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• What's the best way to know if your web server goes down?

  - by Mike Christensen

  I noticed my website only got 8 visitors today, which means it probably went down very early this morning and I never noticed. Why it went down is another story. Ideally, I'd like to be emailed if my web server becomes unresponsive or does not return an HTTP 200. Is there either a cloud-based service (either free or pretty cheap) that can monitor your website? If not, is there a good free/open source program I can run on either a Linux or Windows machine that will monitor a website and email me if it goes down? Thanks!

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• How to add higher video resolution in Ubuntu 10.04 (UNR on EEE1101HA)

  - by lexu

  I picked up an ASUS EEE 1101HA with Windows 7 and installed UBUNTU 10.04 Netbook Remix (dual boot). Ubuntu runs fine, but it doesn't recognize that the notebook LCD is 1388x768 and thus only offers 1024x768 and 800x600 as monitor resolution. So .. how can I tell it about that higher resolution? (Have root pwd & vi, una-bash-ed to use both.. ) UPDATE there is currently (early May 2010) no video-driver for the Intel GMA500 "Poulsbo" => no solution exists for now.

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• Can't change (enable/disable) features on Windows 7

  - by Cristy

  I can't make any changes to Windows Features. Even if I just enter in Windows Features and press Ok I get: "An error has occured. Not all of the features were successfully changed." I noticed this while trying to install/uninstall IIS. If I try to install IIS from the Web Platform I get: [Windows package manager] The referenced assembly could not be found. Operation failed with 0x80073701 Any suggestions? EDIT: I have tried - Startup Repair. It says it has found problems but is unable to solve them - System restore (but didn't had an early enough restore point) :(

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• Ubuntu server failing daily

  - by deanvz

  Symptoms: Server becomes unresponsive - Increase in load, all services stop Loss of connectivity - Ping/SSH Flush MySQL hosts after reboot - As MySQL refuses new connections Intermittent Apache crashes Generally happens early morning hours - 2 days of the week are however excluded Changes made: Updated the OS - to Ubuntu 10.04.4 LTS Not sure if the MySQL server was also updated in the process Current MySQL version - mysql Ver 14.14 Distrib 5.1.63, for debian-linux-gnu (x86_64) using readline 6.1 Updated Plesk from 10.4.4 Update #47 to 11.0.9 Update #23 Rebooted on almost daily basis All crons stopped for the times corresponding to the server crashes Created a MySQL log to monitor the lock times on queries Possible causes: Failing hardware Incorrect software configuration (MySQL, Apache etc) Responsibilities: Small webserver Runs our billing system - WHMCS Responsible for CRONs Bulk-email solution - No delivery times coincide with server crashes Proposed solutions: Move machine over to VM Format and restore the Plesk server backup and take it from there? Side notes: Seems to be a general Apache failure across all our linux servers - Intermittent problem Are we doing something fundamentally wrong in the Apache config? (I understand that this is a secondary question, just making sure that it isnt possibly holding any relevance)

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• Type App Name To Launch/Activate in Win 8.1?

  - by Rubistro

  Early versions of Windows 8 had this amazingly useful feature: Hit the Windows Key Type the first few letters of an application name Hit Enter to activate it (make it frontmost) If the application was not already running, it would launch it. This still happens, even in Windows 8.1. But if the application was already running, it would still be brought to the front. This is broken in Windows 8.1 (It was also broken in later versions of Windows 8.) Has anyone found a fix for this? So that the application is always brought frontmost, whether or not it is already running?

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• At what year in history was computers first used to store porn? [closed]

  - by Emil H

  Of course this sounds like a joke question, but it's meant seriously. I remember being told by an old system administrator back in the early nineties about people asking about good FTPs for porn, and that they would as a joke always tell them to connect to 127.0.0.1. They would come back saying that there was a lot of porn at that address, but that oddly enough it seemed like they already had it all. Point being, it seems like it's been around for quite a while. Anyway. Considering that a considerable portion of the internet is devoted to porn these days, it would be interesting to know if someone has any kind of idea as to when and where the phenomena first arose? There must be some mention of this in old hacker folk lore? (Changed to CW to emphasize that this isn't about rep, but about genuine curiousity. :)

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• White Screen of Death

  - by cust0s

  The other night I updated my iTunes to the latest version (through Software Update) when I came to turn on my computer I was greeted with the dreaded white screen of death. I use an early 2008 iMac 24". I've tried the basic things, unplugging/turning off accessories, trying to boot from the install disk, reseting pram, etc, etc. Still no luck and no change what-so-ever. All I've been able to ascertain that my keyboard still works (by ejecting). I should point out that I did recently replace my Hard drive with a Western Digital Black 500GB (though the computer is well out of warrenty) and I'm a little concerned that the problem could be the screen.

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• Visual Studio hangs Windows

  - by Kronikarz

  I have: Windows XP Pro SP3 with latest updates, drivers, .NET, etc. Pentium 4 2.8GHz 2GB RAM 150GB HD ATI Radeon HD 3400 Recently (as early as a week ago) Visual C++ (both 2005 Pro and 2008 Express) started hanging up my computer. Whenever they are run, after 5-20 minutes of work the computer freezes. Everything becomes unresponsive, including the mouse cursor. No combination of keys does anything. What's strange, is that Winamp/Firefox continues to play whatever it was playing at the time (internet radio, mp3 playlist, etc). The only thing I can do is a hard reboot. I've run CCleaner and a full AVG antivirus scan, both of which found nothing suspicious. Does anyone know of a solution to this problem?

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• Can someone recommend a Compact Flash card to be used as a boot disk

  - by Hamish Downer

  I have an early Acer Aspire One netbook, and the flash drive is really slow at writing. I've taken it apart to add more RAM, but I've pretty much stopped using it. I've read about people replacing the SSD with a Compact Flash card and a CF to ZIF adapter but I've also read about some Compact Flash cards where the manufacturer has permanently disabled the boot flag to stop people doing this kind of mod. (Can't find the link any more though). So my most specific question is: can someone recommend a compact flash card that does allow the boot flag to be set? Please say whether you've done it yourself, or just heard about it from someone else. Beyond that, is this generally a problem?

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• Cooling a large laptop

  - by sazabi02

  I've had my first laptop early this year and I haven't the slightest idea how to make it cooler. No real problems when I don't use graphics intensive games but when I play games like Dragon Age the temps rise up from 55 to 85. I'm concerned as a friend tells me that HP laptops aren't reputed to last long when it comes to heat. BTW, I've already bought a cooling pad with 3 fans and it didn't do much that elevating it and pointing an electric fan at it didn't do before. Additionally, this is a 17 inch HP dv7-3085dx entertainment notebook that i'm using.

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• Mac Grey/White Screen of Death

  - by cust0s

  The other night I updated my iTunes to the latest version (through Software Update) when I came to turn on my computer I was greeted with the dreaded white screen of death. I use an early 2008 iMac 24". I've tried the basic things, unplugging/turning off accessories, trying to boot from the install disk, reseting pram, etc, etc. Still no luck and no change what-so-ever. All I've been able to ascertain that my keyboard still works (by ejecting). I should point out that I did recently replace my Hard drive with a Western Digital Black 500GB (though the computer is well out of warrenty) and I'm a little concerned that the problem could be the screen.

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• Good reasons to keep 32-bit Microsoft Windows desktop OSes

  - by Mark Henderson

  Server software has been 64-bit only for a while now (Since Server 2008 R2 for Windows, even earlier for Exchange and Sharepoint) and even Ubuntu are pushing you away from 32-bit versions for their server OSes. But is there any good, quantifiable reason to keep a 32-bit desktop operating system maintained? We're preparing our Windows 8 images for the (unfortunate?) few that will be early adopters. The majority of our desktop computers have 4gb or less of RAM, but I would love to not have to bother supporting a 32-bit flavoured operating system any more. Any reason why I should?

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• (simple) linux HA with vmware vsphere?

  - by derhelge

  I hope my upcoming question is specific enough, and you are able and willing to support :-) We have several openSUSE VMs in an ESX-Cluster (three ESX-Servers) with an attached iSCSI-SAN. All of those Linux VMs are "single point of failure"-configured, which means in the case of a Web-Server: LAMP, storage, etc. everything on this machine. This was very simple and in case of a failure (in the last years: kernel panics or apache crashes) a simple reboot triggered by a script did it. But the problem is: How to upgrade/maintain the w(eb-)application or the underlying OS without downtime? This wasn't really managable and i did this in the early morning ;) How can i achieve a "simple" High-Availability Cluster now? I thought of: DRBD with heartbeat with 2 VMs. And for the storage a RDM (raw device mapped) LUN and change the read-write-permissions for both VMs. Is this a good idea? Anyone has a better solution?

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• Can someone recommend a Compact Flash card to be used as a boot disk/fixed disk.

  - by Hamish Downer

  I have an early Acer Aspire One netbook, and the flash drive is really slow at writing. I've taken it apart to add more RAM, but I've pretty much stopped using it. I've read about people replacing the SSD with a Compact Flash card and a CF to ZIF adapter but I've also read about some Compact Flash cards where the manufacturer has permanently disabled the boot flag to stop people doing this kind of mod. (Can't find the link any more though). (Although I have just found some info about CF cards that says "Most CompactFlash cards by default identify themselves as removable media instead of fixed disk" and that this is an issue for Windows. So my most specific question is: can someone recommend a compact flash card that does allow the boot flag to be set and to be set as Fixed Disk? Please say whether you've done it yourself, or just heard about it from someone else. Beyond that, is this generally a problem?

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• Any good reason to keep 32-bit desktop OS's

  - by Mark Henderson

  Server software has been 64-bit only for a while now (Since Server 2008 R2 for Windows, even earlier for Exchange and Sharepoint) and even Ubuntu are pushing you away from 32-bit versions for their server OS's. But is there any good, quantifiable reason to keep a 32-bit desktop operating system maintained? We're preparing our Windows 8 images for the (unfortunate?) few that will be early adopters. The majority of our desktop computers have 4gb or less of RAM, but I would love to not have to bother supporting a 32-bit flavoured operating system any more. Any reason why I should?

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• How do I know if my SSD Drive supports TRIM?

  - by Omar Shahine

  Windows 7 has support for the TRIM command which should help ensure that the performance of an SSD drive remains good through it's life. How can you tell if a given SSD drive supports TRIM? See here for a description of TRIM. Also the following from a Microsoft presentation: Microsoft implementation of “Trim” feature is supported in Windows 7 NTFS will send down delete notification to the device supporting “trim” File system operations: Format, Delete, Truncate, Compression OS internal processes: e.g., Snapshot, Volume Manager Three optimization opportunities for the device Enhancing device wear leveling by eliminating merge operation for all deleted data blocks Making early garbage collection possible for fast write Keeping device’s unused storage area as much as possible; more room for device wear leveling.

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• Upgrade AirPort on Macs to support Snow Leopard's Wake on Wireless/WLAN?

  - by wojo

  Snow Leopard now supports Wake on WLAN, but not all hardware supports this. For example, my Octo Mac Pro from early 2008 has an AirPort card, but it does not support this. Nor does my 2007 2.33GHz MacBook Pro. For reference to what is needed, look at http://www.macrumors.com/2009/08/28/a-closer-look-at-snow-leopards-wake-on-demand-feature/ which includes a screenshot of what the System Profiler should show. It's pretty hard to find Apple parts, but is it possible to put newer cards into these machines to have them support Wake on Wireless?

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• Cannot find the "Create Network" menuitem in the WiFi icon menu in Mountain Lion

  - by Chuancong

  I am using Mountain Lion Developer Preview 2. I cannot find the "Create Network" menuitem in the WiFi icon menu in the menubar. It was there before when I was using Lion. It started missing since I upgraded to Mountain Lion Developer Preview 1. By the way, is there any other method to create an ad-hoc WiFi network on OS X? I tried to use Internet Sharing via WiFi, but other devices using the shared connection could not find the Mac in their local networks. I am using an early 2011 MacBook Pro 15'. Thanks.

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• dialup connection script

  - by BParker

  I've just started working for a company who produce a specialist modem. In the test department they simulate actual use with a bunch of pc's acting as clients connecting over this modem. As such each needs to dial a set of dial-up connections. Each of these has to be created manually, and currently takes quite a while on each machine, so i was hoping to be able to automate the creation process. Back in the early days of the internet i remember getting CD's from ISP's where the dial-up connection was configured automatically, and i was wondering if anyone lknew how to do this, or if they could point me in the direction of a tutorial about it. To be clear, i don't want to automate actually dialing the connection, but i do want to run a script which creates the icons in the networking applet that allows us to dial these connection. Thanks in advance!!!

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• SQL Server iSCSI session issue with a NetApp SAN

  - by Matt Beckman

  We had an issue early this morning when iSCSI issues broke connectivity with a few of our databases (resulting in a SQL Server Error 21). Attempts to DBCC CheckDB did not work, and the only solution was to restart the SQL Service. Is there a known reason why an iSCSI initiator session would reset itself out of the blue? Example below from the NetApp syslog. This set of errors was replicated 4 times (once for each SQL server in production). Only one SQL server was noticeably impacted, however. [san1: iscsi.notice:notice]: ISCSI: iswta, ISID Rule: new connection from same initiator, shutting down old session 7 [san1: iscsi.notice:notice]: ISCSI: iswta, New session from initiator iqn.1991-05.com.microsoft:sql1.example.corp at IP addr 10.xxx.xxx.123

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• Multiple CD writer taking long to burn

  - by Mirage

  I have installed 6 DVD writers in Tower case. I am using Alcohol Software to burn multiple CDS. I have seen that about 4 dvd/cd writer finish recording early but some take long time finish and their speed is around 7x. Its not that those are the only writers doing that, some times other writer write slowly. But there are always 1 or 2 writer which takes about 25 min to write the 700Mb cd and some finish in 5 mins Why is that. All writers can write upto 40px speed. Which thing determines the speed

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• How to fix White Screen of Death after updating iTunes?

  - by cust0s

  The other night I updated my iTunes to the latest version (through Software Update) when I came to turn on my computer I was greeted with the dreaded white screen of death. I use an early 2008 iMac 24". I've tried the basic things, unplugging/turning off accessories, trying to boot from the install disk, reseting pram, etc, etc. Still no luck and no change what-so-ever. All I've been able to ascertain that my keyboard still works (by ejecting). I should point out that I did recently replace my Hard drive with a Western Digital Black 500GB (though the computer is well out of warrenty) and I'm a little concerned that the problem could be the screen.

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• Prevent udev / uevents looking up DVD at boot time

  - by Sampo

  Problem: Boot time delay caused by udev. Early after initscripts starts there is message saying waiting for uevents to be processed and causing delay on boot, it seems that udev is looking if there is disc in dvd tray. After udev has found disc, boot process continues normally. Main question: How to prevent udev dvd lookup at boot time? Maybe there is some way to skip some udev related stuff and let boot process continue and then later instruct udev to do stuff that may cause some delay (delay in uevents, but not in main boot process, is acceptable after udev is initially loaded).

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• Why does some of the songs in my iTunes library stop prematurely and go to the next song?

  - by joshhunt

  For the couple of weeks a whole bunch of the songs from my iTunes library stop early and skip to the next song (just as if it was at the end of the song). Although the point where it skips varies for each song (for one song it is 2:32, another is 2:46), it will always skip at the same point for each song. A while back I ran BPMer and, although it crashed half way through, it did not appear to corrupt my music the way it is now. A few days ago I backed up my iTunes library and reformatted my hard drive (for a completely unrelated issue) and reinstalled OS X from scratch. The problem was happening before and after the reinstall. This problem also persists when the music is synced across to my iPod touch running 3.0. Listening to the same troublesome songs in my iPod causes them to end prematurely. However, I can listen to the whole song using Quicklook, so the problem must be with my iTunes library or something.

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• SQL Azure Federation - how much data before performance benefits?

  - by Donald Hughes

  To avoid premature optimization, I don't want to implement SQL Azure's Federation too early. Is there a rule of thumb for how much data a table would need to have before seeing performance benefits from sharding? I know there won't be a precise answer as there are too many variables to consider, especially with much of SQL Azure's resources being hidden/unknown. To put it into several, more concrete examples, would Federation improve performance in any of the below table scenarios: 100,000 rows (~ 200 MB) 1,000,000 rows (~ 2 GB) 10,000,000 rows (~ 20 GB) 100,000,000 rows (~ 200 GB) For the sake of elaboration, we can assume this is the largest table that would be federated, which consists of order details, which is joined to an orders table with a 'customer_id' foreign key, which would be the distribution key. This is a fairly standard multi-tenant, CRUD order entry system, with a typical assortment of reporting needs (customer order totals by day/month/year, etc).

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