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• Regex to GENERATE thumbnails!?!?! (but that's crazy!)

  - by CryptoMonkey

  Hello everyone! So here is my situation, and the solution that I've come up with to solve the problem. I have created an application that includes TinyMCE to allow users to create HTML content for publishing. The user can include images in their markup, and drag/resize those images effecting the final Width/Height attributes in the IMG tag. This is all great, the users can include images and resize/relocate them to their desired appearance. But one big problem is that I am now sending a (possibly) much larger image to the client, only to have the browser resize the image into the requested Width/Height attributes. All that bandwidth and lost load time.... So my solution is to pre-process my users markup content, scanning all of the IMG tags and parsing out the Height/Width/Src attributes. Then set each img's SRC tag to a phpThumb request with the parsed Height/Width passed into the thumbnails URL. This will create my reduced size image (optimising bandwidth at the expense of CPU and caching). What do you think about this solution? I've seen other posts where people were using mod_rewrite to do something similar, but I want to effect the content on the page service and not manipulate the image requests as they're being received. .... Any thoughts about this design? I need some help with the fine details as my regex skills need some work, but I'm very short on time and promise to pay my technical knowledge debt soon. To make the regex's easier, I can be sure of some things. Only img tags that need this processing will have an existing width="" height="" attributes (with the double quotes, and lower cased text, but I suppose matching the text case insensitive would be better if TinyMCE changes) So a regex to match only the necessary Img tags, and maybe another three regex's to extract the src, the width, and the height? Thanks everyone.

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• What job title should be most suitable for my object in resume and what salary range should I expect

  - by user354177

  I was a classic asp developer in 2000. After a year of full-time employment, I left the field. I found a part-time position as an asp developer again in 2005 and taught myself vb.net. In 2007, I got the current full-time job as an Asp.net web developer. I taught myself C#, LING t0 SQL, Web Services, AJAX, and creating all kinds of reports with reporting services. One and half years ago, I sent myself to part-time graduate program in Database and Web Systems. I'll have two semesters to go and so far my GPA is 4.0/4.0. My job responsibility is to collect business requirements from other departments, design the database, write stored procedures, create aspx pages, and create reports. I love what I do and want to advance my career to the next level. What I enjoy most is to design the relational database. I would want to become an .Net Architect eventually. I got an interview. They were looking for asp.net web developer. But I was surprised and disappointed that position would only create aspx pages. I would not even have opportunity to write stored procedures, let alone design the database (those would be provided by another group). Furthermore, they asked me some detailed questions about web forms, some of which I did not know the answers. they might be disappointed as well. I am eager to learn and can apply what I learn to real projects right away. I believe no matter what specific skills I am lacking for a new position, I can catch up quickly. I am looking for $70k range job. The object in my resume is Experience C# Web Application Developer. Due to the experience from last interview, I wonder if the object is really what I want. Could somebody answer my questions? Thank you.

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• What's a good starting point, tutorial, or project, to learn database programming?

  - by DarthNoodles

  I've been a Software Developer now for over 10 years. I've mostly worked in Embedded C with some time spent on C++ (limited) and Java. I'm looking to learn some new technologies and skills. I thought that database programming may be interesting to learn. I would like to make my own pet project in order to learn these things. My platform of choice is Windows but can work in Linux also. My ideal pet project would involve a GUI and some network/internet programming also which I have some experience doing. I wouldn't mind getting into C# but don't want to bite off more than I can chew right now as my spare time is limited. If I understand correctly SQLite allows for programs to use a database without running an ODBC server. Is this correct? Is that a good place to start? What can I do to start that is not too complicated but not so simple that I won't learn the details also? Your opinions and feedback would be appreciated.

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• Run SQL Scripts from C# application across domains

  - by Saravanan AR

  To run sql script files from my C# application, I referred this. http://social.msdn.microsoft.com/Forums/en/adodotnetdataproviders/thread/43e8bc3a-1132-453b-b950-09427e970f31 it works perfectly when my machine and DB server are in the same domain. my problem now is, i'm executing this console application from a machine (name: X, user id: abc, domain D1). the SQL server is in another machine (name: Y, domain: D2). I use VPN to connect to machine Y with user id 'abc' and work on SQL in remote desktop. how can i run sql scripts across domains? I use this in a custom activity in my TFS build template as the last step to run the scripts in the target database which is in domain D2. i'm getting this error: "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" is it possible to connect to the DB using the admin user ID of machine Y in domain D2?

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• Design Advice Needed For Synonyms Database

  - by James J

  I'm planning to put together a database that can be used to query synonyms of words. The database will end up huge, so the idea is to keep things running fast. I've been thinking about how to do this, but my database design skills are not up to scratch these days. My initial idea was to have each word stored in one table, and then another table with a 1 to many relationship where each word can be linked to another word and that table can be queried. The application I'm developing allows users to highlight a word, and then type in, or select some synonyms from the database for that word. The application learns from the user input so if someone highlights "car" and types in "motor" the database would be updated to link the relationship if it don't exist already. What I don't want to happen is for a user to type in the word "shop" and link it to the word car. So I'm thinking I will need to add some sort of weight to each relationship. Eventually the synonyms the users enter will be used so they can auto select common synonyms used with a certain word. The lower weight words will not be displayed so shop could never be a synonym of car unless it had a very high weight, and chances are nobody is going to do that. Does the above sound right? Can you offer any suggestions or improvements?

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• Management API - The request body XML was invalid or not correctly specified

  - by maartenba

  Cross posting from http://social.msdn.microsoft.com/Forums/en-US/windowsazuretroubleshooting/thread/31b6aedc-c069-4e32-8e8f-2ff4b7c30793 I'm getting this error on changing configuration through the service management API: The request body XML was invalid or not correctly specified The request body payload: <?xml version="1.0" encoding="utf-8"?> <ChangeConfiguration xmlns="http://schemas.microsoft.com/windowsazu re"> <Configuration>PD94bWwgdmVyc2lvbj0iMS4wIj8+CjxTZXJ2aWNlQ29uZmlndX JhdGlvbiB4bWxuczp4c2k9Imh0dHA6Ly93d3cudzMub3JnLzIwMDEvWE1MU2NoZW1hLWluc3RhbmNlIi B4bWxuczp4c2Q9Imh0dHA6Ly93d3cudzMub3JnLzIwMDEvWE1MU2NoZW1hIiB4bWxucz0iaHR0cDovL3 NjaGVtYXMubWljcm9zb2Z0LmNvbS9TZXJ2aWNlSG9zdGluZy8yMDA4LzEwL1NlcnZpY2VDb25maWd1cm F0aW9uIiBzZXJ2aWNlTmFtZT0iIiBvc0ZhbWlseT0iMSIgb3NWZXJzaW9uPSIqIj4KICA8Um9sZSBuYW 1lPSJXZWJSb2xlMSI+CiAgICA8Q29uZmlndXJhdGlvblNldHRpbmdzPgogICAgICA8U2V0dGluZyBuYW 1lPSJNaWNyb3NvZnQuV2luZG93c0F6dXJlLlBsdWdpbnMuRGlhZ25vc3RpY3MuQ29ubmVjdGlvblN0cm luZyIgdmFsdWU9IlVzZURldmVsb3BtZW50U3RvcmFnZT10cnVlIi8+CiAgICA8L0NvbmZpZ3VyYXRpb2 5TZXR0aW5ncz4KICAgIDxJbnN0YW5jZXMgY291bnQ9IjIiLz4KICAgIDxDZXJ0aWZpY2F0ZXMvPgogID wvUm9sZT4KPC9TZXJ2aWNlQ29uZmlndXJhdGlvbj4K</Configuration> </ChangeConfiguration> I'm passing it the following configuration: $configuration = '<?xml version="1.0" encoding="utf-8"?> <ServiceConfiguration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" serviceName="" osFamily="1" osVersion="*"> <Role name="WebRole1"> <ConfigurationSettings> <Setting name="Microsoft.WindowsAzure.Plugins.Diagnostics.ConnectionString" value="UseDevelopmentStorage=true"/> </ConfigurationSettings> <Instances count="2"/> <Certificates/> </Role> </ServiceConfiguration>'; Does anyone know why this error occurs? I suspect it has something to do with encoding but not sure.

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• Regex for ignoring consecutive quotation marks in string

  - by will-hart

  I have built a parser in Sprache and C# for files using a format I don't control. Using it I can correctly convert: a = "my string"; into my string The parser (for the quoted text only) currently looks like this: public static readonly Parser<string> QuotedText = from open in Parse.Char('"').Token() from content in Parse.CharExcept('"').Many().Text().Token() from close in Parse.Char('"').Token() select content; However the format I'm working with escapes quotation marks using "double doubles" quotes, e.g.: a = "a ""string""."; When attempting to parse this nothing is returned. It should return: a ""string"". Additionally a = ""; should be parsed into a string.Empty or similar. I've tried regexes unsuccessfully based on answers like this doing things like "(?:[^;])*", or: public static readonly Parser<string> QuotedText = from content in Parse.Regex("""(?:[^;])*""").Token() This doesn't work (i.e. no matches are returned in the above cases). I think my beginners regex skills are getting in the way. Does anybody have any hints? EDIT: I was testing it here - http://regex101.com/r/eJ9aH1

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• 2 basic but interesting questions about .NET

  - by b-gen-jack-o-neill

  Hi, when I first saw C#, I thought this must be some joke. I was starting with programming in C. But in C# you could just drag and drop objects, and just write event code to them. It was so simple. Now, I still like C the most, becouse I am very attracted to the basic low level operations, and C is just next level of assembler, with few basic routines, so I like it very much. Even more becouse I write little apps for microcontrollers. But yeasterday I wrote very simple control program for my microcontroller based LED cube in asm, and I needed some way to simply create animation sequences to the Cube. So, I remembered C#. I have practically NO C# skills, but still I created simple program to make animation sequences in about hour with GUI, just with help of google and help of the embeded function descriptions in C#. So, to get to the point, is there some other reason then top speed, to use any other language than C#? I mean, it is so effective. I know that Java is a bit of similiar, but I expect C# to be more Windows effective since its directly from Microsoft. The second question is, what is the advantage of compiling into CIL, and than run by CLR, than directly compile it into machine code? I know that portability is one, but since C# is mainly for Windows, wouldn´t it be more powerfull to just compile it directly? Thanks.

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• Best method to cache objects in PHP?

  - by Martin Bean

  Hi, I'm currently developing a large site that handles user registrations. A social networking website for argument's sake. However, I've noticed a lag in page loads and deciphered that it is the creation of objects on pages that's slowing things down. For example, I have a Member object, that when instantiated with an ID passed as a construct parameter, it queries the database for that members' row in the members database table. Not bad, but this is created each time a page is loaded; and called more than once when say, calling an array of that particular members' friends, as a new Member object is created for each friend. So on a single page I can have upwards of seven of the same object, but containing different properties. What I'm wanting to do is to find a way to reduce the database load, and to allow persist objects between page loads. For example, the logged in user's object to be created on login (which I can do) but then stored somewhere for retrieval so I don't have to keep re-creating the object between page loads. What is the best solution for this? I've had a look at Memcache, but with it being a third-party module I can't have the web host install it on this occasion. What are my alternatives, and/or best practices in my case? Thanks in advance.

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• Are multiline queries sql-injection safe?

  - by acmatos

  This might be a stupid question. Or maybe my hacking skills are limited (I don't practice them at all). I have a query that looks like this: <?php $query =<<<eot SELECT table_x.field1, table_x.field2, table_y.*, table_z.field4 FROM ( SELECT ... ) as table_y LEFT JOIN table_x ON table_x.field1 = table_y.field_x LEFT JOIN table_z ON table_z.field1 = table_y.field_z WHERE table_x.field3 = '$something' AND table_z.field4 = '1' AND table_z.field5 = '2' eot; ?> I have a lot of other tests on $something before it gets used, like $something = explode(' ',$something); (which later result in a string) none of them intend to prevent injection but they make it hard for the given injection to get as is to the actual query. However, there are ways. We all know how easy it is to replace a space for something else which is still valid.. So, it's not really a problem to make a potentially harmful piece of SQL reach that $something... But is there any way to comment the rest of the original query string if it is multi-line? I can comment AND table_z.field4 = '1' using ;-- but can't comment the following AND table_z.field5 = '2' Is it possible to open a multi-line comment /* without closing it or something looked like and therefore allow the injection to ignore the multi-line query?

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• How to learn a new programming language? And how to choose the appropriate language?

  - by Sebi

  Unfortunately my last question was closed, so I reformulated the question: I know this question was here a lot of times and can't be answered at all, but im not looking for a single name, but rather for an advice in my situation. I learned programming with Java and now I'm developing in Java for more or less 5 years (at the university) and I thinks my programming skills their are really ok/average. I have also small experience in C/C++ and C#. Now I have some spare time and I'd like to learn a new language or deepen the knowledge of Java/C/C++. But how to choose the right language to learn? I'd like to learn a language which will be usefull in the future concerning working in a software development business? I know there is no single answer, but I'm sure you could mention some languages that are more usefull than others. And what's the best way to learn such a language efficiently (bearing in mind that one has already learned some other languages)? Just doing tutorials? Or trying to implement a project? Trying to move a Java project to the new language?

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• How to build the SysUtils.Format string function in Delphi?

  - by Sam

  If I have the following Delphi code type TFormatArgs = array of TVarRec; procedure DelphiGodsGiveMeTheAnswerPrettyPlease; var iMyAge: integer; iMyIQ: integer; sCode: string; sText: string; begin iMyAge := 5; iMyIQ := -5; sCode := 'Format(''My age is %d and my IQ is %d'', [iMyAge, iMyIQ])'; sText := FormatThis(sCode, iMyAge, iMyIQ); end; function FormatThis(sFormatCode: string; iVar1: integer; iVar2: integer): string; var sFormatString: string; arFormatArgs: TFormatArgs; begin sFormatString := GetFormatString(sFormatCode); // I can implement this function arFormatArgs := ConstructFormatArgs(iVar1, iVar2); // NEED HELP HERE! result := SysUtils.Format(sFormatString, arFormatArgs); end; How can I implement my ConstructFormatArgs function in Delphi (not Assembly)? I'm afraid the assembly code in SysUtils.WideFormatBuf is just a little bit beyond my comprehension skills! Any ideas? I'm seeking divine assistance. Even if you can contribute just a little hint here and there on how to improve it or help me progress with this exercise. TIA.

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• Can a pc with a 1.2 ghz dual core run VS 2013? [on hold]

  - by moo2

  Edit: This question is about a tool used for programming, Microsoft Visual Studio 2013. I already read the minimum requirements for VS 2013 before I posted or I wouldn't have asked the question. I searched on the web for an answer for a few hours before posting. Why should I go out and spend $400 on a laptop if I can spend less than $100 and use it to learn how to program? In the context of the question it is clear I was not asking for advice on what laptop to buy and it was also clear I was not asking for someone to walk me through the system requirements of VS 2013. This is a vast community and I was wondering if someone in this vast community would have experience in dealing with my question. In other words has anyone ever tried anything like it? If I had an old computer sitting around I would have tested it. At the moment all I have is a friend's Chromebook I'm borrowing. End Edit. I know the requirements for Microsoft Visual Studio 2013 state 1.6 ghz processor. I'm looking at getting a laptop for school and I found one that is old but cheap and would work for college. The Dell D430 I'm looking at getting has a 1.2ghz Core 2 Duo CPU, 80GB HD, 2GB RAM, and Windows 7 Home Premium. It's refurbished. I can get it for less than most phone's cost and from a Microsoft Authorized Refurbisher. I know it's not a skyrim rig but it's lightweight and can handle being a college laptop and doing word processing. Would Visual Studio 2013 run at all? If it is slower I'm not concerned. I just want to know if it would work and compile my assignments and run them? I'd be using this laptop for doing assignments and learning programming languages not for coding the next social media sensation.

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• Random servers in Citrix servers suddenly bluescreens (mostly 0x0000008e and 0x0000007e)

  - by Rasmus Rask

  I'm responsible for a Citrix Presentation Server 4.5 farm. Starting Friday 30. November, my servers started to crash randomly. So far we've experienced 80 crashes, so it's obviously becoming an increasingly big problem for us. I have 12+ years experience with IT, so I know the difference between 0 and 1, but I have a hard time cracking this. We've rolled back any recent changes I can think of for different groups of servers, but all groups still seem to crash. I don't have the skills to interpret the memory dumps to find the culprit. Has anyone encountered the same or a similar problem? - might be a generic Windows issue Other than executing "analyze -v" in WinDbg, how do I work my way through the memory dumps to see what actually triggered the BSOD? Any suggested steps in getting to the bottom of this? Any help is greatly appreciated. I can also provide links to kernel memory dumps or WinDbg output if necessary. Thanks! Problem description The majority of the STOP errors we encounter are: 0x0000008e KERNEL_MODE_EXCEPTION_NOT_HANDLED (50%) 0x0000007e SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (26%) 0x00000050 PAGE_FAULT_IN_NONPAGED_AREA (21%) We also see a few 0x0000000a IRQL_NOT_LESS_OR_EQUAL (3%). For both 0x0000008e and 0x0000007e bug checks, the exception code is 0xc0000005 (Access Violation). When opening dump files in WinDbg, most details are exactly the same, for all the 0x0000008e and 0x0000007e bug checks respectively: 0x0000008e Exception address: 0x808bc9e3 Trap frame: [varies] FAILURE_BUCKET_ID: 0x8E_nt!HvpGetCellMapped+97 Probably Caused by (IMAGE_NAME): ntkrpamp.exe 0x0000007e Exception address: 0x808369b6 Exception record address: 0xf70d3be0 Context record address: 0xf70d38dc FAILURE_BUCKET_ID: 0x7E_nt!MmPurgeSection+14 Probably Caused by: memory_corruption About 30% of the crashes happens between 17:00 and 19:00, which leads me to believe this tend to happen more often during logoffs. But then again, only ~15% occurs between 15:00 and 17:00. Summary of farm Citrix Presentation Server 4.5 R06 on Windows Server 2003 R2 SP2 All high priority patches, at least as of October installed Virtualized using VMWare ESX/vSphere 4.1 on HP Proliant BL460c G6 blade servers About 53 Presentation Servers in production, divided into three silos - only one of which, the largest, is affected 2 vCPU's (5 GHz reserved), 8 GB RAM (all reserved) for each Presentation Server Plenty of free disk space Very few printer drivers - automated deletion of non-approved drivers every night ~1.000 peak concurrent users, which is reached at around 10:30 (on weekdays) Number of sessions steadily decline between 15:00 and 19:00 to ~230

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• Getting macro keys from a razer blackwidow to work on linux

  - by Journeyman Geek

  I picked up a razer blackwidow ultimate that has additional keys meant for macros that are set using a tool that's installed on windows. I'm assuming that these arn't some fancypants joojoo keys and should emit scancodes like any other keys. Firstly is there a standard way to check these scancodes in linux? Secondly how do i set these keys to do things in command line and x based linux setups? My current linux install is xubuntu 10.10, but i'll be switching to kubuntu once i have a few things fixed up. Ideally the answer should be generic and system-wide Things i have tried so far: showkeys from the built in kbd package (in a seperate vt) - macro keys not detected xev - macro keys not detected lsusb and evdev output this ahk script's output suggests the M keys are not outputting standard scancodes Things i need to try snoopy pro + reverse engineering (oh dear) Wireshark - preliminary futzing around seems to indicate no scancodes emitted when what i seem to think is the keyboard is monitored and keys pressed. Might indicate additional keys are a seperate device or need to be initialised somehow. Need to cross reference that with lsusb output from linux, in 3 scenarios - standalone, passed through to a windows VM without the drivers installed, and the same with. LSUSB only detects one device on a standalone linux install It might be useful to check if the mice use the same razer synapse driver , since that means some variation of razercfg might work (not detected. only seems to work for mice) Things i have Have worked out: In a windows system with the driver, the keyboard is seen as a keyboard and a pointing device. And said pointing device uses, in addition to your bog standard mouse drivers.. a driver for something called a razer synapse. Mouse driver seen in linux under evdev and lsusb as well Single Device under OS X apparently, though i have yet to try lsusb equivilent on that Keyboard goes into pulsing backlight mode in OS X upon initialisation with the driver. This should probably indicate that there's some initialisation sequence sent to the keyboard on activation. They are, in fact, fancypants joojoo keys. Extending this question a little I have access to a windows system so if i need to use any tools on that to help answer the question, its fine. I can also try it on systems with and without the config utility. The expected end result is still to make those keys usable on linux however. I also realise this is a very specific family of hardware. I would be willing to test anything that makes sense on a linux system if i have detailed instructions - this should open up the question to people who have linux skills, but no access to this keyboard The minimum end result i require I need these keys detected, and usable in any fashion on any of the current graphical mainstream ubuntu varients

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• DPM 2010 PowerShell Script to Easily Restore Multiple Files

  - by bmccleary

  I’ve got what I thought would be a simple task with Data Protection Manager 2010 that is turning out to be quite frustrating. I have a file server on one server and it is the only server in a protection group. This file server is the repository for a document management application which stores the files according to the data within a SQL database. Sometimes users inadvertently delete files from within our application and we need to restore them. We have all the information needed to restore the files to include the file name, the folder that the file was stored in and the exact date that the file was deleted. It is easy for me to restore the file from within the DPM console since we have a recovery point created every day, I simply go to the day before the delete, browse to the proper folder and restore the file. The problem is that using the DPM console, the cumbersome wizard requires about 20 mouse clicks to restore a single file and it takes 2-4 minutes to get through all the windows. This becomes very irritating when a client needs 100’s of files restored… it takes all day of redundant mouse clicks to restore the files. Therefore, I want to use a PowerShell script (and I’m a novice at PowerShell) to automate this process. I want to be able to create a script that I pass in a file name, a folder, a recovery point date (and a protection group/server name if needed) and simply have the file restored back to its original location with some sort of success/failure notification. I thought it was a simple basic task of a backup solution, but I am having a heck of a time finding the right code. I have seen the sample code at http://social.technet.microsoft.com/wiki/contents/articles/how-to-use-a-windows-powershell-script-to-recover-an-item-in-data-protection-manager.aspx that I have tried to follow, but it doesn’t accomplish what I really want to do (it’s too simplistic) and there are errors in the sample code. Therefore, I would like to get some help writing a script to restore these files. An example of the known values to restore the data are: DPM Server: BACKUP01 Protection Group: Document Repository Data Protected Server: FILER01 File Path: R:\DocumentRepository\ToBackup\ClientName\Repository\2010\07\24\filename.pdf Date Deleted: 8/2/2010 (last recovery point = 8/1/2010) Bonus Points: If you can help me not only create this script, but also show me how to automate by providing a text file with the above information that the PowerShell script loops through, or even better, is able to query our SQL server for the needed data, then I would be more than willing to pay for this development.

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• Accidentally Removed Permissions for the XP SP3 Registry key HKEY_CLASSES_ROOT! Workaround Please!

  - by Praveen Kumar

  This is Praveen and I am using Microsoft Windows XP SP3 Build 2600. I had problems with using Microsoft Office 2010. It was keeping on saying, "Please wait while windows configures Microsoft Office Professional Plus 2010". After seeing this link: http://social.answers.microsoft.com/Forums/en-US/outlookcontact/thread/6e9c3f2e-010a-4b74-b433-0c41548ee468?prof=required I thought of giving the Registry Key: HKEY_CLASSES_ROOT, full access permissions for Everyone. I went to the registry, right-clicked on HKEY_CLASSES_ROOT and clicked on Permissions. I added Everyone and gave Full Control to the ACL and clicked on Apply. Also I checked "Replace permission entries on all child objects with entries shown here that apply to child objects." After a long time, it said with an error, cannot replace for few entries. Now, the key, HKEY_CLASSES_ROOT has no access to any user. My system is not starting up. Some of my friends asked me to try the Last Known Good Configuration. Even that did not work out. When I tried to open in the Safe Mode, I got only one driver to load and even that didn't load well. Another friend suggested me to put the Setup disk and reinstall the OS. I tried that and after completing the "Installing Device Drivers" part, when it started "Installing Network", the system is getting restarted. Now, the setup is also half way through and even if I open in Safe Mode to try System Restore, it popped up a message saying, "Setup cannot run under Safe Mode. Setup will restart now." and the system is restarting. All my official files and my software, which I developed for Registry Security, resides in my system now. I am unable to access the system and I want it to be working to submit the project, as the deadline is this week. I had no better solutions from elsewhere. Can anyone please help me out with this issue. If it is possible to open the registry editor's stored file from another system and restore the access permissions, I hope it would solve the problem. Please do help me. Thanking You, Praveen.

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• Automating the choice between JPEG and PNG with a script

  - by MHC

  Choosing the right format to save your images in is crucial for preserving image quality and reducing artifacts. Different formats follow different compression methods and come with their own set of advantages and disadvantages. JPG, for instance is suited for real life photographs that are rich in color gradients. The lossless PNG, on the other hand, is far superior when it comes to schematic figures: Picking the right format can be a chore when working with a large number of files. That's why I would love to find a way to automate it. A little bit of background on my particular use case: I am working on a number of handouts for a series of lectures at my unversity. The handouts are rich in figures, which I have to extract from PDF-formatted slides. Extracting these images gives me lossless PNGs, which are needlessly large at times. Converting these particular files to JPEG can reduce their size to up to less than 20% of their original file size, while maintaining the same quality. This is important as working with hundreds of large images in word processors is pretty crash-prone. Batch converting all extracted PNGs to JPEGs is not an option I am willing to follow, as many if not most images are better suited to be formatted as PNGs. Converting these would result in insignificant size reductions and sometimes even increases in filesize - that's at least what my test runs showed. What we can take from this is that file size after compression can serve as an indicator on what format is suited best for a particular image. It's not a particularly accurate predictor, but works well enough. So why not use it in form of a script: I included inotifywait because I would prefer for the script be executed automatically as soon as I drag an extracted image into a folder. This is a simpler version of the script that I've been using for the last couple of weeks: #!/bin/bash inotifywait -m --format "%w%f" --exclude '.jpg' -r -e create -e moved_to --fromfile '/home/MHC/.scripts/Workflow/Conversion/include_inotifywait' | while read file; do mogrify -format jpg -quality 92 "$file" done The advanced version of the script would have to be able to handle spaces in file names and directory names preserve the original file names flatten PNG images if an alpha value is set compare the file size between the temporary converted image and its original determine if the difference is greater than a given precentage act accordingly The actual conversion could be done with imagemagick tools: convert -quality 92 -flatten -background white file.png file.jpg Unfortunately, my bash skills aren't even close to advanced enough to convert the scheme above into an actual script, but I am sure many of you can. My reputation points on here are pretty low, but I will gladly award the most helpful answer with the highest bounty I can set. References: http://www.formortals.com/introducing-cnb-imageguide/, http://www.turnkeylinux.org/blog/png-vs-jpg Edit: Also see my comments below for some more information on why I think this script would be the best solution to the problem I am facing.

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• Old operational master still thinks it is the "one"

  - by Doug

  Hi there, I have a domain with 3 AD servers for now i'll just call them: AD01 (Win 2008 GC, Operations master) AD02 (Win 2008 GC) AD03 (Win 2003 GC) A couple of months there was some hardware issues with AD01 so the operations master, PDC and Infrastructure Master was moved to AD02. All machines where on while this was happening. AD01 (Win 2008 GC) AD02 (Win 2008 GC, Operations master) AD03 (Win 2003 GC) AD01 was then shutdown for a month. Upon starting this machine up with replaced hardware (NIC and RAID card) i now have a weird problem. AD01 Thinks it is operations master still in AD on the local box AD02 & AD03 Thinks AD02 is operations master in AD on both boxes When running DCDIAG on AD01 i get a number of issues (listed below) When running "dcdiag /test:advertising" on AD01: Doing primary tests Testing server: Default-First-Site-Name\AD01 Starting test: Advertising Warning: DsGetDcName returned information for \\ad02.domain.local, when we were trying to reach AD01. SERVER IS NOT RESPONDING or IS NOT CONSIDERED SUITABLE. ......................... AD01 failed test Advertising Running partition tests on : ForestDnsZones Running partition tests on : DomainDnsZones Running partition tests on : Schema Running partition tests on : Configuration Running partition tests on : domain Running enterprise tests on : domain.local When running "dcdiag" on AD01 i get the following errors (excerpt of the Final output): Testing server: Default-First-Site-Name\AD01 Starting test: Advertising Warning: DsGetDcName returned information for \\ad02.domain.local, when we were trying to reach AD01. SERVER IS NOT RESPONDING or IS NOT CONSIDERED SUITABLE. ......................... AD01 failed test Advertising Starting test: FrsEvent There are warning or error events within the last 24 hours after the SYSVOL has been shared. Failing SYSVOL replication problems may cause Group Policy problems. Starting test: NCSecDesc Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have Replicating Directory Changes In Filtered Set access rights for the naming context: DC=ForestDnsZones,DC=domain,DC=local Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have Replicating Directory Changes In Filtered Set access rights for the naming context: DC=DomainDnsZones,DC=domain,DC=local Starting test: Replications [Replications Check,Replications Check] Inbound replication is disabled. To correct, run "repadmin /options AD01 -DISABLE_INBOUND_REPL" [Replications Check,AD01] Outbound replication is disabled. To correct, run "repadmin /options AD01 -DISABLE_OUTBOUND_REPL" So the problem appeasr to be that when i moved the operations master, AD01 never got the memo, and now that it's started up, all the other AD servers don't think its the boss anymore when it trys to replicate etc. So i really need to manually update AD01 so that it knows who the operations master, instrastructure and PDC is - but i'm not having any luck I've been googling for nearly a day and all solutions lead to "the cake is a lie" Your ninja skills will be greatly appreciated

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• How do I protect a low budget network from rogue DHCP servers?

  - by Kenned

  I am helping a friend manage a shared internet connection in an apartment buildling with 80 apartments - 8 stairways with 10 apartments in each. The network is laid out with the internet router at one end of the building, connected to a cheap non-managed 16 port switch in the first stairway where the first 10 apartments are also connected. One port is connected to another 16 port cheapo switch in the next stairway, where those 10 apartments are connected, and so forth. Sort of a daisy chain of switches, with 10 apartments as spokes on each "daisy". The building is a U-shape, approximately 50 x 50 meters, 20 meters high - so from the router to the farthest apartment it’s probably around 200 meters including up-and-down stairways. We have a fair bit of problems with people hooking up wifi-routers the wrong way, creating rogue DHCP servers which interrupt large groups of the users and we wish to solve this problem by making the network smarter (instead of doing a physical unplugging binary search). With my limited networking skills, I see two ways - DHCP-snooping or splitting the entire network into separate VLANS for each apartment. Separate VLANS gives each apartment their own private connection to the router, while DHCP snooping will still allow LAN gaming and file sharing. Will DHCP snooping work with this kind of network topology, or does that rely on the network being in a proper hub-and-spoke-configuration? I am not sure if there are different levels of DHCP snooping - say like expensive Cisco switches will do anything, but inexpensive ones like TP-Link, D-Link or Netgear will only do it in certain topologies? And will basic VLAN support be good enough for this topology? I guess even cheap managed switches can tag traffic from each port with it’s own VLAN tag, but when the next switch in the daisy chain receives the packet on it’s “downlink” port, wouldn’t it strip or replace the VLAN tag with it’s own trunk-tag (or whatever the name is for the backbone traffic). Money is tight, and I don’t think we can afford professional grade Cisco (I have been campaigning for this for years), so I’d love some advice on which solution has the best support on low-end network equipment and if there are some specific models that are recommended? For instance low-end HP switches or even budget brands like TP-Link, D-Link etc. If I have overlooked another way to solve this problem it is due to my lack of knowledge. :)

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• How to grow to be global sysadmin of an organization?

  - by user64729

  Bit of a non-technical question but I have seen questions of the career development type on here before so hopefully it is fine. I work for a fast growing but still small organization (~65 employees). I have been their external sysadmin for a while now, looking after hosted Linux servers and infrastructure. In the past 12 months I have been transforming into the internal sysadmin for our office too. I'm currently studying Cisco CCNA to cover the demands of being an internal sysadmin and looking after the office LAN, routers, switches and VPNs. Now they want me to look after the global sysadmin function of the organization as a whole. The organization has 3 offices in total, 2 in the UK and 1 in the US. I work in one of the UK offices. The other offices are primarily Windows desktops with AD domain shops. My office is primarily a Linux shop with a file-server and NFS/NIS (no AD domain for the Windows desktops yet but it's in the works). Each other office has a sysadmin which in theory I am supposed to supervise but in reality each is independent. I have a very competent junior sysadmin working with me who shares the day-to-day tasks and does some of the longer term projects with my supervision. My boss has asked me how to grow from being the external sysadmin to the global sysadmin. I am to ponder this and then report back to him on how to achieve this. My current thoughts are: Management training or professional development - eg. reading books such as "Influencer" and "7 Habits". Also I feel I should take steps to improving communication skills since a senior person is expected to talk and speak out more often. Learn more about Windows and Active Directory - I'm an LPI-certified guy and have a lot of experience in Linux (Ubuntu or desktop, Debian/Ubuntu as server). Since the other offices are mainly Windows-domains it makes sense to skill-up in that area so I can understand what the other admins are talking about. Talk to previous colleagues who have are are in this role already - to try and get the benefit of their experience. Produce an "IT Roadmap" or similar that maps out where we want the organization to be and when, plotted out over the next couple of years with regards to internal and external infrastructure. I have produced a "Security roadmap" already which does cover some of these things. I guess this can summed up as "thinking more strategically"? I'd appreciate comments from anyone who has been through a similar situation, thanks.

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• Change default DNS server in Arch Linux

  - by AntoineG

  I'm in Viet Nam and most social websites (Facebook, Twitter and the likes - even reddit) are blocked by the ISP DNS server. I tried to change the DNS server of my Arch box using the resolv.conf file, but it failed miserably since dhcpd generates this file automatically everytime I connect to the LAN. I've been looking around to try and find out how to fix this, without success. Either I s*ck at Googling, either it is non-trivial to do so. EDIT 1: Meh, apparently posting it here made me feel guilty and I had to push my search a bit more. I found the same article than Ankur post below. This is what I made, if anybody ever faces the same problem: $ sudo gvim /etc/dhcpcd.conf Add "nohook resolv.conf" at the tail of the file. $ sudo gvim /etc/resolv.conf Add to the file (OpenDNS servers): nameserver 208.67.222.222 nameserver 208.67.220.220 Or (Google DNS): nameserver 8.8.8.8 nameserver 8.8.4.4 Then, verify it worked (need package dnsutils): $ dig www.facebook.com ; <<>> DiG 9.9.1-P1 <<>> www.facebook.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16994 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www.facebook.com. IN A ;; ANSWER SECTION: www.facebook.com. 89 IN A 69.171.224.53 ;; Query time: 87 msec ;; SERVER: 208.67.222.222#53(208.67.222.222) ;; WHEN: Thu Jun 28 00:43:23 2012 ;; MSG SIZE rcvd: 61 See ;; SERVER: 208.67.222.222#53(208.67.222.222), it worked.

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• Unable to connect to SVN server on VPS : Subversion Configuration Problem

  - by Pritam Barhate

  Hello everybody, I purchased a VPS account (centos-5-x86_64) from Hostgator mainly for the purpose of setting up an online Subversion Server. This is the first time I am managing a VPS and my linux skills are not so great, but I have basic knowledge of the OS and have been using it on and off as desktop from last few years. So after foxing through a few tutorials online, as the first step I logged in using SSH root account provided by Hostgator and tried to run, yum install mod_dav_svn subversion As it turns out my account has Cpanel/WHM and since it some concept of easy apache straight forward procedure of yum install mod_dav_svn subversion won't work. After that I found out how it can be worked out by compiling the source and stuff. But the whole procedure looked long and scary. [I am just a linux nub]. so I decided I would just skip whole apache integration stuff and just access the server using svn:// protocol, anyways that's how I configure svn on our LAN. So I installed subversion using yum install subversion It installed fine. Then I created a folder /svn_repos/testproject and ran svnadmin create /svn_repos/testproject/ No Problems Using vi I changed svnserve.conf and passwd files for the repository and added a user with my name. Anonymous users don't have any access, authenticated users have write access. Then I started svnserve using svnserve -d then in same terminal window svn list svn://localhost/svn_repos/testproject Asks for authentication for realm, provided root password then for svn username and password. Provided both. The command returns nothing but exists properly. Returns nothing is understood I didn't import anything. But if try to access svn remotely using in another terminal: svn list svn://ip.add.of.server/svn_repos/testproject svn: Can't connect to host 'ip.add.of.server': Operation timed out Is what I get. Parallels Power Panel that I got from Hostgator reports that: The firewall is not active now. To activate the firewall, choose one of the firewall operation modes. So if firewall is not running and I can access svn using localhost, why the operation is timing out when I try to access svn from a remote machine? Experienced network admins please help. Thanks in advance. Also please suggest a good book which gives detailed information on configuring Dedicated servers + WHM and CPanel.

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• Windows 7 The boot selection failed because a required device is inaccessible 0xc000000f

  - by piratejackus

  I have a problem with my Windows 7, hardware : Acer 3820TG Operating Systems : Windows 7 and Ubuntu 10.04 dual Case: When I try to boot my windows 7 I see an error: "Window failed to start. A recent hardware or software change might be the cause. To fix the problem: 1.Insert.... 2. .... ... status : 0xc000000f info : The boot selection failed because a required device is inaccessible .... " I can't exactly remember what were my last actions on Windows. I already searched this error and applied the proposed solutions, I created a repair USB (because I don't have a CD-ROM nor a Windows 7 CD) such as; -repair operating system :it says it cannot repair it -checking disk (chkdsk D: /f /r) : it checks the disk without a problem or error and it takes pretty long (more than a hour). But when I restart, still the same error. -I didn't create a restore point so I pass this option -I don't have a system image -I tried to run windows recovery (I have a recovery partition) but there are just two options: 1- Format the operating system but retain user data (copies the files under users to c\backup folder, but when I searched deeper I found that there are some people who already tried this option and couldn't find their user files under backup directory). Plus, I have unfortunately just one partition D (it is a fault I know) because I use always Ubuntu. So this is not applicable in my situation 2- Format entire system (Windows). I keep my valuable data in windows but not in user folder. I was reaching them from Windows. -I tried to repair windows boot by: bootrec /fixMBR bootrec /fixBoot bootrec /rebuildBCD I lost all grub menu, and reinstalled it. - ubuntuforums.org/showthread.php?t=1014708&page=29 nothing changed, same error. I created a thread in microsoft forums - http://social.answers.microsoft.com/Forums/en-US/w7install/thread/69517faf-850a-45fd- 8195-6d4ed831f805 but I couldn't find a solution. Before I run chkdsk from usb repair disk I couldn't able to mount Windows (NTFS) partition from Ubuntu, I was getting "couldn't mount file system, error code 2". I tried to fix ntfs partition from ubuntu and got "segmentation fault". I also created a thread on ubuntuforums for this mount problem: - http://ubuntuforums.org/showthread.php?t=1606427 So, after chkdsk, I could enable to mount windows partition but all I see in this partition is chkdsk logs, no any other data. Now, I don't think I lost my data because I don't get any filesystem errors, just the boot section, but this log files under windows partition makes me afraid. I see that Microsoft developers don't have a solution yet for this error. If you need any information to get more idea I can give, maybe I miss some points or it could be complicated. Thanks in advance.

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• Malicious program changing my DNSs

  - by julio.alegria

  Some weeks ago I started having problems with my internet connection, it was extremely slow and suddently some websites (specifically gmail, facebook, youtube and twitter) started failing to connect, while the rest connect normally. Some days after, those same websites started showing me a message in portuguese: "Nova atualização disponível" whenever I tried to connect and a .exe file started downloading ("internet_update.exe" or something like that). That's when I freaked out! It was definitely a virus or something like that, but it was really weird because I never had a problem like that (I run Linux). So I turned on my old PC (running Windows XP) and it turned out it had the same problem! the same message was showed whenever I tried to connect one of those specific websites, while the rest loaded without problems. Even in my Android smarthphone the same message was showed. So it was obvious that the problem was not in a particular machine but in the router itself. So I started googling and I found some information, unfortunately I only found some in spanish, so I will make you a short summary: It is a new banking trojan developed specifically to infect and collect information from Brasilian banks. Apparently now it has expanded to Argentina and Peru. So how does it work? It spreads through social networks (videos, links, ...) and then it "takes control" of your internet connection by changing the values of your DNSs. More specifically, it changes the Primary DNS to one of this IPs: 108.170.13.38, 66.7.216.122 or 63.143.43.154 and the Secondary DNS to 8.8.8.8, this secondary DNS is actually the Google Public DNS, and it is configured this way so that your internet connection continue working properly and the user does not notice anything. The important part here is that because no download or install has been made in your machine, no antivirus will notice any change. After your DNSs have been changed, the trojan controls every single website you connect to and this way they steal your bank information. So after reading about this I accesed to my router and I restored my Primary and Secondary DNSs to their proper values, but one day after I had the same problem again. This is actually a 50% warning post - 50% help me! post. So, here comes the question: Is there any possible way to prevent my DNSs of being changed?

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