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• how to be a web developer [closed]

  - by David

  Well, I'm 34 years old, and I have a master degree in computer science, for some how I cannot get a job as a programmer when I was younger, so I got a job related to computer. Recently I work in content management system, and updating the content of web portals. I'm trying to be a web programmer, so I started learning the techniques for web development, and CMS. I have a good knowledge of PHP and Wordpress, but I have a problem when I apply for a job I got the answer "sorry, you have no experience!" how can I solve that, and get a career in programming and web development?

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• Xubuntu 14.04 will not boot after preseed installation

  - by Christian

  I recently set up Xubuntu 14.04 installation using preseed, and ran into a couple of problems during boot time. At first, right after the installation completed during first boot the system complained about /tmp not being mounted and did not proceed any further. I was able to fix that problem by making an entry for /tmp in /etc/fstab like so: tmpfs /tmp tmpfs optional,nodev,nosuid 0 0 This worked for a while (and still does for workstations that are already running), but newly installed machines are broken. They do not complain like before, but take forever to boot (2h) and it seems the root partition is mounted read only and you cannot do anything useful with the system. Any ideas on what to do? You can find the presseed file here Thanks in advance Update: If I get it to boot once via some magic in rescue mode (like simply mounting the root partition read-write, then resume boot) it will work forever. While this is a workaround, it is no option to do this for every installation.

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• Xubuntu 14.04 black screen after monitor off/on

  - by Sampo Smolander

  I have a HP desktop machine with Ubuntu 14.04, with also Xubuntu and Gnome desktops installed. I mostly use the Xubuntu session. When using the Xubuntu session, when I power off my monitor, and power it back on, the screen stays black and I cannot do any work. With ctrl-alt-f6 I can open another virtual terminal, and then the screen works again, but if I to go back to the desktop session with ctrl-alt-f7, all I have is a black screen. But, if I login to Unity (the Ubuntu default session), or to Gnome, and turn the monitor off and back on, everything works ok. Also, if I log out, and while in the lightdm greeter, turn the monitor off and back on, everything works ok. What could be the cause for this, and how to fix this?

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• Ubuntu One under KDE

  - by Andy Goss

  Currently, while Ubuntu One can be installed under KDE, Dolphin does not know about it, so it cannot set folders other than Ubuntu One to sync. There is a command line utility, "u1sdtool", which performs most if not all the functions you need. Setting the keyring password to be the same as your login won't prevent Ubuntu One asking you for it again on login. If you want to change it, install Seahorse, look for it in your menus as "Passwords and Keys", and right click over "Passwords: default", then select "Change Password". The various deleting tricks I've read about don't work for me. There is an ubuntuone-client-kde being developed, but no clue as to when it will appear in a stable repo. Any further advice will be welcomed by me and doubtless a few other KDE users.

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• St. Louis IT Community Holiday Party

  - by Scott Spradlin

  The St. Louis .NET User Group is hosting a holiday party this year for the very first time in our 10 year history. The event will be held at the Bottleneck Blues Bar at the Ameristar Casino in St. Charles. It will be an open house style event meaning you can drop by any time from 6:00pm to 9:00pm and enjoy the Unhandled Exceptions...the band that played at the St. Louis Day of .NET 2011. $5.00 at the door gets you in and goes to support a local charity The Backstoppers. If you cannot come, you can make a donation online. Details at our group web site HTTP://www.stlnet.org

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• Rewrite Generic URLs into real URLs on Google Analytics

  - by valdroni

  I have an iPhone app for a forum which also has a limited Google Analytics reporting. This app reports the page views in following generic form: /forum/67 /thread/29036 etc... The numbers above represent forum and thread ID's I am trying to set an Advanced filter, which will rewrite/report the page views in Google Analytics in following form: http://www.mysite.com/forum-67.html http://www.mysite.com/thread-29036.html Can someone please assist me in creating an Advanced Google Analytics filter which will enable me to see URL's so they can be live and send to correct page. Is there another method to achieve what I'm looking for ? Obviously there will be a need for some RegExp matches, but I cannot get around it.

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• Unity Desktop Displays strange lines

  - by Alex Holsgrove

  Didn't quite know what title to give this problem, but hopefully the screenshot will explain more. I am running a Samsung R60+ laptop on Ubuntu 13.10 with a Radeon X1250 GPU. After I login and the Unity desktop shows, I can see these strange lines at the top of the screen. I presumed it was perhaps a driver issue and found this article to see if I could resolve the issue: https://help.ubuntu.com/community/RadeonDriver I cannot get on with Unity at all (where are all of the menus gone!) so perhaps reverting back to Gnome may be a solution in my case? I'd welcome any ideas please.

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• Game Code Design for Rendering

  - by kuroutadori

  I first created a game on the iPhone and I'm now porting it to Android. I wrote most of the code in C++, but when it came to porting it wasn't so easy. The Android way is to have two threads, one for rendering and one for updating. This due to some devices blocking when updating the hardware. My problem is that I am coming from the iPhone. When I transition, say from the Menu to the Game, I would stop the Animation (Rendering) and load up the next Manager (the Menu has a Manager and so has the Game). I could implement the same thing on Android, but I have noticed on game ports like Quake, don't do this - as far as I can tell. I have learnt that I cannot just dynamically add another Renderer class the the tree because I will probably get a dequeuing buffer error - which I believe to be a problem with the OpenGL ES side. So how is it done?

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• copy & paste in VirtualBox remote console when running headless

  - by katsumii

  One can run VirtualBox guest in "headless" mode and access it using Remote Destkop Protocol(RDP) client.This is typical when VBox server is installed on Linux/Solaris where X-window stuff is not installed and users useWindows to access the VM.So, one can install OS into VBox guests using Remote Desktop client.(e.g. mstsc.exe)Here's the setting. One lesser known feature here is that you can copy&paste into and out-of VM guest and your client.Apparently, "VMware Workstation" still doesn't support it. VMware Workstation Documentation CenterYou cannot copy and paste text between the host system and the guest operating system   

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• Google SMTP relay sending limits

  - by Gavin

  I'm considering using Google Apps for email with my company domain and for sending emails to customers from my website using SMTP. On Google's website it says the following: Limits for registered Google Apps users A registered Google Apps user cannot relay messages to more than 2,000 recipients per day. Limits per domain Per-domain sending limits are determined by the number of users in your Google Apps account. There are two per-domain limits: The maximum number of recipients allowed per domain per day is approximately 130 times the number of users in your Google Apps account. The maximum number of recipients allowed per domain in a 10 minute window is approximately 9 times the number of users in your Google Apps account. Additionally, the maximum number of recipients allowed per domain per day for accounts not yet paid for during the first month of service is 100. If I'm a single user, with a single domain, then does that mean I can only email 130 people a day using SMTP? That limit seems low.

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• Ubuntu installation error on a windows machine

  - by Rahul

  Was trying to install Ubuntu from a CD on a machine which already has windows on it, choose the option of "Resize IDE1 master (hda) and use freed space" during the "Install the base system" step. After that i get the error- "Unable to install initrd-tools. An error was returned while trying to install the initrd-tools package into the target system. Check /target/var/log/bootstrap.log for details. The problem is one one hand i cannot proceed with the complete installation and on other hand if i remove the CD, am not able to boot windows as it says No bootable device. Would highly appreciate for any recommendations.

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• An error has occurred when creating debian packaging

  - by Clepto

  i execute quickly share and i get Launchpad connection is ok ........ Command returned some WARNINGS: ---------------------------------- WARNING: the following files are not recognized by DistUtilsExtra.auto: mangar/.bzr/README mangar/.bzr/branch-format mangar/.bzr/branch/branch.conf mangar/.bzr/branch/format mangar/.bzr/branch/last-revision mangar/.bzr/branch/tags mangar/.bzr/checkout/conflicts mangar/.bzr/checkout/dirstate mangar/.bzr/checkout/format mangar/.bzr/checkout/views mangar/.bzr/repository/format mangar/.bzr/repository/pack-names ---------------------------------- An error has occurred when creating debian packaging ERROR: can't create or update ubuntu package ERROR: share command failed Aborting the previous time i run the command everything worked! the previous time i was using ubuntu but now i am using linux mint 13... i get the same error with quickly package! i need to package my app for the contest.. edit: now i get this too ---------------------------------- ERROR: Python module helpers not found ERROR: Python module Window not found ERROR: Python module mangarconfig not found ERROR: Python module Builder not found those files exist in the package_lib folder, why it cannot find them?

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• IIS crashes with unhandled exception in ASP.NET

  - by SnowCrash

  We had an issue recently with an unhandled exception in an ASP.NET C# application bringing down IIS and all application pools that it was hosting. IIS Manager was unable to restart or stop/start the service and I was unable start IIS again after killing w3wp.exe in the task manager. A system reboot restored IIS to a running state; as a primarily Linux admin, I generally consider an unplanned system reboot to resolve a software error to be an act of high heresy. Is there a way to "harden" IIS so that a faulting application does not affect anything but the request that exposes the fault? Some details on the server and application fault. IIS: 7.5 .NET: 4.0 Windows Server 2008 R2 Faulted on call to System.Net.Dns.Resolve() with a url pointing to a non-existant domain as the argument. (I'm aware that this method is deprecated but the point that a page code issue shouldn't bring down the server still stands) The exception generated was SocketException. The faulting module according to event viewer was KERNELBASE.dll The issue was resolved by wrapping the call in a try-catch, logging the exception and displaying some generic content on the page. I'm hoping that I missed something in the IIS config that would switch it to "production" mode or something.

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• Redirecting a subdomain from Wordpress.com to an external web address

  - by user127236

  I have a question about redirecting a subdomain of a blog hosted on Wordpress.com to an external URL. Given the following: 1) I own a domain name foobar.com purchased from another registrar (not from Wordpress.com). 2) I have purchased the Custom Domain option on Wordpress.com, and have completed the configuration to make foobar.com resolve to foobar.wordpress.com. 3) I will establish an external site for a store, such as store.yahoo.com/foobar. 4) I want to redirect the subdomain store.foobar.com to store.yahoo.com/foobar. How do I set up the Custom DNS records within Wordpress.com to accomplish this subdomain redirection, while leaving foobar.com pointed to my Wordpress blog? I suspect that the CNAME directive is involved, but I cannot figure out the required syntax. Thanks... JGB

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• Traffic shaping on Linux with HTB: weird results

  - by DADGAD

  I'm trying to have some simple bandwidth throttling set up on a Linux server and I'm running into what seems to be very weird stuff despite a seemingly trivial config. I want to shape traffic coming to a specific client IP (10.41.240.240) to a hard maximum of 75Kbit/s. Here's how I set up the shaping: # tc qdisc add dev eth1 root handle 1: htb default 1 r2q 1 # tc class add dev eth1 parent 1: classid 1:1 htb rate 75Kbit # tc class add dev eth1 parent 1:1 classid 1:10 htb rate 75kbit # tc filter add dev eth1 parent 1:0 protocol ip prio 1 u32 match ip dst 10.41.240.240 flowid 1:10 To test, I start a file download over HTTP from the said client machine and measure the resulting speed by looking at Kb/s in Firefox. Now, the behaviour is rather puzzling: the DL starts at about 10Kbyte/s and proceeds to pick up speed until it stabilizes at about 75Kbytes/s (Kilobytes, not Kilobits as configured!). Then, If I start several parallel downloads of that very same file, each download stabilizes at about 45Kbytes/s; the combined speed of those downloads thus greatly exceeds the configured maximum. Here's what I get when probing tc for debug info [root@kup-gw-02 /]# tc -s qdisc show dev eth1 qdisc htb 1: r2q 1 default 1 direct_packets_stat 1 Sent 17475717 bytes 1334 pkt (dropped 0, overlimits 2782 requeues 0) rate 0bit 0pps backlog 0b 12p requeues 0 [root@kup-gw-02 /]# tc -s class show dev eth1 class htb 1:1 root rate 75000bit ceil 75000bit burst 1608b cburst 1608b Sent 14369397 bytes 1124 pkt (dropped 0, overlimits 0 requeues 0) rate 577896bit 5pps backlog 0b 0p requeues 0 lended: 1 borrowed: 0 giants: 1938 tokens: -205561 ctokens: -205561 class htb 1:10 parent 1:1 prio 0 **rate 75000bit ceil 75000bit** burst 1608b cburst 1608b Sent 14529077 bytes 1134 pkt (dropped 0, overlimits 0 requeues 0) **rate 589888bit** 5pps backlog 0b 11p requeues 0 lended: 1123 borrowed: 0 giants: 1938 tokens: -205561 ctokens: -205561 What I can't for the life of me understand is this: how come I get a "rate 589888bit 5pps" with a config of "rate 75000bit ceil 75000bit"? Why does the effective rate get so much higher than the configured rate? What am I doing wrong? Why is it behaving the way it is? Please help, I'm stumped. Thanks guys.

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• Testing for disk write

  - by Montecristo

  I'm writing an application for storing lots of images (size <5MB) on an ext3 filesystem, this is what I have for now. After some searching here on serverfault I have decided for a structure of directories like this: 000/000/000000001.jpg ... 236/519/236519107.jpg This structure will allow me to save up to 1'000'000'000 images as I'll store a max of 1'000 images in each leaf. I've created it, from a theoretical point of view seems ok to me (though I've no experience on this), but I want to find out what will happen when there will be directories full of files in there. A question about creating this structure: is it better to create it all in one go (takes approx 50 minutes on my pc) or should I create directories as they are needed? From a developer point of view I think the first option is better (no extra waiting time for the user), but from a sysadmin point of view, is this ok? I've thought I could do as if the filesystem is already under the running application, I'll make a script that will save images as fast as it can, monitoring things as follows: how much time does it take for an image to be saved when there is no or little space used? how does this change when the space starts to be used up? how much time does it take for an image to be read from a random leaf? Does this change a lot when there are lots of files? Does launching this command sync; echo 3 | sudo tee /proc/sys/vm/drop_caches has any sense at all? Is this the only thing I have to do to have a clean start if I want to start over again with my tests? Do you have any suggestions or corrections?

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• Xen domain migration locking problem

  - by brodie

  I am trying to live migrate a VM (domain) between two Xen servers. I have xen locking (xend-domain-lock = yes) configured with a ocfs2 shared storage between them. This locking is working fine. If I try to start up the VM on the secondary server it refuses to start (which is correct). The problem I am having is when trying to do live migration, it seems like it is trying to remove the lock twice. The first lock it removes is for "domain test", the second is for "migrating-test" which does not exist. Should their be a lock for this "migrating-test" VM? These are the relevant options in the xen config file: (xend-relocation-server yes) (xend-relocation-port 8002) (xend-relocation-address '') (xend-relocation-hosts-allow '') (xend-domain-lock yes) (xend-domain-lock-path /var/lib/xen/lock) This is the section of the log: [2010-06-10 10:45:57 14488] DEBUG (XendDomainInfo:4054) Releasing lock for domain test [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:474) SUSPEND shinfo 000c6ceb [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:474) delta 21ms, dom0 95%, target 0%, sent 57Mb/s, dirtied 173Mb/s 111 pages 4: sent 111, skipped 0, delta 6ms, dom0 100%, target 0%, sent 606Mb/s, dirtied 606Mb/s 111 pages [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:474) Total pages sent= 131295 (0.99x) [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:474) (of which 0 were fixups) [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:474) All memory is saved [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:474) Save exit rc=0 [2010-06-10 10:45:57 14488] INFO (XendCheckpoint:123) Domain 22 suspended. [2010-06-10 10:45:57 14488] DEBUG (XendDomainInfo:2757) XendDomainInfo.destroy: domid=22 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2227) Destroying device model [2010-06-10 10:45:58 14488] INFO (image:567) migrating-test device model terminated [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2234) Releasing devices [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2247) Removing vif/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:1137) XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2247) Removing vkbd/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:1137) XendDomainInfo.destroyDevice: deviceClass = vkbd, device = vkbd/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2247) Removing console/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:1137) XendDomainInfo.destroyDevice: deviceClass = console, device = console/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2247) Removing vbd/51712 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:1137) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51712 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:2247) Removing vfb/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:1137) XendDomainInfo.destroyDevice: deviceClass = vfb, device = vfb/0 [2010-06-10 10:45:58 14488] DEBUG (XendDomainInfo:4054) Releasing lock for domain migrating-test [2010-06-10 10:45:59 14488] ERROR (XendDomainInfo:4070) Failed to remove unmanaged directory /var/lib/xen/lock/b01515ae-9173-03cb-0cb7-06f3dfbede8b.

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• XNA Transparency depending on drawing order?

  - by DarthRoman

  I am drawing two 3D objects, both of them can fade from opaque to transparent independently, and they can intersect between them (so you cannot say when one of them is before the other one). Look at the image for a better understanding (one of the object is a terrain and the other one an area): Now, if I apply transparency to both of them, and draw the terrain before the area, the terrain is not transparent respecting to the area, but the area is: And finally, if I draw the area before the terrain, then the area is not transparent respecting of the terrain: QUESTION: How can I make all the objects transparent to the rest of objects without depending on the drawing order?

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• Disk Partitioning problem with fdisk.

  - by MA1

  Currently i am using fdisk to create/resize windows partitions. Following is a sample input script to fdisk to create/resize windows partitions: fdisk /dev/sda < partInput the contents of partInput are as follows: d #delete the partition 3 #partition number to be deleted n #add a new partition p #primary: type of new partition 3 #new partition number 18804 #start cylinder of new partition 77433 #end cylinder of new partition t #change the type of partition 3 #partition number whose type(filesystem) is to be changed 7 #HPFS/NTFS: partition type(filesystem) n #add a new partition p #primary: type of partition 77434 #first cylinder of new partition 77825 #end cylinder new partition w #write all the above changes As you see in the above input we are using cylinders for start and end. Earlier i am using sectors as unit and everything is working fine but getting problems when partitioning a 1.5TB hard drive. Then i changed the unit to cylinders but it is working on some machines not all. On some machines fdisk failed to create the partition table correctly. So, i am thinking to move to parted if there is no way to do the above using fdisk. Please also tell me how to correctly convert sectors to cylinders? How to perform all the above steps using parted without losing the data OR how to use fdisk correctly?

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• Absorbtion 2d image effect

  - by Ed.

  I want to create a specyfic 2d image effect. It consists in modifying a sprite so it looks like it is being zoomed to a point or "absorbed" by that point. I'm not really sure what is the technical name of this effect so I cannot explain it correctly. Here you can see a video of what I'm talking about, it is the effect when the character absorbs the three glyphs. http://www.youtube.com/watch?v=PIo-GddsMcU&t=4m45s What is the name of this effect? How can I implement it with XNA for 2D textures/sprites?

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• Easiest solution to setup payments for a conference registration page?

  - by Keith G

  I've got a fair amount of website development experience, but I've been asked to setup a conference registration page in short order. However, I have absolutely zero experience with shopping carts, payment processing, etc. What is the absolutely quickest and easiest way to get this thing up and running? Here are my criteria: Site is currently hosted on Godaddy.com and someone has suggested using their QuickCart We cannot use any option that visits the paypal.com domain because it has been blocked my a large segment of the potential audience (on a military base). Need a $0 option for speakers Cancellations can be accepted, so maybe something that could handle that would be a bonus There is no "product" other than a confirmation that they have registered for the conference.

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• How do I fix gnome shell themes?

  - by Chris

  This is my fifth full format and install of Ubuntu in under a month. I finally have my Gnome 3 desktop working again, but again, the Gnome shell themes is not select-able. I have asked the question of how to fix this common issue before, but I have seen no positive resolution. Does anybody know of a simple fix? This is a common issue and I have seen hundreds of postings related to it, but other users only seem to get half-way answers also and it goes unresolved. Would it be advisable to completely purge Gnome desktop and reinstall? If so how would I do this? I cannot use any extensions if the shell is not working, so I am desperately seeking resolution for the issue. Thanks in advance.

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• 3+ monitors, nvidia + intel graphics

  - by gozzilli

  I have seen lots of different posts on this issue, but I cannot figure out what to do. I hope we can collect the available information in one place, so that they can be useful for others. Is it possible to have multiple (3+) monitors running on two different graphics cards? I have 1x nVidia GeForce GTX 550 with 2 DVI ports and 1x Intel integrated graphics, with 2 DVI ports. I understand that they would be running on different instances of X servers. Is that correct? Could someone point me in the right direction to start? On Windows it's so simple, there is no additional thing to do other than going in display preferences and activating all 3+ monitors. They can even be laid out alternating one monitor from one graphics card with another monitor from the other card.

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• How do I pass an object location into a vertex shader?

  - by Greg Kassapidis

  I am using Blender Game Engine. I want to create a large flat plane, and deform it locally near a moving object. So far (despite being a beginner at shaders) I've written a vertex shader for the plane which moves the vertices to their correct positions (constant positions, for now). I cannot find a way to swap that constant location with an object's location updated every frame, while the shader is running. I am not even sure if it's possible. I only want to access a specific object's center from the shader.

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• Why do I have to log into hotmail twice?

  - by Tony Lee

  I just recently noticed I have to attempt a login into hotmail twice before it succeeds. Although I'm using Google Chrome (3.0.195.21), the symptoms are well described in a Mozilla thread. In short, I'm told: The e-mail address or password is incorrect. Please try again. The thread on mozilla's site that supposed to describe the latest details (and the 1st hit on google when I search for "hotmail login twice") requires an account to read so I'm hoping someone here has a good synopsis of what the cause is. I normally start at hotmail.com, which redirects to login.live.com/.... I can login by starting at mail.live.com, using IE8 or attempting a 2nd login. Oddly, if I start at login.live.com Chrome tells me there is a redirect loop. Does anyone know or have a public link to the root cause of the double login? (it is a hotmail account I'm login into) EDIT - Caused by my 'restricting how 3rd parties can use cookies'. If I allow all cookies, it works first time.

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