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• Deploying ASP.Net MVC application

  - by a_m0d

  I've recently reached the stage where an ASP.net MVC application I am developing is ready to be deployed to the production server. I've worked out how to publish the application - I've got all the files on the server, and can access them over the internet. However, I can't work out how to deploy my database. The server has the SQL Server Management Studio Express installed, as the database used is a SQL Server Express database. I have the server instance up and running - I just don't know how to add the tables, etc. to the database. I have created the "CREATE TABLE" scripts on the development machine, but as far as I can see, Management Studio does not provide any way to actually run these scripts. I have looked through all the menu items that I could see, and none of them worked. Even using the "Create new query..." option and pasting the script in didn't work. When I try "File-Open..." and select a script to run, set the correct database from the dropdown list on the toolbar, and then execute the script, it complains about not finding the database file (even when I set the USE [...] statement to the correct path. Deleting the USE [...] statement, the script complains that it can't find the [dbo].[Invoices] object; however, it shouldn't be able to find it, because its trying to create it! tl;dr: What's the best way to make sure that the database on the production machine matches the database on my development machine?

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• lots of backbone views - performance issues?

  - by ksol

  tl;dr: I wonder if having lots (100+ for the moment, potentially up to 1000/2000 or more) of backbone views (as a cell of a table) is too heavy or not The project I'm working on revolves around a planning view. There one row per user that covers 6 hours of a day, each hour splitted in 4 slots of 15mn. This planning is used to add "reservations" when clicking on a slot, and should handle hovering of the correct slots, and also handle when it is NOT possible to make a reservation - ie. prevent user click on an "unavailable" slot. There is many reasons why a slot can't be clicked on: the user is not available at this time, or the user is in a reservation; or the app needs to "force" a delay slot between two reservations. Reservations (a div) are rendered in a slot (a cell of a table), and by toying with dimensions, hovers the right number of slots. All this screen is handled with backbone. So For each slot I'm hovering on, I need to check wether I can do a reservation here or not. As of this moment, I use this by toying with the data attributes on the slots : when a reservation object is added, the slots covered are "enhanced with (among others) the reservation object (the backbone view object). But in some cases I don't quite have a grasp on now, it mixes up, and when the reservation view is removed, the slots are not "cleaned up" : the previous class is not reset correctly. It is probably something I've done wrong or badly, but this is only going to get heavier; I think I should use another class of Backbone views here, but I'm afraid the number of slots and thereof of views objects will be high and cause performance issue. I don't know mush about js perf so I'd like to have some feedback before jumping on that train. Any other advice on how to do this would be quite welcomed too. Thanks for your time. If this is not clear enough, tell me, I'll try and rephrase it.

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• Programming style question on how to code functions

  - by shawnjan

  Hey all! So, I was just coding a bit today, and I realized that I don't have much consistency when it comes to a coding style when programming functions. One of my main concerns is whether or not its proper to code it so that you check that the input of the user is valid OUTSIDE of the function, or just throw the values passed by the user into the function and check if the values are valid in there. Let me sketch an example: I have a function that lists hosts based on an environment, and I want to be able to split the environment into chunks of hosts. So an example of the usage is this: listhosts -e testenv -s 2 1 This will get all the hosts from the "testenv", split it up into two parts, and it is displaying part one. In my code, I have a function that you pass it in a list, and it returns a list of lists based on you parameters for splitting. BUT, before I pass it a list, I first verify the parameters in my MAIN during the getops process, so in the main I check to make sure there are no negatives passed by the user, I make sure the user didnt request to split into say, 4 parts, but asking to display part 5 (which would not be valid), etc. tl;dr: Would you check the validity of a users input the flow of you're MAIN class, or would you do a check in your function itself, and either return a valid response in the case of valid input, or return NULL in the case of invalid input? Obviously both methods work, I'm just interested to hear from experts as to which approach is better :) Thanks for any comments and suggestions you guys have!

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• Low-Hanging Fruit: Obfuscating non-critical values in JavaScript

  - by Piskvor

  I'm making an in-browser game of the type "guess what place/monument/etc. is in this satellite/aerial view", using Google Maps JS API v3. However, I need to protect against cheaters - you have to pass a google.maps.LatLng and a zoom level to the map constructor, which means a cheating user only needs to view source to get to this data. I am already unsetting every value I possibly can without breaking the map (such as center and the manipulation functions like setZoom()), and initializing the map in an anonymous function (so the object is not visible in global namespace). Now, this is of course in-browser, client-side, untrusted JavaScript; I've read much of the obfuscation tag and I'm not trying to make the script bullet-proof (it's just a game, after all). I only need to make the obfuscation reasonably hard against the 1337 Java5kryp7 haxz0rz - "kid sister encryption", as Bruce Schneier puts it. Anything harder than base64 encoding would deter most cheaters by eliminating the lowest-hanging fruit - if the cheater is smart and determined enough to use a JS debugger, he can bypass anything I can do (as I need to pass the value to Google Maps API in plaintext), but that's unlikely to happen on a mass scale (there will also be other, not-code-related ways to prevent cheating). I've tried various minimizers and obfuscators, but those will mostly deal with code - the values are still shown verbatim. TL;DR: I need to obfuscate three values in JavaScript. I'm not looking for bullet-proof armor, just a sneeze-guard. What should I use?

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• asses resouces from another apk for widget(like theme apk)

  - by Diljeet

  asses resouces from another apk for widget(like theme apk) Hello i made a theme with drawables and strings, i can access the theme's resources by following commands String packagename="com....."; Resources res = context.getPackageManager().getResourcesForApplication(packagename); int strid = res.getIdentifier(packagename+":string/"+name, "string", packagename); int drawableid = res.getIdentifier(packagename+":drawable/"+name, "drawable", packagename); String name = res.getString(resid); Bitmap bmp = BitmapFactory.decodeResource(res, resid); //or Drawable dr=res.getDrawable(resid); I can get the drawables, but i don't know how to set the drawables in xml to a widget. I only can set setImageViewResource(int viewid, int resId); So i am asking that how to access xml resources from another apk and set widget drawables from it. I want to access a resource like this from another theme apk, but i can only access the drawable(so can't use it for widgets) <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/wplayh" /> <item android:drawable="@drawable/wplay" /> </selector>

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• How To Create a Flexible Plug-In Architecture?

  - by justkt

  A repeating theme in my development work has been the use of or creation of an in-house plug-in architecture. I've seen it approached many ways - configuration files (XML, .conf, and so on), inheritance frameworks, database information, libraries, and others. In my experience: A database isn't a great place to store your configuration information, especially co-mingled with data Attempting this with an inheritance hierarchy requires knowledge about the plug-ins to be coded in, meaning the plug-in architecture isn't all that dynamic Configuration files work well for providing simple information, but can't handle more complex behaviors Libraries seem to work well, but the one-way dependencies have to be carefully created. As I seek to learn from the various architectures I've worked with, I'm also looking to the community for suggestions. How have you implemented a solid plug-in architecture? What was your worst failure (or the worst failure you've seen)? What would you do if you were going to implement a new plug-in architecture? What SDK or open source project that you've worked with has the best example of a good architecture? A few examples I've been finding on my own: Perl's Module::Plugable An SO question with a list for Java (including Sever Provider Interfaces) An SO question for C++ pointing to a Dr. Dobbs article These examples seem to play to various language strengths. Is a good plugin architecture necessarily tied to the language? Is it best to use tools to create a plugin architecture, or to do it on one's own following models?

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• node.js beginner tutorials?

  - by TreyK

  Hey all, I'm working on creating my first real node.js http server, and I'm sort of drowning in it. As a good teacher of mine always said, "I'll just shove you in the water for now, and then I'll show you how to swim." Fortunately, she wasn't a swimming instructor, but it's a good analogy nonetheless. I feel like I've jumped into node.js and I've only found a ping pong ball to help, that is to say, most of the tutorials I've read stop shortly after the "Hello World" example and I've mostly been trying to make sense of copied and pasted code (or they assume I have knowledge of lower level HTTP and webserver concepts that have been done for me as an Apache/PHP developer). I have experience in both client-side Javascript and PHP, but node seems to be a beast all of its own. I don't quite have the low-level knowledge that seems necessary for creating a node server, and connect, which seems to be a nice module for simplifying things, seems quite sparsely explained, even in the docs on its Git. Where could I find some tutorials to help me in this situation? TL;DR - Are there any tutorials for node.js that go beyond "Hello World" but don't require much low-level knowledge? Or any tutorials that explain lower-level HTTP and webserver concepts that I would need to effectively create a node HTTP server? Thanks for any help. -Trey

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• jQuery - Creating a dynamic content loader using $.get()

  - by Kenny Bones

  Hello everybody! (hello dr.Nick) :) So I posted a question yesterday about a content loader plugin for jQuery I thought I'd use, but didn't get it to work. http://stackoverflow.com/questions/2469291/jquery-could-use-a-little-help-with-a-content-loader Although it works now, I see some disadvantages to it. It requires heaploads of files where the content is in. Since the code essentially picks up the url in the href link and searches that file for a div called #content What I would really like to do is to collect all of these files into a single file and give each div/container it's unique ID and just pick up the content from those. So i won't need so many separate files laying around. Nick Craver thought I should use $.get()instead since it's got a descent callback. But I'm not that strong in js at all.. And I don't even know what this means. I'm basically used to Visual Basic and passing of arguments, storing in txt files etc. Which is really not suitable for this purpose. So what's the "normal" way of doing things like this? I'm pretty sure I'm not the only one who's thought of this right? I basically want to get content from a single php file that contains alot of divs with unique IDs. And without much hassle, fade out the existing content in my main page, pick up the contents from the other file and fade it into my main page.

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• C# class can not disguise to be another class because GetType method cannot be override

  - by zinking

  there is a statement in the CLR via C# saying in C#, one class cannot disguise to be another, because GetType is virutal and thus it cannot be override but I think in C# we can still hide the parent implementation of GetType. I must missed something if I hide the base GetType implementation then I can disguise my class to be another class, is that correct? The key here is not whether GetType is virutal or not, the question is can we disguise one class to be another in C# Following is the NO.4 answer from the possible duplicate, so My question is more on this. is this kind of disguise possible, if so, how can we say that we can prevent class type disguise in C# ? regardless of the GetType is virtual or not While its true that you cannot override the object.GetType() method, you can use "new" to overload it completely, thereby spoofing another known type. This is interesting, however, I haven't figured out how to create an instance of the "Type" object from scratch, so the example below pretends to be another type. public class NotAString { private string m_RealString = string.Empty; public new Type GetType() { return m_RealString.GetType(); } } After creating an instance of this, (new NotAString()).GetType(), will indeed return the type for a string. share|edit|flag answered Mar 15 at 18:39 Dr Snooze 213 By almost anything that looks at GetType has an instance of object, or at the very least some base type that they control or can reason about. If you already have an instance of the most derived type then there is no need to call GetType on it. The point is as long as someone uses GetType on an object they can be sure it's the system's implementation, not any other custom definition. – Servy Mar 15 at 18:54 add comment

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• Shrinking the transaction log of a mirrored SQL Server 2005 database

  - by Peter Di Cecco

  I've been looking all over the internet and I can't find an acceptable solution to my problem, I'm wondering if there even is a solution without a compromise... I'm not a DBA, but I'm a one man team working on a huge web site with no extra funding for extra bodies, so I'm doing the best I can. Our backup plan sucks, and I'm having a really hard time improving it. Currently, there are two servers running SQL Server 2005. I have a mirrored database (no witness) that seems to be working well. I do a full backup at noon and at midnight. These get backed up to tape by our service provider nightly, and I burn the backup files to dvd weekly to keep old records on hand. Eventually I'd like to switch to log shipping, since mirroring seems kinda pointless without a witness server. The issue is that the transaction log is growing non-stop. From the research I've done, it seems that I can't truncate a log file of a mirrored database. So how do I stop the file from growing!? Based on this web page, I tried this: USE dbname GO CHECKPOINT GO BACKUP LOG dbname TO DISK='NULL' WITH NOFORMAT, INIT, NAME = N'dbnameLog Backup', SKIP, NOREWIND, NOUNLOAD GO DBCC SHRINKFILE('dbname_Log', 2048) GO But that didn't work. Everything else I've found says I need to disable the mirror before running the backup log command in order for it to work. My Question (TL;DR) How can I shrink my transaction log file without disabling the mirror?

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• OpenMP in Fortran

  - by user345293

  I very rarely use fortran, however I have been tasked with taking legacy code rewriting it to run in parallel. I'm using gfortran for my compiler choice. I found some excellent resources at https://computing.llnl.gov/tutorials/openMP/ as well as a few others. My problem is this, before I add any OpenMP directives, if I simply compile the legacy program: gfortran Example1.F90 -o Example1 everything works, but turning on the openmp compiler option even without adding directives: gfortran -openmp Example1.F90 -o Example1 ends up with a Segmentation fault when I run the legacy program. Using smaller test programs that I wrote, I've successfully compiled other programs with -openmp that run on multiple threads, but I'm rather at a loss why enabling the option alone and no directives is resulting in a seg fault. I apologize if my question is rather simple. I could post code but it is rather long. It faults as I assign initial values: REAL, DIMENSION(da,da) :: uconsold REAL, DIMENSION(da,da,dr,dk) :: uconsolde ... uconsold=0.0 uconsolde=0.0 The first assignment to "uconsold" works fine, the second seems to be the source of the fault as when I comment the line out the next several lines execute merrily until "uconsolde" is used again. Thank you for any help in this matter.

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• 3D and AI basics. The foundation before the coding.

  - by Allan

  Hi, everyone. (If you have the time and patience:) I've recently made the decision to study programming seriously and I'm about to order TAOCP and Concrete Mathematics to begin my studies (please don't get caught up on this). I'm very much interested in learning and understanding how 3D works but I'm aware that if I plan to do it right there's still a long walk before I get to actually play with 3D coding. Now to the question.. (tl;dr) Excluding programming itself, what disciplines do I have to be familiar with to code 3D? What kinds of mathematics? Physics? What else? What books do you recommend on such subjects? Now read it all again but replacing "3D" with "AI". Please don't recommend computer-specific books. The question is about the foundation to be learned before using the machine. Also, if possible, please keep the list brief; I plan to order one book on each subject but no more than that for now. Excuse me for any English mistakes, it's not my first language. Thank you.

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• Getting a "for each" loop in Java to run in different order everytime

  - by R Stokes

  Hi, Basically my problem is that I'm trying to write a method that finds a random path in a graph of strings, which takes as it's parameters a start string, an integer length and a Vector of strings that will store the path. I'm attempting to do this by first adding the starting string to our blank vector, recursing through its neighbors until the vector's length (not including the start node) is the same as the integer length specified in the parameters. I've provided my code so far here: public Vector<String> findRandomPathFrom(String n, int len, Vector<String> randomPath){ randomPath.add(n); if (randomPath.size() == len + 1) return randomPath; for (String m : this.neighbours(n)){ if (!randomPath.contains(m) && findRandomPathFrom(m, len, randomPath) != null) return randomPath; } path.setSize(path.size() - 1); return null; } It seems to be working fine, returning a path with exactly the number of strings specified after the given start string. However, for any given starting string it generates the EXACT same path everytime, which kind of defeats the purpose of it being a random path generator. I'm guessing this problem is related to my "for each" loop, which loops through all the neighbouring strings of your current string. It seems to just be going with the first string in the neighbours vector every single time. Can anyone help me fix this problem so that it will choose a random neighbour instead of going in order? tl;dr - Any way of getting a "for each" loop in java to process a collection in a random order as oppoosed to start-to-finsih? Thanks in advance

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• [javascript] Populating jsTree based on XML data uploaded to server folder

  - by PFM

  tl:dr How can I populate jsTree based on a folder location instead of an exact XML url? I'm looking for a little direction on this project. Currently I am trying to copy file structures of hard drives as XML files and recreate them using jsTree on the webserver for a completely independent version of the file structure. I have some python script that outputs XML files that are formed to jsTree and automatically uploads to a folder on the server. The problem is now I am a little lost because I have to manually enter each XML file into jsTree code for it to display so I have multiple entries like this: $("#tree1") .jstree({ "plugins" : [ "themes", "xml_data", "ui", "search", "types" ], "xml_data" : { "ajax" : { "url" : "./XML_DATA/DRIVE1.xml" }, "xsl" : "nest" }, I see in the documentation that instead of populated by the direct file the folders are populated by "server.php" but no where in the php code does it point to any directories or files. After considering the problem I thought of a few solutions and could use some advice on them: Should I be trying to write php code to automatically look through my XML_DATA folder to upload each XML file? Should I just upload all the XML to mySQL and populate my tree based on that? Should the javascript be the code looking through the server's folder for XML files? All the XML is formed the same way but the number of XML files on the server will increase and will have to be refreshed as well as they will be overwritten with changes. Any direction would be appreciated, thanks.

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• Regularly update database without browser/user

  - by Chris M

  I currently have a MySQL database which I was hoping to use to store regularly updated data from a temperature sensor connected to the internet. I currently have a page that, when opened, will grab the current temperature and the current timestamp and add it as an entry to the database, but I was looking for a way to do that without me refreshing the page every 5 seconds. Detail: The data comes from an Arduino Ethernet, posted to an IP address. Currently, I'm using cURL to grab the data from the IP, add a timestamp and save it to the DB. Obviously only updates when the page is refreshed (it uses PHP). Here is a live feed of the data - http://wetdreams.org.uk/ChrisProject/UI/live_graph_two.html TL;DR - Basically I need a middle man to grab the data from the IP and post it to a MySQL Edit: Thanks for all the advice. There might be a little bit of confusion, I'm looking for a solution that (ideally) doesn't require a computer to be on at all (other than the Server containing Database). Since I'm looking to store data over long periods of time (weeks), I'd like to set it up and leave a script running on the server (or Arduino) that gets the temp and posts it to the Database. In my head I would like to have a page on the server that automatically (without any browser open, or any other prompting other than a timer) calls a PHP script. Hope that clears things up!

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• Delete on a very deep tree

  - by Kathoz

  I am building a suffix trie (unfortunately, no time to properly implement a suffix tree) for a 10 character set. The strings I wish to parse are going to be rather long (up to 1M characters). The tree is constructed without any problems, however, I run into some when I try to free the memory after being done with it. In particularly, if I set up my constructor and destructor to be as such (where CNode.child is a pointer to an array of 10 pointers to other CNodes, and count is a simple unsigned int): CNode::CNode(){ count = 0; child = new CNode* [10]; memset(child, 0, sizeof(CNode*) * 10); } CNode::~CNode(){ for (int i=0; i<10; i++) delete child[i]; } I get a stack overflow when trying to delete the root node. I might be wrong, but I am fairly certain that this is due to too many destructor calls (each destructor calls up to 10 other destructors). I know this is suboptimal both space, and time-wise, however, this is supposed to be a quick-and-dirty solution to a the repeated substring problem. tl;dr: how would one go about freeing the memory occupied by a very deep tree? Thank you for your time.

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• Trying to Insert Text to Access Database with ExecuteNonQueryin VB

  - by user3673701

  I'm working on this feature were i save text from a textbox on my form to a access database file. With the click on my "store" button I want to save the text in the corresponding textbox fields to the fields in my access database for searching and retrieving purposes. Im doing this in VB The problem I run into is the INSERT TO error with my "store" button Any help or insight as to why im getting error would be greatly appreciated. here is my code: Dim con As System.Data.OleDb.OleDbConnection Dim cmd As System.Data.OleDb.OleDbCommand Dim dr As System.Data.OleDb.OleDbDataReader Dim sqlStr As String Private Sub btnStore_Click(sender As Object, e As EventArgs) Handles btnStore.Click con = New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Eric\Documents\SPC1.2.accdb") con.Open() MsgBox("Initialized") sqlStr = "INSERT INTO Master FADV Calll info (First Name, Last Name, Phone Number, Email, User Id) values (" & txtFirstName.Text & " ' ,'" & txtLastName.Text & "','" & txtPhone.Text & "', '" & txtEmail.Text & "', '" & txtUserID.Text & "', '" & txtOtherOptionTxt.Text & "','" & txtCallDetail.Text & "');" cmd = New OleDb.OleDbCommand(sqlStr, con) cmd.ExecuteNonQuery() <------- **IM RECIVING THE ERROR HERE** MsgBox("Stored") ''pass ther parameter as sq; query, con " connection Obj)" con.Close()'

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• Is there a faster way to access a property member of a class using reflection?

  - by Ross Goddard

  I am currently using the following code to access the property of an object using reflection: Dim propInfo As Reflection.PropertyInfo = myType.GetProperty(propName) Dim objValue As Object = propInfo.GetValue(myObject, Nothing) I am having some issues with the speed since this type of code is being called many times and is causing some slowdown. I have been looking into using Refelction.Emit or dynamic methods, but I am not sure exactly how to make use of them. Background Information: I am creating a list of a subset of the properties of the object, associating then with some meta information (such as if they can be loaded from the database or xml, if they are editable, can the user see them). This is for later consumption so we can write code such as : foreach prop as BaseWrapper in graphNode.NodeProperties prop.LoadFromDataRow(dr) next The application makes heavy use of having access to this list. The problem is that on the initial load of a project, a larger number of objects are being created that make use of this, so for each object created it is looping through this code a number of times. I initially tried adding each property to the list manually, but this ran into problems with not everything being initialized at the correct time and some other issues. If there is no other good way, then I may have to rethink some of the design and see what else can be done to improve the performance.

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• What is common between environments within a shell terminal session?

  - by Matt1776

  I have a custom shell script that runs each time a user logs in or identity is assumed, its been placed in /etc/profile.d and performs some basic env variable operations. Recently I added some code so that if screen is running it will reattach it without needing me to type anything. There are some problems however. If I log-in as root, and su - to another user, the code runs a second time. Is there a variable I can set when the code runs the first time that will prevent a second run of the code? I thought to write something to the disk but then I dont want to prevent the code from running if I begin a new terminal session. Here is the code in question. It first attempts to reattach - if unsuccessful because its already attached (as it might be on an interruped session) it will 'take' the session back. screen -r if [ -z "$STY" ]; then exec screen -dR fi Ultimately this bug prevents me from substituting user to another user because as soon as I do so, it grabs the screen session and puts me right back where I started. Pretty frustrating

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• PHP | Online Notepad

  - by user2947423

  I recently made a Chat application in Visual Basic using PHP. I used this code: <?php $msg = $_GET['w']; $logfile= 'Chats.php'; $fp = fopen($logfile, "a"); fwrite($fp, $msg); fclose($fp); ?> I'm now trying to make a Online Notepad. What i want to do is in Visual Basic create a unique ID. That unique ID, has to be his filename. I'm not very good with PHP so what i want to know is: I want the unique ID to be the filename of the "Note". Like: $logfile= '{uniqueID.php}'; Whenever the user opens the program, it'll open his uniqueID.php file and he can edit that in my program. Long Story Short (TL;DR) Program generates uniqueID uniqueID is going to be a new file; {uniqueID}.php On next open it will check if {uniqueID}.php of him/her exists else it will make a new one. I know this isn't really secure but it's to learn something for myself.

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• Android - How to decide wether to run a Service in a separate Process?

  - by pableu

  I am working on an Android application that collects sensor data over the course of multiple hours. For that, we have a Service that collects the Sensor Data (e.g. Acceleration, GPS, ..), does some processing and stores them remotely on a server. Currently, this Service runs in a separate process (using android:service=":background" in the manifest). This complicates the communication between the Activities and the Service, but my predecessors created the Application this way because they thought that separating the Service from the Activities would make it more stable. I would like some more factual reasons for the effort of running a separate process. What are the advantages? Does it really run more stable? Is the Service less likely to be killed by the OS (to free up resources) if it's in a separate process? Our Application uses startForeground() and friends to minimize the chance of getting killed by the OS. The Android docs are not very specific about this, the mostly state that it depends on the Application's purpose ;-) TL;DR What are objective reasons to put a long-running Service in a separate process (in Android)?

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• backup and restoration of a freeipa infrastructure

  - by Sirex

  I'm finding the documentation on ipa server backup and restoration sadly lacking, and being so centrally critical it's not something i'm really happy about shooting in the dark with - could some kind soul more knowledable in the matter please attempt to provide an idiot-proof guide to backing up and restoring of IPA server(s) ? Particularly the main server (the cert signing one). ...We're looking towards rolling out ipa in a two server setup (1 master, 1 replica). I'm using dns srv records to handle failover, hence a loss of the replica isn't a big deal as i could make a new one and force a resync to happen - it's losing the master that bothered me. The thing that i'm really struggling with is locating a step-by-step procedure for backing up and restoring the master server. I'm aware that whole-VM snapshot is the recommended way of doing IPA server backup, but that isn't an option at this time for us. I'm also aware that freeipa 3.2.0 includes some sort of backup command build in, but that isn't in the ipa version of centos, and i don't expect it will be for some time yet. I've been trying many different methods, but none of them seem to restore cleanly, amongst others, i've tried; a command similar to db2ldif.pl -D "cn=directory manager" -w - -n userroot -a /root/userroot.ldif the script from here to produce three ldif files -- one for the domain ({domain}-userroot), and two for the ipa server (ipa-ipaca and ipa-userroot): Most of the restores i've tried have been similar to the form of: ldif2db.pl -D "cn=directory manager" -w - -n userroot -i userroot.ldif which seems to work and reports no errors, but totally borks the ipa install on the machine and i can no longer login with either the admin password on the backed up server, or the one i set it to on installation before attempting the ldif2db command (i'm installing ipa-server and running ipa-server-install, then attempting the restore). I'm not overly bothered about losing the CA, having to rejoin the domain, losing replication etc etc (although it'd be awesome if that could be avoided) but in the instance of the main server dropping i'd really like to avoid having to re-enter all the user/group information. I guess in the instance of losing the main server i could promote the other one and replicate in the other direction, but i've not tried that, either. Has anyone done that ? tl;dr: Can someone provide an idiots guide to backing up and restoring an IPA server (preferably on CentOS 6) in a clear enough way that'd make me feel confident it'll actually work when the dreaded time comes ? Crayons are optional, but appreciated ;-) I can't be the only person struggling with this, seeing how widely used IPA is, surely ?

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• autocomplete not working on one sever, works on others

  - by dogmatic69

  I have Ubuntu 10.10 x64 and x86 running on various servers and auto complete works on all of them bar one. The issue: apt-<tab> would show a list of options but sudo apt-<tab> would not. After fiddling with it for a few hours i've found that /etc/bash_autocomplete did not exist. on the broken server. Copying the one from a working one it now works. but still not properly. sudo apt-get ins<tab> does not show do anything. listing the files in /etc/bash_autocomplete.d/ on the working server has about 50 files, and the broken one only two or three. i dont think that i can just copy these files though as it might show commands for things that are not even installed. TL;DR autocomplete broken, how can i fix it. Seems like its disabled somewhere, why is this EDIT: Ok, it was not ever installed... $ sudo apt-get install bash-completion Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed bash-completion 0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded. Need to get 140kB of archives. After this operation, 1,061kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu/ maverick-updates/main bash-completion all 1:1.2-2ubuntu1.1 [140kB] Fetched 140kB in 0s (174kB/s) Selecting previously deselected package bash-completion. (Reading database ... 23808 files and directories currently installed.) Unpacking bash-completion (from .../bash-completion_1%3a1.2-2ubuntu1.1_all.deb) ... Processing triggers for man-db ... Setting up bash-completion (1:1.2-2ubuntu1.1) ... its now kinda working, but still wonky... apt-get ins<tab> gives sudo apt-get insserv as the option. also apt-get install php5<tab> gives apt-get install php5/ not php5-* options.

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• How to create an EFI System Partition?

  - by Alex Popov

  TL; DR How do I create an EFI system partition from scratch? How do I put the EFI firmware on it onces it is created? Long version I hava Toshiba T430 laptop. I received it with Windows 7 installed (but I think originally it has shipped with Windows 8). I installed Ubuntu on it, but deleted some partitions on the disk so that I ended up wiping out the Windows and only having Ubuntu. Among the deleted partitions was the EFI System partition. I discovered that Ubuntu now boots in Legacy mode (and not UEFI). I am trying to follow this guide on converting my Ubuntu installation from Legacy to UEFI. The problem - since there is no EFI partition whenever I choose from BIOS to boot using UEFI I cannot boot. That counts not only for the harddrive, but usb and DVD as well. I think this is logical - it expects an EFI partition and since it can't find it, it cannot continue booting futher, be it from HDD or DVD. So how do I recreate the EFI partition? The guide above says: Creating an EFI partition If you are manually partitioning your disk in the Ubuntu installer, you need to make sure you have an EFI partition set up. If your disk already contains an EFI partition (eg if your computer had Windows8 preinstalled), it can be used for Ubuntu too. Do not format it. It is strongly recommended to have only 1 EFI partition per disk. An EFI partition can be created via a recent version of GParted (the Gparted version included in the 12.04 disk is OK), and must have the following attributes: Mount point: /boot/efi (remark: no need to set this mount point when using the manual partitioning, the Ubuntu installer will detect it automatically) Size: minimum 100Mib. 200MiB recommended. Type: FAT32 Other: needs a "boot" flag. I had some trouble creating this partition: I boot from a live Ubuntu DVD, open GParted, create a 200MB partition and format it to FAT32. In GParted I cannot set the mount point and thus cannot set the bootflag. I didn't set the mount point in /etc/fstab since it's a live CD and fstab looked quite differently from what I expected compared to a normal boot. Anyway, I just didn't know what values to set. I booted again via the live DVD and then chose to install Ubuntu. I then created a partition with the mentioned criteria - mount point, 200MB, FAT32, boot flag. However, I continue to have this problem and I suppose it's because on that partition there is no EFI firmware, it's just an empty partition, which is suitable to have EFI firmware. So again, how do I create an EFI partition, which has the EFI software, so that the laptop can once again boot in UEFI mode?

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• ruby on rails gitorious setup on ubuntu

  - by dogmatic69

  Ive been trying to install gitorious for a while now which required ruby and rails etc. Ive finally got rails pages serving but cant finish the installation of gitorious because the gem version is too new. the error logs say please run 'rake ultrasphinx:configure' and that gives rake ultrasphinx:configure (in /var/www/apps/gitorious) rake aborted! uninitialized constant ActiveSupport::Dependencies::Mutex /var/www/apps/gitorious/Rakefile:10:in `require' (See full trace by running task with --trace) From searching google this is beacuse of the wrong gem verison. Cant find a way to down grade it. apparently sudo gem update --system 1.4.2 should do the trick but ubuntu 10.10 does not like this. ERROR: While executing gem ... (RuntimeError) gem update --system is disabled on Debian, because it will overwrite the content of the rubygems Debian package, and might break your Debian system in subtle ways. The Debian-supported way to update rubygems is through apt-get, using Debian official repositories. If you really know what you are doing, you can still update rubygems by setting the REALLY_GEM_UPDATE_SYSTEM environment variable, but please remember that this is completely unsupported by Debian. So i added export REALLY_GEM_UPDATE_SYSTEM=1 to .bashrc and reloaded it with . ~/.bashrc and still the same. ive tried various forms of setting this environmental variable with no luck. Ive also been told on #gitorious irc channel to add the file config/initializers/rubygems.rb with the line require "thread" to it. This has done nothing. EDIT: Just found another way which was rvm install rubygems 1.4.2 and it gave: Removing old Rubygems files... Installing rubygems dedicated to ruby-1.8.7-p334... Retrieving rubygems-1.4.2 % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 288k 100 288k 0 0 282k 0 0:00:01 0:00:01 --:--:-- 414k Extracting rubygems-1.4.2 ... Installing rubygems for /home/ubuntu/.rvm/rubies/ruby-1.8.7-p334/bin/ruby ERROR: Error running 'GEM_PATH="/home/ubuntu/.rvm/gems/ruby-1.8.7-p334:/home/ubuntu/.rvm/gems/ruby-1.8.7-p334@global:/home/ubuntu/.rvm/gems/ruby-1.8.7-p334@global" GEM_HOME="/home/ubuntu/.rvm/gems/ruby-1.8.7-p334" "/home/ubuntu/.rvm/rubies/ruby-1.8.7-p334/bin/ruby" "/home/ubuntu/.rvm/src/rubygems-1.4.2/setup.rb"', please read /home/ubuntu/.rvm/log/ruby-1.8.7-p334/rubygems.install.log WARN: Installation of rubygems did not complete successfully. TL;DR please tell me how to downgrade rubygems on ubuntu 10.10 or upgrade gitorious to work with 1.6.2 gems

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