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Articles indexed in January 2011

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• Guaranteed way to force application running continuously (overriding taskkill, task manager etc.)

  - by Alex

  I have a C# security/monitoring application that I need to have running no matter what. However, I can not remove privileges or restrict access to parts of the OS (Windows). I thought of having a protection service running which monitors continuously if an application is running, and starts it back up when the application is killed somehow, while the application monitors the protection service and starts the service if the service is killed. To my knowledge you can't simultaneously kill multiple processes at the same time. Any better idea to guarantee that an application is always running?

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• C# Unit Testing: How do I set a Lazy<T>.ValueCreated to false?

  - by michael paul

  Basically, I have a unit test that gets a singleton instance of a class. Some of my tests required me to mock this singleton, so when I do Foo.Instance I get a different type of instance. The problem is that my checks are passing individually, but failing overall because one test is interfering with another. I tried to do a TestCleanup where I set: Foo_Accessor._instance = null; but that didn't work. What I really need is Foo_Accessor._instance.IsValueCreated = false; (_instance is a Lazy). Any way to unset the Lazy object that I didn't think of?

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• Fluid width Son of Suckerfish dropdown menus

  - by derekerdmann

  For CSS dropdown menus, I usually stick with the Son of Suckerfish dropdowns. The technique works extremely well, but there's one small thing that's always bothered me: the width of the dropdown links is always fixed. Are there any ways to automatically resize the width of the items in a Suckerfish dropdown menu? If not, are there any other CSS-based dropdown menu strategies that can accomplish this?

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• My dropdownlist is not selecting an item as expected (MVC 1)

  - by Jen

  OK so I have 2 pages where this kind of behaviour is implemented. It works on one but doesn't work in another and I have no idea why. Despite the data containing a list of selectitems and one of them is selected the dropdown list is not displaying this selection (ie. it resets to the blank item). I don't know how to further debug this. In my page: <%= Html.DropDownList("CampusId", ViewData.Model.Campuses, new { @class = "large search_box" })%> In my controller. Campuses = AdminRepository .ListAll<Campus>(a => a.Description) .ToSelectListItem<Campus>(a => a.CampusId, a => a.Description, criteria.CampusId, true); I can see that campuses does have the correct list item marked as selected - so why when it is displayed on the page is it no longer marked as selected?! I can't see anything else obviously modifying the list. Thanks :)

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• can't define id ( cold fusion )

  - by venom

  here is my cold fusion code: Example1: <cfquery name="GET_BRAND" datasource="#dsn1#"> SELECT PRODUCT_CATID FROM PRODUCT_CAT WHERE PRODUCT_CATID = PRODUCT_CATID </cfquery> #get_brand.product_catid# But it shows all the time number 1, i just can't understand why, and how do i make it work properly, this code should have defined the brand_id, but instead shows 1. The system is Workcube. Here is my example for getting from the static product's id, its dynamic price: Example 2: <cfset product_id = 630> <cfquery name="price_standart" datasource="#dsn3#"> SELECT PRICE_STANDART.PRICE PRICE FROM PRICE_STANDART WHERE PRICE_STANDART.PRODUCT_ID = <cfqueryparam value="#product_id#" cfsqltype="cf_sql_integer"> </cfquery> But this time i need to get from dynamic product's ID its dynamic brand id. This script works the same way as the Example 1: <cfquery name="GET_BRAND" datasource="#dsn1#"> SELECT BRAND_ID FROM PRODUCT_BRANDS WHERE BRAND_ID = BRAND_ID </cfquery> #get_brand.BRAND_ID#

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• Generic IEqualityComparer

  - by Nettuce

  A generic equality comparer that takes a property expression or a comparison Func public class GenericComparer<T> : IEqualityComparer<T> where T : class         {             private readonly Func<T, T, bool> comparerExpression;             private readonly string propertyName;             public GenericComparer(Func<T, T, bool> comparerExpression)             {                 this.comparerExpression = comparerExpression;             }             public GenericComparer(Expression<Func<T, object>> propertyExpression)             {                 propertyName = (propertyExpression.Body is UnaryExpression ? (MemberExpression)((UnaryExpression)propertyExpression.Body).Operand : (MemberExpression)propertyExpression.Body).Member.Name;             }             public bool Equals(T x, T y)             {                 return comparerExpression == null ? x.GetType().GetProperty(propertyName).GetValue(x, null).Equals(y.GetType().GetProperty(propertyName).GetValue(y, null)) : comparerExpression.Invoke(x, y);             }             public int GetHashCode(T obj)             {                 return obj.ToString().GetHashCode();             }         }

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• Unable to SSH to EC2

  - by Walker

  I downloaded the cert-xxx.pem and pk-xxx.pem files and also the keypair.pem and moved it all to the /.ssh folder on my Ubuntu client machine. this is what I get when I try to SSH with -v at the end debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Trying private key: /root/.ssh/identity debug1: Trying private key: /root/.ssh/id_rsa debug1: Trying private key: /root/.ssh/id_dsa debug1: No more authentication methods to try. Permission denied (publickey). I am new to administering servers and I want to know if I should be trying to convert the pem files to id_rsa and id_dsa. I am not really sure if that is possible but I don't know how else to get the id_rsa, id_dsa from those pem files or if there is any work around. I managed to get access to EC2 the first time and this is my second try and I am unsuccessful so far. Any help is appreciated. regards Walker

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• Logrotate Successful, original file goes back to original size

  - by drewrockshard

  Has anyone had any issues with logrotate before that causes a log file to get rotated and then go back to the same size it originally was? Here's my findings: Logrotate Script: /var/log/mylogfile.log { rotate 7 daily compress olddir /log_archives missingok notifempty copytruncate } Verbose Output of Logrotate: copying /var/log/mylogfile.log to /log_archives/mylogfile.log.1 truncating /var/log/mylogfile.log compressing log with: /bin/gzip removing old log /log_archives/mylogfile.log.8.gz Log file after truncate happens [root@server ~]# ls -lh /var/log/mylogfile.log -rw-rw-r-- 1 part1 part1 0 Jan 11 17:32 /var/log/mylogfile.log Literally Seconds Later: [root@server ~]# ls -lh /var/log/mylogfile.log -rw-rw-r-- 1 part1 part1 3.5G Jan 11 17:32 /var/log/mylogfile.log RHEL Version: [root@server ~]# cat /etc/redhat-release Red Hat Enterprise Linux ES release 4 (Nahant Update 4) Logrotate Version: [root@DAA21529WWW370 ~]# rpm -qa | grep logrotate logrotate-3.7.1-10.RHEL4 Few Notes: Service can't be restarted on the fly, so that's why I'm using copytruncate Logs are rotating every night, according to the olddir directory having log files in it from each night.

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• What is a fairly accepted endpoints to concurrent calls ratio for a PBX?

  - by Logan Bibby

  Hey guys! Not too positive about the relevance of this question to Server Fault, but I'll let you guys poke around at it anyway. :) I'm trying to figure out what an accepted ratio of endpoints to concurrent calls on the "average" office PBX. I'm defining concurrent calls as any call being placed, including internal calls. I'm not going to be considering call centers into this ratio, I'll be looking at those differently, anyway. To give you guys a little history behind the question: I need this ratio to be able to figure out decent specs for a virtual PBX service I'm going to be rolling out within the upcoming months. The ratio will determine the number of trunks needed per PBX system. -- Logan

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• How to confirm memcache memory increase?

  - by Peter Johansson

  Alright, I have downloaded /etc/sysconfig/memcache And edited the file that contained "PORT="11211" USER="memcached" MAXCONN="1024" CACHESIZE="64" OPTIONS="" to 1000 cachesize. I uploaded the file back to the server. Now I know there is a way to check if the changes took effect, but I cant remember how. I tried "memcached-tool 127.0.0.1:11211 stats" but it didnt show me the RAM size. Any help would be appreciated.

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• Update BIOS on Sun Fire X4150 server

  - by Massimo

  I have some Sun Fire X4150 servers with a very old BIOS release (1ADQW015), which seems to have some compatibility problems with WMware ESX Server 3.5 and Windows 2008 R2 virtual machines; so I want to update the BIOS on them. The problem: according to this page, if your servers run ELOM (mine do), you first need to update to the latest ELOM release, then to the interim transition release, then finally you can update to the latest one. Ok, I'm willing to do that... but it looks like Sun (now Oracle) will happily let you download the latest firmware DVD (3.3.0), but it will not let you download the transition release (2.0) if you don't have a support contract. Well, I actuall don't care at all about the servers' management controllers (we don't even use them), so upgrading from ELOM to ILOM is totally irrelevant to me; but I need to update the servers' BIOS. So my question is: can I update the servers' BIOS to the latest version without doing the full ELOM-to-ILOM migration, or will this not work (or even make the servers unusable)? Do BIOS versions and SP ones need to be matched, or can one be updated without bothering with the other? Bonus question: if this whole ELOM-to-ILOM thing actually is needed in order to update the BIOS, can that 2.0 CD-ROM be obtained without having a support contract with Sun/Oracle (which we are definitely not going to sign, being that quite old hardware)? Update: I tried upgrading only the BIOS on one of the servers, and it didn't boot anymore. So it really looks like a full firmware upgrade is needed, and the management controller and BIOS versions should be kept in sync. So... where can I find that *&!£%$% 2.0 CD-ROM? Or at least the transition firmware that can be found on it?

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• IIS Digest repeatedly asking for authentication

  - by David Budiac

  I have a development copy of an ASP.NET intranet site checked out and running on my local machine. We're using digest authentication to allow users to log in using their active directory accounts. On my development copy only, Digest sometimes will repeatedly prompt for login information usually ~9 times per page request. After repeatedly logging in (or it also works to cancel out of 8 out of the 9 prompts), I can use the site as normal. I cannot pinpoint what is triggering the issue. Sometimes this problem triggers upon the next page request, sometimes after I edited/saved/refreshed a page, and sometimes it doesn't happen at all. Each prompt triggers several logon (Event ID 4624 & 4672) security events in the Events Viewer. Shortly after each burst of logon events, I'll see a burst of logoff events (Event ID A co-worker who has a nearly an identical setup (Windows 7, IIS 7) is not experiencing the issue. Our production copy (that is running on a different server) also does not experience the issue. We've tried to compare our settings in IIS, not really finding any differences. I'm using chrome but I've experienced the issue in other browsers.

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• Apache CPU usage stays at 100% even when there are no requests

  - by Leirith

  Hi, I've been running the Apache HTTP server benchmarking tool (ab) on my new Apache server to test performance. I noticed that with a command like the following: ab -n 100000 -c 1000 http://www.mysite.com/ The CPU is used 100% by the apache2 processes during the testing. When the test concludes, usually with the following error just before the last requests are made: apr_poll: The timeout specified has expired (70007) Total of 99960 requests completed the CPU usage remains at 100%, and it's all being consumed by apache. I am using the worker MPM with and running PHP with mod_fcgid. Any advice as to why this is or what can be done to stop it would be appreciated.

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• Best FFDShow settings for upscaling SD content to 1080p HD?

  - by Richard

  Hi there, I'm running Windows Media Center 7 with ffdshow-tryouts for the decoding of many of the popular video formats. It works great. I've now upgraded my television from SD to 1080p HD and, naturally, I've still got a large number of existing MP4/XviD/DivX items of content which is in SD. I'd like, therefore, to modify the settings of ffdshow so that they are upscaled to 1080p as best as possible. I appreciate that they won't be as good as their HD equivalent - but on the flip side, I'm pretty certain I can do more than just resizing the picture to get the best possible output. Can anyone recommend the best settings in ffdshow to do this? For example, should I apply a sharpen mask? Or Noise Reduction? Or Deinterlace? Alternatively, would it be better to keep them at their current resolution and let the TV (Samsung Series 5 LE32C580) do the upscaling? Thanks.

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• How to allow password protected start-stop-daemon functionality?

  - by Mahmoud Abdelkader

  I would like to use Ubuntu's start-stop-daemon to start my application, but the application protects some sensitive information, so I have a mechanism where the application prompts for a password that's then used to generate a hashkey, which is used as the secret key for a symmetric encryption (AES) to encrypt and decrypt things from a database. I'd like to daemonize this application and have it run from start-stop-daemon, so that sudo service appname stop and sudo service appname start would work, but, I'm not sure how to go about doing this with the added complexity of a password prompt. Is there something that supports this or do I have to program it from scratch? I figured I should ask first before re-inventing the wheel. Thanks in advance.

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• Easy text re-wrapping

  - by AmV

  I'm looking for a tool that allows me to easily re-wrap text (i.e. remove line breaks, but not paragraph breaks from a text selection or a text field), and that works in my browser (Chrome) and on Windows. Bonus points for anything that works outside the browser, and that works in-place (i.e. that doesn't require copy-pasting the text through a separate window or using something like http://www.textfixer.com/tools/remove-line-breaks.php) Browser extensions, GreaseMonkey scripts or applications that also work on Linux and/or Mac (or even better, that are multi-platform) are all welcomed. Here is an example of how the tool should behave. If I have the following in a text field: This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com I'd like to be able to, for example, select the text, and, with a keyboard shortcut, convert it to: This is a test for SuperUser.com. This is a test for SuperUser.com. This a test for SuperUser.com. This is a test for SuperUser.com This is a test for SuperUser.com. This is a test for SuperUser.com. This a test for SuperUser.com. This is a test for SuperUser.com Thanks in advance!

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• Windows 7 Media Center: sometimes no sound on a TV channel

  - by torbengb

  Problem Sometimes, recorded TV shows have no sound. This is of course very annoying because the recorded show is worthless. Also, when switching channels while watching live TV, sometimes a channel has no sound. This is always solved by switching channel again and then back (most often, once will do the trick). Media Center doesn't do this trick by itself when recording of course, so that's the bigger issue - but the cause is certainly the same. Details The computer is running a newly installed Windows 7 and Windows Media Center. It has 2 different tuner-cards installed. Both are installed with signed and up-to-date Win7 drivers and appear OK in Device Manager. Both tuners get the same antenna signal, from a split cable from the wall. The cable delivers analog cable TV (40+ channels) and digital cable TV (4 channels) at the same time. Both tuners have been configured to receive both analog and digital channels. This only happens with analog channels. How can I fix the no-sound problem? Update: I've now spent some time with the computer to try and pinpoint the problem, but I've had little success so far: I flipped through the channels until one didn't have sound, then I disconnected the antenna cable from one of the tuners. It was the right one because then the video also went away. I flipped lots more channels to see if the other card also would come up mute once but I never had a channel without sound. It might still be possible, I don't know. Then I disconnected the "good" tuner and connected the "bad" tuner and again flipped lots of channels but again I never had a channel without sound. It seems to me that the problem is erratic. It happens on any channel, and I haven't ruled out yet that it only happens on one tuner.

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• Linux on HP Envy

  - by Oscar Godson

  OK, the Ubuntu forums aren't helping and I thought maybe you guys here could help. First off, does anyone know the best flavor of Linux to use on an HP Envy? what has the best support out of the box? If not, does anyone know how the hell to get the following to work on Ubuntu 10.04: The touchpad to work at all? Right now, right clicking doesnt work at at all, and left clicks dont work while you have another finger on the pad at all. It jumps all over. ALSO, the multi-touch isn't clickable, but it's for sure a multi-touch touchpad. Works in W7 and can do things like a MBP in W7 The computer feels like it's on fire... i think im missing some driver. Seems odd that the random meta keys like calc, email, brightness, right click, etc work, but not the touchpad? The video card seems fine, but i haven't tested compiz fully yet... Thanks so much to anyone who helps. i want to get back to linux after a couple years on Mac. :)

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• Process does ICMP port scan on my OSX box and I am afraid my Mac got a virus

  - by Jamgold

  I noticed that my 10.6.6 box has some process sending out ICMP messages to "random" hosts, which concerns me a lot. when doing a tcpdump icmp I see a lot of the following 15:41:14.738328 IP macpro > bzq-109-66-184-49.red.bezeqint.net: ICMP macpro udp port websm unreachable, length 36 15:41:15.110381 IP macpro > 99-110-211-191.lightspeed.sntcca.sbcglobal.net: ICMP macpro udp port 54045 unreachable, length 36 15:41:23.458831 IP macpro > 188.122.242.115: ICMP macpro udp port websm unreachable, length 36 15:41:23.638731 IP macpro > 61.85-200-21.bkkb.no: ICMP macpro udp port websm unreachable, length 36 15:41:27.329981 IP macpro > c-98-234-88-192.hsd1.ca.comcast.net: ICMP macpro udp port 54045 unreachable, length 36 15:41:29.349586 IP macpro > c-98-234-88-192.hsd1.ca.comcast.net: ICMP macpro udp port 54045 unreachable, length 36 I got suspicious when my router notified me about a lot of ICMP messages that don't get a response [INFO] Mon Jan 10 16:31:47 2011 Blocked outgoing ICMP packet (ICMP type 3) from 192.168.1.189 to 212.25.57.90 Does anyone know how to trace which process (or worse kernel module) might be responsible for this? I rebooted and logged in with a virgin user account and tcpdump showed the same results. Any dtrace magic welcome.

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• Installing Ruby on Rails on Ubuntu 10.04: A Living Nightmare

  - by emptyset

  Update #3: Starting over from scratch, shortened this post, decided to re-install a clean copy of Ubuntu 10.04 on a VM and go through the walk-through again. So, all the steps go without a hitch. As root: root@ubuntu:~/rubygems-1.3.7# ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] root@ubuntu:~/rubygems-1.3.7# gem -v 1.3.7 root@ubuntu:~/rubygems-1.3.7# rails -v Rails 2.3.8 Now, as myself (in a separate term): emptyset@ubuntu:~$ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] emptyset@ubuntu:~$ gem -v /usr/local/lib/site_ruby/1.8/rubygems.rb:10:in `require': no such file to load -- rubygems/defaults (LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:10 from /usr/local/bin/gem:8:in `require' from /usr/local/bin/gem:8 emptyset@ubuntu:~$ rails -v bash: /usr/bin/rails: Permission denied So, this appears to be a permissions issue, but I don't understand why. Specifically, if I have to start making things go+rx all over the place, I really need to understand which specific files need the permissions change.

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• How to make an x.509 certificate from a PEM one?

  - by Ken

  I'm trying to test a script, locally, which involves uploading a file using a Java-based program to a FileZilla FTPES server. For the real thing, there is a real certificate on the FZ server, and the upload step (tested alone) seems to work fine. I've installed FileZilla Server on my dev box (so it'll test uploading from localhost to localhost). I don't have a real certificate for it, of course, so I used the "Generate new certificate..." button in FZ. It works fine from an interactive FTPES program (as long as I OK the unknown cert), but from my Java program it throws a javax.net.ssl.SSLHandshakeException ("unable to find valid certification path to requested target"). So how do I tell Java that this certificate is OK with me? (I know there's a way to change the Java program to accept any certificate, but I don't want to go down that route. I want to test it just as it will happen in production, and I don't want to ignore unknown certificates in production.) I found that Java has a program called "keytool" that seems to be for managing this sort of thing, but it complains that the certificate file that FZ generated is not an "x.509" file. A posting from the FZ side said it was "PEM encoded". I have "openssl" here, which looks like it's perfect for converting between certificate formats, but I think my understanding of certificate formats is wrong because I'm not seeing anything obvious. My knowledge of security certificates is a bit shaky, so if my title is stupidly wrong, please help by fixing that. :-)

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• Firefox 3.6/4: modify/ tweak spell-check dictionary?

  - by studiohack

  I edit frequently on Super User, and it is a pain to edit for capitalization or words that are shortened, i.e. Win7 instead of Windows 7, or windows versus Windows. Using Firefox 3.6 and/or 4, Is there a way (using an extension or configure settings) I can configure the dictionary to automatically recognize words that may not be capitalized or are shortened (while editing a post)? Say, have the dictionary see Win7 and underline it so that I can right-click on it, and select Windows 7? I would want it to be configurable, so I can tell it what to look for, etc... Ideas or recommendations?

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• Remote Desktop via VPN from Mac to Windows Vista

  - by Vegar

  I have some problems connecting to my office from home. I'm getting the following error message: Remote Desktop Connection cannot verify the identity of the computer that you want to connect to. Try reconnecting to the Windows-based computer, or contact our administrator. I have downloaded CoRD, and for some reason, that works okay. I can also connect from a Windows 7 running on VMWare Fusion. On Windows 7, I use SonicWall Global VPN Client, and on the Mac, I use VPN tracker, if that is related... What's going on?

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• Java Error Code 2753 Regutils.dll

  - by Adam

  Hello, I'm trying to install Java's JRE, however I'm running into problems. Recently the JRE was uninstalled on this computer, and when I try to reinstall I get this error 2753. I've looked online and the best page I've found to try and help is this one: http://forums.majorgeeks.com/showthread.php?t=182720 Which says to uninstall Java using Revo or Windows Cleanup. However nether program says I have Java installed. From what I've read this is a uninstall problem when Java is not really uninstalled. How do I make sure Java is completely uninstalled? Do you have any other suggestions for me to try?

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• Free Webinar Featuring Oracle Spatial and MapViewer, Oracle Business Intelligence, and Oracle Utilities

  - by stephen.garth

  Maps, BI and Network Management: Together At Last Date: Thursday, January 20 | Time: 11:00 a.m. PDT | 2:00 p.m. EDT | Duration: 1 hour Cost: FREE For years, utilities have wrestled with the challenge of providing executive management and other decision makers with maps and business intelligence during outages without compromising the performance of their real-time network operations and control systems. Join experts from Directions Media, Oracle and ThinkHuddle in this webinar for a discussion on how Oracle has addressed this challenge by incorporating Oracle Spatial data and the dashboard capabilities of Oracle Business Intelligence into a new application, Oracle Utilities Advanced Spatial Outage Analytics. Jim Steiner, Vice President of Spatial Product Management at Oracle, will provide an overview of Oracle's spatial and location technology, including Oracle Spatial 11g and Oracle Fusion Middleware MapViewer, and describe how Oracle is using this technology to spatially-enable many of its own enterprise applications. Brad Williams, Vice President of Oracle Utilities, will describe why and how the company developed Oracle Utilities Advanced Spatial Outage Analytics, how it works with Oracle Utilities Network Management System, and how this can deliver improved decision support and operational benefits to utilities. Steve Pierce, Spatial Systems Consultant with ThinkHuddle, will discuss architectural aspects and best practices in the integration of Oracle's spatial and BI technology. Following the presentation, attendees will have an opportunity to engage the panelists in a live Q&A session. Who Should Attend Executives, decision makers and analysts from IT, customer service, operations, engineering and marketing - especially in utilities, but also any business where location is important. Don't miss this webinar - Register Now. Find out more: Oracle Spatial on oracle.com More technical information on Oracle Technology Network Information on Oracle Utilities applications var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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