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• Why might apache2 use 100% of CPU at startup?

  - by QuantumMechanic

  This is apache 2.2.14 on SLES9. Out of nowhere (i.e. it had been working fine for ages) I am seeing apache2 suddenly start using 100% of the CPU at startup, and never completing startup. Nothing is getting written to /var/log/error_log (when it did back when things were OK). ps only shows the main httpd process and not any of the spawned threads. When things were OK, it would show the spawned threads. So it appears httpd is going into some sort of infinite loop right at startup and isn't even completing startup. It's not an issue of being overloaded by connections -- this happens even when nothing is trying to contact it. The config files haven't changed (or at least they haven't changed in a way that changed their last-modified time). I've tried added -e debug -E /var/log/apache2/startup_info to the command line, but nothing is put in the file. Any ideas what could be happening?

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• Some Mac applications crash frequently, with "__THE_SYSTEM_HAS_NO_PORT_SETS_AVAILABLE__" in backtrace

  - by smokris

  Recently I'm finding that some Mac OS X applications are crashing frequently with backtraces like the following: Process: Mail [39226] Path: /Applications/Mail.app/Contents/MacOS/Mail Identifier: com.apple.mail Version: 4.4 (1082) Build Info: Mail-10820000~1 Code Type: X86-64 (Native) Parent Process: launchd [338] Date/Time: 2011-01-12 21:59:48.383 -0500 OS Version: Mac OS X 10.6.6 (10J567) Report Version: 6 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000002, 0x0000000000000000 Crashed Thread: 12 Dispatch queue: com.apple.root.default-priority [...] Thread 12 Crashed: Dispatch queue: com.apple.root.default-priority 0 com.apple.CoreFoundation 0x00007fff81653975 __THE_SYSTEM_HAS_NO_PORT_SETS_AVAILABLE__ + 5 1 com.apple.CoreFoundation 0x00007fff815a1f69 __CFRunLoopFindMode + 553 2 com.apple.CoreFoundation 0x00007fff815a1c5d __CFRunLoopCreate + 317 3 com.apple.CoreFoundation 0x00007fff815a1a78 _CFRunLoopGet0 + 744 4 com.apple.CoreFoundation 0x00007fff815dc90a CFRunLoopRunInMode + 58 5 com.apple.MessageFramework 0x00007fff81d01183 +[NSRunLoop(MessageExtensions) _flushQueuedEventsAddingSource:] + 120 6 com.apple.MessageFramework 0x00007fff81d010d2 +[NSRunLoop(MessageExtensions) flushQueuedEvents] + 36 7 com.apple.MessageFramework 0x00007fff81ce6515 -[_MFInvocationOperation main] + 275 8 com.apple.Foundation 0x00007fff83921de4 -[__NSOperationInternal start] + 681 9 com.apple.Foundation 0x00007fff83a00beb __doStart2 + 97 10 libSystem.B.dylib 0x00007fff801402c4 _dispatch_call_block_and_release + 15 11 libSystem.B.dylib 0x00007fff8011e831 _dispatch_worker_thread2 + 239 12 libSystem.B.dylib 0x00007fff8011e168 _pthread_wqthread + 353 13 libSystem.B.dylib 0x00007fff8011e005 start_wqthread + 13 [...] Any ideas about what might be causing this and/or how to remedy it?

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• How to fix monitor detection on Windows 7?

  - by Boaz

  Hi, I'm using Windows 7 + Windows Media Center for my HTPC. It works great except from one annoying issue. Whenever I turn off my TV while listening the music, the music stop for a second or while Windows 7 tries to figure out what monitor is attached. After that second it settles down on a default 800x640. While not a big deal, it is annoying as I don't want to have the TV on while playing music. Is there anyway to fix the monitor/disable monitor auto-detection on Windows 7 so it would not start recalibrating everything when I turn off my TV? Thanks, Boaz

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• Creating a filesystem on a file in linux for software development purposes

  - by David

  This question originally start at Superuser.com http://superuser.com/questions/130032/available-filesystems-for-linux-that-are-case-insensitive Summary: My client has a PHP web application that was written and is served from a Windows environments. Unfortunately the past developer didn't obey naming conventions so file includes are of the form "/file/At/SomethingHere.php" when on disk the path is actually "/File/at/Somethinghere.php". I do not want to use Windows for development but the filesystems I use (ext2, ext3 ) are case sensitive. I think the solution will be to create a filesystem like FAT 32 or similar, but I am somewhat clueless how to accomplish that. Starting to read up on DD and fdisk to figure out if those are the correct tools I will need.

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• How do I expose a webapp on :8090, even though firewall allows only :80 and :22

  - by Kaustubh P

  I am a noob in Server related stuff, so bear me. I use amazon webservices (EC2) on which I have a webapp running on jetty, which runs on port 8090. I deploy the webapp through the usual method of java -jar start.jar So then to access the app, I have to add a port in the URL, like this: someIP:8090/app But just typing someIP in the browser takes me to a page that shows It works! This is the default web page for this server. The web server software is running but no content has been added, yet. which I assume is apache. I have apache, tomcat and jetty installed. What can I do so that I dont have to specify the port? Do I have to perform port-forwarding? Thanks a lot.

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• Parallels 5: upgrade from Vista to Win 7: annoying deadlock

  - by nobody

  What I have: Parallels 5, Vista installed. Trying to upgrade to Win 7. I have the Win7 .iso mounted as a DVD to my virtual machine. When I start the machine from this DVD, and attempt the upgrade, I'm told (paraphrased) "You booted from DVD. Don't do this. Reboot, then insert the DVD, commence the upgrade from there." But when I try that, the upgrade keeps failing because "There is not enough disk space". I've proven this is a red herring of an error message; the real problem is the installer can't find -any- disk drives. When I instead choose the "Advanced" install, and I am prompted to choose the disk drive, there aren't any to choose from. How do unblock this deadlock?

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• My Macbook Pro doesn't give any reaction when pressing the power button

  - by Juri

  An hour ago I closed the display my Macbook Pro. it goes into sleep mode. After dinner I returned, opened the display and wanted to continue with my work, but I recognized it was switched off completely. I tried to press the power button and received nothing. I also noticed that the green light on the power supply plug which is plugged into my Macbook is off. Same thing with a power supply from the Mac of a friend of mine. What could I try? Some suggestions? What could be the problem here?? I already tried using the battery to start, no success, also taking the battery out completely, no success. Even if I press the small button for showing the current battery charge, none of the leds starts. It's like the Mac is completely dead.

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• IP telephony open source systems

  - by danke

  I'm trying to pick an IP telephony technology to learn. I heard of Asterisk, trixbox, freePBX, and my head was already spinning being not sure what to learn. Then I came across this article listing some more like Kamailio, Yate, CallWeaver, FreeSWITCH, SipXecs and now my head REALLY is spinning http://www.cio.com.au/article/323016/five_open_source_ip_telephony_projects_watch . Can someone give me a run down of how all these technologies tie together? What is the trend now, because I'd like to start learning. Note: Anyone please re-tag this question if you know better, because I'm new to this field and not sure about the best tags.

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• XSP2 hangs after some time

  - by Sebi

  I'm running a REST/JSON webservice (SVC) using xsp2 (and xsp2 through Apache/mod_mono). After some hours, the service just hangs and outputs a timeout after about 5 minutes. This can only be solved by restarting xsp2. Sometimes multiple restarts are needed to get it running again. I've made a small sample webservice simply returning a "pong". The example is available in the bug report: https://bugzilla.novell.com/show_bug.cgi?id=608158 The bug can sometimes be reproduced following these steps: Steps to Reproduce: 1. start xsp2 (webservice) 2. request http://[server]/WSPing.svc/ping Actual Results: After some time, I always get timeouts. I'm running a gentoo linux as a XEN DomU and i'm using Visual Studio to build and publish the service. Any hints???

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• How can I quickly change display settings from dual monitor to single monitor on laptop?

  - by Daren Thomas

  I have my laptop (running Windows XP SP3) at work hooked up to an external monitor. Whenever I unplug the external monitor (time to go home!) I have to manually change the display settings. This takes time and involves a lot of clicks. Is there a way to automate changing these settings? I'm thinking of a hotkey solution or a little application that I can start with Launchy to toggle between two profiles. I use the MultiMon tool for "extending" the taskbar to the second monitor - will I have to give that up?

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• Problem opening XWindows programs with xming and SSH Secure Shell

  - by Brian

  I've installed SSH Secure Shell and xming on my laptop running Windows 7 (64-bit). I'm having trouble starting X Windows applications from the SSH console. I've been able to do it in the past. I've pretty much determined that it's not a server issue because I've tried it on two different servers (both servers are running RHEL 5). Running "echo $DISPLAY" on either server gave me "localhost:10.0". My XLaunch configuration settings are: Multiple Windows, 10 (display number), and Start no client. Once xming has launched, I'll try to execute something like "firefox" and I get this back: The application 'firefox' lost its connection to the display localhost:10.0; most likely the X server was shut down or you killed/destroyed the application. I've already checked to make sure that the X server is running and it is: root 12579 2689 0 Feb14 tty7 00:04:23 /usr/bin/Xorg :0 -br -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7 Additionally, X11 Tunneling has been enabled in SSH as well as SSH 2 connections.

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• Firefox 4 refreshes all tabs although no internet connection exists

  - by Maxim

  I have a problem since I updated to Firefox 4. With Firefox 3.x I could start it without a internet connection and almost all of my open tabs were still loaded. With this I was able to read my open sites in the train where I have no internet connection. This does not work in Firefox 4. If I launch Firefox 4 I see all my open tabs but the content is not available. It seems that the new version tries to refresh all tabs on startup. Is there a possibility to disable this behaviour? Thanks in advance. Regards Maxim

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• Aperture and networked drive: thinks images are offline

  - by AK

  I keep my photos on a networked drive (wireless), and they are referenced by Aperture. Aperture seems to not try very hard to look for this drive. Usually I have to open the network drive in Finder before opening Aperture -- otherwise it doesn't find the images and considers them offline. To me this seems like Aperture isn't willing to look on the network for the drive, unless it was helped along by pointing it out in Finder. It doesn't work if I start Aperture first and then navigate to the drive in Finder. What are some workarounds to making this functional? Is there a way to tell Aperture to look again without restarting the program?

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• Failed to import SLES11 to SCOM2012

  - by siyang

  I try to the import my SLES11 to SCOM 2012, but failed. Below is my simple steps and failed error message. Import SLES11 mp DNS resolve both SCOM and SLES11 Install SCOM Agent and cert. Generated the cert from SLES11 then import it to SCOM, and use scxcertconfig -sign to refresh the cert, and back it to SLES11.(I restart the scxadmin on SLES11, and reboot the SCOM ) 5. On SCOM try to find the SLES11, but failed. Below is the error message. *Message: Certificate signing was not successful. Detials: Standard Output: Failed to start child process '/etc/init.d/scx-cimd' errno=13RETURN CODE:1 Standard Error: Exception Message:*

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• django + wsgi + suexec + userdir + apache?

  - by Jayen

  I've got a django 1.1 website I want to run in wsgi (as that seems to be the recommended deployment on apache). I want it to run as the www user (apache is running as www-data). I would ideally like this to work out of http://hostname/~www/ (~www/public_html) as well as http://virtualhostname/. I also want this to work for other users who may later use wsgi. Can I make this happen? I've been staring at docs trying to figure where to start, but I'm having trouble combining userdir and wsgi to let me run ~xxx/public_html/index.wsgi as user xxx, for every user xxx.

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• What is the old AIX & RS/6000 console font?

  - by Xepoch

  I'm sick of Lucida Console font on my putty sessions. I used to love whatever font was employed on IBM rs/6000 consoles. Does anyone know the name of that font and if it is available (and usable) from anywhere? Sorry, I need to clarify the "consoles" to which I refer were not the serial consoles but rather smaller stand-alone X-Window systems. They could be setup without XDM and would start in text screen. I'm searching like crazy to find the actual machines I remember (there were hundreds of them at Uni) but I don't have the IBM #s in front of me. It looked amazingly similar to the PS/2 like this:

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• Web Application Vulnerability Scanner suggestions?

  - by Chris_K

  I'm looking for a new tool for the ol' admin toolkit and would value some suggestions. I would like to do some "automated" testing of handful of websites for XSS (cross site scripting) vulns, along with checking for SQL injection opportunities. I realize that an automated tool approach isn't necessarily the only or best solution, but I'm hoping it would give me a nice start. The sites I need to scan cover the range in stacks from PHP / MySQL to Coldfusion, with some classic ASP and ASP.NET mixed in for good measure. What tools would you use to scan for Web application vulns? (Please note I'm focusing on the web apps directly, not the servers themselves).

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• Freezing with black screen after booting OS with AMD Catalyst driver

  - by Oleg

  I have ATI Mobility Radeon HD 5470 on my HP laptop. A few weeks ago I was confused with a weird trouble in proprietary drivers for my graphics card. When I start X server (or just boot Windows) system sometimes totally hangs up with black screen. The most annoying thing is that issue appearing is absolutely random (2 success, 3 fails, 1 success, 7 fails, etc.). It appears both on Linux (Arch, Debian 7) and Windows XP. I've tried reinstalling OS, drivers, etc. I've also tried updating BIOS. Then boot was successful for the next few times and issue appeared again (probably it was just a coincidence, because another BIOS updates gave no results). I really don't know what to do. Any ideas?

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• Httpd restart "Address already in use" error

  - by mtndesign

  I have an .rpm, which I created. In its %post part, I do some stuff, and in the end of this script, i call service httpd restart. It gives the following error: + service httpd restart Stopping httpd: [FAILED] Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:81 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:81 no listening sockets available, shutting down Unable to open logs [FAILED] I got this from the rpm verbose installing (-vv). So I know its about httpd restart itself, nothing else. The according to netstat only one process (httpd) is listening on port 81. $ sudo netstat -nlp | grep 81 tcp 0 0 :::81 :::* LISTEN 29670/httpd I don't understand, why running http FAILS at stop, and FAILS again in start. Any ideas how to solve this?

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• My PowerShell functions do not appear to be used

  - by Frank

  Hi there, I have a ps1 script in which I define 2 functions as such: function Invoke-Sql([string]$query) { Invoke-Sqlcmd -ServerInstance $Server -Database $DB -User $User -Password $Password -Query $query } function Get-Queued { Invoke-Sql "Select * From Comment where AwaitsModeration = 1" } I then call the ps1 file by typing it in (it's in a folder in the path, and autocompletion works) However, I cannot start using the functions. I am confused, because when I copy / paste the functions into the console, all is fine and they work. I also have a function defined in my profile, and it works. Where am I thinking wrong, why doesn't it work what I'm trying to do?

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• How to make PuTTY X11 forwarding work in a screen session?

  - by Alex Howell

  I'm using PuTTY with X11 forwarding enabled, using Xming as my X server on Windows 7. When I SSH to a Linux host, X11 forwarding works fine. If I start a "screen" screen manager session, it still works fine. If I disconnect from the screen session, then later resume in a different PuTTY window using "screen -rd", X11 forwarding doesn't work any more - I get an error: xterm X connection to localhost:11.0 broken (explicit kill or server shutdown). This seems to be because $DISPLAY is different in each PuTTY SSH session (localhost:11.0 in the first session, then localhost:12.0 in the next, and so on). If I manually set $DISPLAY to localhost:12.0 in the screen session, X11 forwarding works again. Is there a way to automatically set $DISPLAY in the screen session, each time it's resumed, so that it always matches the parent PuTTY session's?

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• Help creating image from LVM

  - by jackhab

  I need to duplicate CentOS hard drive image for multiple stations. The HD has the following layout: Disk /dev/sdb: 250GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 250GB 250GB primary lvm I saved /dev/sdb1 to file with fsarchiver but for sdb2 I get: /fsarchiver savefs an2.fsa /dev/sdb2 oper_save.c#1006,filesystem_mount_partition(): can't detect and mount filesystem of partition [/dev/sdb2], cannot continue. removed an2.fsa Although fsarchiver probe simple correctly detects sdb2 as LVM2_member. Is fsarchiver correct tool for this job? What's wrong? I'm on Ubuntu 9.1 with fsarchiver 0.6.8 and lvm tools installed. Thanks.

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• Help creating image from LVM

  - by jackhab

  I need to duplicate CentOS hard drive image for multiple stations. The HD has the following layout: Disk /dev/sdb: 250GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 250GB 250GB primary lvm I saved /dev/sdb1 to file with fsarchiver but for sdb2 I get: /fsarchiver savefs an2.fsa /dev/sdb2 oper_save.c#1006,filesystem_mount_partition(): can't detect and mount filesystem of partition [/dev/sdb2], cannot continue. removed an2.fsa Although fsarchiver probe simple correctly detects sdb2 as LVM2_member. Is fsarchiver correct tool for this job? What's wrong? I'm on Ubuntu 9.1 with fsarchiver 0.6.8 and lvm tools installed. Thanks.

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• Cannot connect to a 2008 sql server named instance hosted in a azure virtual machine

  - by emardini

  When I try to connect to a named instance in a SQL SERVER hosted in a azure VM I get this message: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1) The problem is the sql browser is not working properly, when I start the sql browser service it closes after a few seconds and the event log says "There are no instances of SQL Server or SQL Server Analysis Services." But I do have a named instance, I can connect locally to this instance. I've re-installed sql browser and the instance but ii does not work. The host is a azure virtual machine windows server 2008 datacenter. Please help. Thank you

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• How to automatically save sessions with multiple windows in FireFox

  - by Matthew Talbert

  I've used primarily FF's built-in session management until recently. Now my needs have become more sophisticated. What I want is to be able to have two windows, one with a fixed set of tabs (approximately 5) and the other with "automatic save". That is, when I start FF, I want 1 window to open with my 5 tabs, and another to open with whatever I had when I shut down FF. I've installed "Session Manager", but I can't seem to get it to do what I want. It will save one window, but when I close one window, it removes that one from the session. Any suggestions to do this with either Session Manager or another plugin would be great.

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