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• How to recover zfs pool when root fs fails?

  - by user27138

  I have a FreeBSD 8.0 amd64 box w/ 1 ATA drive for system root and 4 SATA drives as a RAIDZ pool. The ATA drive isn't mirrored nor part of any pool, but also doesn't hold any valuable data (other then the system). How can I recover my zpool if this ATA drive fails for any reason, but assume my RAIDZ vdev SATA drives remain intact? Should I also use at least a mirror configuration for that?

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• How to redirect all postfix emails to one external email address?

  - by thierrythelliez

  To create a test email server, I have a similar requirement as: http://serverfault.com/questions/94640/how-to-redirect-all-outgoing-email-from-postfix-to-a-single-address-for-testing But I need to send all the emails to an external account, not a local one. I would like to do something like: xyz:[email protected] but xyz is not local nor smtp.

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• Why can't I display Unicode math symbols (U+2200..U+22FF)?

  - by rodnower

  I have windows XP and in any application on my computer i don't see this range, nether in IE nor in Notepad++... I become crazy... Thank you very much for ahead.

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• Copy all text in a LibreOffice Draw drawing

  - by harbichidian

  I have a large flowchart, created in LibreOffice Draw (3.3.1), that I would like to copy all of the text from. I do not need, nor care about the order or structure, I just need all of the text from within the blocks. I can't seem to find any way to export without turning it into an image, and none of the "Paste Special" options allow me to get unformatted text. Is there a way to do this without retyping everything?

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• Cannot access windows share folder

  - by haroldmoma

  In my windows domain, there's been happening a problem with the access to some of our shared folders: There appears a "the account is disabled" problem whe trying to access those. When looking at the the Active Directory Groups and Users snap-in, there's no user blocked nor disabled and the users trying to access the shared folders don't have any problem logging in on their respective computers. Needless to say, they have proper permissions on the network shares to be accessed. What might be the problem?

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• ubuntu server on virtual machine new installation

  - by user123198

  I have problem with installing apache on the ubuntu server running on virtual machine. (one of the so called cloud hosting) Installation went smooth apache is started but I can't access it through http://84.51.250.58[this is not a link] (just to see first "It works!" page) nor I can ping let say google.com using shell from remote viewer. It's brand new installation, it should work or am I missing something?

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• PowerPoint Paste HTML Loss of Color

  - by Tim

  I am trying to paste HTML into powerpoint 2007. Everything works ok except that I lose the color of the text and the font. I am using the paste special method selecting html. Now I have read that some people have fixed the color loss problem by setting a color printer as their default. But that does not seem to be working for me nor would it fix the font. Thank you for any help.

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• How to access files on another local Windows 7 computer without using any native Windows features?

  - by user1356682

  I do not want to use any native Windows features, services, nor anything do to this. It needs to be a standalone program, with ZERO Windows dependencies. Just like TeamViewer does not use any native Windows features, so I want to be able to access files and folders in a standalone program. No remote desktop No VNC type programs No Windows File Sharing No Shared Folders in Windows No internet connection required It needs ability to view, edit, transfer files at normal network rates.

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• How to get WIndows Vista to remember the Option Size All Colums To Fit for all Folders

  - by Brandon_R

  How to get WIndows Vista to remember the Option Size All Colums To Fit for all Folders everytime. Rightclick on name and you would see the option Size All Colums Ti Fit. How do i get Vista to remember this option for all folders? Currently when i activate it, and i go to another folder it doesn't apply for that folder nor when i close the current folder in which i have applied said option and then open the same folder.

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• How to get WIndows Vista to remember the Option Size All Colums To Fit for all Folders

  - by Brandon_R

  How to get WIndows Vista to remember the Option Size All Colums To Fit for all Folders everytime. Rightclick on name and you would see the option Size All Colums Ti Fit. How do i get Vista to remember this option for all folders? Currently when i activate it, and i go to another folder it doesn't apply for that folder nor when i close the current folder in which i have applied said option and then open the same folder.

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• I don't get object-oriented programming

  - by Joel J. Adamson

  Note: this question is an edited excerpt from a blog posting I wrote a few months ago. After placing a link to the blog in a comment on Programmers.SE someone requested that I post a question here so that they could answer it. This posting is my most popular, as people seem to type "I don't get object-oriented programming" into Google a lot. Feel free to answer here, or in a comment at Wordpress. What is object-oriented programming? No one has given me a satisfactory answer. I feel like you will not get a good definition from someone who goes around saying “object” and “object-oriented” with his nose in the air. Nor will you get a good definition from someone who has done nothing but object-oriented programming. No one who understands both procedural and object-oriented programming has ever given me a consistent idea of what an object-oriented program actually does. Can someone please give me their ideas of the advantages of object-oriented programming?

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• Google-bot sees “Sorry, we have no imagery here” on pages with Google Maps

  - by friism

  I have a site with Google Maps on most of the pages. When inspecting content keywords in Google Webmaster tools, content keywords identified by Google-bot for the site include "imagery", "sorry" and "here". These turn out to be part of an error message returned by Google Maps: "Sorry, we have no imagery here". I cannot reproduce this error with normal clients, nor does "fetch as Google" show it. The problem is presumably that Google-bot tries to execute some of the Google Maps Javascript but then shoots itself on the foot and records the error message. A Google search for "Sorry, we have no imagery here" shows that this problem is endemic to sites across the internet, including Yelp and many others. I'd like to convince Google that my site is not about imagery and being sorry, but I'd also like to keep the maps in place. I guess one option would be to transition to static maps, but that's not a great alternative. There's some related discussion on Webmaster World, no resolution.

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• Windows 8 changes GRUB2 in every boot!

  - by yxd

  I've installed Win8 and Ubuntu 12.10 both UEFI style (win8 first then ubuntu). GRUB2 shows me Both Ubuntu and Win8 entries. If I boot into Ubuntu is fine. I could reboot anytime I will see GRUB2 unchanged. The story changes when I Boot into Win8. When I boot to Win8 using GRUB2 it takes me to the Windows Boot manager (which only has the Windows 8 entry). I hit Windows and it boots fine. When I reboot, there's no GRUB2 nor Win loader. It has no boot loader. I boot a liveCD and download boot-repair and everything is back. It's a never ending cycle. Is GRUB2 supposed to load the Win boot loader? What can I do to fix it?

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• 3D Huge mesh rendering

  - by Keyhan Asghari

  I am writing a program, that as input, I have a huge 3d mesh (with mostly structured and cubic shaped elements), and I want to realtime render it, but not as real-time as a game. But speed of rendering is somehow important. The most important point is, I don't need any special lighting nor any shadows. Also, the objects to render are static, and they do not move. I've read about ray tracing methods, but I don't know if there is any good libraries for this purpose, or I have to implement everything by myself. Thanks a lot.

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• Eclipse ADT: Layout Properties Editor doesn't work correctly

  - by NullNoname

  I have a new, clean installation of Eclipse Kepler (4.3.1) SR1 (x64) in Linux Mint 15 Olivia x64 (based on Ubuntu 13.04 “Raring Ringtail”). ADT version is 22.3.0, and Java is Oracle's 1.7.0_45. The problem is, I cannot edit the properties in layout editor; nothing happens when I click "..." button, nor I can edit the properties directly by clicking the empty space. The boolean properties don't even contain the checkbox. This doesn't happen in Windows XP 32bit, with the same versions of Eclipse and ADT: Anyone know any workarounds/reasons for this? Looks like Mac OS X Mountain Lion had a similar issue in the past, but I heard that was fixed, and I'm talking about Linux version here. I had no such problems in Eclipse Indigo and an old version of ADT, but I can't remember the exact versions of them. EDIT: Lubuntu 13.04 (32bit) in VMware Player doesn't have this problem.

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• I don't get object-oriented programming

  - by Joel J. Adamson

  Note: this question is an edited excerpt from a blog posting I wrote a few months ago. After placing a link to the blog in a comment on Programmers.SE someone requested that I post a question here so that they could answer it. This posting is my most popular, as people seem to type "I don't get object-oriented programming" into Google a lot. Feel free to answer here, or in a comment at Wordpress. What is object-oriented programming? No one has given me a satisfactory answer. I feel like you will not get a good definition from someone who goes around saying “object” and “object-oriented” with his nose in the air. Nor will you get a good definition from someone who has done nothing but object-oriented programming. No one who understands both procedural and object-oriented programming has ever given me a consistent idea of what an object-oriented program actually does. Can someone please give me their ideas of the advantages of object-oriented programming?

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• Bad performance with ATI Radeon X1300?

  - by stighy

  Hi, i'm having problem with Ubuntu 10.04 and my Ati radeon X1300. In particular i can't enable effect (compiz) because they are SLOW, and, for example, the same game (hedgewars) on the same pc run very slowly on Linux, nor in Windows. With my old Ubuntu (9.04) i didn't have the same problem. Does anyone help me to "configure" the right driver for my video card ? I've tested with proprietary (fglrx) and open (xorg..-ati-radeon)... Either give me some problem :(! Thank you!

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• Xaudio2 XAPO Effects

  - by Jason Champion

  I've been working with XAudio2. After looking at the samples, example code, and sparse documentation available from Microsoft and the MSDN, I've found that there aren't any easy-to-find resources on creating and using XAPO effects, nor any XAPO effects produced by third parties that I can download and/or buy. What it looks like is that if I create an app that uses XAPO effects, I'll have to create them all myself because there's no community of existing applications like there is with technologies like Apple's AU or Steinberg's VST. Is this true, or are there others using XAudio2 and XAPO and I just haven't found them? Is there a place to ask programmer-support-related questions about XAudio2 and related technologies (or is this the best destination)? The best I've found so far are the XNA forums, which are game-specific and sparsely populated in the audio area.

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• Can't connect to wifi after 13.10 update - Qualcomm Atheros AR93xx Wireless Network Adapter [168c:0030] (rev 01)

  - by user1952119

  I updated Ubuntu to 13.10 last night and wifi was working fine until I went to wake up my computer this morning and no WiFi connection. I am on a iMac with Qualcomm Atheros AR93xx Wireless Network Adapter [168c:0030] (rev 01). The only solutions I have seen so far are for broadcomm WiFi drivers. There is no wifi driver in addition drivers only graphics drivers. Not sure how to fix this, Any help would be greatly appreciated. UPDATE: WiFi works after reboot but doesn't after being put to sleep nor does Ethernet connect after sleep.

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• Can't adjust screen brightness on Macbook Pro 10,1 Ubuntu 13.10

  - by ben101

  I recently installed Ubuntu on my retina Macbook Pro (following this great guide: http://cberner.com/2013/03/01/installing-ubuntu-13-04-on-macbook-pro-retina/) Everything works fine so far however the screen brightness / backlight cannot be adjusted neither by using the assigned key nor by any other means. I know, I'm not the first to address this problem, but all the suggested solutions I found so far did not work for me. I unsuccessfully tried the following: Including Option "RegistryDwords" "EnableBrightnessControl=1" in the Devices-Section of /etc/X11/xorg.conf the application xbacklight I also haven't found any file such as mbp_backlight or apple_backlight on my system which probably would be a starting point I'm using the Nvidia-driver. (BTW: With the nouveau-driver, the keys to adjust the brightness work. However, with the nouveau driver Ubuntu does not resume from suspend mode) Any suggestions what I can do? Thanks!

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• Learning language is enough to create average applications ?

  - by Freshblood

  Many books teach a programming language. However, knowing a specific language is not the same as knowning application or GUI design nor project layout. So, attempting to make an average application fails after learning a language. It is clear that knowing a language is not enough to make an application. If you agree with what I have said, why doesn't anyone mention this instead of teaching pure language syntax and features? Why books don't mention how to make a better application ?

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• What should web programmers know about cryptography?

  - by davidhaskins

  Should programmers who build websites/web applications understand cryptography? I have no idea how most crypographic algorithms work, and I really don't understand the differences between md5/des/aes/etc. Have any of you found any need for an in-depth understanding of cryptography? I haven't needed it, but I wonder if perhaps I'm missing something. I've used salt + md5 hash to encrypt passwords, and I tell webservers to use SSL. Beyond that, I can't say I've used much else, nor can I say with any certainty how secure these methods are. I only use them because other people claim they are safe. Have you ever found a need to use cryptography in web programming aside from these two simple examples?

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• Genetic algorithms with large chromosomes

  - by Howie

  I'm trying to solve the graph partitioning problem on large graphs (between a billion and trillion elements) using GA. The problem is that even one chromosome will take several gigs of memory. Are there any general compression techniques for chromosome encoding? Or should I look into distributed GA? NOTE: using some sort of evolutionary algorithm for this problem is a must! GA seems to be the best fit (although not for such large chromosomes). EDIT: I'm looking for state-of-the-art methods that other authors have used to solved the problem of large chromosomes. Note that I'm looking for either a more general solution or a solution particular to graph partitioning. Basically I'm looking for related works, as I, too, am attempting using GA for the problem of graph partitioning. So far I haven't found anyone that might have this problem of large chromosomes nor has tried to solve it.

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• Why do you need float/double?

  - by acidzombie24

  I was watching http://www.joelonsoftware.com/items/2011/06/27.html and laughed at Jon Skeet joke about 0.3 not being 0.3. I personally never had problems with floats/decimals/doubles but then I remember I learned 6502 very early and never needed floats in most of my programs. The only time I used it was for graphics and math where inaccurate numbers were ok and the output was for the screen and not to be stored (in a db, file) or dependent on. My question is, where are places were you typically use floats/decimals/double? So I know to watch out for these gotchas. With money I use longs and store values by the cent, for speed of an object in a game I add ints and divide (or bitshift) the value to know if I need to move a pixel or not. (I made object move in the 6502 days, we had no divide nor floats but had shifts). So I was mostly curious.

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• UBUNTU 12.04 Networking

  - by Fr. Lawrence winslow

  I have installed UBUNTU 12.04 on my Athlon 64-bit Desktop (2GB Memory) in a dual-boot with Win XP. The machine is hardwired to my D-Link N router which uses a DSL Modem to access the Internet. My Home Network was established in the router via the XP machine. When I boot UBUNTU I am able to access the Internet via this set-up but I can neither access the home network nor see the three other laptop computers (wireless access) on the network. These others are running Win Vista, Win 7, and UBUNTU 10.04 (this latter accesses the home network normally). All are visible and accessible when XP is running. I would appreciate thoughts as I am seriously thinking about changing all the computers to UBUNTU but do need to be able to operate the network.

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