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• "A device attached to the system is not functioning" when reconnecting to XenApp 6 session

  - by Paul Doom

  A few of our XenApp 6 customers are seeing issue sometimes when users move from one workstation to another and try to connect to their running session. An error box pops up with "A device attached to the system is not functioning" This is on healthy 2008 R2 servers with all Citrix hotfixes applied. After the error, the user's session must be logged out before they can get back in. This was posted here: http://forums.citrix.com/thread.jspa?threadID=273457 , but is not answered. There is nothing telling in the event logs, and it is an inconsistent problem. Has anyone else seen this issue of found a fix?

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• Ubuntu: On-screen keyboard

  - by Paul Lammertsma

  On a similar note to this question, I recently booted Ubuntu to recover a Windows partition, but couldn't in any way get the keyboard to register. I recall back in 8.x that you could easily reach the on-screen keyboard (Virtual Keyboard?) via "Assistive Technologies". It seems to have disappeared since 9.x. For future reference, how can I easily get to it? Recall that in this scenario I won't have a keyboard to enter terminal commands (e.g. to install xkbd or something of the like).

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• APC Smart UPS network shutdown issue

  - by Rob Clarke

  Here is a bit about our setup: We have 2x Smart-UPS RT 6000 XL units with network management cards We are running Powerchute from a network server Powerchute is connected to the management cards of both UPSs UPSs are set to do a graceful shutdown via Powerchute when the battery duration is under 20 minutes We also have a command file that runs with Powerchute Although our setup is redundant we do not have an equal load on each server due to APC switches for single power devices The problem is that as we do not have an equal load on each server the batteries drain at different rates. This means that the UPSs both get to the specified low battery duration at completely different times. The problem here is that UPS 1 may have run down to 5 minutes and is in desperate need of initiating a Powerchute shutdown - UPS 2 still has 25 minutes of runtime so no shutdown is initiated. Consequently UPS 1 goes down and takes all the servers with and then shuts down UPS 2 as well! What we need to happen are 1 of either 2 things: Powerchute initiates the shutdown as soon as either UPS reaches the 20 minutes low battery duration setting - and doesnt wait for both The UPS with the heavier load expends its entire battery but does not shutdown both UPSs and lets the load be switched across to the UPS that still has runtime remaining. That way when the UPS that still has runtime reaches its low battery duration it can proceed with the graceful shutdown via Powerchute. Hope that makes sense, any help is greatly appreciated!

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• Apache2 graceful restart stops proxying requests to passenger

  - by Rob

  Issue with apache mod proxy, it stops proxying requests after a graceful restart but not all the time. It seems to happen only on a Sunday when a graceful restart is triggered by logrotate. [Sun Sep 9 05:25:06 2012] [notice] SIGUSR1 received. Doing graceful restart [Sun Sep 9 05:25:06 2012] [notice] Apache/2.2.22 (Ubuntu) Phusion_Passenger/3.0.11 configured -- resuming normal operations [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(492) failed in child 26153 for worker proxy:reverse [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(486) failed in child 26153 for worker http://api.myservice.org/api [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(487) failed in child 26153 for worker http://api.myservice.org/editor/$1 [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(489) failed in child 26153 for worker http://api.myservice.org/build [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(490) failed in child 26153 for worker http://api.myservice.org/help [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(491) failed in child 26153 for worker http://api.myservice.org/motd.html [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(480) failed in child 26153 for worker http://api.myservice.org/api [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(481) failed in child 26153 for worker http://api.myservice.org/editor/$1 [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(483) failed in child 26153 for worker http://api.myservice.org/build [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(484) failed in child 26153 for worker http://api.myservice.org/help [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(485) failed in child 26153 for worker http://api.myservice.org/motd.html [Sun Sep 9 05:25:06 2012] [error] proxy: ap_get_scoreboard_lb(479) failed in child 26153 for worker http://api.myservice.org/motd.html After these lines, the logs are flooded with 404's because the requests are not being proxied. It's worth noting that the destination is just another vhost on the same apache instance, but the vhost (http://api.myservice.org) is serving passenger (mod_rails) I was thinking that maybe there's some startup issues with the passenger workers not being ready during a graceful restart? After a full restart resolves it and everything returns to normal. //Edit Here's the vhost config, thanks :) <VirtualHost *:80> UseCanonicalName Off LogFormat "%V %h %l %u %t \"%r\" %s %b" vcommon <Directory /var/www/vhosts> RewriteEngine on AllowOverride All </Directory> RewriteEngine on RewriteCond /var/www/vhosts/%{SERVER_NAME} !-d RewriteCond /var/www/vhosts/%{SERVER_NAME} !-l RewriteRule ^ http://sitenotfound.myservice.org/ [R=302,L] VirtualDocumentRoot /var/www/vhosts/%0/current # Rewrite requests to /assets to map to the /var/file-store/<SERVER_NAME>/ RewriteMap lowercase int:tolower RewriteCond %{REQUEST_URI} ^/assets/ RewriteRule ^/assets/(.*)$ /var/file-store/${lowercase:%{SERVER_NAME}}/$1 # Map /login to /editor.html as it's far friendlier. RewriteCond %{REQUEST_URI} ^/login RewriteRule .* /editor.html [PT] # Forward some requests to the API ProxyPass /api http://api.myservice.org/api ProxyPass /site.json http://api.myservice.org/api/editor/site ProxyPassMatch ^/editor/(.*)$ http://api.myservice.org/editor/$1 ProxyPassMatch ^/api/(.*) http://api.myservice.org/api/$1 ProxyPass /build http://api.myservice.org/build ProxyPass /help http://api.myservice.org/help ProxyPass /motd.html http://api.myservice.org/motd.html <Proxy *> Order allow,deny Allow from all </Proxy> # TODO generate slightly more specific Error Documents for 401/403/500's, # but for now the 404 page is good enough ErrorDocument 401 /404.html ErrorDocument 403 /404.html ErrorDocument 404 /404.html ErrorDocument 500 /404.html </VirtualHost>

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• removing the .local in local network name serving

  - by Paul Nathan

  I have several local machines; I use a OSX 10.6 machine to do most of the serving. Annoyingly, it postfixes its network name with .local. How would I set up a system so that I could access it by its hostname? server: httpd apache2 default install I am accessing it with a web browser(surprisingly). also when I ping my osx machine as name, it doesn't work; ping name.local does work.

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• SQL Server Log File Size Management

  - by Rob

  I have all my databases in full recovery and have the log backups happening every 15 minutes so my log files are usually pretty small. question is if there is a nightly operation that causes lots of transactions to happen and causes my log files to grow, should i shrink them back down afterward? Does having a gigantic log file negatively affect the database performance? Disk space isn't an issue at this time.

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• Bought a 1U server, now can't find rails

  - by Paul Tomblin

  I bought a 1U server used on eBay (a Supermicro motherboard, but branded "Asempra"), and I also bought a set of "Supermicro" rails, but unfortunately the rails didn't fit the server. The side of the server looks like: Can you tell me where I can find rails for this machine?

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• Internet Connection not working - USB LAN connection - from particular modem

  - by Paul

  I am trying to fix Internet connection on a friends Dell inspiron 1720 with XP service pack 3. It has an integrated network card that stopped working, after powering down/up the modem still didnt work I brought it back to my place to try a few things ie check cable, update driver etc... still didnt work. So I bought a USB LAN connector. It didnt work straight away but I went to configure the properties and changed the ConnectionType from AutoSense to 100 BaseT 10BaseT Full_Duplex, I basically just tried them all. From my place when connected to my desktop - 10 BaseT and 10BaseT Full_Duplex worked. From my place When connected to their laptop - 10 BaseT and 10BaseT Full_Duplex worked. Happy I went back to my friends house confident it would all work, and it didnt. Brought it back to mine and it did. While there, in Network Connections the connection is there recognized, enabled, 'working properly' it just says not connected. Also there is no led on the USB connector While at mine as above except there is an led on the USB connector and it says connected. Other difference I can think of is they have a cable modem, I'm plugged into the back of a Belkin wireless router - would this make a difference? Any other ideas what to try? (Would getting the model of the cable modem help anyone?) The USB connector is "DM9601 USB to Fast Ethernet"

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• mod_rewrite REQUEST_FILENAME doesn't contain absolute path

  - by Paul Dixon

  I have a problem with a file test operation in a mod_rewrite RewriteCond entry which is testing whether %{REQUEST_FILENAME} exists. It seems that rather than %{REQUEST_FILENAME} being an absolute path, I'm getting a path which is rooted at the DocumentRoot instead. Configuration I have this inside a <VirtualHost> block in my apache 2.2.9 configuration: RewriteEngine on RewriteLog /tmp/rewrite.log RewriteLogLevel 5 #push virtually everything through our dispatcher script RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^/([^/]*)/?([^/]*) /dispatch.php?_c=$1&_m=$2 [qsa,L] Diagnostics attempted That rule is a common enough idiom for routing requests for non-existent files or directories through a script. Trouble is, it's firing even if a file does exist. If I remove the rule, I can request normal files just fine. But with the rule in place, these requests get directed to dispatch.php Rewrite log trace Here's what I see in the rewrite.log init rewrite engine with requested uri /test.txt applying pattern '^/([^/]*)/?([^/]*)' to uri '/test.txt' RewriteCond: input='/test.txt' pattern='!-f' => matched RewriteCond: input='/test.txt' pattern='!-d' => matched rewrite '/test.txt' -> '/dispatch.php?_c=test.txt&_m=' split uri=/dispatch.php?_c=test.txt&_m= -> uri=/dispatch.php, args=_c=test.txt&_m= local path result: /dispatch.php prefixed with document_root to /path/to/my/public_html/dispatch.php go-ahead with /path/to/my/public_html/dispatch.php [OK] So, it looks to me like the REQUEST_FILENAME is being presented as a path from the document root, rather than the file system root, which is presumably why the file test operator fails. Any pointers for resolving this gratefully received...

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• Powershell not displyaing Unix colors

  - by Paul Nathan

  I use various Linux programs on my machine; some of them have colorized output. However, Windows Powershell does not support Linux colors; it get a message like so ?[0m31m(which is the color control code), and renders that instead of the color. Is there a way around this?

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• With modern PC systems, what less-than-optimal designs have we inherited?

  - by Rob Kam

  What have been less than optimal design choices, that are now (almost) immutable features of the modern PC system, and what constraints led to these choices? There have been a great many of these. For example the qwerty keyboard is widespread although the Dvorak keyboard might be a better choice. I guess this is something to do with the teletypes that were used as early computer keyboards, which had originally been modified from typewriters.

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• Decrypt column in SQL 2008

  - by Paul

  I need to decrypt a column in a table that has previously been encrypted at application level. The algorithm is DES at 192 bits and block size = 64. I have the password but DecryptByPassPhrase doesn't seem to work.

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• Gnome not working well with NoMachine

  - by paul

  First of all, NoMachine is working for me. However, at some point with my Ubuntu/Gnome machine, I got an update for Gnome and now when running NoMachine I no longer get all of the theme elements. For example the panels are there but with the default or stock colors. This is true for the icons as well. Does anybody know a solution for this problem?

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• Building a Media Center PC with Comcast Cable...?

  - by Rob

  Alright - so this might be a stupid question but I've never been all that much into TV. I currently have Comcast cable. I've just got the 'basic' 2-60 package or whatever; I've just always plugged the cable into the back of my TV. I've never had a cable box. Recently, Comcast has been pulling channels off of my line-up. Most recently, the stole the TV Guide channel from me. I'm told this is part of a push to get customers to switch to their digital line-up. But, I'm also told it requires some sort of digital receiver for each TV you've got. I don't want to buy a bunch of these digital receivers and I don't want to pay the monthly rental fee...but I have heard of how awesome media center PCs are and some really cool things they can do. And, I've got loads of PC parts sitting around. So, can someone guide me through this a bit? Are there computer video cards or TV tuners that are going to work with Comcast's digital cable? What kind of price range are we looking at?

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• iPhone Missing Apps in some Directories

  - by paul simmons

  Hi, I was moving iPhone applications directory, and ended in a result that some applications are missing from Springboard. As far as I can see, the apps in /Applications/GUID-LIKE-DIRECTORIES are missing like Facebook; however I see they are in /Applications if I check with SSH. Any help?

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• Delay after commit before Redmine comments ticket

  - by Paul

  I was used to having a post-commit hook trigger processing of the commit message by Trac (SVN repository). The comment (or action) was added immediately. Now I switched to Mercurial as a VCS and Redmine as a ticketing system. Redmine does recognize information in changeset/commit messages like "refs #185" - but it takes several minutes to appear in the ticket. Any ideas why this is? Is the routine to grab the changesets called periodically somehow?

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• Lexmark C532 error code won't go away

  - by Paul Phillips

  I can't get rid of error code 84 - Yellow PC unit missing. I've just replaced all 4 photoconductors with genuine Lexmark parts and now the error code keeps appearing. I've swapped the PC units around so know it's not a faulty unit. I've followed the suggestions in the online Lexmark manuals and even called the Lexmark helpline but to no avail. any suggestions? Printer was fine until it gave me a PC unit life warning and I renewed them. Thanks.

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• Intel Pentium D & Intel Core 2 Duo

  - by Paul

  Is Intel Pentium D and Intel Core 2 Duo is the same? Please reply.. Thanks!!! God Bless u All..

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• Changing Recovery Model in Replicated Database

  - by Rob

  I now am the proud owner of two servers that replicate with each other. I had nothing to do with the install, but (of course), now i have to support the databases. Both databases are in the Simple recovery model, but the users want to ensure as little data loss as possible so I'm thinking that I should change the recovery model over to full and start doing transaction log backups. I wasn't planning on backing up the subscribing database, only the publisher. Is this the right plan? Do I need to switch both the Subscriber and and the publisher to Full, or can I leave the subscriber in Simple, but have the Publisher in Full? When I change the recovery model in one (or both) do the databases need to be offline? Thanks

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• DNS issue for internal website routing internet connection from remote location

  - by Michael Paul

  I have an issue that I could use some help with. Our company has a main location and a remote location. Previously, the remote location was connected to the main location through an internet connection VPN tunnel. The connection was pitifully slow at 1.5Mbps, so we upgraded it with a 75Mbps direct link. That meant the remote location lost it's internet access, so we routed their access through the main office internet connection. Everything works perfect except for one thing. The website we host is not accessible from the remote location unless the IP address is used. If I do NSLOOKUP on our website address from a machine connected to the main location network, it resolves correctly to the inside IP address. However, if I do the same from a remote location machine, it resolves to the website's outside IP address. Our internal DNS server(s) have a pointer and CNAME records set up, and everything was working perfectly before the connection was upgraded. In addition, the remote location has a domain controller, DNS server and DHCP server to service these requests at the remote location and prevent these requests from getting routed back and forth over the link. So I think was it happening is that for some reason the DNS server at the remote location is not resolving our website name correctly and passing the requests on to the routers, which then push the request out to the internet DNS system. That resolves the name to our external IP. This is purely a DNS issue, everything else works just fine. I am just stumped on this one. Any ideas on how to fix this? Edit: I forgot to mention that at the remote side of the link is a Cisco ASA-5505 and at the main office there is a Cisco ASA-5510. The link is connected between these 2 devices and the routing is handled in the 5510. Thanks, Michael

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• Puppet Decentralized Setup

  - by paul.tw

  I want to migrate my existing Puppet setup from master/client to a decentralized solution. I know other solutions, such as Ansible are easier to setup for that purpose, but I really want to stay with Puppet. I found "supply_drop"(https://github.com/pitluga/supply_drop) on github, so I followed the instructions and did the following: rvm gemset create testing rvm use 1.9.3@testing gem install supply_drop The output is the following: [m@ms-MacBook-Pro:~ $ irb 1.9.3-p547 :001 require 'supply_drop' NameError: uninitialized constant Capistrano from /Users/m/.rvm/gems/ruby-1.9.3-p547@testing/gems/supply_drop-0.17.0/lib/supply_drop/tasks.rb:1:in `' from /Users/m/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:55:in `require' from /Users/m/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:55:in `require' from /Users/m/.rvm/gems/ruby-1.9.3-p547@testing/gems/supply_drop-0.17.0/lib/supply_drop.rb:10:in `' from /Users/m/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:135:in `require' from /Users/m/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:135:in `rescue in require' from /Users/m/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:144:in `require' from (irb):1 from /Users/m/.rvm/rubies/ruby-1.9.3-p547/bin/irb:12:in `' Since that doesn't work without problems, I was wondering which alternatives are there available to do the same. Do you have any suggestings?

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• Running IIS command on remote server via Powershell

  - by Paul Hunt

  I am trying to check if an IIS application pool exists on a remote server using a PowerShell script. The command I am running is: test-path "IIS:\AppPools\DefaultAppPool" If I run this script directly on the IIS server in question I get a response back of "True" so this tells me that I have IIS management correctly configure in PowerShell. However when I run the following script from a remote server I get a response of "False" invoke-command -ComputerName IISSERVER -ScriptBlock { test-path "IIS:\AppPools\DefaultAppPool" } I know that PowerShell remoting is correctly configured because I can run the following command and get a list of files invoke-command -ComputerName IISSERVER -ScriptBlock { get-childitems "c:\" } So why am I getting the wrong response about the existence of the application pool?

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• Strange behavior in networking between 64bit and 32bit

  - by Rob

  I'm having a strange behavior about my network setup. I have 2 laptops, one (Lenovo) with Windows 7 Professional 64-bit and another (Acer) with Windows 7 Ultimate 32-bit and a wireless router. I'm connecting these 2 using the router but with a strange behavior. I can ping both machines, as well as the router, but when i try to access their shared folders (\\computer_name\shared_folder) the connection starts to fail and I need to reboot both machines to get it working again. But this only happens sometimes, sometimes it works.

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• How can I prevent Firefox from storing a 10 MB places database file in my Windows roaming profile?

  - by Paul D. Waite

  On my work PC, Firefox stores a 10 MB file called places.sqlite in my roaming profile: C:\Users\MY_USERNAME\AppData\Roaming\Mozilla\Firefox\Profiles\PROFILE_ID\places.sqlite I don't use any location-related features in Firefox, and this file causes my roaming profile to be larger than my company allows (25 MB), meaning I get warnings about my profile size every day. Can I stop Firefox storing this file in my roaming profile?

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• unwanted password prompt pops up on web server?

  - by Paul

  my web server randomly asks for a password as though basic authentication is turned on. It's an IIS 7 web server and you have to specifically install basic authentication in the roles section. It isn't installed. The message that pops up is "Warning: This server is requesting that your username and password be sent in an insecure manner (basic authentication without a secure connection)" I cannot reproduce the problem but a number of customers have reported the problem and it only seems to appear to a small number of customers. It pops up when they visit the homepage, nothing is generated by the IIS logs to indicate a password box is being served (e.g. no 401 errors etc) Can anyone offer any advice? Thanks

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