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• Cannot Create Bootable USB Drive from .iso file

  - by tarabyte

  I've tried formatting the flash drive as FAT as well as Mac OS journaled through diskutility but still cannot successfully create a bootable drive. I'm following the directions here exactly: http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx Environment: Macbook Pro trying to create a bootable flash drive for a Macbook Pro. 8GB flash drive. Tested ubuntu-12.04.1 as well as ubuntu 12.20 .iso 64-bit downloads. Nothing to repair in disk utility for this hard drive. Every time I finish step 8 of the tutorial I get "file system not recognized" with the options to "initialize" meaning to reformat my drive, "ignore" or "eject." When I try to re-inspect the flash drive in disk utility after plugging it back in I see that it has some error when I try to verify it but the "repair" button is disabled. I just want to boot to ubuntu when my mac first starts up. Oh the pain. http://lifehacker.com/5934942/how-to-dual-boot-linux-on-your-mac-and-take-back-your-powerhouse-apple-hardware "linux is free insomuch as your time is worthless" - old wise man

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• Is realtime validation of username good or bad?

  - by iamserious

  I have a simple form for the user to sign up to my site; with email, username and password fields. We are now trying to implement an ajax validation so the user doesn't have to post the form to find out if the username is already taken. I can do this either on keyup event or on text blur event. My question is, which of these is really the best way to do? Keyup From the user POV, it would be good if the validation is done as and when they are typing, (on key up event) - of course, I am waiting for half a second to see if the user stops typing before firing off the request, and user can make any adjustments immediately. But this means I am sending way more requests than if I validated the username on Blur event. Blur The number of requests will be much lower when the validation is done on blur event, But this means the user has to actually go away from the textbox, look at the validation result, and if necessary go back to it to make any changes and repeat the whole process until he gets it right. I had a quick look at google, tumblr, twitter and no one actually does username validations on keyup events, (heck, tubmlr waits for the form to be posted) but I can swear I have seen keyup validations in a lot of places too. So, coming back to the question, will keyup validations be too many for server, is it an unnecessary overhead? or is it worth taking these hits to give user a better experience? ps: all my regex validations etc are already done on javascript and only when it passes all these other criteria does it send a request to server to check if a username already exists. (And the server is doing a select count(1) from user where username = '' - nothing substantial, but still enough to occupy some resource) pps: I'm on asp.net, MS SQL stack., if that matters.

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• Windows 7 automatically rearranges the start menu

  - by Brice

  I've seen so many messages on how to rearrange the Windows Start Menu and none mentioning the real problem in doing so which has been around since XP at least. I go to ProgramData/Microsoft/Windows/Start Menu and have a day making everything the way I want. For one thing, their Maintenance menu, the Accessories menu and the Administrative Tools menu, I like to put under a Tools folder that I've created. And they seem to move OK. However, within a few hours, I see some of the shortcuts have been moved back or copied back and a new copy of these folders suddenly appears again on my Start Menu at the root. This is maddening and no one seems to even notice in all the tutorials I've read. Anyone know how to change this behavior?

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• Tumblr custom domain not redirecting properly

  - by Manic

  I decided to host my blog at Tumblr, using their custom domain setup (http://blog.smokingfishgames.com/ instead of http://smokingfishgames.tumblr.com). However, it's been 72 hours and I'm still getting spotty redirection. It works some of the time--I go and see the page and blog, and it's all fine. However, it occasionally just stops working and redirects back to my web host, which is a directory with nothing but a single file called BUGGER.html (which I stuck in to make sure that it was my web host and not some Tumblr empty directory). Clearing the Chrome DNS cache makes the problem go away--for a while. After a few minutes, or an hour, or however long, I'll start seeing BUGGER.html again. I clear the cache, and poof, the blog shows up. The thing that's curious to me is that when I clear the cache and get BUGGER.html again (which happens occasionally), I can look at my Chrome DNS cache and see assets.tumblr.com UNSPECIFIED blog.smokingfishgames.com UNSPECIFIED www.tumblr.com UNSPECIFIED IP addresses and expiration times omitted for brevity's sake--if they're important I'm sure I can replicate the issue. This implies, to me anyway, that my browser is reaching Tumblr but getting bounced back to my web host. Any reason why this would be happening, or is this a normal symptom of DNS propagation? If it is a problem, should I be bothering Tumblr or my host with it, or is this something I can fix myself?

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• Best Usage of Multiple Computers For a Developer

  - by whaley

  I have two Macbook Pros - both are comparable in hardware. One is a 17" and the other a 15". The 17" has a slightly swifter CPU clock speed, but beyond that the differences are completely negligible. I tried a setup a while back where I had the 17" hooked up to an external monitor in the middle of my desk with the 15" laptop immediately to the right of it, and was using teleport to control the 15" from my 17". All development, terminal usage, etc. etc. was being done on the 17" and the 15" was primarily used for email / IM / IRC... or anything secondary to what I was working on. I have a MobileMe account so preferences were synced, but otherwise I didn't really use anything else to keep the computers in sync (I use dropbox/git but probably not optimally). For reasons I can't put my finger on, this setup never felt quite right. A few things that irked me was the 15" was way under-utlized and the 17" was overutilized having 2 laptops and a 21" monitor all on one desk actually took up lots of desk space and it felt like I had too much to look at. I reverted back to just using the 17" and the external monitor and keeping the 15" around the house (and using it very sparingly). For those of you who are using multiple laptops (or just multiple machines for that matter), I'd like to see setups that work for you for when you have 2 or more machines that gives you optimal productivity and why. I'd like to give this one more shot but with a different approach than my previous - which was using the 15" as a machine for secondary things (communication, reading documentation, etc. etc).

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• Distributed Nagios Installation

  - by kruczkowski

  I'm looking for a plug-in or product that will act as a remote probe and perform tests then send back the results to the central Nagios server. Reason for this is that I'd like to monitor internal systems and servers at customers, but don't want to allow all the traffic passing the firewalls. Ideally I'd like a soft-probe that would be installed and then perform the tests and send back the results (via SSH) to the central Nagios installation. Does anyone know of a product or plug-in that would offer such service? If not Nagios, is there any other monitoring system that does such a thing (ideally open-source)?

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• Ubuntu server: lost prompt on monitor

  - by Richard

  Hello All, I am running Ubuntu 9.04 server edition. I have a monitor plugged into the box for occasional admin tasks. I pulled out a USB disk (without unmounting) and the screen is now full with this message: Buffer I/O error on device sdc1, logical block 7778778 I can't seem to clear the screen or get a prompt back. Doesn't appear to be registering keyboard strokes. The box is still running fine (I can ssh in from elsewhere and evrything is running as normal). Any ideas on how to clear screen and get my prompt back?

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• Special function keys are mixed up on my Macbook Pro

  - by seanieb

  I recently sent my Macbook Pro (late 2008 model) to get a replaced logic board and top cover. When I got it back the Special function keys are mixed up. F3 - mutes sound - it should do expose f4 - decreases volume - it should show the dashboard f5 - increases volume ....etc, ... F11 - expose - it should decrease volume f12 - dashboard - it should increase volume I have checked and made sure that System PreferencesKeyboard"use all F keys as standard function keys" is not selected. And that no accessibility options are switched on either. How do I fix this? or should I bring it back to the repair shop? Thanks

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• Solaris at LISA 2011

  - by dminer

  As is our custom, the Solaris team will be out in force at the USENIX LISA conference; this year it's in Boston so it's sort of a home game for me for a change.  The big event we'll have is Tuesday, December 6, the Oracle Solaris 11 Summit Day.  We'll be covering deployment, ZFS, Networking, Virtualization, Security, Clustering, and how Oracle apps run best on Solaris 11.  We've done this the past couple of years and it's always a very full day.On Wednesday, December 7, we've got a couple of BOF sessions scheduled back-to-back.  At 7:30 we'll have the ever-popular engineering panel, with all of us who are speaking at Tuesday's summit day there for a free-flowing discussion of all things Solaris.  Following that, Bart & I are hosting a second BOF at 9:30 to talk more about deployment for clouds and traditional data centers.Also, on Wednesday and Thursday we'll have a booth at the exhibition where there'll be demos and just a general chance to talk with various Solaris staff from engineering and product management.The conference program looks great and I look forward to seeing you there!

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• Installed ubuntu over windows vista..cant reinstall windows

  - by Marcuz J Hinojoz

  I recently used the "compress hard drive" option within windows. i got the horid "boot mngr is compressed" after the restart. i tried booting my system back to windows vista but it doesnt read the cd that came with my computer. i tried going into system recovery and going back to a previous date but it didnt work. i kept pressing f8 but nothing. i installed ubuntu(the ubuntu cd worked but windows didnt?) i installed ubuntu so i could atleast get in my computer, and i still wasnt able to install windows from there. my hard drive got reformatted to a ext4? and windows cant install because it doesnt read it? im not sure, but its very frustrating. my computer is a gateway gt5668e windows vista home premium with sp1. im a graphic designer and use programs such as photoshop and cinema 4d to do my projects..i have been at a unfortunate halt with my work and i am really bummed out and dont know what to do... any help?

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• Cuda driver, CPU/GPU performances issue

  - by elect

  I implemented a RNS Montgomery exponentiation in Cuda and on cpu for comparison. Everything nice everything fine. It runs on just one SM. However I am going to tell you some strange regression in both cpu/gpu performances. During the devoloping, about two month ago, I was using Cuda 5 preview on Ubuntu 11.04 64b. In this time, I reach the following performances: cpu 460ms gpu 120ms Then one day when I turn on the pc, the graphical environment didnt start. I dont know which was the problem, however I switched to the console and installed again the Cuda driver. At the following boot performances changed: cpu 310ms gpu 80ms I was like Q.Q...uhm ok, nice to see this, but I was wondering how that could be possible However, I went then in holiday for 10 days and I continued developing and optimizing on my notebook (but not the same part of the code, some additional stuff) When I was back, I just updated the source files, and performances came back to 460/120ms.. I couldnt believe it, I tried to install Cuda 5 RC, updating the video driver too... nothing changed... I checked Debug/Release, Cuda computability, but the problem seems being somewhere else.. Looking around the net I found this, I am pretty sure it must have something to do with the driver, because the performance change affected both cpu and gpu Do you have some tips/ideas/suggestions?

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• Preventing item duplication?

  - by PuppyKevin

  For my game, there's two types of items - stackable, and nonstackable. Nonstackable items get assigned a unique ID that stays with it forever. A character ID is assosicated with the item, as is a state (CHANGED, UNCHANGED, NEW, REMOVED). The character ID and state is used for item saving purposes. Stackable items have one unique ID, as in the entire stack has one unique ID. For example: 5 Potions (stacked ontop of each other) has one unique ID. When dropping a nonstackable item, the state gets set to REMOVED, and the unique ID and state don't change. If picked up by another player, the state gets set to NEW, and the character ID gets changed to the new character's ID. When dropping all items in a stack of stackable items (for example, 5 potions out of 5) - it behaves just like a nonstackable item. When dropping some of a stack of stackable items (for example, 3 potions out of 5)... I really have no clue what to do. The 3 dropped potions have the state of REMOVED, but the same unique ID and character ID. If another player picks it up, it has no choice but to obtain a new unique ID, and its state gets changed to NEW and its character ID to the new one. If the dropping player picks it back up, they'd just be readded to the stack. There's two issues with that though. 1. If the player who dropped the 3 potions picks it back up, there's no way to tell if they legitimately dropped the items, or if they're duped items. 2. If another player picks up the 3 potions (assuming they're duped), there's no way to know if they're duped or not. My question is: How can I create a system that detects duplicated items for both nonstackable and stackable items?

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• SugarCRM CE Won't Install on Ubuntu 10.10

  - by Trenton Scott

  I have a fresh copy of Ubuntu 10.10 server with a working LAMP installation. I downloaded SugarCRM and browsed to its directory to open the installer (via Firefox). The installer appears fine, I accept the license agreement, and it proceeds to check file permissions. It advises that several directories need looser permissions (chmod 766), and I adjust them accordingly. After making the changes, I click "recheck" and the page just reloads as blank (white). There are no errors visible, nothing in the server logs (Apache/PHP) and installation cannot continue. I'm able to get back to the installation tool by readjusting permissions back to my default (0755 for directories, 0644 for files). All files/folders are owned by root and the www-data group. Any idea about what's wrong?

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• Why is Windows Explorer not responding?

  - by William Barnes

  I am having the seemingy popular problem with Widows Explorer not responding. I have tried the AUTRUNS and turned off everything recommended. I have run SCANNOW 3 times and it comes back clean. When booting in safe mode it appears to work. I read someplace that the problem could be a service program, but can't remember where I read it or how to do it. Something about turning off all service programs and then turning them back on one at a time. The problem is I don't remember what it said to do. Any and all help is greatly appreciated. as an FYI here is my system stats Sorry I can't access that part of control panel right now because windows explore not responding. I have an HPdesk top with a AMD quad core processor 1.8GB 1.5TB sata drives (a 1TB and a 500GB) Nvidia 8400 graphics card a 2mb internet connetion wireless 2 DBD R?W drives. Any help is greatly apprciated

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• convert outline to text

  - by Pai Gaudêncio

  howdy, how can i convert an outlined text back to editable text in adobe illustrator? thanks.

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• The Start of a Blog

  - by dbradley

  So, here's my new blog up and running, who am I and what am I planning to write here?First off - here's a little about me:I'm a recent graduate from university (coming up to a year ago since I finished) studying Software Engineering on a four year course where the third year was an industrial placement. During the industrial placement I went to work for a company called Adfero in a "Technical Consultant" role as well as a junior "Information Systems Developer". Once I completed my placement I went back to complete my final year but also continued in my developer role 2/3 days a week with the company.Working part time while at uni always seems like a great idea until you get half way through the year. For me the problem was not so much having a lack of time, but rather a lack of interest in the course content having got a chance at working on real projects in a live environment. Most people who have been graduated a little while also find this - when looking back at uni work, it seem to be much more trivial from a problem solving point of view which I found to be true and I found key to uni work to actually be your ability to prove though how you talk about something that you comprehensively understand the basics.After completing uni I then returned full time to Adfero purely in the developer role which is where I've now been for almost a year and have now also taken on the title of "Information Systems Architect" where I'm working on some of the more high level design problems within the products.What I'm wanting to share on this blog is some of the interesting things I've learnt myself over the last year, the things they don't teach you in uni and pretty much anything else I find interesting! My personal favorite areas are text indexing, search and particularly good software engineering design - good design combined with good code makes the first step towards a well-written, maintainable piece of software.Hopefully I'll also be able to share a few of the products I've worked on, the mistake I've made and the software problems I've inherited from previous developers and had to heavily re-factor.

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• Why did the web win the space of remote applications and X not?

  - by Martin Josefsson

  The X Window System is 25 years old, it had it's birthday yesterday (on the 15'th). As you probably are aware of, one of it's most important features is the separation of the server side and the client side in a way that neither Microsoft's, Apples or Wayland's windowing systems have. Back in the days (sorry for the ambiguous phrasing) many believed X would dominate over other ways to make windows because of this separation of server and client, allowing the application to be ran on a server somewhere else while the user clicks and types on her own computer at home. This use obviously still exists, but is marginalized at best. When we write and use programs that run on a server we almost always use the web with it's html/css/js. Why did the web win, and X not? The technologies used for the web (said html/css/js) are a mess. Combined with all the back-end-frameworks (Rails, Django and all) it really is a jungle to navigate thru. Still the web thrives with creativity and progress, while remote X apps do not.

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• Set a row to follow my cursor anywhere in Calc

  - by NoCanDo

  How do I make a whole row follow wherever I am in the Calc document when I scroll down/up? I'm looking for something that keeps a row from moving, or to make it stay put. This is so that when I want to see other rows, this one locked row will stay in place and allow me to refer back to it on screen without having to scroll all the way back up to the top of the document. Normal: Scrolled down: Further scrolled down: You can see the row with the yellow background, (CD-Nr.|Title|Genre|Lang|CD) is following me as I scroll down. How is this done?

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• My iPhone is stuck at screen with USB cable and iTunes logo

  - by alex

  I just tried updating the iPhone's firmware, and things went haywire. iTunes informed the update had failed and linked me to this page. The iPhone is stuck on the image from the top of that page. I held down the sleep and home buttons until it turned off and turned it back on, and then went through the iPhone's 'restore' mode. It then error'd again and I'm stuck back with the logos on the iPhone. Does anyone know how to fix this? Thanks

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• Why does 12.04 try but fail to hibernate, even after I enabled hibernation?

  - by Roger Davis

  Regarding the below (-----) info from another post, my system will try (as is said below) to hibernate, but it won't get all the way there. Hard drive activity stops, but it does not shut down. If I turn the power off, then back on, it will start, but I have to "restore previous session" in the browser and other open apps don't restart, with the accompanying hassle. So because it tries, will the suggested fix then cause it to work correctly, or is the literal "try" not really what he means?!? PLEASE NOTE - this is a desktop system, not a laptop. Before enabling hibernation, please try to test whether it works correctly by running pm-hibernate in a terminal. The system will try to hibernate. If you are able to start the system again then you are more or less safe to add an override. To do so, start editing sudo nano /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla Fill it with this [Re-enable hibernate by default] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes Save by pressing Ctrl-O and exit nano by pressing Ctrl-X Restart and hibernation is back!

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• How do I securely share / allow access to a drive?

  - by sleske

  To simplify backing up a laptop (Windows Vista), I'm planning on sharing its C: drive (with password protection) and using that to back it up from another computer. What are the security implications of this? If I share C: with a reasonable password, how big is the risk of compromise if the system is e.g. inadvertently used on a public WLAN or similar? Background: I'm planning to use [Areca Backup][1] to back up two systems (Windows XP and Vista). My current plan is to install Areca on the XP box, and share the Vista system's C: as a shared folder, so the XP system can read it. Then I can set up the drive as a network drive and have Areca read it like a local drive. Of course, if you can think of a more elegant way of doing this, I'm open to suggestions.

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• How can I switch Linux running OS from disk to running from RAM without restarting?

  - by vfclists

  Is it possible to switch to running Linux from RAM or RAM disk after starting starting initially from disk? eg. You need to make an image of your hard disk, FTP it to a remote location, some time later you want the image back, so you start the system from disk as usual, restore the image you FTP'd from the remote location back into place. More like a CloneZilla backup and restore, without booting the server from CD or USB disk, but starting from the normal hard disk? Notes on environment I should have mentioned it earlier. It is a remotely hosted VM where I cannot boot into a recovery console mode or do a netinstall. It will always boot onto the same disk. Which means that if there is some serious corruption I can't repair it offline, which is why being able to ftp a previously saved backup into place is so important

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• Files slow to save sometimes after Ubuntu upgrade

  - by Matchu

  I haven't quite been able to track down why this happens sometimes in Ubuntu 10.04 and not other times. I'll go into gedit or OpenOffice.org and try to save files, and, during some sessions, it will take up to 10 seconds to save the file, sometimes causing the program to become unresponsive. But during these same sessions, the files sometimes save instantly. This didn't start happening until after the 10.04 (Lucid) upgrade. I suspect that something is reading all the changes I make, or that there's some other big file action going on, or something like that. I disabled Tracker a while back, before the upgrade, and don't see it under the settings - could it be back under a different name under Lucid? You probably don't already know the answer, but how can I go about finding the cause of this problem?

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• Xorg becomes unkillable at 3AM

  - by chew socks

  Most nights, some time in the hour of 3AM my xorg process will increase to 100% cpu and gpu load will also increase to 100%. The process also becomes unkillable. I cannot sudo kill -9 it or get back control with sudo service lightdm restart. I also cannot switch to to a tty screen with ctrl + alt + f1. To reboot I have to log in with ssh, but this is not perfect because if I reboot while it is doing this my ZFS pool will fail to mount when it comes back up ( that is where my /home is ). Does anyone have any ideas as to why I can't stop and restart xorg, or even better, know why this is happening? Thanks NOTE: For anyone who comes looking for the same problem. I disabled catalyst AI and made it through the night. I've been up for 1 day 3 hours now. My record for this month is 2 days and 19 hours without a problem. My all time record is 6 days without a crash. I'll post here if it crashes again or I'm able to set a new record.

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• Storing data offline with javascript

  - by Walker

  My question is about storing data offline and potentially whether I will need to bring in an outside programmer or could this be learned within a few weeks? The website I am working on will have an interface where users will login and go through a series of quizzes in the form of checkbox, drop down menus, and others. Each page/quiz area could have 20-100 total checkboxes in a series of 3-5 rows because of the comprehensive nature of course. This I can do - I know how to code the quiz and return a correct or incorrect answer based on each individual checkbox and present a cumulative score (ie: you got 57% correct). The issue lies in the fact that I would like to save the users results and keep them informed of their progress. When they complete all of the quizzes, I would like to have a visual output of their performance in each area. Storing the output from their results offline is where I think I may run into a problem with my lack of coding experience. I would also like to have a sidebar with their progress of each section (10-15) with a green percentage completion bar or a % correct which would draw from this. I have never had to code something that stores information like this offline - so back to my question - would it be better to learn the language needed or bring in a coder/developer for the back end stuff.

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