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• Resize hard drive partition to make more space for /var

  - by user3357381

  I am running out of space in the /var partition. I have plenty of space in my /home partition. How do I shrink the /home partition to make more space for the /var partition? I have read some blogs that say to use the GParted Live CD. As a new user, I'm not quite sure if this is the ideal route. What is the best way to create more space for /var ? Output of df -h : Filesystem Size Used Avail Use% Mounted on /dev/sda2 19G 7.1G 11G 41% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 7.9G 8.0K 7.9G 1% /dev tmpfs 1.6G 1.5M 1.6G 1% /run none 5.0M 0 5.0M 0% /run/lock none 7.9G 624K 7.9G 1% /run/shm none 100M 60K 100M 1% /run/user /dev/sda4 454M 75M 352M 18% /boot /dev/sda5 2.3G 2.1G 36M 99% /var /dev/sda3 178G 1.3G 168G 1% /home /dev/sda6 2.8G 5.8M 2.6G 1% /tmp /dev/sdb1 3.7T 401G 3.3T 11% /hdd

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• Edubuntu boot problem on dual boot PC

  - by trptplyr

  When booting Edubuntu on a dual boot PC with Windows 7, the last message that I get is "Restoring resolver state" [Ok]. I then press the Enter key, some other messages come up and go away too quickly to notice what they say, and then the system shuts down. Windows 7 works fine. My system is an older Dell Inspiron 9400 laptop with 3Gb usable memory. This all started happening after attempting to upgrade to the next version of Edubuntu, but was not allowed to because I didn't have enough space in my partition to allow for it. I'm unsure whether that has anything to do with the problem.

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• Can I share files via SAMBA while in root?

  - by user212501

  I have a couple of things going on here. I am currently running UBUNTU 10.04 in root via "STARTX" command. The reason being is that I keep getting the "LOW GRAPHICS ERROR CODE" and I cant not start up normally. Now I have researched & researched the error. I mean I got my SUDO on........, o.k. I'm really done trying to fix this error. I just wanna re-install. (funny thing. This startx command is how Im using the laptop now, so I know that it is a software issue) So here's my dilemma that is inside another dilemma. I have about 30gigs of info that I need to get off the laptop before I can re-install. Any thoughts What say you? LOTR LOL

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• App for finding icons easily?

  - by artfulrobot

  Occasionally I need to use a custom icon for something - a launcher created with alacarte, a custom .desktop file, or just a particular folder viewed in Nautilus. I know there are LOADS of cool icons installed on my system at /usr/share/icons but browsing them is really awkward. Everything is scattered around, duplicated in different sizes (or symlinked to .svg) etc. So, say I'm looking for a text file icon, or a purple folder or such, searching is a faff, and then when you do find results you need to work out what the best quality one is. Made me think that someone might have written an app for this?

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• Figuring out the Call chain

  - by BDotA

  Let's say I have an assemblyA that has a method which creates an instance of assemblyB and calls its MethodFoo(). Now assemblyB also creates an instance of assemblyC and calls MethodFoo(). So no matter if I start with assemblyB in the code flow or with assemlyA, at the end we are calling that MethodFoo of AssemblyC(). My question is when I am in the MethodFoo() how can I know who has called me? Has it been a call originally from assemblyA or was it from assemlyB? Is there any design pattern or a good OO way of solving this?

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• Should I use a unit testing framework to validate XML documents?

  - by christofr

  From http://www.w3.org/XML/Schema: [XML Schemas] provide a means for defining the structure, content and semantics of XML documents. I'm using an XML Schema (XSD) to validate several large XML documents. While I'm finding plenty of support within XSD for checking the structure of my documents, there are no procedural if/else features that allow me to say, for instance, If Country is USA, then Zipcode cannot be empty. I'm comfortable using unit testing frameworks, and could quite happily use a framework to test content integrity. Am I asking for trouble doing it this way, rather than an alternative approach? Has anybody tried this with good / bad results? -- Edit: I didn't include this information to keep it technology agnostic, but I would be using C# / Linq / xUnit for deserialization / testing.

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• How to get experience in large scale databases?

  - by Justin

  I have written applications that are very small scale and the code I write works fine for them. But I have often wondered how the server side code I write would scale up from 100s of queries per day to millions. Also when looking at possible jobs/projects, people are often looking for developers with experience in this sort of high traffic database design so I would at least like to be able to say, I havent gotten to work on a project that was this popular, but I at least have tried to simulate it. Are there tools or frameworks that can generate a lot of traffic or at least simulate what would happen with traffic on different orders of magnitude so I could get some practice writing optimized code for higher traffic applicaitons?

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• How to balance programming projects between feasibility and usefulness

  - by tyjkenn

  I've become fairly competent as a programmer, but I would not say I am a master. I work independently, most as a hobby, although I have done some freelance PHP work. I tend to find myself dabbling in a lot of things: Java Android SDK, Arduino, game scripting, Lua, etc. I've reached the point where I want to start a real software project, but cannot think of a small enough project that allows me enough practice, while still being able to publish a decent piece of software in a reasonable amount of time, and build up a portfolio. More specifically, I was looking at Ubuntu development, in Python, using the Quickly toolset, which includes the PyGTK libraries. So the question is, what is the best way to come up with a small project that is still useful, as a starting point to a software development career?

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• A Better Way To Extract Date From DateTime Columns [SQL Server]

  - by Gopinath

  Quite a long ago I wrote about a SQL Server programming tip on how to extract date part from a DATETIME column. The post discusses about using of T SQL function convert() to get date part. One of the readers of the post, tipped me about a better way of extracting date part and here is the SQL query he sent to us SELECT DateAdd(day, DateDiff(day, 0, getdate()), 0); In clean way this query trims off time part from the DATETIME value. I rate this solution better than the one I wrote long ago as this one does not depend on any string operations. According the commenter, this method is faster compared to the other. What do you say? Thanks Yamo This article titled,A Better Way To Extract Date From DateTime Columns [SQL Server], was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Calendar icon in unity shows wrong date

  - by felix

  There is a column of icons in unity on the far left and one of them has the number "31" in big numerals. If you mouse over it it says "Google Calendar" and if you click on it you get google calendar which of course shows the correct date. Today is November 3. Shouldn't it say "3" instead? If I type "date" from the command line I get Sun Nov 3 21:19:37 GMT 2013 I see this was fixed for Chrome at least in 2011 http://gmailblog.blogspot.co.uk/2011/04/5-years-of-google-calendar-and-new.html .

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• Is it a good idea to make a game for one aspect ratio and arbitrary screen resolution?

  - by Mimars

  After several very small games I have decided to make something more standalone (2D) and playable. However, I have met the problem of every game that is going to be played in more screen resolutions. Basically, after some research I see that there are several solutions. This seems to be the simplest one: Let's say I define a constant aspect ratio for the game (16:9) and the whole game will be created for a resolution 1680 x 1050. The game will be rendered in this resolution and then I will be able to scale the render to match the player's display resolution. Therefore the game might be playable on almost any resolution, while it would keep the aspect ratio. So, if the game was run on 4:3 display, the top and the bottom of the display would be filled with black color. It seems easy, but my question is - Is this a good approach for a simple game? The game will be simple, but I want to maintain high quality.

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• Application for taking pretty screenshots (like OS X does)

  - by Oli

  I've been building a website for a guy who uses Mac OS X and occasionally he sends me screenshots of bugs. They come out looking like this: This is fairly typical of Mac screenshots. You get the window decorations, the shadow from the window and a white or transparent background (not the desktop wallpaper -- I've checked). Compare this to an Ubuntu window-shot (Alt+Print screen): It's impossible to keep a straight face and say the Ubuntu one anywhere near as elegant. My question is: Is there an application that can do this in Ubuntu? Edit: Follow up: Is there an application that can do this in one move? Shutter is pretty good but running the plugin for every screenshot is pretty tiresome as it doesn't seem to remember my preference (I want south-shadow and that requires selecting south, then clicking refresh, then save) and it's more clicks than I'd like. Is there a simple way of telling shutter I want south-shadow for all screenshots (except entire desktop and area-selection)?

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• How can i get ubuntu to run smoother?

  - by Knuckles

  I am relatively new to ubuntu [I've used it before and loved it but one day i just randomly couldn't connect to the internet anymore so i switched back to windows... also netflix doesn't work in ubuntu...] and I've noticed that when i used it before everything ran very smoothly and the window animations and stuff like that were just beautiful. now though, everything is choppy and just ugly really. I wanna say its because i was using an older kernel but i really don't know. Anyway, i guess my point is, How can i get it to look pretty again? i really do wish i could be more descriptive but... yeah... I'm on Maverick btw. if anymore information is required i will happily oblige, just let me know.

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• What am I risking if I don't update my SDK/JDK and bundled runtime/JRE every time there's a security update?

  - by rob

  It seems like there's a new major security hole patched in Java every other week, and I would assume the same goes for other development platforms. After years of frustration trying to get customers to install and configure a compatible JRE on their systems, we started bundling one with our software. (By bundling, I mean we extract a copy of the JRE in our installation directory--we don't install the JRE and configure it as the system default.) The problem is, it's a hassle having to keep that JRE up-to-date because first we have to retest everything to make sure the update didn't break anything (it has broken some of our third-party dependencies in the past). How seriously, if at all, are we putting our customers at risk if we don't update our SDK/JDK and the runtime/JRE that we bundle with our product every time there's a security update? Is it reasonable to just update on a periodic schedule--say, once every 6 months or so?

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• What resources about business should an internal IT department programmer be familiar with

  - by Badger

  I am developer / analyst in an internal IT department at a medium sized business. I have to deal with business people all the time and many of the things I create can have profound impacts on the business. I am starting to regret not taking any business classes in college because I don't understand the first thing about running a business so I don't always understand what people are wanting, the best I can do is "think through it". Does anyone have suggested methods of learning this stuff, maybe some resources. And please don't just say to ask people who work here. I have tried that before and I get no where.

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• MEF (Microsoft Extensibility Framework) made simple (ish)

  Microsoft Extensibility Framework or MEF is one of the great features in Silverlight, designed around making Silverlight applications more extensible generally and provides a much more complete story for the separation of concerns. MEF then begs the question 'Why we care?' and 'What can MEF really do?' and we will address that here.Let us talk about a real world example for a moment.Say you are a vertical selling corporation of some kind, meaning that you sell to companies that do similar things....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Pending and Approval process

  - by zen

  So let's say I have a DB table with 8 columns, one is a unique auto-incrementing used as ID. So I have a page that pulls in the info for each row based on query string ID. I want to give my users the ability to propose changes. Kinda like a wiki setup. So I was thinking I should just have another duplicate table or maybe database altogether (without the auto-incrementing column and maybe with a date edited column) that keeps all proposed changes in queue and then when I approve them, the script can move the row from the proposed DB to the real DB. Does this sound good or is there a better process for this?

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• What's the point of Rabbit MQ? [duplicate]

  - by bad_boy

  This question already has an answer here: When to use Advanced Message Queuing Protocol like RabbitMQ? [closed] 2 answers First of all, let me say, I have no problem following tutorials. The problem is that I don't understand why even Rabbit MQ is ever needed. And there's no such explanation on tutorials - they only show what to do and how to use, but not when its usage is the case. Can you explain this? Why would you want to use Rabbit MQ? To solve what problem?

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• Spawning bullets on command in Box2D

  - by recharge330

  I'm making a simple bullet hell game but I can't figure out how to get my character to shoot. Lets say I have bulletBody and shipBody, how would I continually spawn bulletBodies using the shipBody coordinates. I've tried a function that uses an array of b2bodies and just assigns them the bodydef and fixture but that causes the game to crash. C++ sample code would be best but any help is appreciated. EDIT: It looks like any reference to my b2World in a function will cause the game to crash. How do I declare the bodies without using a b2World as an argument in the function.

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• Reset Windows share password after 'Remember forever'

  - by timmit

  I've been happily connecting to a Windows share from my 14.04 machine. When I first entered the password for the share I chose to have it remembered forever. Yesterday I changed the password on the Windows machine, today I can't access the share... My searches for a solution have been in vain, most suggestions say that there is an entry in the Password & Keys (seahorse) app that should be deleted, this doesn't exist for me. I even ran seahorse as the root user to see if the key was hidden away in there, but no luck. Is there anywhere else I should be looking? Shouldn't the Nautilus app be prompting me to update my password in this scenario?

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• Vertex data split into separate buffers or one one structure?

  - by kiba2

  Is it better to have all vertex data in one structure like this: class MyVertex { int x,y,z; int u,v; int normalx, normaly, normalz; } Or to have each component (location, normal, texture coordinates) in separate arrays/buffers? To me it always seemed logical to keep the data grouped together in one structure because they'd always be the same for each instance of a shared vertex and that seems to be true for things like character models (ex: the normal should be an average of adjacent normals for smooth lighting). One instance where this doesn't seem to work is other kinds of meshes like say a cube where the texture coordinates for each may be the same but that causes them to be different where the vertices are shared. Does everybody normally keep them separate? Won't this make them less space efficient if there needs to be an instance of texture coordinates and normals for each triangle vertex (They won't be indexed)? Can OpenGL even handle this mixing of indexed (for location) vs non-indexed buffers in the same VBO?

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• Get the Windows 7 Start Menu Back in Windows 8 with Classic Shell

  - by deadlydog

  I just thought I’d give readers a heads up that you can use Classic Shell to get the old Windows 7 style of start menu back instead of using the new crappy Windows 8 metro start screen; plus it’s free and open source .  You can still access the metro start screen with Shift+WindowsKey or Shift clicking the start menu button.  This program also defaults to showing the desktop on startup instead of the metro start screen (but that can be disabled), and is super configurable and has tons of options to tweak it just the way you want if you are picky like me   The only thing I would say is when installing the app, only install the Classic Start Menu; you don’t need the other ones. You’re welcome, and happy coding!

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• What is a good way to comment if-else-clauses?

  - by acme

  Whenever I'm writing a typical if-else-construct in any language I wonder what would be the best way (in terms of readability and overview) to add comments to it. Especially when commenting the else clause the comments always feel out-of-place for me. Say we have a construct like this (examples are written down in PHP): if ($big == true) { bigMagic(); } else { smallMagic() } I could comment it like this: // check, what kind of magic should happen if ($big == true) { // do some big magic stuff bigMagic(); } else { // small magic is enough smallMagic() } or // check, what kind of magic should happen // do some big magic stuff if ($big == true) { bigMagic(); } // small magic is enough else { smallMagic() } or // check, what kind of magic should happen // if: do some big magic stuff // else: small magic is enough if ($big == true) { bigMagic(); } else { smallMagic() } What are your best-practice examples for commenting this?

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• seo value of duplicating content externally

  - by Don

  I run a website that includes a blog which was hand-coded by myself and is hosted on the same domain. My partner in this endeavour thinks it would be a good idea to open up a blogger/wordpress blog and duplicate the on-site blog on this off-site blog. AFAIK the main reason for doing this is the SEO benefits of the inbound links that this off-site blog will create. I think this is a bad idea, because: Effectively what we're doing is creating a (very small scale) link farm We're more likely to be punished than rewarded (in SEO terms) for duplicating our content across domains This introduces a problem of synchronising our content across domains. For example, if a blog post is edited on the on-site blog, then ideally the off-site blog should be similarly updated. I know very little about SEO, so would be interested to hear what more informed readers have to say.

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• which Project hosting service (Like google code, github) you will prefer to use? And Why?

  - by MobileDev123

  I am using to study (and at some point of time copy the desired module of) the code from these two sites (Google Code and Github). There is sourceforge too, I have some code, say some library that I want to share with the community, and I am to decide the hosting site. And before I decide I want to have opinions from this community. Which is your favorite Project hosting site or service? And why? There is one point where github can win over google code (may be I am wrong here), Github can let you forge whole project with a zip or tar file, but to do the same in google code we have to upload the zip file explicitly and put it in downloads.... Thanks

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