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• Can't get PXE boot working on WDS + Linux DHCP server

  - by askvictor

  Hi I'm trying to get WDS to PXE boot some laptops. The university is running a (linux) DHCP server for the entire network; we can't run our own. We can (and have) set options in that DHCP server to point to a tftp server and file (pxeboot.n12 on the WDS server we run). The client seems to get the pxeboot.n12 file (judging by the server logs), but then comes back with 'TFTP download failed Pres any key to reboot'. I've tried running a third-party tftp service on the WDS server, and found that the client pulls the first stage (pxeboot.n12) correctly, but then looks for the second stage (bootmgr.exe) in the root of the tftp folder - whereas WDS places it in \boot\x86\ (or \boot\x64). Similarly, it looks for a file called BCD, which doesn't exist (rather there are a few files scattered around with the extension .bcd). I'm confused if the WDS tftp server does some magic returning certain files, or if I haven't configured it correctly. The server is 2008 R2. Cheers, Victor

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• Windows 7 Not Recognizing Any Hardware, Linux Recognizing Hardware

  - by Newb

  I have a new desktop computer with two SSDs: one running Linux Mint 15 (SSD1), the other running Windows 7 (SSD2). My mint runs perfectly - USB wireless adapter is recognized, SSD2 (connected by SATA) is recognized and accessible through the filesystem, Ethernet works, etc. However, my Windows 7 is not recognizing any of these devices - even plugging in a regular ethernet cable doesn't work. It seems that it's not recognizing any network adapters, and it also doesn't recognize SSD1, connected to the mainboard by SATA. I've installed, uninstalled, and reinstalled Windows multiple times, but the problem persists. I used the Windows 7 CD to install Windows on a machine previously, and that time around, I didn't have any problems, which leads me to suspect that this might be a hardware issue, specifically with the mainboard. My mainboard is an MSI-7641 model, the 760GM-P34 FX. It uses an AMD Chipset and an AMD processor. Can anyone suggest what might be wrong, and how to fix it?

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• Linux: setting up an elite/high-anonimity Web proxy on a dedicated server

  - by YellowSquirrel

  I'm renting a dedicated server which I'd like to use to "surf the Web": basically I want to always surf the Web from the same static IP (the one of my dedicated server). I can do it by running Xvnc/FreeNX on the dedicated server, but this is kinda slow and clumsy (I tried it). What are the steps needed to install an "elite/high-anonimity" Web proxy on a dedicated (Debian) Linux server knowing that my two requirements are: I'm the only person that needs access to the proxy all I want is that my broadband (dynamic) IP is completely hidden (I want to always surf from my dedicated server's IP). Note that using the static IP people can find my domains and my real name and I'm perfectly fine with that (actually it is what I want). What I don't want is people knowing from which dynamic IP (broadband) I'm connecting. What are the steps needed to do that? (basically I don't care about "anonimity", what I want is to appear to surf from a static IP and I think I need what is called an "elite" Web proxy to do that, but I'm not sure) Technical infos and sample configuration most welcome :)

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• LAMP/TURNKEY LINUX/VIRTUAL BOX: Manipulating Files on a Virtual Machine

  - by aeid

  Hi, I am running Ubuntu 9.10 and I want to install turnkey linux's LAMP server on my machine to test out my code. I installed Turnkey LAMP via VirtualBox and it seems to be working because I can access the http://localhost. My question is: How do I manipulate files via VirtualBox? For example, if I had installed LAMP on my machine (not on a virtual machine), I could easily add/edit/delete files in the var/WWW folder. Where is the equivalent of "WWW" folder on Virtualbox and how can I interface with it? Thanks,

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• Add linux user with restricted access

  - by Dominik Str

  I need to create a user on linux with access rights only to one folder. Background: I have installed git on my virtual server (Debian). I also created a user for the repository. There is a lot of private data on the server. But all folders have read-access for others, because it's needed for the applications which run on the server. So the git-user can see all the data. I would like to restrict the git user only to the folder where the repository is installed. I also tried ACL, but it didn't work. Is there a better way to do this? Thanks in advance!

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• Linux driver for Intel ICH10R

  - by Pablo Santa Cruz

  Hi! I would like to know what 64-bit Linux distribution can I use with an Intel ICH10R RAID. I have tried CentOS 5.2 and Ubuntu Server 8.04. Neither support that raid controller. Also, I would like to know where do I setup the RAID-5 I want to use. I am using a TYAN S7002 motherboard and the BIOS software does not include an option to configure the RAID as I am used to do with Dell servers... Thanks a lot in advance.

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• Replication in PG 9 between Windows and Linux boxes

  - by mlaverd

  I have PostgreSQL 9 running on Windows 2003 SP2. I am trying to replicate it on a Fedora 12 system running PostgreSQL 9 as well. I am hitting this error message: /usr/pgsql-9.0/bin/postgres -D /var/lib/pgsql/9.0/data/ -p 5432 2011-02-11 17:43:26 ISTFATAL: incorrect checksum in control file Because of firewall restrictions, I could not follow the official instructions to the letter. Instead, I zipped the contents of the data directory when the server was offline and copied that to the Linux box. I ran a sha1deep on both directories and there were no mismatches. I changed the rights so that only the postgres user and group had access to the files. Now, what can I do for replication to work? I tried with a 'pg_dumpall', but the system complains that the database IDs do no match.

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• Fastest light-weight image viewer over forwarded x11 session (linux)

  - by Matthew

  I have a slow network connection over which I'm forwarding x11 over ssh. I want to view images on the remote host (Ubuntu) quickly and efficiently. I'm looking for an image viewer that will take into account the image viewer window's resolution and downsize the image before sending it over the network, instead of sending the full size image. The images I want to view will be around 5MB and I only need to be able to browse through tiny thumbnails of the images to identify the image I'm looking for. It is not necessary to be able to see more than one image at a time. Highest speed over slow network connection is the priority. Thanks! Matthew EDIT: It's possible that the way x11 forwarding works, only the image at the display resolution will be transferred anyway. If that's true, please confirm and the question still stands for which image viewer will be the fastest over a slow connection

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• Gnu/Linux package manager, multiple versions, no root privilege

  - by user744629

  I'm looking for a Gnu/Linux package manager, that can help to package, distribute, install sofware (actually scientific libraries), like this: do not required root privilege, for example, install in $HOME/opt or $HOME/local manage muliple version of a library, for example, with this directories organisation: $HOME/opt/somelib/4.2.1/lib/ $HOME/opt/somelib/4.2.1/include/ $HOME/opt/somelib/4.2.1/bin/ $HOME/opt/somelib/4.2.2/lib/ $HOME/opt/somelib/4.2.2/include/ $HOME/opt/somelib/4.2.2/bin/ $HOME/opt/anotherlib/1.0.0/lib/ $HOME/opt/anotherlib/1.0.0/include/ $HOME/opt/anotherlib/1.0.0/bin/ package contains source files, not binaries, build is performed during install. support for Mac OS X too would be good. Then it's up to the user to manage it's LD_LIBRARY_PATH, or compile with -L/good/path etc. Does it exists?

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• Recover Windows 7 from Linux Ubuntu?

  - by macha

  I have two partitions and have Linux Ubuntu running on one partition and Windows 7 running on the other. Now when I try to boot from Windows 7, I get an error saying the /system32/winload.exe file is corrupted or deleted. Now I have Windows 7 files on my system but do not have the DVD, I have made USB bootable with Windows 7, but when I boot it with the USB stick, a blue screen is coming on with weird errors messages. Now I am trying to restore my Windows instance to a restore point where it can work normally. How can I do that in my situation?

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• PHP shared extensions on Linux

  - by F21

  I am running Ubuntu Server 12.04 and prefer to compile PHP myself as opposed to installing it using apt-get. PHP is running as PHP-FPM. When compiling extensions, I can set it to be compiled as a shared extension using something like --with-bcmath=shared and so on. Are there any benefits to compiling the extensions as shared? I also noticed that the extensions are compiled into a pretty convoluted folder. On my system (my php prefix is /usr/local/php-5.4.9) the extensions end up in /usr/local/php-5.4.9/lib/php/extensions/no-debug-non-zts-20100525. Is there a global way to set a folder so that all shared extensions will be compiled in there? I understand that I can do something like --with-foobar=shared,/usr/local/foobar/ but having to set the extension folder for each shared extension is inefficient and error-prone.

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• Linux Mint Wireless doesn't connect [migrated]

  - by guisantogui

  I'm having a great problem, I've installed Linux mint debian edition (LMDE), and following this tutorial http://community.linuxmint.com/tutorial/view/161 I did installed the network driver. The available connections appears to me, but when i try to connect to my connection at first time, I got this message: "(4) Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." And the following tries, I got this another message: "(32) Insufficient privileges." I'm accepting ideas. Thanks.

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• Connecting Snow Leopard 10.6.4 to a Linux shared folder using Samba

  - by Vittorio Vittori

  Hi, I'm trying to connect to a web server running on Linux CentOS 5.5 where I've shared a folder. I'm trying to connect to the directory with Snow Leopart 10.6.4 client without success. On CentOS I've started the Samba service and a Samba user with his password and then I've tried to connect to the server with the command smb://10.0.0.7 to reach the IP of the machine and then writing the username and password I've previously created. The server returns me the list of the shared folders with the leopard specific browser, when I click to the folder I want the browser returns this error (translated from Italian): Leopard message: Connection failed There was an error on connecting to "smb://10.0.0.7". Please verify the name or the IP of the server, and try again. How can I do to solve the connection problem?

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• Which software could I use to setup a 4in6 IP tunnel (RFC 2473) on GNU/Linux

  - by Mildred

  Here is my problem. I have a server A that has two IP addresses. One public IPv4 and one IPv6. Server B has only one IPv6 address. I want to host most of my services on server B (because I have more disk space on it, I can control it better) but I need the IPv4 of the server A. I would like to set up a 4in6 tunnel (RFC 2473) between A and B so that I can transfer the traffic from the IPv4 address in A to B. If needed, I can request another IPv4 address on the server A, but I'd prefer not to. My question is: which software use to do the 4in6 tunnelling? I suppose OpenVPN can do the thing, but is there any implementation of the 4in6 protocol on Linux? A little more challenging: the IPv4 address comes from a venet interface, which cannot be bridged. How could I transfer ownership of this address I don't use on server A to the server B? Thank you

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• Mono on Linux: Apache or Nginx

  - by Furism

  Hi, I'm developing an ASP.NET application that will be run under Linux/Mono for various reasons (mostly to stay away from IIS, quite frankly). Of course the first web server I had in mind was Apache. But Apache, for all its advantages, adds a lot of overhead. Also, the application I'm building needs to be highly scalable and performance is one of the main concern. Apache has, obviously, a very good reputation and its record speaks for itself, but I don't need things like Reverse Proxy or Load Balancing because dedicated network devices would be used for that. So those modules from Apache will never be used. So basically my question is: since Nginx seems to fit exactly needs, is there any caveat I should be aware of? For instance, is Nginx renowned to be particularity safe? When security flaws are detected, how fast are they patched? Any insight on the pros and cons of using either of those servers in conjunction with Mono is welcome.

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• linux firefox flash debug: i don't get alerts when errors occur

  - by ufk

  Hello. I use firefox 3.6.13 on linux gentoo amd64 and flash 10.2 debug version, i also have firebug flashbug and flashfirebug installed. my problem is that whenever I run a flash application that encounters an error, the browser does not open an alert window. it makes it more difficult to debug applications because i need to make sure that the firebug window is always opened. the only way i can see the error is if i open the flash tab in firebug. is there a way to change this behavior ? i checked .xsession-errors and tried running firefox from console: these are the only errors the i see in the log and these errors do not appear when the flash app encounters an error which means they are not related: Gtk-Message: Failed to load module "canberra-gtk-module": libcanberra-gtk-module.so: cannot open shared object file: No such file or directory Gtk-Message: Failed to load module "gnomebreakpad": libgnomebreakpad.so: cannot open shared object file: No such file or directory thanks

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• X forwarding over SSH from Mac to a Linux box

  - by Checkers

  I need run Mac applications on a remote Mac machine and display it on a local Linux machine's X server (a lot of articles on the Internet seem to be detailing how would you do it the opposite way). $ ssh -X mac-box $ cd /Developer/Applications/Xcode.app $ ./Contents/MacOS/Xcode Sat Oct 3 20:41:26 mac-box.local Xcode[15634] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged. _RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL. ^C My $DISPLAY variable appears to be empty. What should it look like so that forwarding works correctly? Can I run OSX applications this way at all?

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• LAMP/TURNKEY LINUX/VIRTUAL BOX: Manipulating Files on a Virtual Machine

  - by aeid

  I am running Ubuntu 9.10 and I want to install turnkey linux's LAMP server on my machine to test out my code. I installed Turnkey LAMP via VirtualBox and it seems to be working because I can access the http://localhost. My question is: How do I manipulate files via VirtualBox? For example, if I had installed LAMP on my machine (not on a virtual machine), I could easily add/edit/delete files in the var/WWW folder. Where is the equivalent of "WWW" folder on Virtualbox and how can I interface with it? Thanks,

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• Coding exercise for Linux Systems Admin?

  - by Prashanth Sundaram

  Hello All, I am preparing for a Systems Admin(linux) role for a big company(top 10 companies) and one of the requisite is knowledge of a language like perl, python or Ruby. I have a phone interview which involves sharing a editor with the interviewer, now what kind of coding exercise can I expect on a phone interview or a regular interview? I have used shell for most of my day-to-day tasks and occasionally Perl and python for bigger tasks. Now I don't expect them to ask Write a script that sync's AD users to LDAP? I don't think data structures, algorithms or sorting questions apply to me role? Can you give me any examples of SysAdmin related coding questions?

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• Compressed filesystem inside a file in Linux [migrated]

  - by Doc

  I have a flash drive which is FAT32 formatted. I want to put a linux filesystem on the drive inside a file. I know I can do this by creating a file and formatting is with ext3 (or any other file system) and then mounting it with the -o loop option. What I would like is that the above filesystem be compressed. Essentially something like a read-write squashfs. Is there something that exits that I can use? Additional bonus if the file can be stored as sparse, i.e. the file re-sizes as data is written or deleted.

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• Internet not working on a VirtualBox Linux machine

  - by mtahmed

  I installed VirtualBox on a Windows 7 PC and installed Xubuntu (Ubuntu with XFCE) on it. Now on the Windows, I am connected to the internet through a LAN which automatically authenticates to connect to the network(because its my work computer). I have also installed the guest additions on this virtual machine (Xubuntu). I tried both NAT and bridging to set up internet connection but I still cannot connect to the internet. For NAT: The browser doesn't say website not found but it keeps trying to load it forever and the network status monitor (the one provided by VirtualBox) doesn't show any green light (no incoming packets). For Bridging: Same as for NAT but the network status monitor shows incoming packets and outgoing packets. But internet still doesn't work. I tried a lot of different things but none worked.

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• Vim and mouse with ssh from Mac to Linux

  - by Jonatan Littke

  Hey. I certainly know it's possible to make the mouse work in Vim on a remote session to a Linux machine from my Mac, but I haven't figured out just how. Daily vim gives a tip on making it work but if I try to set 'mac-ansi', for example, I get an error saying I can only specify values beginning with builtin_ (riscos, beos-ansi, etc). I've tried using ssh -X, combined with set mouse=a and set term=builtin_anso for example, but with no success with or without combining them. I'm using Snow Leopard and attempting to use the mouse on a Debian machine with vim 7.1.314. I've had a look at the documentation but can't make it work. Any tips?

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• (simple) linux HA with vmware vsphere?

  - by derhelge

  I hope my upcoming question is specific enough, and you are able and willing to support :-) We have several openSUSE VMs in an ESX-Cluster (three ESX-Servers) with an attached iSCSI-SAN. All of those Linux VMs are "single point of failure"-configured, which means in the case of a Web-Server: LAMP, storage, etc. everything on this machine. This was very simple and in case of a failure (in the last years: kernel panics or apache crashes) a simple reboot triggered by a script did it. But the problem is: How to upgrade/maintain the w(eb-)application or the underlying OS without downtime? This wasn't really managable and i did this in the early morning ;) How can i achieve a "simple" High-Availability Cluster now? I thought of: DRBD with heartbeat with 2 VMs. And for the storage a RDM (raw device mapped) LUN and change the read-write-permissions for both VMs. Is this a good idea? Anyone has a better solution?

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• Run .sh file in linux machine via putty

  - by Prateek

  I want run an .sh file which take an argument in a Linux machine. I'm using plink.exe to execute this .sh file from a windows machine. But I don't know what to write in the batch file in order to run plink.exe which in turn executes the .sh file and this file arguement. I have written following batch command: @echo off start C:\Users\Prateek\Desktop\PLINK.EXE -ssh -P 22 user@host -pw password sh -x "/home/user/copy.sh" On executing it, I get: + echo '' + echo 'Enter partner id' Enter partner id + read pid : Actually 'Enter partner id' is the argument, which I need to pass.

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• Create manual IPSec policy on Window (like spdadd and add on Linux)

  - by hapalibashi

  Hello On Linux it is possible to create an a manual IPSec (no IKE etc) tunnel thus: spdadd 192.168.0.10/32[5066] 192.168.0.11/32[5064] udp -P in ipsec esp/transport//require; add 192.168.0.10 192.168.0.11 esp 2222 -m transport -E des-ede3-cbc "123456789012123456789012" -A hmac-md5 "1234567890123456"; I need to do the same on Windows. I am aware of netsh but I don't think its equivalent, I need to specific the SPI (thats the 2222 above) and this seems impossible. Any ideas or alternatives?! Thanks, Stuart.

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