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• Tips and tricks to make NX server more stable

  - by gareth_bowles

  My shop has been using the FreeNX server on Fedora 11 for a while now and mostly getting good results, especially with performance, but we have some annoying problems with client connections. There are two main issues: Client sessions sometimes freeze after a long time (seems to be at least 2 hours of having the session active) We often have to make multiple attempts to start a new client session, especially if a previous session was suspended rather than terminated. In qwuite a few cases, we've had to restart the NX server to get around this. Our NX server configuration is the default except that we've enabled logging level 7 to /var/log/nxserver.log, and set the font server to "unix:/7100" so that it uses xfs. Does anyone have any ideas for making things more stable ?

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• Can I run into legal issues with random names?

  - by Nathan Sabruka

  I'm currently building a game whose NPC's are going to be assigned a random gender and a random name for the right gender. To do this I will be using a "database" of names (actually a text file with tuples). There would also be a list of last names, which will be added to the first name also randomly. My question is the following. Suppose one such random name is "George Bush", and this person has been randomly assigned the job of president. As you can see, this could easily be seen as having been "copied" from a real-life person. The main issue is this. Names will be randomly-generated, yes, but the seed for random-number generation will be constant. In other words, the name of an NPC would be randomly-generated, i.e. I wouldn't choose it, but it would be the same for every player. Could this get me in trouble? We cannot verify all possible names, since the generated number of NPC's could be potentially limitless (new NPC's are being created whenever needed).

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• Assign PowerShell script to run at startup using PowerShell on Window Server 2012

  - by James Toyer

  I'm trying to write a PowerShell script that will run when a Windows 2012 instance is created on AWS using the configuration tools provided by AWS. My problem is that I want to change the name of the machine once it has started up, restart the machine and carry on set up process after. The main reason for this is that one of the applications, Boundary, installed in the set up process takes the name of the server when first installed. It is then doesn't seem possible to change it's name in their portal. Ideally I would have two PowerShell scripts, one to start the set up process, initialised through AWS and another that runs the first time the machine restarts. This second script would ideally be queued to run on the next start by the initial set up script. So I guess my question are: Is this possible? How would I go about doing this. My Google foo is letting me down here so any answers would be appreciated.

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• "Recipient address rejected" when sending an email to an external address with sendgrid

  - by WJB

  In postfix, I'm using relay_host to send an email to an external address using sendgrid, but I get an error about local ricipient table when sending an email from my PHP code. This is my main.cf in /postfix/ ## -- Sendgrid smtp_sasl_auth_enable = yes smtp_sasl_password_maps = static:username:password smtp_sasl_security_options = noanonymous smtp_tls_security_level = may header_size_limit = 4096000 relayhost = [smtp.sendgrid.net]:587 This is the error message from the log: postfix/smtpd[53598]: [ID 197553 mail.info] NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 550 5.1.1 Recipient address rejected: User unknown in local recipient table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<localhost.localdomain> One interesting thing is when I use "sendmail [email protected]" from the command line, the email is delivered successfully using SendGrid. I think it's because this uses postfix/smtp instead of postfix/smtpD the log for this says, postfix/smtp[18670]: [ID 197553 mail.info] AAF7313A7E: to=, relay=smtp.sendgrid.net[50.97.69.148]:587, delay=4.1, delays=3.5/0.02/0.44/0.18, dsn=2.0.0, status=sent (250 Delivery in progress) Thank you

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• Cloning existing software for commercial purposes - legal implications

  - by user2036256

  I have been asked to clone some existing software for a company. Basically its an old 16 bit DOS console app, which was supplied free of charge in I believe the late 80's. Having replaced the machine that needs to run it with a box running Win7 x64 they can't get it to work. It crashes every couple of minutes under DOSbox. The company that supplied it appears to no longer exist - if they did the company asking me to do this would almost certainly know about it. Its undetermined whether they have gone entirely or are just trading under a different name. If the latter they seem to have withdrawn from the market related to this product (because again, niche area, we should know about everyone there). What is the status to this with regards to copyright etc.? The main concern for the company involved is they want an identical interface to what they already have so I would have to clone this entirely. Having no source code / indication of the underlying mechanisms these would be written from scratch. Is an interface covered by copyright? / Does that still hold 30 years later? What is the assumed license when none at all is provided? Under UK law would I be under any serious risk were I to take on the project? How would this pan out if I then decided to sell the software on to other companies? Thanks

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• nginx 1.2.3 installed but remains at 1.1.19

  - by Nyxynyxx

  I've installed nginx 1.2.3 by adding a new ppa sudo add-apt-repository ppa:nginx/stable sudo apt-get update sudo apt-get install nginx However, nginx -v still gives me 1.1.19. What happened? Output The following packages will be upgraded: nginx 1 upgraded, 0 newly installed, 0 to remove and 46 not upgraded. Need to get 61.8 kB of archives. After this operation, 3,072 B of additional disk space will be used. Get:1 http://ppa.launchpad.net/nginx/stable/ubuntu/ precise/main nginx all 1.2.3-0ubuntu0ppa3~precise [61.8 kB] Fetched 61.8 kB in 0s (89.7 kB/s) (Reading database ... 79914 files and directories currently installed.) Preparing to replace nginx 1.1.19-1 (using .../nginx_1.2.3-0ubuntu0ppa3~precise_all.deb) ... Unpacking replacement nginx ... Setting up nginx (1.2.3-0ubuntu0ppa3~precise) ... root@precise64:/var/www/apadment# nginx -v nginx version: nginx/1.1.19

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• Slow boot on Ubuntu 12.04, probable cause the network connection

  - by Ravi S Ghosh

  I have been having rather slow boot on Ubuntu 12.04. Lately, I tried to figure out the reason and it seems to be the network connection which does not get connected and requires multiple attempts. Here is part of dmesg [ 2.174349] EXT4-fs (sda2): INFO: recovery required on readonly filesystem [ 2.174352] EXT4-fs (sda2): write access will be enabled during recovery [ 2.308172] firewire_core: created device fw0: GUID 384fc00005198d58, S400 [ 2.333457] usb 7-1.2: new low-speed USB device number 3 using uhci_hcd [ 2.465896] EXT4-fs (sda2): recovery complete [ 2.466406] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) [ 2.589440] usb 7-1.3: new low-speed USB device number 4 using uhci_hcd **[ 18.292029] ADDRCONF(NETDEV_UP): eth0: link is not ready** [ 18.458958] udevd[377]: starting version 175 [ 18.639482] Adding 4200960k swap on /dev/sda5. Priority:-1 extents:1 across:4200960k [ 19.314127] wmi: Mapper loaded [ 19.426602] r592 0000:09:01.2: PCI INT B -> GSI 18 (level, low) -> IRQ 18 [ 19.426739] r592: driver successfully loaded [ 19.460105] input: Dell WMI hotkeys as /devices/virtual/input/input5 [ 19.493629] lp: driver loaded but no devices found [ 19.497012] cfg80211: Calling CRDA to update world regulatory domain [ 19.535523] ACPI Warning: _BQC returned an invalid level (20110623/video-480) [ 19.539457] acpi device:03: registered as cooling_device2 [ 19.539520] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/LNXVIDEO:00/input/input6 [ 19.539568] ACPI: Video Device [M86] (multi-head: yes rom: no post: no) [ 19.578060] Linux video capture interface: v2.00 [ 19.667708] dcdbas dcdbas: Dell Systems Management Base Driver (version 5.6.0-3.2) [ 19.763171] r852 0000:09:01.3: PCI INT B -> GSI 18 (level, low) -> IRQ 18 [ 19.763258] r852: driver loaded successfully [ 19.854769] input: Microsoft Comfort Curve Keyboard 2000 as /devices/pci0000:00/0000:00:1d.1/usb7/7-1/7-1.2/7-1.2:1.0/input/input7 [ 19.854864] generic-usb 0003:045E:00DD.0001: input,hidraw0: USB HID v1.11 Keyboard [Microsoft Comfort Curve Keyboard 2000] on usb-0000:00:1d.1-1.2/input0 [ 19.878605] input: Microsoft Comfort Curve Keyboard 2000 as /devices/pci0000:00/0000:00:1d.1/usb7/7-1/7-1.2/7-1.2:1.1/input/input8 [ 19.878698] generic-usb 0003:045E:00DD.0002: input,hidraw1: USB HID v1.11 Device [Microsoft Comfort Curve Keyboard 2000] on usb-0000:00:1d.1-1.2/input1 [ 19.902779] input: DELL DELL USB Laser Mouse as /devices/pci0000:00/0000:00:1d.1/usb7/7-1/7-1.3/7-1.3:1.0/input/input9 [ 19.925034] generic-usb 0003:046D:C063.0003: input,hidraw2: USB HID v1.10 Mouse [DELL DELL USB Laser Mouse] on usb-0000:00:1d.1-1.3/input0 [ 19.925057] usbcore: registered new interface driver usbhid [ 19.925059] usbhid: USB HID core driver [ 19.942362] uvcvideo: Found UVC 1.00 device Laptop_Integrated_Webcam_2M (0c45:63ea) [ 19.947004] input: Laptop_Integrated_Webcam_2M as /devices/pci0000:00/0000:00:1a.7/usb1/1-6/1-6:1.0/input/input10 [ 19.947075] usbcore: registered new interface driver uvcvideo [ 19.947077] USB Video Class driver (1.1.1) [ 20.145232] Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree: [ 20.145235] Copyright(c) 2003-2011 Intel Corporation [ 20.145327] iwlwifi 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 20.145357] iwlwifi 0000:04:00.0: setting latency timer to 64 [ 20.145402] iwlwifi 0000:04:00.0: pci_resource_len = 0x00002000 [ 20.145404] iwlwifi 0000:04:00.0: pci_resource_base = ffffc90000674000 [ 20.145407] iwlwifi 0000:04:00.0: HW Revision ID = 0x0 [ 20.145531] iwlwifi 0000:04:00.0: irq 46 for MSI/MSI-X [ 20.145613] iwlwifi 0000:04:00.0: Detected Intel(R) WiFi Link 5100 AGN, REV=0x54 [ 20.145720] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 20.167535] iwlwifi 0000:04:00.0: device EEPROM VER=0x11f, CALIB=0x4 [ 20.167538] iwlwifi 0000:04:00.0: Device SKU: 0Xf0 [ 20.167567] iwlwifi 0000:04:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels [ 20.172779] fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel. [ 20.172783] Disabling lock debugging due to kernel taint [ 20.250115] [fglrx] Maximum main memory to use for locked dma buffers: 3759 MBytes. [ 20.250567] [fglrx] vendor: 1002 device: 9553 count: 1 [ 20.251256] [fglrx] ioport: bar 1, base 0x2000, size: 0x100 [ 20.251271] pci 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 20.251277] pci 0000:01:00.0: setting latency timer to 64 [ 20.251559] [fglrx] Kernel PAT support is enabled [ 20.251578] [fglrx] module loaded - fglrx 8.96.4 [Mar 12 2012] with 1 minors [ 20.310385] iwlwifi 0000:04:00.0: loaded firmware version 8.83.5.1 build 33692 [ 20.310598] Registered led device: phy0-led [ 20.310628] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain [ 20.372306] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs' [ 20.411015] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd04733/0xa40000/0xa0000 [ 20.454232] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input11 [ 20.545636] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain [ 20.545640] cfg80211: World regulatory domain updated: [ 20.545642] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [ 20.545644] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 20.545647] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [ 20.545649] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [ 20.545652] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 20.545654] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 20.609484] type=1400 audit(1340502633.160:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient" pid=693 comm="apparmor_parser" [ 20.609494] type=1400 audit(1340502633.160:3): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=642 comm="apparmor_parser" [ 20.609843] type=1400 audit(1340502633.160:4): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=693 comm="apparmor_parser" [ 20.609852] type=1400 audit(1340502633.160:5): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=642 comm="apparmor_parser" [ 20.610047] type=1400 audit(1340502633.160:6): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=693 comm="apparmor_parser" [ 20.610060] type=1400 audit(1340502633.160:7): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=642 comm="apparmor_parser" [ 20.610476] type=1400 audit(1340502633.160:8): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=814 comm="apparmor_parser" [ 20.610829] type=1400 audit(1340502633.160:9): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=814 comm="apparmor_parser" [ 20.611035] type=1400 audit(1340502633.160:10): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=814 comm="apparmor_parser" [ 20.661912] snd_hda_intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 [ 20.661982] snd_hda_intel 0000:00:1b.0: irq 47 for MSI/MSI-X [ 20.662013] snd_hda_intel 0000:00:1b.0: setting latency timer to 64 [ 20.770289] input: HDA Intel Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12 [ 20.770689] snd_hda_intel 0000:01:00.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17 [ 20.770786] snd_hda_intel 0000:01:00.1: irq 48 for MSI/MSI-X [ 20.770815] snd_hda_intel 0000:01:00.1: setting latency timer to 64 [ 20.994040] HDMI status: Codec=0 Pin=3 Presence_Detect=0 ELD_Valid=0 [ 20.994189] input: HDA ATI HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input13 [ 21.554799] vesafb: mode is 1024x768x32, linelength=4096, pages=0 [ 21.554802] vesafb: scrolling: redraw [ 21.554804] vesafb: Truecolor: size=0:8:8:8, shift=0:16:8:0 [ 21.557342] vesafb: framebuffer at 0xd0000000, mapped to 0xffffc90011800000, using 3072k, total 3072k [ 21.557498] Console: switching to colour frame buffer device 128x48 [ 21.557516] fb0: VESA VGA frame buffer device [ 21.987338] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro [ 22.184693] EXT4-fs (sda6): mounted filesystem with ordered data mode. Opts: (null) [ 27.362440] iwlwifi 0000:04:00.0: RF_KILL bit toggled to disable radio. [ 27.436988] init: failsafe main process (986) killed by TERM signal [ 27.970112] ppdev: user-space parallel port driver [ 28.198917] Bluetooth: Core ver 2.16 [ 28.198935] NET: Registered protocol family 31 [ 28.198937] Bluetooth: HCI device and connection manager initialized [ 28.198940] Bluetooth: HCI socket layer initialized [ 28.198941] Bluetooth: L2CAP socket layer initialized [ 28.198947] Bluetooth: SCO socket layer initialized [ 28.226135] Bluetooth: RFCOMM TTY layer initialized [ 28.226141] Bluetooth: RFCOMM socket layer initialized [ 28.226143] Bluetooth: RFCOMM ver 1.11 [ 28.445620] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 28.445623] Bluetooth: BNEP filters: protocol multicast [ 28.524578] type=1400 audit(1340502641.076:11): apparmor="STATUS" operation="profile_load" name="/usr/lib/cups/backend/cups-pdf" pid=1052 comm="apparmor_parser" [ 28.525018] type=1400 audit(1340502641.076:12): apparmor="STATUS" operation="profile_load" name="/usr/sbin/cupsd" pid=1052 comm="apparmor_parser" [ 28.629957] type=1400 audit(1340502641.180:13): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=1105 comm="apparmor_parser" [ 28.630325] type=1400 audit(1340502641.180:14): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=1105 comm="apparmor_parser" [ 28.630535] type=1400 audit(1340502641.180:15): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=1105 comm="apparmor_parser" [ 28.645266] type=1400 audit(1340502641.196:16): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm/lightdm-guest-session-wrapper" pid=1104 comm="apparmor_parser" **[ 28.751922] ADDRCONF(NETDEV_UP): wlan0: link is not ready** [ 28.753653] tg3 0000:08:00.0: irq 49 for MSI/MSI-X **[ 28.856127] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 28.857034] ADDRCONF(NETDEV_UP): eth0: link is not ready** [ 28.871080] type=1400 audit(1340502641.420:17): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/mission-control-5" pid=1108 comm="apparmor_parser" [ 28.871519] type=1400 audit(1340502641.420:18): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/telepathy-*" pid=1108 comm="apparmor_parser" [ 28.874905] type=1400 audit(1340502641.424:19): apparmor="STATUS" operation="profile_replace" name="/usr/lib/cups/backend/cups-pdf" pid=1113 comm="apparmor_parser" [ 28.875354] type=1400 audit(1340502641.424:20): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/cupsd" pid=1113 comm="apparmor_parser" [ 30.477976] tg3 0000:08:00.0: eth0: Link is up at 100 Mbps, full duplex [ 30.477979] tg3 0000:08:00.0: eth0: Flow control is on for TX and on for RX **[ 30.478390] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready** [ 31.110269] fglrx_pci 0000:01:00.0: irq 50 for MSI/MSI-X [ 31.110859] [fglrx] Firegl kernel thread PID: 1327 [ 31.111021] [fglrx] Firegl kernel thread PID: 1329 [ 31.111408] [fglrx] Firegl kernel thread PID: 1330 [ 31.111543] [fglrx] IRQ 50 Enabled [ 31.712938] [fglrx] Gart USWC size:1224 M. [ 31.712941] [fglrx] Gart cacheable size:486 M. [ 31.712945] [fglrx] Reserved FB block: Shared offset:0, size:1000000 [ 31.712948] [fglrx] Reserved FB block: Unshared offset:fc2b000, size:3d5000 [ 31.712950] [fglrx] Reserved FB block: Unshared offset:1fffb000, size:5000 [ 41.312020] eth0: no IPv6 routers present As you can see I get multiple instances of [ 28.856127] ADDRCONF(NETDEV_UP): eth0: link is not ready and then finally it becomes read and I get the message [ 30.478390] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready. I searched askubuntun, ubuntuforum, and the web but couldn't find a solution. Any help would be very much appreciated. Here is the bootchart

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• How to get hp printer to select correct trays on samba shared printer

  - by dgermann

  My first post here. Clean install of 12.04.1. Previously 10.04. Have been running a p2035n printer without problem. Now, no matter what paper tray I select it prints to the top "by-pass" feeder--not the lower main tray. And when I select to print to manual feed, it does not wait for me to put in paper (like it used to), but prints immediately. The printer is on a samba share and is physically plugged into a WinXP machine. Its uri is smb:///computername/p2035n. I have tried several of the offered drivers for this hp machine, and even tried generic-laser. Same result on all. Here are some other things I have tried (losing 2-3 hours of my time!): hp-check -t reports “error: User needs to be member of group 'lp' to enable print, scan & fax. ” and “warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend to function in HPLIP.” needed to download HPLIP 3.12.11 followed http://hplipopensource.com/hplip-web/install/install/index.html sh hplip-3.12.11-run says that before setup logout and then on login run hp-setup hp-setup could not find the printer ran hp-check -t again, found I was not in group lp ran hp-check --fix and it fixed that problem, asks for reboot rebooted after running update manager (new kernel) and hp-check -t shows no errors this time all the tray selections end up on the bypass tray hp-setup still cannot find the printer So is there a way to make this work? Thanks! :- Doug.

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• DotNetNuke + PayPal

  - by Nuri Halperin

  A DotNetNuke i'm supporting has had a paypal "buy now" button and other variations with custom fields for a while now. About 2 weeks ago (somewhere in March 2010) they all stopped working. The problem manifested such that once you clicked the "buy now" button, Paypal site would throw a scary error page to the effect of: "Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, [email protected] and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log" Once I verified no cheeky content editor changed the page, I went digging for answers. The main source incompatibility of PayPal's simple HTML forms is that DNN includes a form on every page, and nested forms are not really supported. As blogged here and lamented here, the solution I came up with is simply to modify the form enctype to 'application/x-www-form-urlencoded' as illustrated below: 1: <input type="image" border="0" 2: src="https://www.paypal.com/en_US/i/btn/btn_buynowCC_LG.gif" 3: name="submit" 4: alt="PayPal - The safer, easier way to pay online!" 5: onClick="this.form.action='https://www.paypal.com/cgi-bin/webscr'; this.form.enctype='application/x-www-form-urlencoded';this.form.submit();" /> One would think that PayPal would want the masses submitting HTML in all manners of "enctype", but I guess every company has it's quirks. At least my favorite non-profit can now continue and accept payments. Sigh.

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• Pre game loading time vs. in game loading time

  - by Keeper

  I'm developing a game in which a random maze is included. There are some AI creatures, lurking the maze. And I want them to go in some path according to the mazes shape. Now there are two possibilities for me to implement that, the first way (which I used) is by calculating several wanted lurking paths once the maze is created. The second, is by calculating a path once needed to be calculated, when a creature starts lurking it. My main concern is loading times. If I calculate many paths at the creating of the maze, the pre loading time is a bit long, so I thought about calculating them when needed. At the moment the game is not 'heavy' so calculating paths in mid game is not noticeable, but I'm afraid it will once it will get more complicated. Any suggestions, comments, opinions, will be of help. Edit: As for now, let p be the number of pre-calculated paths, a creatures has the probability of 1/p to take a new path (which means a path calculation) instead of an existing one. A creature does not start its patrol until the path is fully calculated of course, so no need to worry about him getting killed in the process.

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• Should I have seperate business and personal websites?

  - by Thomas Clowes

  I have my business website - I am a web designer and developer, and also buy/sell websites/domain names. As such my website links to 'Our sites' = the websites which we design and run as well as a variety of tools such as a domain whois tool. These are obviously relevant to the business. As an individual, I like to travel and do white water kayaking as a hobby. I also have a degree in economics. I have thus created a blog on my business website where I write about domain names, web design, kayaking, travelling and economics. I've just begun researching SEO and am looking into optimizing my business website. I don't actually directly offer any services to clients at the moment, my main aim is to have a business website which supports my websites. If for example a potential advertise on one of my sites checks out the business website, I want them to think professional, down to earth, quirky. Given this is having my business/personal interests intertwined a problem? For SEO.. on my homepage for example when I'm writing a headline and a paragraph about what we do.. what do I put? and how do I optimize for SEO with keywords and the like? Further to the above, my company sponsors me and a group of accquantances as a kayaking team.. as such my personal interests do sort of overlap (just to add a complexity :))

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• WEB based HPC cluster node management

  - by Skuja

  Hello, i am working on my school diploma thesis. The main goal is to create web based application where logged users could see free and busy nodes, turn them on and off, see what process they are running etc. Figured out that i could do something like this - write some cron daemon that would run every 30seconds or so, and it could run ping utility for each node to find out if it is on or off, then write results to some file. Then from my web app (i will write in PHP) i could read the info. Will it be a good solution? How would you suggest me to do it? And finally, is there any existing solutions (it may not be a definetly ewb based) for managment of cluster nodes?

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• 2D SAT Collision Detection not working when using certain polygons

  - by sFuller

  My SAT algorithm falsely reports that collision is occurring when using certain polygons. I believe this happens when using a polygon that does not contain a right angle. Here is a simple diagram of what is going wrong: Here is the problematic code: std::vector<vec2> axesB = polygonB->GetAxes(); //loop over axes B for(int i = 0; i < axesB.size(); i++) { float minA,minB,maxA,maxB; polygonA->Project(axesB[i],&minA,&maxA); polygonB->Project(axesB[i],&minB,&maxB); float intervalDistance = polygonA->GetIntervalDistance(minA, maxA, minB, maxB); if(intervalDistance >= 0) return false; //Collision not occurring } This function retrieves axes from the polygon: std::vector<vec2> Polygon::GetAxes() { std::vector<vec2> axes; for(int i = 0; i < verts.size(); i++) { vec2 a = verts[i]; vec2 b = verts[(i+1)%verts.size()]; vec2 edge = b-a; axes.push_back(vec2(-edge.y,edge.x).GetNormailzed()); } return axes; } This function returns the normalized vector: vec2 vec2::GetNormailzed() { float mag = sqrt( x*x + y*y ); return *this/mag; } This function projects a polygon onto an axis: void Polygon::Project(vec2* axis, float* min, float* max) { float d = axis->DotProduct(&verts[0]); float _min = d; float _max = d; for(int i = 1; i < verts.size(); i++) { d = axis->DotProduct(&verts[i]); _min = std::min(_min,d); _max = std::max(_max,d); } *min = _min; *max = _max; } This function returns the dot product of the vector with another vector. float vec2::DotProduct(vec2* other) { return (x*other->x + y*other->y); } Could anyone give me a pointer in the right direction to what could be causing this bug?

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• Games at Work Part 2: Gamification and Enterprise Applications

  - by ultan o'broin

  Gamification and Enterprise Applications In part 1 of this article, we explored why people are motivated to play games so much. Now, let's think about what that means for Oracle applications user experience. (Even the coffee is gamified. Acknowledgement @noelruane. Check out the Guardian article Dublin's Frothing with Tech Fever. Game development is big business in Ireland too.) Applying game dynamics (gamification) effectively in the enterprise applications space to reflect business objectives is now a hot user experience topic. Consider, for example, how such dynamics could solve applications users’ problems such as: Becoming familiar or expert with an application or process Building loyalty, customer satisfaction, and branding relationships Collaborating effectively and populating content in the community Completing tasks or solving problems on time Encouraging teamwork to achieve goals Improving data accuracy and completeness of entry Locating and managing the correct resources or information Managing changes and exceptions Setting and reaching targets, quotas, or objectives Games’ Incentives, Motivation, and Behavior I asked Julian Orr, Senior Usability Engineer, in the Oracle Fusion Applications CRM User Experience (UX) team for his thoughts on what potential gamification might offer Oracle Fusion Applications. Julian pointed to the powerful incentives offered by games as the starting place: “The biggest potential for gamification in enterprise apps is as an intrinsic motivator. Mechanisms include fun, social interaction, teamwork, primal wiring, adrenaline, financial, closed-loop feedback, locus of control, flow state, and so on. But we need to know what works best for a given work situation.” For example, in CRM service applications, we might look at the motivations of typical service applications users (see figure 1) and then determine how we can 'gamify' these motivations with techniques to optimize the desired work behavior for the role (see figure 2). Description of Figure 1 Description of Figure 2 Involving Our Users Online game players are skilled collaborators as well as problem solvers. Erika Webb (@erikanollwebb), Oracle Fusion Applications UX Manager, has run gamification events for Oracle, including one on collaboration and gamification in Oracle online communities that involved Oracle customers and partners. Read more... However, let’s be clear: gamifying a user interface that’s poorly designed is merely putting the lipstick of gamification on the pig of work. Gamification cannot replace good design and killer content based on understanding how applications users really work and what motivates them. So, Let the Games Begin! Gamification has tremendous potential for the enterprise application user experience. The Oracle Fusion Applications UX team is innovating fast and hard in this area, researching with our users how gamification can make work more satisfying and enterprises more productive. If you’re interested in knowing more about our gamification research, sign up for more information or check out how your company can get involved through the Oracle Usability Advisory Board. Your thoughts? Find those comments.

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• GetContactList stops reporting collisions on welded bodies

  - by Henrique Jung

  I have some strange problem with my game which uses Box2D as physics engine and I'm out of ideas on what I can do to solve it. My game is a class assignment where I need to build a simple game where the main character moves in a 2D environment while square blocks comes from below him. Each time a collision occurs, that block is attached to the character using a weld joint, when three blocks of the same colors are together, they annihilate themselves(an effect similar to Bejeweled). I'm using a recursive function to iterate through all the attached blocks of a given block to see if there are enough blocks for them to be deleted. I'm using GetContactList function to iterate through the list of contacts to see which blocks are adjacent to each other. The results are quite disappointing, the blocks only get annihilated in few cases. After a lot of debugging, I found the issue, but I still don't know how to solve. My issue is: after some time, GetContactList STOPS returning contacts (return NULL) to blocks that were already attached for some time. I spent some time reading the Box2D manual as well as some tutorials and still didn't find any clue of what is happening. Below there's some simplified version of the code that I wrote. for(int a = 0; a < blocksList.size(); a++) { blocksList[a].BuildConnections(); } And on BuildConnections b2ContactEdge* edge = body->GetContactList(); while(edge != NULL) { if (long_check_to_see_if_there's_a_block_nearby) { // add itself to the list to be anihilated globalList.push_back(this); //if there's, call BuildConnections again on the adjacent block adjacentBody->GetUserData()->BuildConnections; } edge = edge->next; } I know that there's another issue related to circular inclusions, but I fairly sure that this problem isn't causing the problem with the collisions. You can download my entire code from this page if you'd like http://code.google.com/p/fellz/source/list

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• Did something just get borked with glibc/perl/irssi?

  - by Wayne Werner

  I was using irssi about 30 minutes ago now on Ubuntu server 12.04. Everything was perfectly fine and then all of the sudden something happened (my guess is a power failure). The box was restarted. When I logged back in and ran irssi, I got the following: *** glibc detected *** irssi: double free or corruption (out): 0x0000000002085a40 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x7e626)[0x7ffc01d87626] irssi(config_node_set_str+0x98)[0x491768] irssi[0x491f12] irssi[0x491e61] irssi(config_parse+0x52)[0x492112] irssi[0x48ab81] irssi(settings_init+0xd1)[0x48bf81] irssi(core_init+0x79)[0x47a849] irssi(main+0xd8)[0x4167e8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7ffc01d2a76d] irssi[0x416b41] ======= Memory map: ======== 00400000-004d0000 r-xp 00000000 08:01 1319015 /usr/bin/irssi 006cf000-006d0000 r--p 000cf000 08:01 1319015 /usr/bin/irssi 006d0000-006dc000 rw-p 000d0000 08:01 1319015 /usr/bin/irssi 006dc000-006dd000 rw-p 00000000 00:00 0 02078000-02099000 rw-p 00000000 00:00 0 [heap] 7ffc0025b000-7ffc00270000 r-xp 00000000 08:01 655404 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffc00270000-7ffc0046f000 ---p 00015000 08:01 655404 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffc0046f000-7ffc00470000 r--p 00014000 08:01 655404 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffc00470000-7ffc00471000 rw-p 00015000 08:01 655404 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffc00471000-7ffc0073a000 r--p 00000000 08:01 1320172 /usr/lib/locale/locale-archive 7ffc0073a000-7ffc00746000 r-xp 00000000 08:01 655391 /lib/x86_64-linux-gnu/libnss_files-2.15.so 7ffc00746000-7ffc00945000 ---p 0000c000 08:01 655391 /lib/x86_64-linux-gnu/libnss_files-2.15.so 7ffc00945000-7ffc00946000 r--p 0000b000 08:01 655391 /lib/x86_64-linux-gnu/libnss_files-2.15.so 7ffc00946000-7ffc00947000 rw-p 0000c000 08:01 655391 /lib/x86_64-linux-gnu/libnss_files-2.15.so 7ffc00947000-7ffc00951000 r-xp 00000000 08:01 655392 /lib/x86_64-linux-gnu/libnss_nis-2.15.so 7ffc00951000-7ffc00b51000 ---p 0000a000 08:01 655392 /lib/x86_64-linux-gnu/libnss_nis-2.15.so Followed by many more lines. Is there anything I can do to fix this?

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• Creating user UI using Flixel

  - by Jamie Read

  I am new to game development but familiar with programming languages. I have started using Flixel and have a working Breakout game with score and lives. What I am trying to do is add a Start Screen before actually loading the game. I have a create function that adds all the game elements to the stage: override public function create():void // all game elements { How can I add this pre-load Start Screen? I'm not sure if I have to add in the code to this create function or somewhere else and what code to actually add. Eventually I would also like to add saving, loading, options and upgrades too. So any advice with that would be great. Here is my main game.as: package { import org.flixel.*; public class Game extends FlxGame { private const resolution:FlxPoint = new FlxPoint(640, 480); private const zoom:uint = 2; private const fps:uint = 60; public function Game() { super(resolution.x / zoom, resolution.y / zoom, PlayState, zoom); FlxG.flashFramerate = fps; } } } Thanks.

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• Disabling at application level a nic (network interface) on Windows

  - by Leandro

  How can I disable at application level a network interface? The main question is this: If I disable the nic trough wmic (win7) or devcon (XP), the "plug and play" of a wired nic doesn't work any more. For example, if the user put the cable on a disabled nic, the OS doesn't know about it. So I need to persist the enable condition but disabling the networking like a disable nic. There's some API, network configuration (routing, changing ip, changing gateway, any), .NET Framework resource (Only NetFramework 2.0) or do you can think in any workaround to do this? Suggest and ideas also will be treated as a solution. Thanks and kind regards.

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• Terminal app on Mac OS X - normal keys

  - by Matthew

  There are some default terminal things different for the Mac (for example, Command C to copy and Command V to paste rather than simply highlighting/right clicking). These are fine with me. What bothers me though is I can't figure out how to click or use the F keys. The main app I have problems with is htop. Htop supports clicking on column names to sort, etc. Also, to exit the app, you are supposed to press F10. But F10 simply mutes my volume. I've tried different combinations of things like alt F10. I usually have to quit htop by pressing CTRL-C Any ideas on how to get normal terminal behaviors? Normal meaning linux

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• PostgresQL on Amazon EBS volume, realistic performance, or move to something more lightweight?

  - by Peck

  Hi, I'm working on a little research project, currently running as an instance on ec2, and I'm hoping to figure out whether I'm going down the right path. We, like a thousand other people, are making use of some of twitters streaming feeds to do gather some data to have fun with and my db seems to be having problems keeping up, and queries take what seems to be a very long time. I'm not a DBA by trade, so I'll just dump some info here and add more if need be. System specs: ec2 xl, 15 gigs of ram ebs: 4 100 gb drives, raid 0. The stream we're getting we're looking at around 10k inserts per minute. 3 main tables, with the users we're tracking somewhere in the neighborhood of 26M rows currently. Is this amount of inserts on this hardware too much to ask out of ebs? Should take a look at some things with less overhead like mongodb?

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• Light mask map and camera for static lights in XNA Platformer

  - by JiminyCricket

  Using the example for some basic light maps found here : http://blog.josack.com/2011/07/xna-2d-dynamic-lighting.html, I've managed to create a lightmap texture using individual lightmaps and display it over a 2D tiled world as in the Platformer example. I'm using the very basic 2D camera example as found here : http://www.david-amador.com/2009/10/xna-camera-2d-with-zoom-and-rotation/, and the problem is that the lightmap texture scrolls with the player sprite. This looks pretty good and would be excellent for lighting the player sprite as it moves. But, I also want to be able to place static lights (or some initial position for the lights) that do not move with the player or camera. When I turn off the camera or give it a static position, it works as a series of static lights so I believe it's probably caused by the camera transformation matrix following the player around. I'm using RenderTarget2Ds, one for the main game screen after all the backgrounds and tiles are rendered, and one for the "lightmap" which consists of a black background and a bunch of lighting textures which are merged with it using additive blending. For now, I'm doing all of this in PlatformerGame.cs where the camera transformation and position is set and the level.Draw() call is made. I can't figure out how to separate the drawing of the lightmap and the camera following the player. I was thinking it would be better to render the shadows and lighting directly in the drawing of the level itself, but I'm not sure how to do that either because this technique requires RenderTarget2Ds and calling SpriteBatch.Begin()/End().

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• Similar domains using my business' content, and stealing SEO results

  - by Murciano

  I've been hired to create a website for a restaurant in my city, let's call it "Flying Dragon" Chinese restaurant. The restaurant has never had a website, though the business itself is about ten years old. However, if you Google the restaurant's name, the first site that comes up seems to be affiliated with the restaurant itself, even though it is not. This site - let's say, flyingdragonchinese.com - is also the one that Google has apparently selected, in its results, to be the official website of the restaurant - in essence, the first Google result is flyingdragonchinese.com, and directly beneath it, within the same entry, are the Google reviews and contact information. Upon visiting flyingdragonchinese.com (again, not the actual name), I see that the website has taken the menu content from the restaurant, in the same manner that Yelp does, but it also seems (to the untrained eye) to be the restaurant's official site. Basically, someone has created a fake website for the business (I am not sure why) using its actual menu and contact information, and is hogging the search results. The concept is similar to a "scraping site" except that the information seems to have been stolen manually. The main problem is that visitors to this site will have an inaccurate impression of the restaurant. I feel like the obvious solution is to register a new domain for my site, and simply beat out this competitor (or whatever it is) with smarter SEO and business verification with Google. However, the Conan-the-Barbarian-web-designer part of me wants to somehow bash this other site (deservedly?) into oblivion. But I don't know what I can really do, besides maybe issuing a cease-and-desist letter, or trying to contact the web host for the site, although there is no contact information available on this "fake" site for the site owner. Has anyone ever experienced something like this? Is there any solution?

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• ubuntu box just redisplaying login screen after update

  - by David M. Karr

  My Ubuntu 12.04 box has been working fine. A recent update may have messed something up. I normally run remote windows on it, and I noticed that my windows were failing to start up. I then tried logging into it directly from the GUI console, and I'm seeing that after I press enter on the (valid) password, the page just redisplays. It's not a password error, as that would give me an inline error. I see some messages appear and disappear quickly between the login screen going away and then redisplaying, but they go away too quickly to read. I was able to run the non-gui login, and I did an update and upgrade, and then rebooted, but it's doing the same thing. I have a Samba connection from my Windows box, and that's still working. If it matters, here's my uname output (somewhat elided): Linux ... 3.2.0-26-generic #41-Ubuntu SMP Thu Jun 14 17:49:24 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux What can I do to troubleshoot this? Note that when I select "Guest Session", it lets me log in and displays the window manager. This seems significant to me. Does this mean that something specific to my login is causing it to fail? Note: If it matters, here's the output from /var/log/dmesg. The line about gdm seems interesting: [ 9.815883] Bluetooth: RFCOMM TTY layer initialized [ 9.815887] Bluetooth: RFCOMM socket layer initialized [ 9.815888] Bluetooth: RFCOMM ver 1.11 [ 9.879088] [PCSPP,TRISTATE] [ 9.879092] parport0: irq 7 detected [ 9.883935] type=1400 audit(1341871177.871:10): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm/lightdm-guest-session-wrapper" pid=845 comm="apparmor_parser" [ 9.884365] type=1400 audit(1341871177.871:11): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/ntpd" pid=851 comm="apparmor_parser" [ 9.950397] e1000e 0000:00:19.0: irq 42 for MSI/MSI-X [ 9.961160] init: gdm main process (907) killed by TERM signal [ 9.966358] lp0: using parport0 (polling).

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• Applying Quotas Across all My Sites

  - by Bil Simser

  Just a quick snippet this morning. If you need to apply a new quota template to all users My Sites here's a quick script to do it. Changing an existing quota is fine but if you're migrating users from another system or you just want to up everyone's storage a bit here's what you do. Create a new quota template. This is found in Central Admin under Application Management | Site Collections | Specify quota templates. There's already a default "Individual Quota" created you might want to create your own or have a special one for your users Open up the PowerShell Management Console and enter "Get-SPWebApplication". This will list all your web applications on the farm.  To apply it to all My Sites (each site is a site collection of its own) run this script below. .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } 1: $webapps = Get-SPWebApplication; 2:   3: $webapp = $webapps[4]; 4:   5: foreach ($site in $webapp.Sites) { 6: Set-SPSite -Identity $site.url -QuotaTemplate "Your Quota Template" 7: } The first line gets all the web applications on the server. In our case, the forth one is the mysite web app (yours will probably be a different number). Just run Get-SPWebApplication from the console to figure out which one to use. You could get fancy and pipe the name to find it but I'm too lazy for that.Then we loop through all the sites on the list using the $site.url property and pass it to the Set-SPSite cmdlet and specify the name of the our custom QuotaTemplate.Easy. Now all users are updated with the new quota template.

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• Solutions for Project management [closed]

  - by user14416

  The team consists of 3 people. The method of development is Scrum. The language of the project is C++. The project will be under the control of the git system. The start up budget is 0. The following things have to be chosen: Build and Version Numbering Project documentation ( file with the most common info for current stage of the project, which will be changed every time the new version or subversion of the project emerges ) Project management tool ( like Trac or Redmine, I cannot use them, because there is no hosting ) Code documentation ( I consider Doxygen ) The following questions have arisen: What can you add to the above list of the main solutions for project management in the described project? One of three project participants has linux os (No MS Office), one has Windows and MS Office (does not want to use Libre or Open Office), one has Windows, but does not have MS Office. What formats, tools can u suggest using for project documentation? The variant of using online wiki does not fit, it must be files. OneNote mb is a good tool for project management, but because of the reason mentioned above it is not possible. What can you advise? Offer a system for Build and Version Numbering.

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