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• Can I enable discards on a LUKS-encrypted ssd drive in RHEL6 (and do I need to)?

  - by Dan Nestor

  I have a RHEL 6.4 workstation, running on a LUKS-encrypted LV residing on a SSD. I found RedHat documentation stating that dm_crypt does not currently support TRIM passthrough, however I also found other sources that state the opposite (albeit for other distributions) and even that discards are not needed for recent SSD drives which use some sort…

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• Issues with DHCP over multiple subnets

  - by Dan Monego

  I have a cisco router configured to handle multiple subnets (10.1.10.n, 10.2.10.n, etc), and an ubuntu system serving DHCP to the computers served by the router. After a restart of the DHCP, the systems on the 10.1 subnet are fine, but neither the server or the computers configured on the other subnets can see the router at 10.2.10.1 (or…

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• What are the benefits of running a app server in user space, like Unicorn, as opposed to as sudo?

  - by dan

  I've been using Phusion Passenger + Rails/Sinatra for a lot of projects. Passenger runs under the main Nginx or Apache process. But I'm interested in Unicorn, partly because it runs in user space. You just set up Nginx to proxy_pass requests to a unix socket that is connected to Unicorn processes that you fire up under a normal user…

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• Spring-mvc project can't select from a particular mysql table

  - by Dan Ray

  I'm building a Spring-mvc project (using JPA and Hibernate for DB access) that is running just great locally, on my dev box, with a local MySQL database. Now I'm trying to put a snapshot up on a staging server for my client to play with, and I'm having trouble. Tomcat (after some wrestling) deploys my war file without complaint, and…

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• What's the issue with this Samba setup?

  - by Dan Nestor

  I asked this on superuser, but I realized that may be the wrong place. I am duplicating the question here, I hope this is allowed. I am trying to share a directory through samba. In smb.conf I have the following: [global] workgroup = WORKGROUP security = user passdb backend = tdbsam netbios name = <hostname> [share_name] path…

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• Firefox tabs in titlebar - can't drag maximised windows across monitors

  - by Dan

  In Windows 7, you can drag a maximised window from one monitor to the next by dragging the titlebar. However, Firefox 4 now places tabs in the title bar when it's maximised. This means that when I try and drag my Firefox window to the other monitor I end up dragging a tab instead of the whole Firefox window. It's quite annoying, as…

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• Server 2008 won't run executables from CMD prompt without .exe extension

  - by Dan

  On one of our production server 2008 boxes, I cannot run executables from a CMD prompt without supplying the full filename, including the '.exe' extension. For example, when running "java" produced the usual "is not recognized as an internal or external command" message, I assumed I had borked the path and/or java_home variables. …

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• How to control which programs are viewable & accessible via Terminal Services?

  - by Dan

  I know I can control access to programs in Terminal Services (TS) via 'Software Restriction Policies.' But is there a way to show only the programs relevant (i.e. accessible) to the TS user -- something akin to multiple profiles in a regular XP/Vista workstation? Thanks.

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• Can't login to SQL Server after moving machine to different office/domain

  - by Dan

  Our company has just been bought and the over the weekend I have brought up the last few machines to plug into their network (they are under a different Windows Domain). The last machine is our Vault system and the SQL Server was using Windows Authentication. I have plugged it into their network and its working fine, but i cannot…

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• Use Mac Pro as time machine, server and editing station?

  - by Dan

  Background: My fiancée needs a Mac Pro for movie editing and rendering. I need a web server and a backup solution for my MacBook Pro. Idea We thought we could split the costs of the Mac Pro and set it up to act as both a web server and a backup device. Question Is this a good idea? Specifically: Is it easy to set it up to…

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• Is it possible to add an existing Azure VM to an Azure Virtual Network?

  - by Dan Harris

  Didn't think this was directly related to programming, so thought Superuser would be better than Stack Overflow.... Is it possible to add an existing Azure VM to an Azure Virtual Network if you didn't add it to the virtual network at the time of creation? I can't see an option to change which Virtual Network the VM is connected…

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• Reseting Macbook Pro keyboard and trackpad's power usage on Windows?

  - by Dan the Man

  I recently installed a utitlity for Windows (ASUS Ai Charger) which modifies the USB ports on the computer to output more power (for charging iPads, etc). The problem is, I believe it is also giving more power to my keyboard and trackpad. And now, neither devices are working at all, yet they work on Mac OS X. So does anyone know…

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• "Safely Remove Hardware" icon keeps reverting to "Only show notifications"

  - by Dan Parsonson

  I have the 'Safely Remove Hardware' tray icon set to 'Show icon and notifications' to save a mouse click when removing a USB device but every few weeks the setting reverts to 'Only show notifications'. Does anyone know what causes this and/or how I can prevent it? I'm using Windows 7 SP1 64bit with a fairly bare installation…

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• Lightning fast forum based around metadata / tags? [closed]

  - by Dan W

  I wonder if anything like this exists. I'd like to add a forum to my site, but instead of the usual forum/subforum/sub-subforum structure, I'd like to use a metadata/tag approach where everything exists as a single directory, and where there's a search field at the top which instantly (<0.5 sec) filters the threads to a…

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• Blocking an IP in Webmin

  - by Dan J

  I've been checking my /var/log/secure log recently and have seen the same bot trying to brute force onto my Centos server running webmin. I created a chain + rule in Networking - Linux Firewall: Drop If source is 113.106.88.146 But I'm still seeing the attempted logins in the log: Jun 6 10:52:18 CentOS5…

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• Impact of the L3 cache on performance - worth a dual-processor system?

  - by Dan Nissenbaum

  I will be purchasing a new high-end system, and I would like to have a better sense of whether a dual-processor Xeon system (I am looking at the new, high-end Xeon E5-2687W) might, realistically, provide a noticeable performance improvement due to the doubling of the L3 cache (20 MB per CPU). (This is in…

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• Websocket & HTTP proxy with server between two firewalls

  - by Dan

  I have a server ("A") running behind a firewall, which serves HTTP and websockets. I have no control over the firewall, but do have an external server ("B") to which the internal server can connect (note that the reverse connection from B to A is not possible due to the firewall). How can I set up some…

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• DNS request times out then succeeds on my local network. Why?

  - by Dan

  I have a W2K3 Server that is the Domain Controller and also the DNS server. I wanted to make another DNS zone on my network called "something.local" and then make 'A' records to point requests like 'admin.something.local' and 'www.something.local' to machines on my network. I keep getting DNS timeouts…

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• Ubuntu (9.1) behind a ISA proxy

  - by Dan

  I have set up a Ubuntu PC on a next work that is behind a ISA Proxy. When I run the command sudo apt-get update I get several messages with this message: 502 Proxy Error (The ISA Sever denied the specified Uniform Resource Locator) The computer can see the internet and adding the proxy…

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• How do I make my Boot Camp partition bootable again?

  - by Dan Herbert

  I needed to resize my Boot Camp partition so I used Gparted to move and resize it. This seemed to work, except that now I can't boot into Windows. I can boot into OS X just fine. OS X can recognize the Boot Camp partition and view its contents. When I try to reboot into Windows, however I get…

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• Package problems after upgrade

  - by Dan

  I installed a new upgrade on ubuntu which seemed to fail near the end. Now I'm being told that an error has occurred and to please run apt-get to see what's wrong. After some further tries with that I eventually gave up. It seems there's a left over latex package(?) somewhere and I can't seem…

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• Mounted HDD not having enough permissions from Apache/PHP

  - by Dan

  Piwigo gallery, on apache and php, CentOS 6. The root system is a RAID 128GB. /var/www/html is on the root file system. Mounted the 320GB hdd to /var/www/html/320 using defaults, it's an ext4 fs. Put a symlink to it in /var/www/html/galleries which is read by the gallery script so I can…

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• Does it make any sense to install anti-virus on Windows XP Mode?

  - by Dan

  This is almost certainly a dumb question, but... say I have Windows 7, with some anti-virus software installed, and I am using Microsoft's Windows XP Mode to run some legacy applications as well. Is there any reason why I would want to install an anti-virus program in XP mode as well?

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• Windows 7 Aero Theme when on Battery

  - by Dan Revell

  Windows 7 has the full and basic aero themes that can be changed inside personalization. Windows used to automatically disable Windows Aero (transparency) when I unplug my laptop from the mains. I reset the theme and now it doesn't do this anymore. I can't seem to find how to enable this…

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• How do I take screenshots in Windows Virtual PC

  - by Dan Neely

  When I press Alt-Print Screen I get a screenshot of the entire VM+window frame taken in my host-OS. What I want is a screenshot of the selected application running in the VM. My host OS is win7-64 enterprise. The VM is running XP Pro.

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