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• Fedora14 serial console how-to needed

  - by lamba2

  Has anyone ever got a serial console working in fedora 14 ? Is it as simple as adding to grub: serial --unit=0 --speed=38400 terminal --timeout=10 serial console and add to the kernel lines: console=tty0 console=ttyS0,38400 ??? If so, this isn't working for me. I have agetty installed, and im using minicom, although i've heard you can also use "screen /dev/ttyUSB0" on the client side. The /etc/init/serial.conf file suggests it should be working, but nothing. Currently getting no joy from any of this after 2 days. Does anyone know a method that definitely works on fedora 14 ? (no /etc/event.d/ needed or such) edit: Client side im using a null modem cable and usb-serial adaptor.

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• python: os.system does not execute shell comand

  - by capoluca

  I need to execute shell command in python program (I have ubuntu). More specifically I want to create graph using graphviz in python script. My code is os.system("dot -Tpng graph.dot -o graph.png") It does not work, but if I just type dot -Tpng graph.dot -o graph.png in command line then everything is fine. Do you know what the problem? Thank you! Edit: Does not work means that nothing happens, there are no errors. Output from dot -v -Tpng graph.dot -o graph.png: dot - graphviz version 2.26.3 (20100126.1600) Activated plugin library: libgvplugin_pango.so.6 Using textlayout: textlayout:cairo Activated plugin library: libgvplugin_dot_layout.so.6 Using layout: dot:dot_layout Using render: cairo:cairo Using device: png:cairo:cairo The plugin configuration file: /usr/lib/graphviz/config6 was successfully loaded. render : cairo dot fig gd map ps svg tk vml vrml xdot layout : circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi textlayout : textlayout device : canon cmap cmapx cmapx_np dot eps fig gd gd2 gif gv imap imap_np ismap jpe jpeg jpg pdf plain plain-ext png ps ps2 svg svgz tk vml vmlz vrml wbmp x11 xdot xlib loadimage : (lib) eps gd gd2 gif jpe jpeg jpg png ps svg

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• Ruby or Python?

  - by Bobby Tables

  Hi all, This question is extremely subjective and open-ended. It might even sound like something I should just research for myself and make my own decision. But I'd like to put it out there and get some thoughts from others. Long story short - I burned out with the rat race and am on a self-funded sabbatical this year. Much of it is to take a break from the corporate grind and travel around, but I also want to play around with new technologies and do some self-learning projects, to stay up to speed on programming, and well - I just love tinkering with programming, when there's no pressure! Here's the thing: I am a lifetime C/C++/Java programmer. I'm a bit of a squiggly bracket snob since I've been working with this family of languages for my entire programming career. So I'd like to learn a language which isn't so closely syntactically related to this group. What I'm basically looking for is a language which is relatively general purpose, fun to learn, has some new concepts that are different from C++/Java, and has a good community. A secondary consideration is that it has good web development frameworks. A tertiary consideration is that it's not totally academic (read: there are real world jobs out there using it). I've narrowed it down to Ruby or Python. My impression of Ruby is that it is extremely web oriented - that the only real application of it is as a server side scripting language for doing web stuff (mainly Ruby on Rails). For Python I'm not so sure. TL;DR and to put it as succinctly as possible: which of these would be better for a C++/Java guy to learn to get some new perspectives on programming? And which is more open and general purpose and applicable to a wider set of applications? I'm leaning towards Ruby at the moment, but I worry to an extent that it looks like it's used as nothing but a server side web language.

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• KB2494088 Always Fails : How to get it to install (or stop trying to)?

  - by Peter K.

  I have a problem where KB2494088 (a SQL Server 2008 R2 patch) continually fails to install when I reboot my system. Downloading the manual patch and trying to apply it says: The SQL Server patch package is part of a general distribution release (GDR). This package cannot be applied since this SQL Server feature has already been patched. To continue, you must install a higher version of the SQL Server patch. Most other posts (this, this) suggest it's either a failed (or cancelled) past installation or requires a SQL server repair. I've looked at registry settings and tried the repair option, but nothing seems to work.

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• Functional Methods on Collections

  - by GlenPeterson

  I'm learning Scala and am a little bewildered by all the methods (higher-order functions) available on the collections. Which ones produce more results than the original collection, which ones produce less, and which are most appropriate for a given problem? Though I'm studying Scala, I think this would pertain to most modern functional languages (Clojure, Haskell) and also to Java 8 which introduces these methods on Java collections. Specifically, right now I'm wondering about map with filter vs. fold/reduce. I was delighted that using foldRight() can yield the same result as a map(...).filter(...) with only one traversal of the underlying collection. But a friend pointed out that foldRight() may force sequential processing while map() is friendlier to being processed by multiple processors in parallel. Maybe this is why mapReduce() is so popular? More generally, I'm still sometimes surprised when I chain several of these methods together to get back a List(List()) or to pass a List(List()) and get back just a List(). For instance, when would I use: collection.map(a => a.map(b => ...)) vs. collection.map(a => ...).map(b => ...) The for/yield command does nothing to help this confusion. Am I asking about the difference between a "fold" and "unfold" operation? Am I trying to jam too many questions into one? I think there may be an underlying concept that, if I understood it, might answer all these questions, or at least tie the answers together.

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• Graphics performance of 945GME

  - by l0b0

  Edit: Since setting Appearance - Visual Effects up to a stunning "Normal", I now get ~35 FPS in glxgears right after login, with nothing else running :( I'm getting terrible graphics performance in NeverWinter Nights (native with SoU+HotU+CEP2) on my Eee PC 1005HAB. Even with all graphics settings (including the "advanced" ones) at minimum I get about 2-10 FPS, depending on the scene. Firefox is really sluggish as well - Changing tabs often takes a second, scrolling is laggy, and typing this I notice the delay between pressing keys and seeing the text on screen. The rest of the OS is running OK, although general performance seems to be even worse than my old Eee PC 900. glxgears gives about 60 FPS, which is apparently as it should be (synchronized with the monitor refresh rate). Bugs like Launchpad #252094 and the instructions for Reverting the Jaunty Xorg intel driver to 2.4 are old enough that I'm afraid following the instructions would render the system unusable. Are there any tips for improving graphics performance on this system that are still relevant for 10.10? $ uname -a Linux l0b0eee 2.6.35-28-generic #49-Ubuntu SMP Tue Mar 1 14:40:58 UTC 2011 i686 GNU/Linux $ lspci -nn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03) $ glxinfo name of display: :0.0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: SGI server glx version string: 1.4 ...

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• Screen gets stuck in a dim setting after waking up

  - by Mason Wheeler

  I've got a laptop that I recently upgraded from Vista to Windows 7. It works a lot better now for a lot of things, but there's one problem I've had happen a few times that never happened under Vista. When I put the system to sleep, then occasionally when I wake it up again, for no apparent reason, the screen's dim. Sometimes it's as if half the backlighting was turned off, and sometimes it's as if all the backlighting was turned off, all except for the mouse pointer, which remains as bright white as ever. Trying to change the screen's brightness does nothing, but rebooting fixes this. Has anyone else seen this? Any ideas on what's causing it or how to make it stop happening?

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• Building a DVR system for use with custom windows application (video analytics)

  - by Michael

  Is there a good PCIe DVR capture card that has at least 4 channels as well as the hardware encoding? It would have to have decent driver support in Windows xp or windows 7. I have looked at various video capture cards as well as an integrated video capture card/motherboard from Huperlabs. But so far I have not found one with a decent review and that has good driver support that I can verify. A really small card would be nice because I am trying to get a fairly small form factor. Huperlabs stuff is pretty awesome but they are slow to get back to me and they bundle their analytics software with the hardware (extra cost for nothing) The dvr is being used for security.

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• over Windows terminal change cursor width or color in Vim depending on mode

  - by INTPnerd

  I am using PuTTY to connect over SSH to an Ubuntu server from my Windows 7 workstation. Once connected I am using the Vim installation from the Ubuntu server to edit files. I want the cursor to change when I go into and out of insert mode. Part of my .vimrc file is like this but it is not changing the cursor: if &term =~ "xterm" echo "xTerm!!inate!" let &t_SI = "\<Esc>]12;purple\x7" let &t_EI = "\<Esc>]12;blue\x7" endif I know that the if statement is executing because of the echo. EDIT: Actually I would prefer to change the cursor to be a vertical line like you can in the PuTTY settings rather than change the color, or maybe even do both. But just changing the color would be a lot better than nothing. Also I am willing to change terminals if there is another Windows 7 Professionsal 64 bit compatible terminal that can do this (preferably something free). Maybe Poderosa can do this?

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• Site Isn't Enabled When Apache Restarted and No Error Message

  - by curiouscat

  I have added a new sites-available file but the site isn't enabled when apache is restarted. All the existing sites continue to work fine. There is no error message in /var/log/apache2/error.log There is the message, in the error log showing that I shut down the server and restarted: caught SIGTERM, shutting down There is nothing fancy about the site. The only special thing is the name is: domain_name.tv I can't imagine why that would matter, but at this point I can't imagine why the site isn't enabled or at least an error message given. Server running Ubuntu 12.04.

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• Plymouth package broken... Can I safely remove it? Other solution to repare it?

  - by Julien Gorenflot

  I have a broken package... So far nothing horrible. The problem is that it is Plymouth, and it seems that if I remove it, I will remove half of the packages of my system... So here is my question: if I actually remove, or even purge plymouth; will I at least have a terminal left after it to reinstall it? Or am I definitely doomed? Just to illustrate what I say; here is the result of an apt-get --reinstall install plymouth: julien@julien-desktop:~$ sudo apt-get --reinstall install plymouth Reading package lists... Done Building dependency tree Reading state information... Done Reinstallation of plymouth is not possible, it cannot be downloaded. You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: plymouth : Depends: libdrm-nouveau1 (>= 2.4.11-1ubuntu1~) but it is not installable Recommends: plymouth-themes-all but it is not installable E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). or an apt-get -f install (well basically it is the same) julien@julien-desktop:~$ sudo apt-get -f install [sudo] password for julien: Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... failed. The following packages have unmet dependencies: plymouth : Depends: libdrm-nouveau1 (>= 2.4.11-1ubuntu1~) but it is not installable Recommends: plymouth-themes-all but it is not installable E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. E: Unable to correct dependencies julien@julien-desktop:~$ Any idea would be very welcome...

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• Remove apache from ubuntu

  - by Keyo

  I want to remove apache as if it was never installed, no config files left behind. I intend to reinstall apache2 fresh. I have tried various combinations of apt-get options to no success. apt-get remove apache2 apt-get remove --purge apache2 apt-get purge apache2 apt-get autoremove apache2 None of these totally remove apache properly. Nothing works, the /etc/apache2 directory still exists. So I deleted it. When I install apache the folder is never created. Running Ubuntu server 10.10.

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• Starting/Stopping IBM WebSphere Application Server (WAS) 7 from the Command Line

  - by Christopher Parker

  I've written a script to automate the process of starting, stopping, and restarting WAS7 from the command line. Nothing starts automatically on one of our staging servers, so I have to start everything: deployment manager, node agent, app server, and Web server. The script I wrote seems to work pretty well. A coworker of mine recommended that I structure my commands differently. I'm wondering if there's a good, valid reason for doing so. First, my variables: WAS_HOME="/opt/IBM/WebSphere/AppServer" WAS_PROFILE_NAME="AppSrv01" WAS_APP_SERVER="server1" WAS_WEB_SERVER="webserver1" How I had the start commands: "${WAS_HOME}/bin/startManager.sh" "${WAS_HOME}/bin/startNode.sh" -profileName $WAS_PROFILE_NAME "${WAS_HOME}/bin/startServer.sh" -profileName $WAS_PROFILE_NAME $WAS_APP_SERVER "${WAS_HOME}/bin/startServer.sh" -profileName $WAS_PROFILE_NAME $WAS_WEB_SERVER I was told that I should do it like this, instead: WAS_DMGR="Dmgr01" # Added variable "${WAS_HOME}/profiles/${WAS_PROFILE_NAME}/bin/startNode.sh" "${WAS_HOME}/profiles/${WAS_DMGR}/bin/startManager.sh" "${WAS_HOME}/profiles/${WAS_PROFILE_NAME}/bin/startServer.sh" $WAS_APP_SERVER "${WAS_HOME}/profiles/${WAS_PROFILE_NAME}/bin/startServer.sh" $WAS_WEB_SERVER How is the second way of starting up everything for WebSphere any better or more correct than the first, original, way?

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• Embedded .swf file in .pfd-Ubuntu 10.04

  - by Thanos

  I have just finished a presentation in LaTeX. In this very .pdf file I have included a .swf animation(done with adobe flash CS5 in windows) which starts when you click on it. While I have already installed a relevant player(swfdec flash player) neither document viewer nor okular are able to reproduce it. I tried with my player to make sure that the file is not corrupted and the result was that it can be produced. I tried the same .pdf file in windows using adobe reader and there is no problem there. The embedded file can be reproduced with no problem. So I thought of installing adobe in ubuntu. I tried there to see if the problem was solved. Things got a bit better. Adobe could understand that there is something there, so when clicked I got a message that I had to get the proper player. When I clicked on a relevant button I expected to open my browser in a player's page. Instead nothing happened. If I place my mouse's cursor next to the space that defines my animation the is a "message" stating "Media File(application/x-shockwave flash)". The next step was to install Adobe Flash player, but I couldn't find the standallone player;only the browser's plugs... How can I get this .swf file play in pdf?

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• What metric captures why my OSX machine is so slow during XCode indexing

  - by Ben Flynn

  My entire machine OSX Lion machine slows down while XCode 4.4 is indexing. The CPU is less than 10% busy, I've got over 500 MB free memory, plenty of disk space, disk IO rate is not high, network activity is not high. Indexing just a few files can take minutes and builds are extremely slow. While this is going on, even loading a new web page in Chrome can be slow. Knowing how to fix it would be great, but more fundamentally how can I measure what is actually going slowly? What metrics should I be looking at? Nothing in Activity Monitor, iostat, top, or sar betray anything about what's going on to me. Even getting a man page is interminable.

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• Touchpad hardware button disables keyboard too

  - by jjg

  I have an old but nice Samsung X50 running MM which has a key between the touchpad buttons which disables the touchpad. Very nice, no-one like to brush against the touchpad while typing. It seems to be a hardware feature -- a BIOS style window appears at the top left of the screen when you press it saying "touchpad off"; and when you press it again it says "touchpad on", and so it is, but now the keyboard has no effect in X, I can type nothing except to meta-ctl F1 to the console. After a reboot the problem persists; and the only way I have found to fix it is to blow away .gconf are replace it with a copy I made in happier times. Deleting/modifying .gconf/desktop/gnome/peripherals/touchpad/%gconf.xml does not fix the problem. There is no way to turn off the switch in BIOS without losing the touchpad. I would prise the thing out with a screwdriver if I could, but it's a work machine. This button is the bane of my life, hanging over me like a sword of Damocles.

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• Debugging/Logging Techniques for End Users

  - by James Burgess

  I searched a bit, but didn't find anything particularly pertinent to my problem - so please do excuse me if I missed something! A few months back I inherited the source to a fairly-popular indie game project and have been working, along with another developer, on the code-base. We recently made our first release since taking over the development but we're a little stuck. A few users are experiencing slowdowns/lagging in the current version, as compared to the previous version, and we are not able to reproduce these issues in any of our various development environments (debug, release, different OSes, different machines, etc.). What I'd like to know is how can we go about implementing some form of logging/debugging mechanism into the game, that users can enable and send the reports to us for examination? We're not able to distribute debug binaries using the MSVS 2010 runtimes, due to the licensing - and wouldn't want to, for a variety of reasons. We'd really like to get to the bottom of this issue, even if just to find out it's nothing to do with our code base but everything to do with their system configuration. At the moment, we just have no leads - and the community isn't a very technically-savvy one, so we're unable to rely on 'expert' bug reports or investigations. I've seen the debug logging mechanism used in other applications and games for everything from logging simple errors to crash dumps. We're really at a loss at this stage as to how to address these issues, having been over every commit to the repository from the previous to the current version and not finding any real issues.

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• Why should krfb use so much cpu when I never use it?

  - by Newton Falls

  I was playing around with KSysGuard and I noticed the process using the most cpu was krfb, which is the server process for desktop sharing. I never use desktop sharing so I suppose it is a default loaded process. Why would this process use so much juice (around 15%) when I never use it and it really shouldn't be doing much of anything? I don't see any network activity so I don't think I am being hacked. I have suspended the process and nothing bad seems to have happened. Can I assume this is a safe thing to do?

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• How to redirect the output of the vmrun listProcessesInGuest command on windows?

  - by mark

  I run vmrun.exe with listProcessesInGuest on the command line and get the list of processes displayed in the console window. The exact command line is: "C:\VIX\vmrun.exe" -T vc -h "https://myserver/sdk" -u "mydomain\myuser" -p 123 -gu Administrator -gp 123 listProcessesInGuest "[Storage1] QA-W-7-SP1-64-0/QA-W-7-SP1-64-0.vmx" It works fine. Now I wish to redirect the output, however, neither 2> nor 1> work! The former has no effect - the output is still displayed in the console window, so I conclude it is send to stdout. But the latter does not work too - now nothing is displayed in the console window, but the redirection file is empty! It is created all right, but it has the zero size! Can someone explain what is going on?

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• Computer wont POST after power outage

  - by aaron

  I had just turned my computer on and windows was loading when the power in my neighborhood went out. Normally, when I turn my computer on, the video card fan spins up, then slows down, POST and windows boots. Now, after the blackout, the video card fan spins fast and wont stop. Nothing is displayed on the monitor. The monitor does not detect that the video card is sending it signals, it just stays on standby. No POST or beep codes. This is what I have tried so far: My motherboard has 2 PCI express slots and I tried plugging the video card into both of them but that didn't fix anything. I have replaced the power supply, that didn't fix anything. I cleared the CMOS, that didn't fix anything. Does anyone have any idea of what could be wrong? Thanks!

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• How to troubleshoot down terminal service/CITRIX sessions, when the process just won't terminate?

  - by Chad

  Running a CITRIX presentation server farm, version 4.5.6 on Windows 2003 sp2. In the CITRIX Access Management Console, I sometimes get a session that shows it's in a down state - but has none of the normal info associated with it (user name, applications, client name, idle time, etc...). It does say which servers it's on, so I check out that server's terminal services manager. I can see the down session but cannot reset it. I get: (Error 7024 - the requested operation cannot be completed because the terminal connection is currently busy processing a connect, disconnect, reset, or delete operation.) So I go to the task manager and look up the processes running under that session id. I see it's one of my published apps, but when I try to end the process - it simply does nothing and the process remains. Any way to get rid of these sessions without a server reboot?

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• Proper way for changing MAC address in a linux VM?

  - by HappyDeveloper

  I tried to change the MAC address in a ubuntu VM (virtualbox), but after that it threw lots of errors during boot, and then I had no internet connection. Then I saw that the interface was renamed to eth1, so I edited /etc/network/interfaces to change eth0 to eth1, rebooted (didn't know how to restart the network), and boot was now faster and internet worked fine. But now after every time I log in, I get 1 or 2 error messages that say nothing, they only ask me if I want to report them. So I was wondering, is there was a proper way to change MAC address, to avoid these issues?

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• Windows 2008 R2 Server Core Disk Space Requirements/Recomendations

  - by Richard West

  I'm in the preparation stage to roll out a few Windows 2008 R2 Server Core in my VMware ESX environment. In looking over the documentation it looks like Server Core can operate in a little as 6.5 GB of hard drive space. Less disk space required. A Server Core installation requires only about 3.5 gigabytes (GB) of disk space to install and approximately 3 GB for operations after the installation. I am curious as to anyone’s real world experience and recommendations with regard to this requirement. Is it realistic? A little bit about our environment: Less than 25 users, and around 75 computers/servers in our current AD system. These systems will be responsible for normal AD operations and print servers for 5 printers - nothing to big here.

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• How can I reverse connect with vncconnect or vncconfig with ubuntu as the server?

  - by yan bellavance

  On a windows machine I am running: "listening VNC viewer" From a Ubuntu machine, I need to reverse connect to the windows machine but it does not seem to be working. I was able to make it work between 2 windows machines, but I need it to work with Ubuntu as the server as well. I tried vncconnect -display $DISPLAY 192.168.1.134:5500 and nothing happens. So instead I tried vncconfig but I get the message : "No VNC extension on display :0.0" Any ideas? If this is the wrong site just send me a comment I'll close the question.

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• How can you change the OST data file that a Windows/Outlook email profile points to?

  - by Howiecamp

  I'm running Outlook 2007 on Windows 7. I'd like to change the OST data file that a Windows/Outlook email profile points to. I've attempt to change it as follows: Go in to the "Mail" Control Panel applet Click the "Data Files..." button Double-click the particular email account Click the "Advanced" tab Click the "Offline Folder File Settings..." button The resulting dialog box has the "File:" textbox and the "Browse" button disabled. I've searched the registry for a match (so I could possibly change it there) but found nothing.

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