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  • Monitor is flashing through camera but not in the naked eye

    - by odyodyodys
    Two monitors: Samsung T23C350 - Samsung 2243NW Lets call the first A and the other B. A is a LED monitor with a 2ms response time (in specs) with a native resolution of 1920*1080@60Hz B is an older not-led one with 5ms response in specs with a resolution of 1680*1050@60Hz In the attached images and video you'll see that A (on the LEFT) is flickering but this is not visible to the naked eye. I took some pictures and videos with a camera and a mobile phone. This is also happening to all digital camcorders I've tested. A has a setting response time with values normal, fast, fastest. No matter the setting, the effect is the same. A on the left and B on the right. You can see the flickering, although both are @60Hz A video where you can see both monitors. A is always the left monitor. Another video where you can see what my digital camera sees. Another thing is that I managed to get a picture where the left monitor is completely black whilst the right one is displaying fine. This proves that the monitor is continuously flashing. My question is: Is this normal behavior and what is causing it? Am I affected by this fast flickering? I am using this as my primary monitor and as a programmer I have to keep my eyes on it for hours.

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  • libtldl not found - chekc libtool installation!

    - by lowgain
    I'm on Fedora 8, trying to configure/make libmp3splt, and every time I try to compile I get libtldl not found - chekc libtool installation! I have libtool installed, and some places online said to try installing libltdl-dev, which does't seem to exist for me to install. Missing anything? Thanks!

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  • http benchmarking?

    - by Sam Williams
    im running varnish-nginx(php-fpm) and im using ab but it keeps messing up. [root@localhost src]# ab -k -n 100000 -c 750 http://192.168.135.12/index.php This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0 Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Copyright 2006 The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.135.12 (be patient) apr_socket_recv: Connection reset by peer (104) is there anything else i can use? or am i doing it wrong?

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  • Use of backreferences in fail2ban filters possible?

    - by Izzy
    From time to time, I see collections of suspect "File not found" errors in my Apache logs, basically using the pattern File does not exist: /var/www/file, referer: http://my.server.com/file In human terms: The file was not found, though it referenced here itself. A clear hacking attempt, as that's hardly possible (and the REQUEST_URIs often enough suggest the same). In my eyes a clear case for fail2ban – if I could get backreferences to work here: failregex = ^%(_apache_error_client)s File does not exist: /var/www(.+), referer: http://.+\1$ (Justin Case: above examples assume the DIRECTORY_ROOT of that webserver being /var/www) I googled for hours, searched the fail2ban wiki up and down – but nowhere I could find a statement concerning backreferences in its filters. Are they not supported, or did I do it the wrong way? Any hints how to make it work (except from "dirty hacks" like first sending the request to another fake url using mod-rewrite, and then catching on that (if anyone is interested, I can elaborate on that approach in an answer), or doing something similar using mod-security)? as an entire log line was requested: [Fri Nov 08 14:57:28 2013] [error] [client 50.67.234.213] File does not exist: /var/www/text/files.htm++++++++++++++++++++++++++Result:+using+proxy+27.34.142.47:9090;+no+post+sending+forms+are+found;, referer: http://www.myserver.com/text/files.htm++++++++++++++++++++++++++Result:+using+proxy+27.34.142.47:9090;+no+post+sending+forms+are+found; (sorry, logs were just switched, so this long candidate was the only one left currently; minor adjustments were made for privacy reasons)

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  • Ubuntu 9.10 Technika H16WC-01 Webcam

    - by user32976
    I know this is a lame cheap web camera, thus making it all the harder for me to find information about it. Ubuntu seems to recognise it, putting it in as /dev/video0 Skype is able to see that the web cam is there, but can not get any picture data. Flash doesn't even pick up that the web cam exists. I feel foolish asking such a lame question... but any help will be cool beans!

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  • IIS7 - Basic Authentication Module missing?

    - by FlySwat
    I'd like to use basic HTTP authentication to keep people out of our dev site instance since it is unfortantly exposed to the wild internet. However, in IIS7, the only authentication modes listed are Forms, Anonymous and Impersonation. Where did the "Basic Authentication" module go, and how can I get it back?

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  • What is the garbage text that is being printed by wvdial in terminal?

    - by Hrishi
    When I dial using wvdial, sometimes it prints some garbage text into the terminal. This is not happening every time, but in the garbage text I can see some readable strings which is often irc logs(from xchat) or GET requests from the browser. One of my friend told me that this is probably something it's reading from /dev/random for Random entropy, but I couldn't find any supporting information. What is this text, and why is it being printed to the terminal? See the below picture for an example:

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  • Advice on moving a machine room to a new location?

    - by MikeJ
    Our company is moving to new offices in a couple of months, and I am responsible for looking after the move of the development servers in the company. most of the dev equipment is in 5, 42U cabinets + rack for switching/routing equipment. How do most people do this sort of thing? Move the cabinent whole or extract the indvidual components and move the racks empty. any advise on prep and shutdown before the move would be welcome

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  • Cross-platform restart of Apache

    - by l0b0
    I'd like to have a single command that'll restart Apache on any *nix OS. Currently I'm working with Ubuntu, which has /usr/sbin/apache2ctl /usr/sbin/service no apachectl no httpd and Scientific Linux CERN 5, which has /usr/sbin/apachectl /etc/init.d/httpd no apache2ctl no service I'd like to avoid using a hack like which service 2>/dev/null || which /etc/init.d/httpd

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  • How to fix grub after moving root partition?

    - by Grzenio
    Hi, Because I am using one of the new WD disks I am trying to aling my root partition with the real sectors, as described here: http://community.wdc.com/t5/Desktop/Problem-with-WD-Advanced-Format-drive-in-LINUX-WD15EARS/m-p/10920#M631 So I copied all files to a temp location, deleted my partition (/dev/sda3), recreated it a few cylinders later (same name) and copied the files to the newly created partition. But now when I try to boot, I get my old grub menu but after selecting my kernel version it hangs... Any idea how I can fix it?

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  • Use bootable vhd with Virtualbox

    - by user18151
    Hello, I want to create a bootable Windows 7 vhd using the steps mentioned at: http://www.microsoft.com/downloads/details.aspx?FamilyID=80ede31d-3509-407b-a896-0beea8705589&displaylang=en However, I wanted to know if I will be able to access the vhd using Virtualbox too. I intend to install VS2008 in the VM and use it in Virtualbox when doing quick work and on native hardware when doing a lot of work. I don't want to mess up my actual Win7 installation with VS2008 dev work.

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  • RHEL json gem installation requires make?

    - by Salahuddin559
    When I try to install json gem (gem install json), at first it fails to do so, because of some dev package issue. After fixing it, it fails saying that "sh: make: command not found" and "ERROR: Error installing json: ERROR: Failed to build gem native extension.". Why is it failing on make? Notice this is not Mac, this is in RHEL 5 (4 or 5, not sure). Why is it not able to do some "build gem native extension"?

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  • Deny login from certain hosts if logging in with specific sql credentials

    - by Dave
    I want to stop some of our developers from connecting to the production sql server using a specific sql account. They have rights to connect through windows authentication with lower rights. They claim that changing the password will affect too many other processes running on our processing machine. So I want to deny access if they're connecting from there dev machines for now. Another way this would work is if I could just allow connections from one specific host.

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  • Nagios shell script cannot be executed

    - by MeinAccount
    I'm trying to monitor GitLab with nagios. I've created the following command definition and shell script but when checking the service I'm receiving the following e-mail. How can I solve this? The file is executable. [...] nagios : 3 incorrect password attempts ; TTY=unknown ; PWD=/ ; USER=git ; COMMAND=/bin/bash -c /var/lib/nagios/custom_plugins/check_gitlab.sh Command definition: define command { command_name custom_check_gitlab command_line /var/lib/nagios/custom_plugins/check_gitlab.sh } Shell script: #! /bin/sh # [...] RAILS_ENV="production" # Script variable names should be lower-case not to conflict with internal /bin/sh variables such as PATH, EDITOR or SHELL. app_root="/home/git/gitlab" app_user="git" unicorn_conf="$app_root/config/unicorn.rb" pid_path="$app_root/tmp/pids" socket_path="$app_root/tmp/sockets" web_server_pid_path="$pid_path/unicorn.pid" sidekiq_pid_path="$pid_path/sidekiq.pid" ### Here ends user configuration ### # Switch to the app_user if it is not he/she who is running the script. if [ "$USER" != "$app_user" ]; then sudo -u "$app_user" -H -i $0 "$@"; exit; fi # Switch to the gitlab path, if it fails exit with an error. if ! cd "$app_root" ; then echo "Failed to cd into $app_root, exiting!"; exit 1 fi ### Init Script functions check_pids(){ if ! mkdir -p "$pid_path"; then echo "Could not create the path $pid_path needed to store the pids." exit 1 fi # If there exists a file which should hold the value of the Unicorn pid: read it. if [ -f "$web_server_pid_path" ]; then wpid=$(cat "$web_server_pid_path") else wpid=0 fi if [ -f "$sidekiq_pid_path" ]; then spid=$(cat "$sidekiq_pid_path") else spid=0 fi } # Checks whether the different parts of the service are already running or not. check_status(){ check_pids # If the web server is running kill -0 $wpid returns true, or rather 0. # Checks of *_status should only check for == 0 or != 0, never anything else. if [ $wpid -ne 0 ]; then kill -0 "$wpid" 2>/dev/null web_status="$?" else web_status="-1" fi if [ $spid -ne 0 ]; then kill -0 "$spid" 2>/dev/null sidekiq_status="$?" else sidekiq_status="-1" fi } check_pids check_status if [ "$web_status" != "0" -a "$sidekiq_status" != "0" ]; then echo "GitLab is not running." exit 2 fi if [ "$web_status" != "0" ]; then printf "The GitLab Unicorn webserver is \033[31mnot running\033[0m.\n" exit 1 fi if [ "$sidekiq_status" != "0" ]; then printf "The GitLab Sidekiq job dispatcher is \033[31mnot running\033[0m.\n" exit 1 fi if [ "$web_status" = "0" -a "$sidekiq_status" = "0" ]; then printf "GitLab and all it's components are \033[32mup and running\033[0m.\n" exit 0 fi

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  • Windows 7 notebook turn off by itself, how to check if it is due to CPU being too hot?

    - by Jian Lin
    I have a Dell Studio 15 notebook, and it just started turning off by itself yesterday. Could it be that the CPU is too hot? I have had several notebooks before and every one of them I can put them on the bed without any problem. This Dell Studio Notebook, however, seems like have the air / fan outlet pointed outward from the bottom back of the notebook, so I suspect that the air is partially blocked when it is on the bed. Are there Win 7 tools that can monitor the CPU temperature, or will some 3rd party tool be needed? (I try to stick to official tools nowadays). Also, it is running Win 7 Ulitmate, there is actually no utility or background service from Win 7 or from Dell that detects when the temperature is too hot (or 95% near the max), pop out a message box giving a warning and say that the computer will go into sleep mode in 1 minute, but instead just turn off the computer by brute force (cutting out the power) right then and there? Update: it turned off right in front of my eyes -- it is not doing any windows update or anything. just normal use and jooooop, it turned off.

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  • Mount Windows share on Linux boot

    - by Delameko
    I'm running VirtualBox in Windows. I have Linux 10.04 installed as a VM. Whenever I log in I have to run to following command to mount my shared Windows web dev folder: sudo mount.vboxsf web_apps /mnt/web_apps Where can I put this line (minus the sudo) so that it will run once when Linux boots up? I'm guessing there must be a root .profile or .login script that runs at some point?

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  • Possible to mount an ext4 partition image via FUSE?

    - by Catskul
    I'm attempting to mount an ext4 partition image in userspace. (no sudo, no special config/permissions modification to /dev/loop0 or /etc/fstab etc). So I'm hoping FUSE will come to the rescue. However it seems that each file system mounted through the FUSE system needs to have a special FUSE driver, and I've not been able to find a linux read-write ext4 FUSE driver for linux. Is there a way to mount ext4 images via FUSE (with write permission)?

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  • Why is pdf format used?

    - by dan_vitch
    I will admit that I am new to the tech/dev field. It seems to become a trend that every time I have to work with pdfs a part of me dies. Why is this format as ubiquitous as it seems to be? Is it just non-tech people that prefer pdfs?

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  • Tomato VPN connect but cannot ping LAN IP

    - by David Hamilton
    I've setup TomatoVPN using these settings on the server: TAP UDP 1194 Client address pool 10.10.9.1 -10.10.9.254 LAN clients are configured with 10.10.10.x I can connect from a remote client, but pinging anything in the 10.10.10.x results in a "Destination Host Unreachable" error. Here's my client configuration script: remote x.x.x.x 1194 client dev tap0 proto udp resolv-retry infinite nobind persist-key persist-tun float ca ca.crt cert client1.crt key client1.key ns-cert-type server Any suggestions as how I can make this properly bridge the two networks?

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  • Shouldn't emesene themes change the emesene indicator icon?

    - by D Connors
    As it stands right now, I can't get the emesene icon in the indicator applet (or notification area, or whatever it's named) to change. No matter what icon theme I choose, even installing new themes, the icon is always the default one. Is that a standard behavior, or am I getting a bug? I'm running the latest version of emesene from their ppa (1.6-dev), on Lucid Lynx.

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