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• Update a DNS to a for a dynamic IP

  - by zobgib

  I want to use my schools connection as a place to host a small webserver but one problem I have run into is anytime my server reboots I am given a new IP inside the schools range. All of the schools IP are public and therefor I can access my computer directly over WAN just via the IP given in ifconfig. I would like to be able to give my computer a dns which is easy enough when I change the Arecords to match the current IP of my computer. The problem is if my computer ever reboots (my school regularly cycles power at night and over holidays) I am assigned a new IP and have to realize it then update the Arecords This is inconvenient and I figure there must be a better way to keep the DNS records updated either via a script or my own BIND server. That way if there is a power cycle I can still access the server via a Domain Name. If you have any direction to point me in it would be much appreciated. I am running Ubuntu 10.04 if that helps :).

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• What is the best objective way to measure language popularity trends? (What's better than TIOBE?)

  - by Eric Wilson

  The best way to get data on computer language popularity that I know is the TIOBE index. But everyone knows that TIOBE is hopelessly flawed. (If someone provides a link to support this, I'll add it here.) So is there any data on programming language popularity that is generally considered meaningful? The only other option I know is to look at the trends at indeed.com, which is inherently flawed, being based on job postings. It isn't like I would make a future language decision solely based on an index, but it might provide a useful balance to the skewed perspective one obtains by talking to ones friends and colleagues. To illustrate that bias, I'll point out that based on the experience of those I personally know, the only languages used professionally today (in order of popularity) are Java, C#, Groovy, JavaScript, Ruby, Objective C, and Perl. (Though it is evident that C, C++ and PHP were used in the past.) So my question is, everyone bashes TIOBE, but is there anything else? If so, can anyone explain how we know the alternative has better methodology? Thanks.

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• SPF records - what are the differences ?

  - by progeny

  I'm trying to set up an SPF record for my domain. I've read the RFC, been to Wikipedia, openspf.org, etc. but I'm still confused. What is the difference between 'a' and 'mx'? When do I use 'mx: rather than 'a:' or 'include:'? What's the point of '?all' (Neutral result) except for debugging? Why do so many people use '~all' (Softfail) instead of '-all' ? I've been to the Wizard (http://old.openspf.org/wizard.html) but I don't understand the questions.

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• SharePoint 2007 Enabling Incoming Email Error

  - by Cherie Riesberg

  Symptom: When configuring incoming e-mail, the e-mails come through just fine if the server name is in the e-mail address: [email protected] but when you change it to a vanity name [email protected], the message is bounced back and you get this error: Delivery has failed to these recipients or distribution lists: [email protected] Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this  message for you.    Please provide the following diagnostic text to your system administrator. The following organization rejected your message: servername01.fqdn.com.   Problem: The SharePoint server relay rejects the message because it doesn't recognize the name.  You have set it up in Exchange, but you need to set up an alias in the SMTP service on the SharePoint server;   Solution: Configure an Alias Domain An alias domain is an alias of the default domain. You can set up alias domains that use the same settings as the default domain. Messages that are received by the SMTP Service for an alias domain are placed in the Drop folder that is designated for the default domain. To configure an alias domain, follow these steps: Start IIS Manager or open the IIS snap-in. Expand Server_name, where Server_name is the name of the server, and then expand the SMTP virtual server that you want (for example, Default SMTP Virtual Server). Right-click Domains, point to New, and then click Domain. The New SMTP Domain Wizard starts. Click Alias, and then click Next. Type a name for the alias domain in the Name box, and then click Finish. Quit IIS Manager or close the IIS snap-in.

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• How to get Nvidia 555M working on Ubuntu 12.10 (drivers, optimus, cuda)?

  - by bluudz

  I'm trying for few days to get my GPU working properly on Alienware M14x with GPU NVidia 555M, but I have no luck at all. After fresh ubuntu install I did follow the guide here NVIDIA Optimus and Ubuntu 12.10 and istalled Bumblebee without problems. Tested glxspheres/optirun glxspheres both working fine. Now I was continuing to install CUDA as is said here How can I get nVidia CUDA or OpenCL working on a laptop with nVidia discrete card/Intel Integrated Graphics? but I'm getting: Driver: Not Selected Toolkit: Installation Failed. Using unsupported Compiler. Samples: Installation Failed. Missing required libraries. I did not select the driver as I though Bumblebee installed driver already. How should I proceed? And also at what point is the NVidia driver being installed and how can I try its working? Bumblebee seems to be installing the driver, CUDA wants to do the same, its all a bit confusing really. Sorry if its lame question, but I would really want to at least get graphic card and second screen working.. Thank you for any help.

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• Is it safe to operate a laptop without battery?

  - by leladax

  I know it's 'unsafe' in terms of data loss but I noticed motherboards still have some of their circuits on power when they are plugged in [e.g. a circuit that must wait for power-on signals is certainly one of them]. Hence, I wondered if it would increase the life of the laptop if the battery was simply off. Let alone that may also increase battery life, but that's the least of my concerns. Notice the main point is to plug it off on hibernate and have no power source whatsoever for the duration of being off (apart from the clock battery). (i.e. saving having to plug off the battery every time)

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• Dual boot UEFI Windows 7 and Ubuntu 12.04 (both 64 bits). W7 entry doesn't appear in GRUB

  - by Joe

  After trying to install both OS during 2 days, I'm confused and getting mad... I have SSD 128 GB and HDD 500 GB both empty. My laptop is Asus K55VM. BIOS support UEFI. What I have done: Install new SSD (Samsung 830 128GB) Use GParted on liveCD to create new table of partitions (GPT) and create 3 partitions (in the SSD) for different purposes: Partition 1: 80 GB (w7); Partition 2: 30 GB (Ubuntu 12.04 -Just / -); Partition 3: 10 GB unused (for future extesion of the other partitions) Install Windows 7 (with UEFI) in Partition 1. This create: /dev/sda1 - 100 MB for System (UEFI boot I guess) - FAT32 /dev/sda2 - 100 MB aprox. for MSR /dev/sda3 - 79.800 MB aprox. for Windows7 data In this point everything works fine. I have W7. Now I install Ubuntu 12.04 amd64 (with UEFI) as follows: Install / in Partition 2 - /dev/sda4 30 GB ext4, and in the hdd I install /home and swap. I select bootloader in /dev/sda1 (where it's supposed to be the UEFI boot). I install updates and reboot. Problem: Now just appears grub menu with Ubuntu entries and not Windows 7. Alternative solution found: When I turn on laptop, before loading GRUB I press ESC key and appear BIOS boot, so I can select to boot the Windows partition, Ubuntu partition, DVD, USB, etc... but I think is not the best way to boot different OS. I've tried: sudo update-grub2 with no success. What can I do??

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• Algorithm for grouping friends at the cinema [closed]

  - by Tim Skauge

  I got a brain teaser for you - it's not as simple as it sounds so please read and try to solve the issue. Before you ask if it's homework - it's not! I just wish to see if there's an elegant way of solving this. Here's the issue: X-number of friends want's to go to the cinema and wish to be seated in the best available groups. Best case is that everyone sits together and worst case is that everyone sits alone. Fewer groups are preferred over more groups. Sitting alone is least preferred. Input is the number of people going to the cinema and output should be an array of integer arrays that contains: Ordered combinations (most preferred are first) Number of people in each group Below are some examples of number of people going to the cinema and a list of preferred combinations these people can be seated: 1 person: 1 2 persons: 2, 1+1 3 persons: 3, 2+1, 1+1+1 4 persons: 4, 2+2, 3+1, 2+1+1, 1+1+1+1 5 persons: 5, 3+2, 4+1, 2+2+1, 3+1+1, 2+1+1+1, 1+1+1+1+1 6 persons: 6, 3+3, 4+2, 2+2+2, 5+1, 3+2+1, 2+2+1+1, 2+1+1+1+1, 1+1+1+1+1+1 Example with more than 7 persons explodes in combinations but I think you get the point by now. Question is: What does an algorithm look like that solves this problem? My language by choice is C# so if you could give an answer in C# it would be fantastic!

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• Running Outlook from VB with multiple email addresses [migrated]

  - by Mac

  I am sending emails from my VB6 system and I am having problems with sending a single email to various email addresses. The code is as follows: On Error Resume Next Err.Clear Set oOutLookObject = CreateObject("Outlook.Application") If Err <> 0 Then MsgBox "Email error. Err = " & Err & " Description = " & Err.Description EmailValid = "N" Exit Function End If Set oEmailItem = oOutLookObject.CreateItem(0) If Err <> 0 Then MsgBox "Email error. Err = " & Err & " Description = " & Err.Description EmailValid = "N" Exit Function End If With oEmailItem .Recipients.Add (SMRecipients) .Subject = SMSubject .Importance = IMPORTANCENORMAL .Body = SMBody For i = 1 To 10 If RTrim(SMAttach(i)) <> "" Then .attachments.Add SMAttach(1) 'i) Else Exit For End If Next i .send End With If Err <> 0 Then MsgBox "Email error. Err = " & Err & " Description = " & Err.Description EmailValid = "N" Exit Function End If ''' .Attachments.Add ("c:\temp\test2.txt") Set oOutLookObject = Nothing I have set SMRecipients to a single email address and it is fine but when I add more addresses seperated by semicolons or spaces it only sends to the original address. My system runs under XP. Another point is that it use to find the addresses in the Outlook Address book and where they wetre not specific enough it would display the matching addresses for selection of the correct one. It no longer does this.

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• Oracle EZConnect in Mediawiki

  - by raindog308

  Mediawiki supports Oracle and I'm trying to configure it in the installer. The installers says you can use EZConnect...something like: user/pass@//server.example.com/dbname or since the installer has fields elsewhere for user/pass server.example.com/dbname The installer includes a link to the EZConnect docs: http://docs.oracle.com/cd/E11882_01/network.112/e10836/naming.htm. All the examples in that doc include a forward slash. But every combination I've tried results in an error like this: Invalid database TNS "sever.example.com/service_name". Use only ASCII letters (a-z, A-Z), numbers (0-9), underscores (_) and dots (.). I can't find any examples of EZConnect that don't include a forward slash. That error is from Mediawiki, not Oracle. I'm tailing the listener log and there is no connection made - Medaiwiki is returning an error without trying to connect. I'm using php OCI8 with the Oracle instant client. I don't have a tnsnames.ora setup for this client - which is kind of the point of EZConnect. I did write a test php script that connects via oci_connect just fine. Has anyone configured Mediawiki to use Oracle with EZConnect? If so, what did you use in the installer?

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• Google Chrome Automatically Save Passwords

  - by benhc911

  I have seen, and at one point implemented, methods of modifying firefox's password manager popup such that it would automatically save usernames and passwords without prompt. I was wondering if there is a similar feature for Chrome. I just recently switched to chrome and it is one of a few features/modifications that didnt survive the transition, and while I am moderately capable in programming in certain languages (C+, visual etc) I don't really feel confident enough to muck around unguided. For anyone that is particularly interested, the other features I miss are things such as the slash based 'quick search' in firefox... and I am currently annoyed by a different right click menu order for opening in new tabs and new windows (the reverse of firefox). Any help would be greatly appreciated!

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• Is Exchange protected from/allow back dated emails?

  - by David

  Does Exchange Server adequately protect against backdating items in a mailbox folder? I want to determine from an auditing perspective what level of risk exists/what trust can be put into Exchange database records. Is there a (mis)feature that allows end point users to modify the sent/recieved date fields on their own messages? Is there a reasonable way short of hand editing the files for an Exchange Server admin to make such a change? And most importantly: Is there any kind of "sequence number" that we could use to audit Exchange records for evidence of date manipulation (ex. msg100 = Dec 15, msg101 = Dec 10, msg102 = Dec 16)

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• Apple Wireless (aluminium) Keyboard on Windows

  - by Dave Arkell

  I have an apple wireless keyboard which I am using with my windows pc and it works excellently, and looks superb. It all connects fine (particularly with a flashed dbt-120). However, I haven't had great success with getting all those useful keys to work with the 'fn' key. I've been using uawks as a way to get it working, but it doesn't always work. Has anyone had success with any other tools to get the fn key working (and therefore creating shortcuts to 'End', 'Home', 'Break', 'Pgup', etc? I should point out that this is not a mac computer, it is a plain old pc.

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• Restart single uWSGI application (when it's in emperor mode)

  - by Oli

  I'm running uWSGI in emperor mode to host a bunch of Django sites based on their individual configs. These are supposed to update when it detects a change in the config file and this largely works when I just touch uwsgi.ini the relevant file. But occasionally I'll mess something up in the Django site and the server won't load. Yeah, yeah, I should be testing better but that's not really the point. When this happens, uWSGI seems to mark the site as dead and stops trying to run it (seems to make sense). Even after I fix the underlying issue, no amount of touching will get that site's uWSGI process up and running. I have to reload the whole uWSGI server (knocking dozens of sites out at once for a few seconds). Is there a way to force uWSGI to just reload one of its sites?

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• Windows XP not starting up anymore (BSOD)

  - by Richard

  When I tried to start my computer running Windows XP yesterday, as I turned on the screen it was stuck at the "Welcome" screen. I had to reset it. After that, I got stuck at the point where the BIOS should load the OS - I turn on the PC, the Motherboard and BIOS post message shows up, then the blinking "thing" in the top left corner shows up 2 seconds, then everything is black. After I let it run for some time in that mode, it automatically restarts. I'm writing this here from a Ubuntu 9.10 Live CD. What can I do to fix this? How can I find out what is wrong? I'm a programmer and okay with doing (very) advanced things in that terms, so if you know something just tell me and I'll try

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• What credentials should I use to access a Windows share?

  - by JMCF125

  H
  i, I have installed Samba and CIFS and all that, followed a bunch of tutorials, but still I can't access a share in the separate Windows 7 machine. Before I could access a share in Ubuntu from Windows, but although now I can't for whatever reason; the error of the attempt to mount the Windows share is the same: 13, asking for credentials (the computer with Windows is off now, but I can add the exact error message later). In /etc/fstab I have: # ... (help info) ... # <file system> <mount point> <type> <options> <dump> <pass> # ... (mounting points that don't matter for the question) ... //192.168.1.2/C\:/Users/Public/Documents /srv/Z\:/ cifs user=guest,password=,uid=1000,iocharset=utf8 0 0 I also tried options such as username=guest,uid=1000,iocharset=utf8 and guest,uid=1000,iocharset=utf8, which, of course, don't work. What user am I supposed to use? (user=user; username=user; my credentials in the Windows and Ubuntu machines do not work, at least with the syntax I tried - similar to this). Even if this worked it's not actually what I want. I wanted to setup an authentication for any one trying to access the drive (it's currently 777, for the Linux share as well) and put a limit/quota on the share's use (as I see Z:on Windows, it allows for the entire C:drive to be filled). Thank you in advance. I'd be glad if you suggested a way to do this even without the last paragraph.

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• Why do Google search results include pages disallowed in robots.txt?

  - by Ilmari Karonen

  I have some pages on my site that I want to keep search engines away from, so I disallowed them in my robots.txt file like this: User-Agent: * Disallow: /email Yet I recently noticed that Google still sometimes returns links to those pages in their search results. Why does this happen, and how can I stop it? Background: Several years ago, I made a simple web site for a club a relative of mine was involved in. They wanted to have e-mail links on their pages, so, to try and keep those e-mail addresses from ending up on too many spam lists, instead of using direct mailto: links I made those links point to a simple redirector / address harvester trap script running on my own site. This script would return either a 301 redirect to the actual mailto: URL, or, if it detected a suspicious access pattern, a page containing lots of random fake e-mail addresses and links to more such pages. To keep legitimate search bots away from the trap, I set up the robots.txt rule shown above, disallowing the entire space of both legit redirector links and trap pages. Just recently, however, one of the people in the club searched Google for their own name and was quite surprised when one of the results on the first page was a link to the redirector script, with a title consisting of their e-mail address followed by my name. Of course, they immediately e-mailed me and wanted to know how to get their address out of Google's index. I was quite surprised too, since I had no idea that Google would index such URLs at all, seemingly in violation of my robots.txt rule. I did manage to submit a removal request to Google, and it seems to have worked, but I'd like to know why and how Google is circumventing my robots.txt like that and how to make sure that none of the disallowed pages will show up in their search results. Ps. I actually found out a possible explanation and solution, which I'll post below, while preparing this question, but I thought I'd ask it anyway in case someone else might have the same problem. Please do feel free to post your own answers. I'd also be interested in knowing if other search engines do this too, and whether the same solutions work for them also.

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• Oracle redo log performance degradation when inserting

  - by Aldarund

  I have a oracle 11g database. I'm testing in for inserts. The database running in noarchive mode. I have 3 redo log configured, each 2gb. I'm trying to insert data into test table. At begin it goes fine with 15k ins/second. I make a commit after 200 inserts. But after about 1.3m inserted records it become really slow, about 1-2k ins/second. As i noticed in resource explorer at this point we have filled all redo logs and so the inserts from this points work slow. So my question is why it become so slow when it fills redo logs, even if i commit each 200 records. And how this situation can be fixed ( except the turning off logging completely at inserts)

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• LDAP authentication: Windows Server2k3 vs. 2k8

  - by wolfgangsz

  We have around 70% linux users, all of which are configured to authenticate against Active Directory through LDAP. In order for this to work, we used the "Windows Services for Unix" under Windows Server 2003, and it all works fine. We are now at a point where the server running this contraption is getting a bit tired and will be replaced with a newer machine, running Windows Server 2008 (where the relevant services such as user name mapping and password changes, etc., are integrated with the OS). And here's the rub: If a new user is configured through the Win2k3 server, then it all works fine. If the same thing is done through the Win2k8 server, then : The ADS plugin on the 2k3 server does not recognize it and behaves as if the UNIX attributes were never set. The user cannot authenticate against ADS using LDAP. Has anybody encountered this problem? If so, how did you overcome this? If you need any additional information to provide further help, just ask and I shall provide it.

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• The Real Value Of Certification

  - by Brandye Barrington

  I read a quote recently by Rich Hein of CIO.com "Certifications are, like most things in life: The more you put into them, the more you will get out." This is what we tell candidates all the time. The real value in obtaining a certification is the time spent preparing for the exam. All the hours spent reading books, practicing in hands-on environments, asking questions and searching for answers is valuable. It's valuable preparation for the exam, but it's also valuable preparation for your future job role and for your career. If your goal is just to pass an exam, you've missed a very important part of the value of certification.We receive so many questions through different forms of social media on whether or not certification will help candidates get jobs or get better jobs. Surveys conducted by us and by independent entities all point to the job and salary benefits of certification. However, a key part of that equation is whether a candidate can actually perform successfully in a job role. If preparation time was used to practice and learn and master new skills rather than to memorize a brain dump, the candidate will probably perform successfully in their job role, and job opportunities and higher salary will likely follow. Candidates who do not show that initiative, will not likely reap the full benefits of certification.Keep this in mind as you approach your next certification exam. You are preparing for a career, not an exam. This may help you to be more appreciative of the long hours spent studying!

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• Are scheduled job servers the right choice for a time sensitive game engine?

  - by maple_shaft

  I am currently architecting and designing an exciting new web application that will be entering into some areas that I have very little experience in, game development. The application is not necessarily a game, but there are some very time sensitive tasks and scheduled jobs that a server will need to run to perform game related activities (Eg. New match up starts at noon every day for a 12 day tournament, updating scoreboards at 5pm every day, etc...) In the past I have typically used cron jobs with the Quartz Scheduler running within a web application server, but I know that this isn't likely a scalable solution for the truly massive userbase that management is telling me to expect (Granted they are management and are probably highly optimistic about this) and also for how important the role of these tasks are in this web application. The other important thing I want to consider is that I want to avoid SPOF (Single Point Of Failure). If the primary job server goes down, another job server should be able to successfully run the job in its place. I suppose this can be done appropriately record locking and database transactions. My question is if scheduled jobs like CRON running on a web application server are a wise design choice given the time sensitive game tasks of this application, or is there something more appropriate for running a scalable game engine parallel to the web application servers?

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• How to fix missing icons in the taskbar and start menu?

  - by adrianbanks

  I installed Visual Studio 2012 yesterday and during the install my path somehow got screwed up1. Since then, the icons for applications that are part of Windows are the default "unknown" icon, but other icons are fine. The applications that the shortcuts link to launch fine when the icons are clicked on. Taskbar: Start Menu: I have fixed my path, but the icons still show incorrectly. Any ideas on how to flush what appears to be a set of cached icons? 1 Something took a path of A;B;C;D; and turned it into A;B;C;D;A;B;C;D;E;F; - duplicating a large part of it to that point that no more characters were available to type in the edit box in system properties. This had the side-effect of Windows reporting that it couldn't find %windir%.

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• Should all my files be stored on my shared partition?

  - by James

  I am setting up a tripple boot HD and was going to use a 4th partition to share files between OS's. I was wondering if there is any point in having much space on each OS partition to store files or if I just make the shared partition big and put everything on that? Is there any difference in speed between accessing files on the shared partition vs the native files? Are there any other benefits/disadvantages of having files on either the native/shared partition? EDIT: OS's in question are Windows 7, Ubuntu 12.04, and OS X 10.7.4.

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• Ubuntu 12.04 menu bar, nautilus, terminal, and gtk themes not working after installation of Gimp 2.8

  - by Chris

  I installed gimp2.8 from this ppa: ppa:otto-kesselgulasch/gimp after that, my system began having problems. This is my thought process in trying to fix what's happened and the order in which it happened: I noticed the menu bar at the top changed from an opaque black to perfectly clear and the titles of applications and the hidden buttons reacted slowly. No big deal, restarted to see if it fixed it. It didn't, in fact, when the logon screen came up, the password field was grey and boxy like a default windows 98 theme (that's the best I can describe it) as were all the option buttons for gtk programs. I open terminal to try and reinstall gtk, but the terminal is just a black screen with no ability to input commands. I go to a tty and I reinstalled gtk3 and gtk2 (I have both on my system. I don't think they're in conflict, they hadn't been before hand). I restarted. Nothing doing. Log in, nautilus isn't placing icons on my desktop. I click the launcher. It flashes, but no window opens. Try to open by Alt+f2, nothing. I purge ubuntu-desktop, restart, reinstall ubuntu-desktop. Nothing. I have no clue what to do at this point so I'm asking for any help diagnosing the problem and fixing it.

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• Use only external monitor at screen's native resolution

  - by joaoc

  My laptop's screen lamp just died (I can see content on the screen if I point a light at it) and I was using it with an external monitor. I can switch from extended desktop to mirrored mode but, and here is where I need help, the resolutions don't match. The laptop's resolution is 1600x1200 and the external monitor is 1680x1050. I am ok with just using one screen ATM but I would like for it to at least use the native resolution of the external monitor. This is Windows XP and under Monitor settings I only get the resolutions for the original monitor under mirrored mode. How can I force the screen into a resolution not supported by the laptop screen but that is a native resolution for the external monitor?

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