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• How To Perform Distributed Website Monitoring?

  - by cballou

  I would like to know how sites like the following perform distributed website monitoring (from multiple checkpoints/countries). pingdom.com, site24x7.com, uptrends.com, siteuptime.com, etc, etc. To be exact, what process would occur in checking if a given domain name went down? If the server finds that the site is down, what is the next step? Would it make a REST API request to a separate server to run the same test and report the results? I have a few theories, including: utilizing host(s) from different countries utilizing proxies from different countries I'm looking for the most proper or correct way to handle this, which can include the usage of servers from multiple countries/hosts.

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• How to find the /dev name of my USB device

  - by mustafa

  I am running Ubuntu 11 on VmWare on Windows XP. I want to format an SD card in Ubuntu. But, I can't figure out which /dev/xxx device the SD card is. I plug the card into the built-in socket of my laptop. I "safely remove" the device in Windows. Then, I "connect" the PCMCIA reader in VmWare. Now, I was supposing to see a new device like /dev/sdx. But, it doesn't appear :( How can I find what the name of my USB device's name and mount it? /var/log/message is empty. Here is the output of dmesg: [ 5268.927308] usb 2-1: new full speed USB device number 12 using uhci_hcd And, here is the last lines of /var/log/syslog: Oct 31 18:51:21 ubuntu kernel: [ 5268.927308] usb 2-1: new full speed USB device number 12 using uhci_hcd Oct 31 18:51:21 ubuntu mtp-probe: checking bus 2, device 12: "/sys/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1" Oct 31 18:51:21 ubuntu mtp-probe: bus: 2, device: 12 was not an MTP device

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• How to get Firefox Greasemonkey script to use a local cascading stylesheet?

  - by Umber Ferrule

  What's the correct syntax to link to a CSS file in the same directory as a Greasemonkey JavaScript? I've tried the following but it doesn't work: var cssNode = document.createElement('link'); cssNode.type = 'text/css'; cssNode.rel = 'stylesheet'; cssNode.href = 'example.css'; cssNode.media = 'screen'; cssNode.title = 'dynamicLoadedSheet'; document.getElementsByTagName("head")[0].appendChild(cssNode); If I can get this to work, it would be a lot easier than encasing CSS changes in JavaScript.

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• How to turn SSLCompression off in Apache 2.4.3?

  - by kumar

  I have installed Apache 2.4.3(OpenSSL 1.0.0j) on a machine and trying to do SSLCompression off in the ssl.conf file throws an error: Syntax error on line 219 of /etc/httpd/conf.d/ssl.conf: Invalid command 'SSLCompression', perhaps misspelled or defined by a module not included in the server configuration What could be wrong here? If it helps, I installed mod_ssl(2.4). Is that enough or is something more to be done to configure Apache with mod_ssl. I tried phpinfo() in php, and mod_ssl is reflected in the Loaded Modules section.

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• Missing APR on apache2 ./configure

  - by arby

  I want to build the latest stable version of apache2. I downloaded the source and put APR & APR-util in the srclib folder, then changed directories to ./srclib/apr and ran: ./configure --prefix=/usr/local/apr sudo make sudo make install This seemed to install APR ok, but when I run ./configure from the apr-util directory, I receive the error: configure: error: APR could not be located. Please use the --with-apr option. Using ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr, the error becomes: checking for APR... configure: error: the --with-apr parameter is incorrect. It must specify an install prefix, a build directory, or an apr-config file. Why can't it find APR?

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• Windows 7 Computer Maintenance - Restore removed Desktop Shortcuts

  - by HaydnWVN

  I'm aware about the inbuilt nightmate 'tool' of Microsofts which is making every network administrators job a nightmare (if left turned on). In short it'll happily delete every desktop shortcut to a network resource. We have it disabled by default. My question is related to recovering these shortcuts, Windows doesn't seem to dump them into the Recycle Bin and although you can 'restore previous versions' of the Desktop folder, you are unable to do it with the user logged in... Rather a problem if you only have the 1 user account. We have a user who (although the 'Computer Maintenance' tool is turned off) had it come up in 'Action Centre' and chose to run it. I've been unable to reproduce it, but the tool has certainly run (and removed 24 shortcuts from her desktop) although it is still saying 'Windows is not checking your system for maintenance problems'. ?! Very fustrating! Any ideas if these shortcuts are backed up/moved elsewhere so i can easily find and restore them?

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• "custom" routers for VPN - useful or waste of money?

  - by Andrew Heath

  I use VPN in China and my current service contract expires soon so I was checking what sort of plans are out there now. I found that Witopia offers a "Cloak Box", what appears to be a Linksys wireless router with allegedly hacked/custom firmware to support VPN. Aside from allowing multiple computers to share one VPN connection, is there anything else at work here to justify that price when most new routers are $100 or less these days? Or is this something targeted towards the cd-rom cupholder crowd? And yes, I've contacted them, but haven't heard back yet... EDIT I've heard back from the company - here are the details if anyone else is interested: the router is a Linksys WRT54GL running TomatoVPN custom firmware the hardware waranty is one (1) year, from Linksys/Cisco the VPN is hard-set, so any device connected to the router MUST use the VPN (Witopia blocks torrents) I've decided it's not for me, but hopefully this information will prove useful to others.

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• Metacity toggle fullscreen not working under Lucid; worked with Karmic.

  - by Andy

  Hi all, I'm working on a 11" screen, so I frequently want to use applications in fullscreen. I'm no expert on GNOME, but I remember doing a search a while back, and finding out about metacity, and how to use that to allow any window to be put in fullscreen. This worked great on Karmic, but it doesn't seem to be working under Lucid. Here's what I do. Run gconf-editor. Go to /apps/metacity/window_keybindings. Change toggle_fullscreen from disabled to <Control><Shift>F. Unfortunately it doesn't work. I know that I've got the right syntax because I can see other shortcuts and use them as a template. I have no idea what's wrong, and no idea how to move forwards/debug. Any suggestions much appreciated. TIA Andy

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• Browsers ignoring hosts file

  - by madkris

  Until recently my browsers started to ignore my hosts file. I have Windows 7 operating system installed. 192.168.0.5 livesite.com I have tried: Clearing browser cache Issued "ipconfig /flushdns" from the command line Issued "ping livesite.com" from the command line (response was "Reply from 192.168.0.5: bytes=32 time=1ms TTL=128") Restarting unit Backing up original hosts file and making a new one Checking lmhosts.sam (everything is commented out) Connecting directly to modem using cable Checked \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DataBasePath Tried it on another laptop with exactly the specs as I have Then I tried Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser ok but only for a sec) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser not ok) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Any idea why it worked for a moment? Or better yet anything I havent tried or some error I may have overlooked?

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• Browsers ignoring hosts file

  - by madkris

  Until recently my browsers started to ignore my hosts file. I have Windows 7 operating system installed. 192.168.0.5 livesite.com I have tried: Clearing browser cache Issued "ipconfig /flushdns" from the command line Issued "ping livesite.com" from the command line (response was "Reply from 192.168.0.5: bytes=32 time=1ms TTL=128") Restarting unit Backing up original hosts file and making a new one Checking lmhosts.sam (everything is commented out) Connecting directly to modem using cable Checked \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DataBasePath Tried it on another laptop with exactly the specs as I have Then I tried Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser ok but only for a sec) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser not ok) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Any idea why it worked for a moment? Or better yet anything I havent tried or some error I may have overlooked?

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• What ports do I need open for IMAP connections

  - by iamjonesy

  I'm developing a web application that connects to an IMAP mailbox and fetches emails as part of it's functionality. The application is PHP and I'm connecting like this: public function connect() { /* connect to gmail */ $hostname = '{imap.gmail.com:993/imap/ssl}INBOX'; $username = $this->username; $password = $this->password; /* try to connect */ $this->inbox = imap_open($hostname,$username,$password) or die('Cannot connect to Gmail: ' . imap_last_error()); } Developing locally on my mac this was fine, I was able to connect and get emails. However now that I've put the app on my web hosts server I'm getting the following error: Cannot connect to Gmail: Can't connect to gmail-imap.l.google.com,993: Connection timed out After checking with my hosting provider they told me outgoing connections on port 993 are blocked. Is there anyway around this? Otherwise I need to upgrade to a dedicated server :S

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• How can I be sure that the motherboard is dead and it's not another issue?

  - by Peter

  So I have and old computer with and Intel D101GGC motherboard and a pentium 4 cpu and award bios, with a long repeating beep and not passing POST. I tried: RAM checking, they are good and working on other computers Replacing the PSU with a tested one, and still having the same issue I assumed that the CPU is dead and tested 2 others they are both Celeron D processors I also tested the CPU of this computer on another one and it's working fine I also tried it without RAM and still have the same long beep I did all this after disconnecting all the other hardware like HDD and DVD drives. The only time I didn't get any beeps is after removing the CPU I don't know if the processor is needed for the beeps to work. So My questions are: is it normal to not get any beeps if we don't have a CPU installed ? am I missing something or is the motherboard dead ? and thanks in advance.

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• Apache repeatedly crashing in OS X 10.6.5

  - by ltackett

  I want to be using the system default Apache available through Web Sharing, not MAMP. Other questions/answers related to similar problems have not helped. Initially, I had MAMP running, but I stopped it because I thought it might be causing a conflict, that didn't work. I also had an issue with apachectl related to the 10.6.5 update, which I fixed. Apachectl reports no syntax errors and seems to be working fine to start|stop|restart apache. Here are the errors that repeat. 12/29/10 11:53:28 AM Firewall[63] httpd is listening from ::ffff:0.0.0.0:80 proto=6 12/29/10 11:53:29 AM com.apple.launchd[1] (org.apache.httpd[8618]) Exited with exit code: 1 12/29/10 11:53:29 AM com.apple.launchd[1] (org.apache.httpd) Throttling respawn: Will start in 10 seconds This is not my area of expertise, so I hope that's enough info to go by.

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• Where are task scheduler event files stored on Windows Server 2008?

  - by MacGyver

  I tried setting up triggers in Task Scheduler Windows Server 2008, but Microsoft needs to fix a bug that I documented on Stack Overflow. So I can't use triggers until they fix this bug. Basically the Task Scheduler doesn't trigger an event that has a Result Code of 2147942402. http://stackoverflow.com/questions/10933033/windows-server-2008-task-scheduler-trigger-xml-syntax-for-email-notification-ta In the mean time, I'd like to write a task that runs .NET code that queries the log/event files programmatically every 15 minutes and sends success/failure emails based on the events that occured for the given tasks in task scheduler. Here's where the XPath is stored for the Task Trigger XML tab (that I can't rely on): C:\Windows\System32\Tasks\ I cannot find where the events (or log files containing the event ids) of each task are stored. Does anyone know where to find these log files? The log name is "Microsoft-Windows-TaskScheduler/Operational".

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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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• apache2 slow responding (debian)

  - by baloo

  I'm running an apache2 2.2.9 webserver with modpython and mpm_worker_module. The current config for the mpm is ServerLimit 32 StartServers 10 MaxClients 800 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 The server has 1G of ram and a 100Mbit connection. Checking netstat -na | grep ESTABLISHED | wc -l gives me a number between 50 - 60. The load is about 1.0 Every pageload is also cached by memcached. I can't see why the server is so slow in responding to new connections, sometimes droping them completely? Also tried disabling iptables to make sure it's not because of a full state table or something like that. The only thing in dmesg is a lot of spam about "TCP: Treason uncloaked!"

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• windows service application run fine on windows XP but crashes on windows7

  - by Abbas Siddiqui

  I am sorry If my question asked before, I search extensively but didn't found. If present please post the link of that question. I have developed windows service that works fine on windows xp , when I installed it on windows7 it installed and works fine for few minutes, after that is crashes and gives the following error message. has stopped working windows is checking for the solution to the problem. the log entry is as follows Fault bucket 1155193276, type 5 Event Name: CLR20r3 Response: Not available Cab Id: 0 Problem signature: P1: windowsserviceapp.exe P2: 1.0.0.0 P3: 4bf29a85 P4: System.Windows.Forms P5: 2.0.0.0 P6: 4a275ebd P7: 16cf P8: 159 P9: System.ComponentModel.Win32 P10: Attached files: C:\Users\DELL\AppData\Local\Temp\WERF98D.tmp.WERInternalMetadata.xml These files may be available here: C:\Users\DELL\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_windowsserviceap_89ea5da5168ff1535681aa613b5f7bf2b1636dc_111d24f1 Analysis symbol: Rechecking for solution: 0 Report Id: 24dc8c83-62a1-11df-b1ee-00271352d813

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• Why is Mac OS X 10.6 using /usr/lib to start Apache when I compiled PHP using /opt/local/lib?

  - by Anthony

  PHP 5.3.3 compiled on Mac OS X 10.6 - using /usr/lib when trying to start Apache... rather than /opt/local/lib specified when PHP was configured. Why is it trying to load from /usr/lib when I specified in my configure not to? httpd: Syntax error on line 115 of /private/etc/apache2/httpd.conf: Cannot load /usr/libexec/apache2/libphp5.so into server: dlopen(/usr/libexec/apache2/libphp5.so, 10): Library not loaded: /opt/local/lib/libiconv.2.dylib\n Referenced from: /usr/libexec/apache2/libphp5.so\n Reason: Incompatible library version: libphp5.so requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 The error message above refers to /opt/local/lib which when I run: otool -LD /opt/local/lib/libiconv.2.dylib Message: /opt/local/lib/libiconv.2.dylib: /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.0.0) It shows that the version is different than what httpd is erring out as. I have a feeling I need to recompile Apache using newer libraries, but the error message still doesn't make too much sense to me.

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• Make Thunderbird3 not switch to firefox after clicking a link

  - by WebDevHobo

  Using ThunderBird 3 on Windows 7. When I get a mail with a link, I usually click it, if I know what it's about. Sadly, Thunderbird switches to Firefox which is opening the new tab. I'm active on several forums and get several of these messages per day. I don't want to click a link, be forced into firefox, go back to thunderbird, click a link, be forced into Firefox, etc... Is there an option to disable this? If not, I can see myself quitting Thunderbird altogheter and simply using web-based email checking instead of using an app.

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• pthread-stubs for CentOS

  - by Rodnower

  Hello, I try to install Mesa 7.8 for CentOS 5. During installation of Mesa I required to install librdm, and during librdm (v. 2.4.19) installing I got error about missing pthread-stubs: checking for PTHREADSTUBS... configure: error: Package requirements (pthread-stubs) were not met: When I try: yum provides *pthread-stubs* I get nothing In other place I found that libxcb-devel is what I need, but yum not find this too. During searching in Google, I found rpm's for Fedora only. Any one know whether there is some packege which provides pthread-stubs for CentOS, or other, less expensive way to install Mesa? Thank you for ahead.

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• Wget - if / else download condition?

  - by Kai

  I want wget to prefer a certain filetype over another, if the files have the same basename. For example: if foo.ogg available, don't download foo.mp3 the way i use wget so far to crawl/automatically download (if anyone is interested): wget -Dfoo.com -I /folder/ -r -l 1 -nc -A.ogg,.mp3 -i http://www.foo.com/folder/ but this, of course, gets me .mp3 AND .ogg files. It often also gets me image files like .png which i didn't want in the first place, and discards them afterwards. Any Ideas? (Syntax-Explanation: -D: download only from this Domain -I: download only from this subfolder of Domain -r: recursive (follow links and directory structure) -l 1: follow only 1 link deep -nc: no clobber = download only if file doesn't exist -A: accept/download only all *.ogg and *.mp3 (discard necessary html-files) -i: download-url/starting point)

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• Software for formatting / web-publishing tutorial-type, technical articles

  - by gojira

  I want to put some of my own technical writing on the web: tutorials, how-to's, conceptual articles about programming etc. I write mostly for myself yet, but think others can benefit from it so I want to put it online, and I also have plans of making everything more coherent and turning it into a book. My articles are not meant as a blog, they're just meant as a collection of tutorials and how-to's, but I think a blog-type software would probably be the most appropriate mode of formatting that kind of stuff. Right now I am using the blog feature of cite u like, which is very low tech and I really need something better. On my wish list is, among other things: code snippets in scrollable boxes syntax highlighting for source code snippets tagging articles with graphical icons according to topic, like in slashdot of course users (i.e. readers) should be able to comment on articles Also, just more options than a super-simple blog should look slick! should not look wikipedia-like Is there any software you can recommend for this purpose?

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• Gitweb showing opposite colors for added and removed text

  - by Maddy

  Hi, I have installed gitweb in our servers. And it started showing the branches and the commit diffs. But the syntax highlighting is opposite particularly for added and removed text. Supposed added text should be in green and removed text should be red. But I am seeing an opposite one. I can hack gitweb.css to get my job done. But felt like knowing why such issue is happening? And what might be the proper fix. (if any one knows good themes for gitweb? please mention)

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• Targus USB-to-RS232 not working with Linux?

  - by Ethan Leroy

  I have the Targus PA088 USB to RS232 converter, but it seems that it does not work with linux. Its RX and TX lights are flashing, but I can't see the data in minicom/picocom. When using it with Windows and hterm, everything's fine. Any idea what could be the problem? Additional info: When I plug in the adapter, I can see the following messages in /var/log/messages.log Nov 25 01:47:31 localhost kernel: [ 831.787066] usb 2-1.1: new full speed USB device number 5 using ehci_hcd Nov 25 01:47:32 localhost kernel: [ 832.554810] mct_u232 2-1.1:1.0: MCT U232 converter detected Nov 25 01:47:32 localhost kernel: [ 832.555002] usb 2-1.1: MCT U232 converter now attached to ttyUSB0 Nov 25 01:47:32 localhost mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1" Nov 25 01:47:32 localhost mtp-probe: bus: 2, device: 5 was not an MTP device

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• Using SQL Server specific code in Access linked to SQL Server database

  - by Brennan Vincent

  Hi, I have an access file that is linked (through an ODBC connection) to a SQL Server 2008 database. I am trying to write some reports against this database. However, Access chokes when I write the select query of the report with SQL syntax specific to SQL Server that doesn't exist in access. Shouldn't this work, since it's the SQL Server engine running the queries and just sending the data back to Access to display? Is there any way to get this to work? Need this to work on any combination of Access 2007 and 2010, and SQL Server 2005 and 2008. Edit Note: I cannot create a SQL Server stored procedure or function, or otherwise modify the original (SQL Server) schema in any way.

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