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  • ubuntu eucalyptus with XEN

    - by selvakumar
    to my final year project.i want deploy private cloud on the non VT enabled processor(dual core processor) using ubuntu eucalyptus private cloud. i got many tutorial only to implement private cloud with VT enabled processor(WITH KVM hypervisor) with UBUNTU SERVER 10.04. but it possible to implement with XEN without virtual extension processor. so can anyone help me to implement private cloud using ubuntu server 10.04 with two systems or one system and dual core processor and xen. thank you.

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  • DD-WRT RIP2 Router mode configuration

    - by Eduardo
    Can anybody tell me why my wireless router only redirects traffic to ADSL modem when it is on Gateway mode? These are the configurations when it is on RIP2 Router mode: ADSL Modem: ------------ LAN IP: 10.1.1.1 Subnet mask: 255.0.0.0 RIP v2 enabled in both directions Route: destination: 192.168.1.0 Subnet mask: 255.255.255.0 Gateway: 10.1.1.2 Wireless Router (DD-WRT) ------------------------ WAN IP: 10.1.1.2 WAN Subnet mask: 255.0.0.0 LAN IP: 192.168.1.1 LAN Subnet mask: 255.255.255.0 Operating mode: RIP2 Router Static Route: Destination LAN NET: 10.0.0.0 Subnet Mask: 255.0.0.0 Gateway: 10.1.1.1 Interface: LAN & WLAN

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  • Week in Geek: 4chan Falls Victim to DDoS Attack Edition

    - by Asian Angel
    This week we learned how to tweak the low battery action on a Windows 7 laptop, access an eBook collection anywhere in the world, “extend iPad battery life, batch resize photos, & sync massive music collections”, went on a reign of destruction with Snow Crusher, and had fun decorating our desktops with abstract icon collections. Photo by pasukaru76. Random Geek Links We have included extra news article goodness to help you catch up on any developments that you may have missed during the holiday break this past week. Note: The three 27C3 articles listed here represent three different presentations at the 27th Chaos Communication Congress hacker conference. 4chan victim of DDoS as FBI investigates role in PayPal attack Users of 4chan may have gotten a taste of their own medicine after the site was knocked offline by a DDoS attack from an unknown origin early Thursday morning. Report: FBI seizes server in probe of WikiLeaks attacks The FBI has seized a server in Texas as part of its hunt for the groups behind the pro-WikiLeaks denial-of-service attacks launched in December against PayPal, Visa, MasterCard, and others. Mozilla exposes older user-account database Mozilla has disabled 44,000 older user accounts for its Firefox add-ons site after a security researcher found part of a database of the account information on a publicly available server. Data breach affects 4.9 million Honda customers Japanese automaker Honda has put some 2.2 million customers in the United States on a security breach alert after a database containing information on the owners and their cars was hacked. Chinese Trojan discovered in Android games An Android-based Trojan called “Geinimi” has been discovered in the wild and the Trojan is capable of sending personal information to remote servers and exhibits botnet-like behavior. 27C3 presentation claims many mobiles vulnerable to SMS attacks According to security experts, an ‘SMS of death’ threatens to disable many current Sony Ericsson, Samsung, Motorola, Micromax and LG mobiles. 27C3: GSM cell phones even easier to tap Security researchers have demonstrated how open source software on a number of revamped, entry-level cell phones can decrypt and record mobile phone calls in the GSM network. 27C3: danger lurks in PDF documents Security researcher Julia Wolf has pointed out numerous, previously hardly known, security problems in connection with Adobe’s PDF standard. Critical update for WordPress A critical update has been made available for WordPress in the form of version 3.0.4. The update fixes a security bug in WordPress’s KSES library. McAfee Labs Predicts Geolocation, Mobile Devices and Apple Will Top the List of Targets for Emerging Threats in 2011 The list comprises 2010’s most buzzed about platforms and services, including Google’s Android, Apple’s iPhone, foursquare, Google TV and the Mac OS X platform, which are all expected to become major targets for cybercriminals. McAfee Labs also predicts that politically motivated attacks will be on the rise. Windows Phone 7 piracy materializes with FreeMarketplace A proof-of-concept application, FreeMarketplace, that allows any Windows Phone 7 application to be downloaded and installed free of charge has been developed. Empty email accounts, and some bad buzz for Hotmail In the past few days, a number of Hotmail users have been complaining about a rather disconcerting issue: their Hotmail accounts, some up to 10 years old, appear completely empty.  No emails, no folders, nothing, just what appears to be a new account. Reports: Nintendo warns of 3DS risk for kids Nintendo has reportedly issued a warning that the 3DS, its eagerly awaited glasses-free 3D portable gaming device, should not be used by children under 6 when the gadget is in 3D-viewing mode. Google eyes ‘cloaking’ as next antispam target Google plans to take a closer look at the practice of “cloaking,” or presenting one look to a Googlebot crawling one’s site while presenting another look to users. Facebook, Twitter stock trading drawing SEC eye? The high degree of investor interest in shares of hot Silicon Valley companies that aren’t yet publicly traded–like Facebook, Twitter, LinkedIn, and Zynga–may be leading to scrutiny from the U.S. Securities and Exchange Commission (SEC). Random TinyHacker Links Photo by jcraveiro. Exciting Software Set for Release in 2011 A few bloggers from great websites such as How-To Geek, Guiding Tech and 7 Tutorials took the time to sit down and talk about their software wishes for 2011. Take the time to read it and share… Wikileaks Infopr0n An infographic detailing the quest to plug WikiLeaks. The New York Times Guide to Mobile Apps A growing collection of all mobile app coverage by the New York Times as well as lists of favorite apps from Times writers. 7,000,000,000 (Video) A fascinating look at the world’s population via National Geographic Magazine. Super User Questions Check out the great answers to these hot questions from Super User. How to use a Personal computer as a Linux web server for development purposes? How to link processing power of old computers together? Free virtualization tool for testing suspicious files? Why do some actions not work with Remote Desktop? What is the simplest way to send a large batch of pictures to a distant friend or colleague? How-To Geek Weekly Article Recap Had a busy week and need to get caught up on your HTG reading? Then sit back and relax while enjoying these hot posts full of how-to roundup goodness. The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 The 20 Best How-To Geek Linux Articles of 2010 How to Search Just the Site You’re Viewing Using Google Search Ask the Readers: Backing Your Files Up – Local Storage versus the Cloud One Year Ago on How-To Geek Need more how-to geekiness for your weekend? Then look through this great batch of articles from one year ago that focus on dual-booting and O.S. installation goodness. Dual Boot Your Pre-Installed Windows 7 Computer with Vista Dual Boot Your Pre-Installed Windows 7 Computer with XP How To Setup a USB Flash Drive to Install Windows 7 Dual Boot Your Pre-Installed Windows 7 Computer with Ubuntu Easily Install Ubuntu Linux with Windows Using the Wubi Installer The Geek Note We hope that you and your families have had a terrific holiday break as everyone prepares to return to work and school this week. Remember to keep those great tips coming in to us at [email protected]! Photo by pjbeardsley. Latest Features How-To Geek ETC The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC The Complete List of iPad Tips, Tricks, and Tutorials Tune Pop Enhances Android Music Notifications Another Busy Night in Gotham City Wallpaper Classic Super Mario Brothers Theme for Chrome and Iron Experimental Firefox Builds Put Tabs on the Title Bar (Available for Download) Android Trojan Found in the Wild Chaos, Panic, and Disorder Wallpaper

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  • Upgrading Windows 8 boot to VHD to Windows 8.1&ndash;Step by step guide

    - by Liam Westley
    Originally posted on: http://geekswithblogs.net/twickers/archive/2013/10/19/upgrading-windows-8-boot-to-vhd-to-windows-8.1ndashstep-by.aspxBoot to VHD – dual booting Windows 7 and Windows 8 became easy When Windows 8 arrived, quite a few people decided that they would still dual boot their machines, and instead of mucking about with resizing disk partitions to free up space for Windows 8 they decided to use the boot from VHD feature to create a huge hard disc image into which Windows 8 could be installed.  Scott Hanselman wrote this installation guide, while I myself used the installation guide from Ed Bott of ZD net fame. Boot to VHD is a great solution, it achieves a dual boot, can be backed up easily and had virtually no effect on the original Windows 7 partition. As a developer who has dual booted Windows operating systems for years, hacking boot.ini files, the boot to VHD was a much easier solution. Upgrade to Windows 8.1 – ah, you can’t do that on a virtual disk installation (boot to VHD) Last week the final version of Windows 8.1 arrived, and I went into the Windows Store to upgrade.  Luckily I’m on a fast download service, and use an SSD, because once the upgrade was downloaded and prepared Windows informed that This PC can’t run Windows 8.1, and provided the reason, You can’t install Windows on a virtual drive.  You can see an image of the message and discussion that sparked my search for a solution in this Microsoft Technet forum post. I was determined not to have to resize partitions yet again and fiddle with VHD to disk utilities and back again, and in the end I did succeed in upgrading to a Windows 8.1 boot to VHD partition.  It takes quite a bit of effort though … tldr; Simple steps of how you upgrade Boot into Windows 7 – make a copy of your Windows 8 VHD, to become Windows 8.1 Enable Hyper-V in your Windows 8 (the original boot to VHD partition) Create a new virtual machine, attaching the copy of your Windows 8 VHD Start the virtual machine, upgrade it via the Windows Store to Windows 8.1 Shutdown the virtual machine Boot into Windows 7 – use the bcedit tool to create a new Windows 8.1 boot to VHD option (pointing at the copy) Boot into the new Windows 8.1 option Reactivate Windows 8.1 (it will have become deactivated by running under Hyper-V) Remove the original Windows 8 VHD, and in Windows 7 use bcedit to remove it from the boot menu Things you’ll need A system that can run Hyper-V under Windows 8 (Intel i5, i7 class CPU) Enough space to have your original Windows 8 boot to VHD and a copy at the same time An ISO or DVD for Windows 8 to create a bootable Windows 8 partition Step by step guide Boot to your base o/s, the real one, Windows 7. Make a copy of the Windows 8 VHD file that you use to boot Windows 8 (via boot from VHD) – I copied it from a folder on C: called VHD-Win8 to VHD-Win8.1 on my N: drive. Reboot your system into Windows 8, and enable Hyper-V if not already present (this may require reboot) Use the Hyper-V manager , create a new Hyper-V machine, using half your system memory, and use the option to attach an existing VHD on the main IDE controller – this will be the new copy you made in Step 2. Start the virtual machine, use Connect to view it, and you’ll probably discover it cannot boot as there is no boot record If this is the case, go to Hyper-V manager, edit the Settings for the virtual machine to attach an ISO of a Windows 8 DVD to the second IDE controller. Start the virtual machine, use Connect to view it, and it should now attempt a fresh installation of Windows 8.  You should select Advanced Options and choose Repair - this will make VHD bootable When the setup reboots your virtual machine, turn off the virtual machine, and remove the ISO of the Windows 8 DVD from the virtual machine settings. Start virtual machine, use Connect to view it.  You will see the devices to be re-discovered (including your quad CPU becoming single CPU).  Eventually you should see the Windows Login screen. You may notice that your desktop background (Win+D) will have turned black as your Windows installation has become deactivate due to the hardware changes between your real PC and Hyper-V. Fortunately becoming deactivated, does not stop you using the Windows Store, where you can select the update to Windows 8.1. You can now watch the progress joy of the Windows 8 update; downloading, preparing to update, checking compatibility, gathering info, preparing to restart, and finally, confirm restart - remember that you are restarting your virtual machine sitting on the copy of the VHD, not the Windows 8 boot to VHD you are currently using to run Hyper-V (confused yet?) After the reboot you get the real upgrade messages; setting up x%, xx%, (quite slow) After a while, Getting ready Applying PC Settings x%, xx% (really slow) Updating your system (fast) Setting up a few more things x%, (quite slow) Getting ready, again Accept license terms Express settings Confirmed previous password Next, I had to set up a Microsoft account – which is possibly now required, and not optional Using the Microsoft account required a 2 factor authorization, via text message, a 7 digit code for me Finalising settings Blank screen, HI .. We're setting up things for you (similar to original Windows 8 install) 'You can get new apps from the Store', below which is ’Installing your apps’ - I had Windows Media Center which is counts as an app from the Store ‘Taking care of a few things’, below which is ‘Installing your apps’ ‘Taking care of a few things’, below ‘Don't turn off your PC’ ‘Getting your apps ready’, below ‘Don't turn off your PC’ ‘Almost ready’, below ‘Don't turn off your PC’ … finally, we get the Windows 8.1 start menu, and a quick Win+D to check the desktop confirmed all the application icons I expected, pinned items on the taskbar, and one app moaning about a missing drive At this point the upgrade is complete – you can shutdown the virtual machine Reboot from the original Windows 8 and return to Windows 7 to configure booting to the Windows 8.1 copy of the VHD In an administrator command prompt do following use the bcdedit tool (from an MSDN blog about configuring VHD to boot in Windows 7) Type bcedit to list the current boot options, so you can copy the GUID (complete with brackets/braces) for the original Windows 8 boot to VHD Create a new menu option, copy of the Windows 8 option; bcdedit /copy {originalguid} /d "Windows 8.1" Point the new Windows 8.1 option to the copy of the VHD; bcdedit /set {newguid} device vhd=[D:]\Image.vhd Point the new Windows 8.1 option to the copy of the VHD; bcdedit /set {newguid} osdevice vhd=[D:]\Image.vhd Set autodetection of the HAL (may already be set); bcdedit /set {newguid} detecthal on Reboot from Windows 7 and select the new option 'Windows 8.1' on the boot menu, and you’ll have some messages to look at, as your hardware is redetected (as you are back from 1 CPU to 4 CPUs) ‘Getting devices ready, blank then %xx, with occasional blank screen, for the graphics driver, (fast-ish) Getting Ready message (fast) You will have to suffer one final reboots, choose 'Windows 8.1' and you can now login to a lovely Windows 8.1 start screen running on non virtualized hardware via boot to VHD After checking everything is running fine, you can now choose to Activate Windows, which for me was a toll free phone call to the automated system where you type in lots of numbers to be given a whole bunch of new activation codes. Once you’re happy with your new Windows 8.1 boot to VHD, and no longer need the Windows 8 boot to VHD, feel free to delete the old one.  I do believe once you upgrade, you are no longer licensed to use it anyway. There, that was simple wasn’t it? Looking at the huge list of steps it took to perform this upgrade, you may wonder whether I think this is worth it.  Well, I think it is worth booting to VHD.  It makes backups a snap (go to Windows 7, copy the VHD, you backed up the o/s) and helps with disk management – want to move the o/s, you can move the VHD and repoint the boot menu to the new location. The downside is that Microsoft has complete neglected to support boot to VHD as an upgradable option.  Quite a poor decision in my opinion, and if you read twitter and the forums quite a few people agree with that view.  It’s a shame this got missed in the work on creating the upgrade packages for Windows 8.1.

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  • Is AMQP suitable as both an intra and inter-machine software bus?

    - by Bwooce
    I'm trying to get my head around AMQP. It looks great for inter-machine (cluster, LAN, WAN) communication between applications but I'm not sure if it is suitable (in architectural, and current implementation terms) for use as a software bus within one machine. Would it be worth pulling out a current high performance message passing framework to replace it with AMQP, or is this falling into the same trap as RPC by blurring the distinction between local and non-local communication? I'm also wary of the performance impacts of using a WAN technology for intra-machine communications, although this may be more of an implementation concern than architecture. War stories would be appreciated.

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  • How can I force a subscriber to be synchronized from a local snapshot?

    - by Brian
    Hello, I have a SQL 2005 server replicating(merge\push) to SQL 2005 and SQL 2000 servers. I have multiple subscribers spread througout the United states. I have set , @snapshot_in_defaultfolder = N'false', @alt_snapshot_folder = N'c:\snapshots\Merge\' (sample location). I take the snapshot from the publisher that is in the same location, 'c:\snapshots\Merge\', and copy it to the subscribers. I wanted to avoid applying the snapshot over the WAN but from the performance I am getting the synchronization is going over the WAN. Does anybody have any ideas how to make sure that I am using the local copy of the snapshot and not the copy at the publisher? Thanks

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  • Pfsense 2.1 OpenVPN can't reach servers on the LAN

    - by Lucas Kauffman
    I have a small network set up like this: I have a Pfsense for connecting my servers to the WAN, they are using NAT from the LAN - WAN. I have an OpenVPN server using TAP to allow remote workers to be put on the same LAN network as the servers. They connect through the WAN IP to the OVPN interface. The LAN interface also servers as the gateway for the servers to get internet connection and has an IP of 10.25.255.254 The OVPN Interface and the LAN interface are bridged in BR0 Server A has an IP of 10.25.255.1 and is able to connect the internet Client A is connecting through the VPN and is assigned an IP address on its TAP interface of 10.25.24.1 (I reserved a /24 within the 10.25.0.0/16 for VPN clients) Firewall currently allows any-any connection OVPN towards LAN and vice versa Currently when I connect, all routes seem fine on the client side: Destination Gateway Genmask Flags Metric Ref Use Iface 300.300.300.300 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.25.0.0 10.25.255.254 255.255.0.0 UG 0 0 0 tap0 10.25.0.0 0.0.0.0 255.255.0.0 U 0 0 0 tap0 0.0.0.0 300.300.300.300 0.0.0.0 UG 0 0 0 eth0 I can ping the LAN interface: root@server:# ping 10.25.255.254 PING 10.25.255.254 (10.25.255.254) 56(84) bytes of data. 64 bytes from 10.25.255.254: icmp_req=1 ttl=64 time=7.65 ms 64 bytes from 10.25.255.254: icmp_req=2 ttl=64 time=7.49 ms 64 bytes from 10.25.255.254: icmp_req=3 ttl=64 time=7.69 ms 64 bytes from 10.25.255.254: icmp_req=4 ttl=64 time=7.31 ms 64 bytes from 10.25.255.254: icmp_req=5 ttl=64 time=7.52 ms 64 bytes from 10.25.255.254: icmp_req=6 ttl=64 time=7.42 ms But I can't ping past the LAN interface: root@server:# ping 10.25.255.1 PING 10.25.255.1 (10.25.255.1) 56(84) bytes of data. From 10.25.255.254: icmp_seq=1 Redirect Host(New nexthop: 10.25.255.1) From 10.25.255.254: icmp_seq=2 Redirect Host(New nexthop: 10.25.255.1) I ran a tcpdump on my em1 interface (LAN interface which has the IP of 10.25.255.254) tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on em1, link-type EN10MB (Ethernet), capture size 96 bytes 08:21:13.449222 IP 10.25.24.1 > 10.25.255.1: ICMP echo request, id 23623, seq 10, length 64 08:21:13.458211 ARP, Request who-has 10.25.255.1 tell 10.25.24.1, length 28 08:21:14.450541 IP 10.25.24.1 > 10.25.255.1: ICMP echo request, id 23623, seq 11, length 64 08:21:14.458431 ARP, Request who-has 10.25.255.1 tell 10.25.24.1, length 28 08:21:15.451794 IP 10.25.24.1 > 10.25.255.1: ICMP echo request, id 23623, seq 12, length 64 08:21:15.458530 ARP, Request who-has 10.25.255.1 tell 10.25.24.1, length 28 08:21:16.453203 IP 10.25.24.1 > 10.25.255.1: ICMP echo request, id 23623, seq 13, length 64 So traffic is reaching the LAN interface, but it's not getting passed it. But no answer from the 10.25.255.1 host. I'm not sure what I'm missing.

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  • Network config / gear question

    - by mcgee1234
    I have been tasked with setting up a fairly straightforward rack in a data center (we do not even need a whole rack, but this is the smallest allotment available). In a nutshell, 4 to 6 servers need to be able to reach 2 (maybe 3) vendors. The servers needs to be reachable over the internet. A little more detail - the networks the servers need to reach are inside of the data center, and are "trusted". Connections to these networks will be achieved through intra data center cross connects. It is kind of like a manufacturing line where we receive data from one vendor (burst-able up to 200 Mbits), churn through it on the servers, and then send out data to another vendor (bursts up to 20 Mbits). This series of events is very latency sensitive, so much so that it is common practice not to use NAT or a firewall on these segments (or so I hear). To reach the servers over the internet, I plan to use a site to site VPN. (This part is only relevant as far as hardware selection goes). I have 2 configurations in mind: Cisco 2911 (2921) (with the additional wan ports module) and a layer 2 switch - in this scenario, I would use the router also for VPN. Cisco 3560 layer 3 switch to interconnect the networks inside of the data center and an ASA 5510 (which is total overkill, but the 5505 is not rack mountable) as a firewall for the Wan side (internet) and VPN. I envision the setup to be as follows: Internet - ASA - 3560 Vendors - 3560 - Servers The general idea is that the ASA acts as a firewall and VPN device and the 3560 does all the heavy lifting. The first is a fairly traditional setup but my concern is performance. The second is somewhat unorthodox in that the vendors are directly connected to the layer 3 switch without passing through a firewall. Based on my understanding however, a layer 3 switch will perform substantially better as it will do hardware (ASIC) vs. software switching. (Note that number 2 is a little over the budget, but not unworkable (double negative, ugh)) Since this is my first time dealing with a data center, I am not sure what the IP space is going to look like. I suspect I will retain a block(s) of public IPs, vlan them to individual interfaces for the vendor connections and the servers (which will not reachable from the wan side of course) and setup routing on the switch. So here are my questionss: Is there a substantial performance difference between 1 and 2, i.e. hardware based switching on a layer 3 vs a software base on the 2911? I have trolled the internet and found a lot of Cisco literature, but nothing that I could really use to get a good handle. The vendors we connect to are secure and trusted (famous last words) and as I understand it, it is common practice not to NAT or firewall these connections (because of the aforementioned latency sensitivity). But what what kind of latency are we really talking about if I push the data through a router (or even ASA for that matter)? For our purposes, 5 ms will not kill us, 20 or 30 can be very costly. Others measure in microseconds, but they are out of our league. Is there any issues with using public IPs on a layer 3 switch? I am certainly not married to either of these configs, and I am totally open to any ideas. My knowledge (and I use the term loosely) is largely from books so I welcome any advice / insight. Thanks in advance.

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  • How To Quickly Reboot Directly from Windows 7 to XP, Vista, or Ubuntu

    - by The Geek
    One of the biggest annoyances with a dual-boot system is having to wait for your PC to reboot to select the operating system you want to switch to, but there’s a simple piece of software that can make this process easier. This guest article was written by Ryan Dozier from the Doztech tech blog. With a small piece of software called iReboot we can skip the above step all together and instantly reboot into the operating system we want right from Windows. Their description says: “Instead of pressing restart, waiting for Windows to shut down, waiting for your BIOS to post, then selecting the operating system you want to boot into (within the bootloader time-limit!); you just select that entry from iReboot and let it do the rest!” Don’t worry about iReboot reconfiguring  your bootloader or any dual boot configuration you have. iReboot will only boot the selected operating system once and go back to your default settings. Using iReboot iReboot is quick and easy to install. Just download it, link below, run through the setup and select the default configuration. iReboot will automatically figure out what operating systems you have installed and appear in the taskbar. Go over to the taskbar and right click on the iReboot icon and select which operating system you want to reboot into. This method will add a check mark on the operating system you want to boot into. On your next reboot the system will automatically load your choice and skip the Windows Boot Manager. If you want to reboot automatically just select “Reboot on Selection” in the iReboot menu.   To be even more productive, you can install iReboot into each Windows operating system to quickly access the others with a few simple clicks.   iReboot does not work in Linux so you will have to reboot manually. Then wait for the Windows Boot Manager to load and select your operating system.   Conclusion iReboot works on  Windows XP, Windows Vista,  and Windows 7 as well as 64 bit versions of these operating systems. Unfortunately iReboot is only available for Windows but you can still use its functionality in Windows to quickly boot up your Linux machine. A simple reboot in Linux will take you back to Windows Boot Manager. Download iReboot from neosmart.net Editor’s note: We’ve not personally tested this software over at How-To Geek, but Neosmart, the author of the software, generally makes quality stuff. Still, you might want to test it out on a test machine first. If you’ve got any experience with this software, please be sure to let your fellow readers know in the comments. Similar Articles Productive Geek Tips Restart the Ubuntu Gnome User Interface QuicklyKeyboard Ninja: 21 Keyboard Shortcut ArticlesTest Your Computer’s Memory Using Windows Vista Memory Diagnostic ToolEnable or Disable UAC From the Windows 7 / Vista Command LineSet Windows as Default OS when Dual Booting Ubuntu TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Home Networks – How do they look like & the problems they cause Check Your IMAP Mail Offline In Thunderbird Follow Finder Finds You Twitter Users To Follow Combine MP3 Files Easily QuicklyCode Provides Cheatsheets & Other Programming Stuff Download Free MP3s from Amazon

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  • Math with Timestamp

    - by Knut Vatsendvik
    table.sql { border-width: 1px; border-spacing: 2px; border-style: dashed; border-color: #0023ff; border-collapse: separate; background-color: white; } table.sql th { border-width: 1px; padding: 1px; border-style: none; border-color: gray; background-color: white; -moz-border-radius: 0px 0px 0px 0px; } table.sql td { border-width: 1px; padding: 3px; border-style: none; border-color: gray; background-color: white; -moz-border-radius: 0px 0px 0px 0px; } .sql-keyword { color: #0000cd; background-color: inherit; } .sql-result { color: #458b74; background-color: inherit; } Got this little SQL quiz from a colleague.  How to add or subtract exactly 1 second from a Timestamp?  Sounded simple enough at first blink, but was a bit trickier than expected. If the data type had been a Date, we knew that we could add or subtract days, minutes or seconds using + or – sysdate + 1 to add one day sysdate - (1 / 24) to subtract one hour sysdate + (1 / 86400) to add one second Would the same arithmetic work with Timestamp as with Date? Let’s test it out with the following query SELECT   systimestamp , systimestamp + (1 / 86400) FROM dual; ---------- 03.05.2010 22.11.50,240887 +02:00 03.05.2010 The first result line shows us the system time down to fractions of seconds. The second result line shows the result as Date (as used for date calculation) meaning now that the granularity is reduced down to a second.   By using the PL/SQL dump() function, we can confirm this with the following query SELECT   dump(systimestamp) , dump(systimestamp + (1 / 86400)) FROM dual; ---------- Typ=188 Len=20: 218,7,5,4,8,53,9,0,200,46,89,20,2,0,5,0,0,0,0,0 Typ=13 Len=8: 218,7,5,4,10,53,10,0 Where typ=13 is a runtime representation for Date. So how can we increase the precision to include fractions of second? After investigating it a bit, we found out that the interval data type INTERVAL DAY TO SECOND could be used with the result of addition or subtraction being a Timestamp. Let’s try again our first query again, now using the interval data type. SELECT systimestamp,    systimestamp + INTERVAL '0 00:00:01.0' DAY TO SECOND(1) FROM dual; ---------- 03.05.2010 22.58.32,723659000 +02:00 03.05.2010 22.58.33,723659000 +02:00 Yes, it worked! To finish the story, here is one example showing how to specify an interval of 2 days, 6 hours, 30 minutes, 4 seconds and 111 thousands of a second. INTERVAL ‘2 6:30:4.111’ DAY TO SECOND(3)

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  • Interval arithmetic to correctly deal with end of month - Oracle SQL

    - by user2003974
    I need a function which will do interval arithmetic, dealing "correctly" with the different number of days in a month. For my version of "correctly" - see below! First try select to_date('31-May-2014') + interval '1' months from dual This returns an error, because there is no 31st June. I understand that this behaviour is expected due to the ANSI standard. Second try select add_months(to_date('31-May-2014'),1) from dual This correctly (in my use case) returns 30th June 2014, which is great. BUT select add_months(to_date('28-Feb-2014'),1) from dual returns 31st March 2014, when I want 28th March 2014. Background This has to do with legal deadlines. The deadlines are expressed in law as a number of months (say, 3) from a base date. If the base date is last day of the month and three months later the month is longer, then the deadline does NOT extend to the end of the longer month (as per the add_months function). However, if the base date is last day of the month and three months later the month is shorter, then the deadline expires on the last day of the shorter month. Question Is there a function that does what I need? I have intervals (year to month) stored in a table, so preferably the function would look like: add_interval_correctly(basedate DATE, intervaltoadd INTERVAL YEAR TO MONTH)

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  • Luke Skywalker’s Adoption [Video]

    - by Jason Fitzpatrick
    How precisely did Luke Skywalker come to be secreted away on Tatooine? In this clip we see Luke Skywalker’s uncle Owen is entirely uncertain about Obi Wan’s plan for leaving Luke in his care. Luke Skywalker’s Adoption 6 Start Menu Replacements for Windows 8 What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8

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  • Server auto-installed Decnet during dist-upgrade

    - by nixnotwin
    When I did a dist-upgrade of my ubuntu 10.04 server, it automatically installed Decnet, and it trew up ncurses based configuration wizard. I have never heard of Decnet, but I followed the instructions in the wizard, and accepted for it to be installed, and it lead to the disconnection of 2 of my internet uplinks, and the hosted website stopped responding on WAN side. Then I purged Decnet, and rebooted the server, and everything went normal. So why did my server install Decnet when I did dist-upgrade?

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  • How to setup multiple WANs with load balancing?

    - by jon3laze
    What is the best way to setup multiple WAN's into a Ubuntu distro and load balance? I have two internet connections, one static and one dynamic and I need to combine and load balance them. I have been looking into the following method http://www.netlife.co.za/archived-articles/12-started.html but was wondering if anyone had suggestions that were more Ubuntu specific or possibly other distro's that would work better for this.

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  • Mirroring: what happens if principal loses contact with both mirror and wittness?

    - by TiborKaraszi
    Imagine a database mirroring setup where you have two LANs with a WAN link in between. Let's call them site A and site B. Say that principal is currently in site A, and both mirror and witness are in site B. I.e., we are running database mirroring with a witness, and assuming we are running safety FULL (synchronous), we have auto-fail over. Now, what is really fail over when it comes to mirroring? the simple answer is that the mirror will finish the recovery process (UNDO) and make the database available....(read more)

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  • ??????????????????????????????????????????????????Oracle Database 11g Enterprise Edition??????Oracle Data Guard?

    - by Yusuke.Yamamoto
    ????? ??:2011/05/25 ??:???? ??3??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? Oracle Database 11g Enterprise Edition ?????????????????????????·???????????Oracle Data Guard????????????????? Oracle Data Guard ??????????????????????????????? ????????????????????????? Oracle Data Guard???????"???"????????????????????????????????????WAN????????????????????????Oracle Data Guard ?????? ????????? ????????????????? http://oracletech.jp/products/pickup/000298.html

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  • ??????|Oracle Coherence|??????

    - by ???02
    ????????·????/Oracle Coherence???????????????????????Pick Up??????:?IT??????????????????????????????????????????????·??????????????????????????????????????????????????????????????????:???????????????????????????????WAN??????????????????????????* ???????????* ?????????????????????????????????(3?: ?????)???????????:?IT??????????????????????????????????????????????·???????????????????????????????????????????:????????????????????EC????????????????????????????????????????????????* ?????????????* ?DB????????????????????????(1?)?????????????????????????Web????????????????????????????·????????????Web????????????????????????????????????????????????????????????????????????????????????????????????????EC???????????????????????????????????????????????????????????????????????????????????????4????????????????????·???????????????????????(?17???)E??????????????????????4?????·???????????????: ????????????Oracle Coherence:???????????? ????????Oracle Coherence??????????????Oracle WebLogic Suite????????????????????????? -?????????????????-???????????·???????Java?????????????????????????????????????????????????????????·???????????????·??????????????????????·???????????????????????????????: ?????????????????????

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  • Routing a PPTP client and VMware Server instance running on the same box

    - by servermanfail
    I have a Windows 2003 SBS box. It has 2 physical NIC's: WAN and LAN. The WAN is a public IP. The LAN is a simple 192.168.2.x subnet with Microsoft DHCP Server. Microsoft Routing and Remote Access Service is used to provide NAT to LAN. The box also runs VMware Server with a virtual machine running Windows XP. I want people to be able to VPN into the box, and connect to these virtual machines on the MSRDP port. I can VPN (PPTP) into the 2003 SBS box fine, as well as ping other machines on the LAN. I can ping the VM from a physical workstation on the LAN and vice-versa. I can ping the VPN client from the a physical workstation on the LAN and vice-versa. I can ping the VPN client from the Server console and vice-versa. I can ping the VM client from the Server console and vice-versa. But I cannot ping the VPN client from the VM and vice-versa. I was hoping to set up 2 or 3 Windows XP virtual machines on our only server, so that a couple of people can remote in to work without having to leave a physical machine on in the office. You could this attempted set up a "poor mans terminal server". On the 2003 SBS Server:- C:\Documents and Settings\Administrator>route print IPv4 Route Table =========================================================================== Interface List 0x1 ........................... MS TCP Loopback interface 0x2 ...00 50 56 c0 00 08 ...... VMware Virtual Ethernet Adapter for VMnet8 0x3 ...00 50 56 c0 00 01 ...... VMware Virtual Ethernet Adapter for VMnet1 0x10004 ...00 53 45 00 00 00 ...... WAN (PPP/SLIP) Interface 0x10005 ...00 11 43 d4 69 13 ...... Broadcom NetXtreme Gigabit Ethernet 0x10006 ...00 11 43 d4 69 14 ...... Broadcom NetXtreme Gigabit Ethernet #2 =========================================================================== =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 81.123.144.22 81.123.144.21 1 81.123.144.20 255.255.255.252 81.123.144.21 81.123.144.21 1 81.123.144.21 255.255.255.255 127.0.0.1 127.0.0.1 1 81.255.255.255 255.255.255.255 81.123.144.21 81.123.144.21 1 86.135.78.235 255.255.255.255 81.123.144.22 81.123.144.21 1 109.152.62.236 255.255.255.255 81.123.144.22 81.123.144.21 1 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 192.168.2.0 255.255.255.0 192.168.2.3 192.168.2.3 1 192.168.2.3 255.255.255.255 127.0.0.1 127.0.0.1 1 192.168.2.26 255.255.255.255 192.168.2.32 192.168.2.32 1 192.168.2.28 255.255.255.255 192.168.2.32 192.168.2.32 1 192.168.2.32 255.255.255.255 127.0.0.1 127.0.0.1 50 192.168.2.50 255.255.255.255 127.0.0.1 127.0.0.1 1 192.168.2.255 255.255.255.255 192.168.2.3 192.168.2.3 1 192.168.10.0 255.255.255.0 192.168.10.1 192.168.10.1 20 192.168.10.1 255.255.255.255 127.0.0.1 127.0.0.1 20 192.168.10.255 255.255.255.255 192.168.10.1 192.168.10.1 20 192.168.96.0 255.255.255.0 192.168.96.1 192.168.96.1 20 192.168.96.1 255.255.255.255 127.0.0.1 127.0.0.1 20 192.168.96.255 255.255.255.255 192.168.96.1 192.168.96.1 20 224.0.0.0 240.0.0.0 81.123.144.21 81.123.144.21 1 224.0.0.0 240.0.0.0 192.168.2.3 192.168.2.3 1 224.0.0.0 240.0.0.0 192.168.10.1 192.168.10.1 20 224.0.0.0 240.0.0.0 192.168.96.1 192.168.96.1 20 255.255.255.255 255.255.255.255 81.123.144.21 81.123.144.21 1 255.255.255.255 255.255.255.255 192.168.2.3 192.168.2.3 1 255.255.255.255 255.255.255.255 192.168.10.1 192.168.10.1 1 255.255.255.255 255.255.255.255 192.168.96.1 192.168.96.1 1 Default Gateway: 81.123.144.22 =========================================================================== Persistent Routes: None C:\Documents and Settings\Administrator>ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : 2003server Primary Dns Suffix . . . . . . . : mycompany.local Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : Yes WINS Proxy Enabled. . . . . . . . : Yes DNS Suffix Search List. . . . . . : mycompany.local gateway.2wire.net Ethernet adapter VMware Network Adapter VMnet8: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet 8 Physical Address. . . . . . . . . : 00-50-56-C0-00-08 DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.10.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : Ethernet adapter VMware Network Adapter VMnet1: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet 1 Physical Address. . . . . . . . . : 00-50-56-C0-00-01 DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.96.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : PPP adapter RAS Server (Dial In) Interface: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface Physical Address. . . . . . . . . : 00-53-45-00-00-00 DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.2.32 Subnet Mask . . . . . . . . . . . : 255.255.255.255 Default Gateway . . . . . . . . . : NetBIOS over Tcpip. . . . . . . . : Disabled Ethernet adapter LAN: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet Physical Address. . . . . . . . . : 00-11-43-D4-69-13 DHCP Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.2.50 Subnet Mask . . . . . . . . . . . : 255.255.255.0 IP Address. . . . . . . . . . . . : 192.168.2.3 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : DNS Servers . . . . . . . . . . . : 192.168.2.3 Primary WINS Server . . . . . . . : 192.168.2.3 Ethernet adapter WAN: Connection-specific DNS Suffix . : gateway.2wire.net Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet #2 Physical Address. . . . . . . . . : 00-11-43-D4-69-14 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 81.123.144.21 Subnet Mask . . . . . . . . . . . : 255.255.255.252 Default Gateway . . . . . . . . . : 81.123.144.22 DHCP Server . . . . . . . . . . . : 10.0.0.1 DNS Servers . . . . . . . . . . . : 10.0.0.1 Primary WINS Server . . . . . . . : 192.168.2.3 NetBIOS over Tcpip. . . . . . . . : Disabled Lease Obtained. . . . . . . . . . : 25 February 2011 22:56:59 Lease Expires . . . . . . . . . . : 25 February 2011 23:06:59 C:\Documents and Settings\Administrator>ping 192.168.2.11 Pinging 192.168.2.11 with 32 bytes of data: Reply from 192.168.2.11: bytes=32 time<1ms TTL=128 Reply from 192.168.2.11: bytes=32 time<1ms TTL=128 Reply from 192.168.2.11: bytes=32 time<1ms TTL=128 Reply from 192.168.2.11: bytes=32 time<1ms TTL=128

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  • Handshake violation when trying to access one website

    - by Miguel
    I have a TZ 190 Wireless Enhanced with SonicOS Enhanced 4.2.1.0-20e. Yesterday, people could access without any problems a bank website wich uses HTTPS. Today, it is imposible to access only that website, every other ones works without problems. When checking the log message filtering to my IP only, this is what appears and I suspect is the cause of this problem, because all other websites are working: Priority: Notice Category: Network Access Message: TCP handshake violation detected; TCP connection dropped Source: X.Y.Z.3, 51997, LAN (admin) Destination: 200.14.232.18, 443, WAN Notes: Handshake Timeout Where X.Y.Z.3 is my local IP. I've tried to change TCP Settings under Firewall option, and activated this options with no success: Enforce strict TCP compliance with RFC 793 and RFC 1122 and Enable TCP checksum enforcement I've also tried to find the MTU and at first I got: Packet needs to be fragmented but DF set But when I lower the value of ping -f -l to 1468 I got: Request timeout. Also I deactivate CFS in lan and wan zones. Nothing works. Can you please help me? Any Ideas?

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  • Windows Cannot Boot - 0xc0000225

    - by B__
    I've had Windows 7 installed for months on my Thinkpad T60 laptop and today out of the blue when I tried to boot, it started the Windows loading screen and immediately I got this error: Status: 0xc0000225 Info: The boot selection failed because a required device is inaccessible. Through some research, I see people get this problem when a repartitioning goes wrong or there's a problem with their dual boot. I'm not dual booting my machine and I haven't messed with my partitions since I installed the OS. This error is truly out of the blue. I've run memory diagnostics from a Windows boot disc and hard drive diagnostics from my BIOS and neither found a problem. I don't have any backups to restore from so I'm hoping to find a fix for this. Anyone seen this kind of thing before? Thanks

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  • 8Gb Fiber Channcel HBA vs. 10 Gb SPF+ Converged HBA

    - by Hossein Aarabi
    I am putting a Dell server together, more specifically R720. I have to select the correct Host Bus Adapter. This HBA on R710 will connect to a storage device. I am confused between these two: QLogic 2562, Dual Port 8Gb Optical Fiber Channel HBA (price $2,045) QLogic 8262, Dual Port 10Gb SFP+, Converged Network Adapter (price $1,618) I thought since the QLogic 2562 is a fiber channel and is more expensive then it is faster in terms of IOPS. But, it is a 8Gb as opposed to 10 Gb of SFP+. My questions: Which one is better (IOPS performance, etc.)? Why should I choose one over another?

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  • AIX: iscsi volumes disappear after reboot

    - by Dan
    We have an IBM P505 AIX box, with two internal disks and a defined iSCSI volume. The iSCSI volume is defined in it's own volume group, and is connected to an IBM iSCSI DS3300 disk array via the secondary onboard ethernet port (ie, we're not using a dedicated HBA, we're using the second onboard ethernet port for iSCSI exclusively.) When we reboot the AIX box, the iSCSI volume doesn't get mounted (which is fine; I've figured out that it fails to mount because AIX tries mounting it's volumes before starting the networking stack.) The problem is, after the server has booted it fails to redetect the iSCSI target as a physical disk. This means the volume group (iscsivg) can't go online. if I run cfgmgr -v to redetect the iscsi volume it successfully detects the iscsi target volume and creates a physical volume reference, but allocates it a different volume ID to what was defined before. eg - rootvg contains hdisk 0 and 1 iscsivg was originally defined with hdisk2 as the physical iSCSI volume. after reboot and running cfgmgr -v, AIX detects physical volumes hdisk0, hdisk11 and hdisk3. As there's no hdisk2, I can't varyon the iscsivg volume group. I can't seem any existing hdisk2 definition in the ODM. I can't easily add or change the definition of the physcial disk in the iscsivg volume group as it won't "varyon". Exporting the volume group deletes it completely, recreating the volume group by "importing" it from the reallocated disk makes it available again, but surely there's a better way? Can I force a specific hdisk drive designation for an iscsi target? How do you bring online iSCSI volumes after a reboot? I assume this "just works" with a dedicated HBA instead of a generic ethernet adapter? By the way, the iSCSI volume works fine once it's mounted; we only have problems getting it working - and only with AIX. The iSCSI array works fine with our Linux and Windows servers; ie the volumes get detected and remounted after boot time without any problems, using generic ethernet adapters. Here's some of the config from the AIX box: defined disks / devices: # lsdev hdisk0 Available 06-08-01-5,0 16 Bit LVD SCSI Disk Drive hdisk1 Available 06-08-01-8,0 16 Bit LVD SCSI Disk Drive hdisk3 Available Other iSCSI Disk Drive iscsi0 Available iSCSI Protocol Device scsi0 Available 06-08-00 PCI-X Dual Channel Ultra320 SCSI Adapter bus scsi1 Available 06-08-01 PCI-X Dual Channel Ultra320 SCSI Adapter bus ses0 Available 06-08-01-15,0 SCSI Enclosure Services Device sisscsia0 Available 06-08 PCI-X Dual Channel Ultra320 SCSI Adapter iscsi target definition in /etc/iscsi/targets: # IBM DS3300 disk array # port 1 on second controller 10.10.xx.xxx 3260 iqn.1992-01.com.lsi:1535.600a0b80005b0a7fxxxxxxxxxxxx physical volumes (after reimporting the volume group) # lspv hdisk0 0003b08a0d4936b6 rootvg active hdisk1 0003b08aaa5cb366 rootvg active hdisk3 0003b08a032d04bb iscsivg active

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