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• Postgresql Internals - Documentation

  - by NogginTheNog

  I'm looking for some up-to-date information about postgresql internals, specifically the query optimizer. I've found this link (referred to in the "Further Reading" section of the 8.4 docs):- http://db.cs.berkeley.edu//papers/UCB-MS-zfong.pdf but it seems quite old. That in itself is not a problem, but I wanted to be sure that I have information that is relevant. Is this the best resource for understanding how postgresql processes queries (using plans, statistics etc.) or are there others?

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• check two conditions in two different columns in excel and count the matches

  - by user1727103

  I've trying to create a Error Log to help me analyse my mistakes. So for simplicity, lets assume I have two columns "Type of Question" - with values SC,RC,CR and another column that indicates whether I got this question "right/wrong".Let's assume this is my table: Question No. | Right/Wrong | Question Type | Right | SC | Right | RC | Wrong | SC | Wrong | CR | Right | RC (Pardon my formatting skills). And I want an output table like this Type of Question | Right | Wrong | Total SC | 1 | 1 | 2 RC | 2 | 0 | 2 CR | 0 | 1 | 1 So basically what I want to do is check Column3 for SC using =COUNTIF(C1:C5,"SC"), and return the total number of SC questions, and then outta the SC , I need to find out which are Right.If I know the right and the total I can get the wrong. I have never written a macro so a formula based answer would suffice.

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• Can't Read/Write the Hard disk used in NAS

  - by mgpyone

  I've lately purchased a Synology DS212j and I intended to use my two 3.5" HDs into it. One of them was in used as an external HD. Thus when I install these two unit in NAS, it asked me to formatted in order to used with its format (I think it's ext3?) . I installed the Disks and omit the formatting option. I just got another 3.5" Hard Disk now. I've installed it in the NAS. everything's fine. However, when I take out the (used) HD from the NAS and install back in the standalone casing, I found out that it can't be read from both OSX an Windows 7. I've tried with ext2sd and I only found 2GB portion of the whole 1.5 TB Hard Disk. Here's another reference from EASEUS Partition Master

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• Ubuntu syslog does not show previous days's logs

  - by Mirage

  My Cron job is not running and i want to see what's problem in the syslog. But that log is only showing current date only , Is there any way to keep logs for the last 10 days?

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• Is there a modern Windows FLAC encoder application? [closed]

  - by David Yaw

  I've decided I want to use FLAC for my music library, but I'm not sure what I should be using to encode the FLAC files. The latest release on flac.sourceforge.net is 5 years old, as are all of the other applications shown on the download page. Googling for updated encoders has just led me back to the same 5 year old apps. Is there a more up-to-date FLAC encoder, either a Windows GUI or Windows CLI app?

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• Dying SanDisk Memory Stick Pro Duo

  - by Different55

  I have a Memory Stick Pro Duo and after attempting to delete the largest file from a Mac the stick has become unusable. I can almost access it. When I put it in my PC I can open/delete/copy/paste/rename/modify one file/folder, then it can't detect the card. If I reinsert the card I can move on to the next file, but this is really annoying and my PSP won't read it at all. The memory card access light will flash for a really long time before it says that every file is corrupted. When I have tried to format it with either the PC, PSP, or a camera that uses a memory stick pro duo, it fails. I've tried with all the different options on windows, I tried formatting it through CMD, but nothing I have tried works. Should I copy every file off one by one or is there a way to fix it?

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• Simple, current how-to install mod-security on cPanel server?

  - by linux911

  Does anyone have or know of a simple, up to date how to for installing mod-security on cPanel and configuring it after install? Every how to on the web I've found is at least two years old and is based on a mod-security addon function in cPanel which doesn't exist anymore. There are a couple of free add ons to simplify selecting rule files (configserver's for example) but there's no documentation on which rules a cPanel system "should" be using and so on.

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• gmetric data submitted doesn't follow dmax value

  - by 580farm

  I have a custom script that is querying a metric port for an application that I'm running and submitting parsed values to ganglia via gmetric. The script runs every minute, so I submit the data to ganglia using the following gmetric options: /usr/sbin/gmetric -g ec2 -s positive -t uint32 -d 600 -n "$NAME" -v $VALUE -x 60 But for some reason there are still gaps in the graphing data: Is there something in my formatting that is preventing the dmax/ttl of the last metric received from being honored? Is there anyone who does custom metric collection that has run into this problem before that can shed some insight or provide some tips as to how to best correct this?

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• How do I see a history of what I've POST-ed in Google Chrome?

  - by Tomas Lycken

  I just submitted a form that included a text box, in which I had written a quite long text. In another textbox, I filled in a date in the wrong format - and instead of getting an error message, the web site just acted as if my form submission was valid, except nothing was saved. Is there any way to see the history of what has been POST-ed (in the current session, at least), from where I can recover my lost text?

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• USB3 does not work in fresh Ubuntu install

  - by Adéline

  I have a new computer with an Asus P8Z68-V LE + Intel i2500 + 8GB of RAM. I installed Ubuntu without any issue, but the USB3 (from the motherboard - on the back of the computer) doesn't work. I plug a USB stick -- nothing, I plug my USB3 external drive -- nothing, when I plug them into the USB2 and everything works perfectly. Also, I ran all updates and everything is up to date. What am I missing?

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• AHK for creating folder + subfolders

  - by quanto

  I need an AHK script which creates: a folder in the currently open folder in Windows Explorer (under Windows 7), whose name consists the current date in the format (yyyy-mm-dd) the text which is currently in the clipboard the newly created folder must contain 3 subfolders, named "1", "2", and "3" I'd like to copy a few words (e.g. Testing Testing Testing) from another application, go to a location on my harddisk (using Windows Explorer), activate the hotkey, and AHK will create for me a folder named: 2012-06-04 Testing Testing Testing with subfolders "1", "2", and "3".

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• Wired USB mouse left button stops working

  - by InNeedOfHelp

  My wired USB mouse's left button stops working properly after being plugged into the computer for about five minutes. The mouse button will become sticky and not allow me to select things or the left button is completely unresponsive. The mouse driver is up to date. I am running Windows Vista Home Premium with the Service Pack 2 on a Sony Viao laptop (Model number (VGN-NW125J). If anybody knows how to fix this your help would be greatly appreciated.

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• Direct access to website's database with single click?

  - by Mick

  I have noticed that when selecting options (drop down menus, radio buttons etc) on some websites you see an ever more complex URL being created and then you can use that URL to access that website at a later date and go straight to the page with your desired options. Unfortunately on other websites the URL remains fixed and you appear to have no choice but to select the options all over again. I was wondering if there was some utility that would help automate this process.

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• Executing a command in vim from a commandline

  - by TK

  I would like to run :helptags ~/.vim/doc in vim, but from command line. The purpose is to run the command occasionally with other commands to keep my tools up-to-date (probably in a cron job on my development machine. I looked around man vim, but cannot figure out what option I need to pass. I think this is a general question for vim, but I'm using Mac and Ubuntu for the development.

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• Files copying between servers by creation time

  - by driftux

  My bash scripting knowledge is very weak that's why I'm asking help here. What is the most effective bash script according to performance to find and copy files from one LINUX server to another using specifications described below. I need to get a bash script which finds only new files created in server A in directories with name "Z" between interval from 0 to 10 minutes ago. Then transfer them to server B. I think it can be done by formatting a query and executing it for each founded new file "scp /X/Y.../Z/file root@hostname:/X/Y.../Z/" If script finds no such remote path on server B it will continue copying second file which directory exists. File should be copied with permissions, group, owner and creation time. X/Y... are various directories path. I want setup a cron job to execute this script every 10 minutes. So the performance is very important in this case. Thank you.

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• Are there any Spreadsheet apps that are as easy and powerful to use as Vim?

  - by ovatsug25

  I'd like to use a spreadsheet that lets me move around cells like I do in Vim. As well, the more commands that are attributed to keyboard shortcuts, the better. Particularly stuff like making Text-to-Columns which is one of my more frequently used features in Excel. I don't mind learning the shortcuts if they allow me to just look at the spreadsheet page and forget about everything else. edit: The way I am thinking about the Spreadsheet right now is as if every cell is its own unique file. There should be a command where I choose to open that file and edit it right on the spot within the view of the spreadsheet. So I guess I want different modes like in vim which have commands and there should be one mode that is hooked up just to do operations or formatting which would be similar to command mode in Vim.

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• Using Sigmatel STAC 92XX on Windows 7 RTM x64, cannot get 5.1 surround sound to work

  - by Roy Rico

  I have a Dell XPS 420. I've installed Windows 7 RTM (x64) I have this audio device: SIGMATEL STAC 92XX C-Major HD Audio I have tried using the windows 7 basic driver, and also the Vista 64-bit driver from Dell's website (details): Date: 10/29/2007 Version: 6.10.0.5511, A04 File Size: 7 MB With both drivers, I get normal stereo sound from the driver, but my 5.1 surround sound doesn't work. Has anyone experienced this? Is there a fix?

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• What sites/publications are good for staying current on security and malware trends?

  - by Holocryptic

  In my ever expanding quest for knowledge, I'm at the point where I feel like I need to be more up to date with the current security trends, as well as malware and such that are in the wild. I'd like to be able to say, "I've heard of that and the fix is...." versus, "Oh, yeah, I had that eat up half my network before I contained it...." What sites and publications are good for keeping up with these things?

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• Renaming an Invalid Filename in NTFS

  - by Sadeq Dousti

  Recently, I loaned my flash disk to one of my friends, who had Mac OS. He copied a file on it, whose name included a backslash (\). The flash disk is NTFS formatted. Windows does not allow such filenames, and neither opens the file, nor deletes it, nor lets me delete the file. There are naive approaches to this problem, like: Formatting the flash disk; Giving it back to my friend and asking to rename it; Loading into some live Linux and renaming it. However, I'm looking for something more clever, like a program that can do the trick under Windows. PS: There's a tool called NTFSWalker which can browse the MFT records of the NTFS, but is unable to make any changes to them.

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• Format Excel cells to display as '##:##:##'

  - by David Gard

  I'm trying to format cells in Excel so that they display the total duration of phone calls as hh:mm:ss, but Excel is giving me errors. Sometimes durations are only mm:ss (49:10), or even just ss (35), and I need them by default to change to 00:49:10 and 00:00:35 respectivly. However, when I select 'Custom' on the 'Number' tab when formatting the cells and enter either 00:00:00 or ##:##:##, Excel tells me - Microsoft Office Excel cannot use the number format you typed. Also, hh:mm:ss will not work for me, as I'm dealing in durations, not times. Is anyone able to tell me how do format this? Thanks.

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• Is it possible to run a "Windows Server 2008 R2 SP1 Hyper-V Virtual Machine" on Windows 7x64 Pro machine?

  - by tbone

  Specifically, I want to run this: http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=27417 This download contains a three Windows Server 2008 R2 SP1 Hyper-V Virtual Machine set for evaluating and demonstrating Office 2010, SharePoint 2010 and Project Server 2010. System requirements Supported operating systems: Windows Server 2008 R2 Additionally you will need: •Windows Server 2008 R2 (SP1 recommended) with the Hyper-V role enabled. •Drive Formatting: NTFS •Processor: Intel VT or AMD-V capable •RAM: 8 GB or more recommended •Hard disk space required for install: 100 GB ------------------------- So, the above text seems to indicate that you need a physical Windows 2008 Server (r2) server running, but from the googling I've done on the subject I've yet to come across a discussion that definitively answers the question. Many posts I've read seem to indicate it might be possible to run it on Windows 7 using one of the following: VirtualBox, Windows Virtual PC, VMWare but I'm not entirely sure.

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• Batch change modified/created dates?

  - by Billiam

  I recently bought new hard drives for my NAS. This means that I'm copying all the data off the NAS, upgrading it, and then moving the data back. I've gotten as far as copying the data from the NAS, but every file's modified/created date has been changed to when it was copied (today). Is there a way, keeping in mind that I have the original data, to batch update the modified/created dates on the copied files without having to copy them over again (we're talking over a terabyte of data)?

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• Can the onborad LAN cause computer shutdown

  - by user1146320

  I have P4 processor with nvidia card. Now if i don't connect to internet then my computer stays on for as much i can like 4-5 days. But if i plug in the ethernet wire. Do some surfing and leave computer as it is. Then computer fails. I mean The display on screen gets off Looks like something stopping the power supply to Harddisk. But motherboard stays on , FAN is still running , i can eject CD drive as well. But no display on monitor. I have to turn off and then turn on again. I tried formatting windows XP but again same problem

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• Take a screenshot of an entire webpage in Opera

  - by robertc

  Is there some tool within Opera, or possibly an add-on, which will let me take a screenshot of an entire web page? I usually use Screengrab to do this with Firefox, but in this situation I want a screenshot of the page as Opera renders it (because I want to show the page as rendered with HTML5 form controls like date and time). I am currently using Opera 10.60 x86_64 on Fedora 12, so solutions that work in browser would be preferable rather than external programs.

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• Move markers of line chart/ Format legend

  - by user68753

  Hi all, I have a combination chart with a bar chart and 2 line graphs on secondary axis. have to exactly match the formatting in the screenshot attached ( I do not have the actual excel file. just have a screenshot). If you have a look - you can see the markers on line graphs do not align. The red line markers are skewed slightly to the left. Also, in the legend at the bottom - secondary axis legends are separated out to the bottom. I don't know how to do that either. Any help is greatly appreciated

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