /home/<username>. Anything to this effect on windows? ps: currently trying to do this on xp machines. If it differs for other machines, mention that too.

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• Ubuntu 10.4 No internet

  - by Keeper780

  I have Ubuntu 10.4 dual booted with Windows Vista on a work Lenovo R61 laptop. The home and work wireless connection were working fine. I lost all internet connection at work. The IT guy clearly knew nothing about Linux. Since he 'fixed' it get nothing, no wlan signal the Network manager icon was gone, no internet. I still have the live disc and if I run from the live disc the connections are there and everything works perfectly. How do I restore the internet easily on my laptop. I have been using Linux for 3 Years but I am still a bit of a newbie, this is the first major problem I've had in three years. It's driving me nuts. Thanks

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• Even distribution through a chain of resources

  - by ClosetGeek

  I'm working on an algorithm which routes tasks through a chain of distributed resources based on a hash (or random number). For example, say you have 10 gateways into a service which distribute tasks to 1000 handlers through 100 queues. 10,000 connected clients are expected to be connected to gateways at any given time (numbers are very general to keep it simple). Thats 10,000 clients 10 gateways (producers) 100 queues 1000 workers/handlers (consumers) The flow of each task is client-gateway-queue-worker Each client will have it's own hash/number which is used to route each task from the client to the same worker each time, with each task going through the same gateway and queue each time. Yet the algorithm handles distribution evenly, meaning each gateway, queue, and worker will have an even workload. My question is what exactly would this be called? Does such a thing already exist? This started off as a DHT, but I realized that DHTs can't do exactly what I need, so I started from scratch.

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• Failed Vista/Ubuntu 12.04 attempt at dual boot. Can only boot Ubuntu now

  - by mathematician1975

  I recently tried installing Ubuntu 12.04 alongside my Windows Vista install. I can boot fine into Ubuntu every time, but now every time I choose to boot into Windows, the process fails completely and restarts (or shuts down) my laptop. Is there anything I can do to recover this. I am very happy with Ubuntu and I do not want to recover my old Vista installation to overwrite it, but I do need to be able to use both OS's. Is it recoverable or should I start from scratch?

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• Dual 7950, freezes during startup

  - by Hiro

  I have two identical video cards right now. Xubuntu will boot up no problem if I only have one card installed. If I install the 2nd card it will just hang midway thru the loading screen. Regardless of which card I use and which position on the motherboard, it will freeze if I have both installed. I've tried installing the proprietary drivers, both fglrx and fglrx-updates, still freezes in the same spot. Uninstalled those and went back to the default ones. The only way I can get a terminal is by booting into failsafe mode. Booting using 13.10 i386 on a USB stick gives me some errors related to what I think is the 2nd video card: [drm:r600_ring_test] ERROR radeon: ring 1 test failed (scratch(0x850C)=0xCAFEDEAD) [drm:r600_dma_ring_test] ERROR radeon: ring 3 test failed (0x02FFFF6B) radeon 0000:0200.2 disabling GPU acceleration"

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• No sound, can't adjust alsamixer volume

  - by user734613

  I have no sound on my ubuntu and I do not know why. I saw a lot of posts about that, I tried a lots of solutions that I found (especially this one) but it still does not work. I suspect alsamixer. I can't adjust the sound. http://img15.hostingpics.net/pics/447765Screenshotfrom20120621140430.png I tried to reinstall alsa mixer using this tutorial but it seems the package does not exist anymore. E: Unable to locate package linux-alsa-driver-modules-3.2.0-25-generic E: Couldn't find any package by regex 'linux-alsa-driver-modules-3.2.0-25-generic' Here are my configuration: cat /proc/driver/nvidia/version NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.40 Thu Apr 5 21:37:00 PDT 2012 GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) aplay -l List of PLAYBACK Hardware Devices ** card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 grep eld_valid /proc/asound/NVidia/eld* /proc/asound/NVidia/eld#0.0:eld_valid 0 /proc/asound/NVidia/eld#0.1:eld_valid 0 Thanks in advance for your help.

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