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  • Tips for teaching Linux to beginners?

    - by chiborg
    I will teach Linux to people of the ages 20-75 with no prior Linux knowledge. I want to teach some basic concepts (what's an OS, what's a file system) and some practical knowlede: How to install it, network configuration, set up email client, installing software with a packet manager, etc. I have held a system administrators course in the past, but was under the impression that my method of teaching was not adequate. I've explained what I was about to show, showed students on the projector, told them to repeat it on their computers and summarized what they should have learned. They could ask questions all the time. But I fear they remembered only one-third of the knowledge I taught them. I have two questions here: Are there better methods to teach this particular subject in a classroom equipped with computers? Are there some tricks that "slow me down" when I teach stuff that I know inside-out?

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  • Routing traffic to another internal network

    - by Jason
    OK, so here is the scenario. I have 4 Locations connected with an MPLS. I have installed an ASA at the primary location which is 10.20.1.0. Traffic is fine internally and to the world, however... I can't route traffic over the MPLS to another network. It is being blocked by an implicit deny rule even though there is a rule to allow any to any less secure interface (it should be using the same interface in/out, right?). I have a static route for the network in and the ASA can ping it - Just not traffic on the internal network of the ASA. -Jason

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  • Rewrite rule Mod_Proxy truncate file name [duplicate]

    - by Valerio Cicero
    This question already has an answer here: Redirect, Change URLs or Redirect HTTP to HTTPS in Apache - Everything You Ever Wanted How to Know about Mod_Rewrite Rules but Were Afraid to Ask 5 answers I search online for the solution, but nothing :(. I write this simple rule RewriteRule ^(.*)$ http://www.mysite.com/$1 [P,NE,QSA,L] In mysite.it i have an .htaccess with this rule and it's ok, but if i have a link "http://www.mysite.it/public/file name.html" the server point to "http://www.mysite.it/public/file" I try many solution but i can't solve. I try this and many shades of... RewriteRule ^(.*)(%20)(.*)$ "http://www.mysite.com/$1$3" [P,NE,QSA,L] Thanks!

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  • Is there a way to modify the default size of a new side note in OneNote 2010?

    - by user1202747
    I am a fan of OneNote, but there is one aspect of it that makes it less useful than it could be. When I make a new side note (i.e. by clicking the OneNote icon in the system tray or pressing WindowsKey + N), the size of the window of the resulting note that opens is far too large. It probably takes up 20% of my reasonably high-res screen by default. I have to click and drag to resize it, and that's a waste of my time. So, I have a two part question: Is there a way of modifying some settings somewhere (perhaps in the registry?) so that the default window size of a new side note is smaller than the default? I would prefer something more in line with the size of a new "sticky" note in OS X. If not, does anyone know of a fast way to shrink the size of a window using the keyboard? I'd appreciate any advice that anyone can give. Thanks.

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  • How to install cURL with openssl on ubuntu server ?

    - by Hrishikesh Choudhari
    Hey, I am having a problem with cURL here. My localhost has curl with openssl enabled, and thus my php code works fine. On running phpinfo() I get the following -- curl cURL support enabled cURL Information libcurl/7.19.5 OpenSSL/0.9.8g zlib/1.2.3.3 libidn/1.15 However, on my other office server, curl does not have openssl support enabled. On running phpinfo() I get the following -- curl cURL support enabled cURL Information libcurl/7.20.1 zlib/1.2.3.3 How do I get openssl support for curl ? Both - openssl and curl - are installed on the office server as of now. I require immediate help. Thank you.

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  • Slowdown after repeated hibernation in XP SP3

    - by John
    I have a Dell laptop w/dual core and 4 gigs of memory. Recently my machine has started to go off in never never land for 5 to 20 minutes at a time with a lot of hard drive churning. Eventually it comes back and everything operates properly. If I manage to have task manager up CPU usage shows no more then 3 to 5% during this process. I am on a corporate network and have very good virus protection in place. The problem seems to have increased in frequency since I let an update happen to IE8 and/or I started using hibernate more frequently. Any ideas or suggestions? TIA J

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  • IIS 7 AppPool logs an error after recycle due to inactivity

    - by ddysart
    We have Windows 2008 RS Server running IIS hosting an ASP.NET site. This morning there was a weird sequence. First a notice that the AppPool was being recycled due to inactivity: "A worker process with process id of '6896' serving application pool 'xxxx' was shutdown due to inactivity. Application Pool timeout configuration was set to 20 minutes. A new worker process will be started when needed." This makes sense and jibes with out timeout settings, but 30 seconds later we see: "A process serving application pool 'xxxx' terminated unexpectedly. The process id was '6896'. The process exit code was '0xc0000005'." I found an older KB article that explains a condition where this might happend on IIS6 due to permission issues, but am curious what might cause this on IIS7.5, especially since we are not seeing it regularly.

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  • private address in traceroute results

    - by misteryes
    I use traceroute to check paths on a remote host, and I notice that there are some private IPs, like 10.230.10.1 bash-4.0# traceroute -T 132.227.62.122 traceroute to 132.227.62.122 (132.227.62.122), 30 hops max, 60 byte packets 1 194.199.68.161 (194.199.68.161) 1.103 ms 1.107 ms 1.097 ms 2 sw-ptu.univ.run (10.230.10.1) 1.535 ms 1.625 ms 2.172 ms 3 sw-univ-gazelle.univ.run (10.10.20.1) 6.891 ms 6.937 ms 6.927 ms 4 10.10.5.6 (10.10.5.6) 1.544 ms 1.517 ms 1.518 ms why there are private addresses near the host? what are the purposes that these private addresses are used? I mean why they want to put the public IP behind private IPs? thanks!

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  • Recommended Configuration to setup Tomcat 7 on windows OS

    - by yashbinani
    I have created a small web application using java/jee which will be deployed in LAN environment. I want to know the recommended hardware configuration. Details are as follows 1) Expected number of hits: 20 hits / hour 2) Number of clients 5-7 3) Application Server : Tomcat 7 4) Database server : MySql App and DB shall be deployed on same machine 5) OS Configuration : Windows XP or any unix flavour ? Can a simple p4/celeron machine with 1 gb ram 8-10 GB hard disk will be sufficient to cater client requests? Server will not be storing too many files/images/videos Client does not want to spend too much on infrastructure.

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  • Execution plan different on two different Sql Servers

    - by Lieven Cardoen
    On our sql server, a query takes 20 ms. If I look at the execution plan, parallelism is used, hash match, Bitmap create, ... a lot of images with two arrows pointing to the left. On sql server of a customer where our product runs, the same query takes 2500 ms. If I look at their execution plan, no parallelism or any of the things with arrows are used... I've been searching for a couple of days no why the query runs so much slower on their sql server. Is parallelism and all of the other things something that can be configured on their sql server? And how to you configure that? What are the dangers of using parallelism? Another strange thing is that on our server, the query needs some 1200 reads and 0 writes. On their sql server it needs 1.5 million reads and some 1500 writes. Why these writes when a read query is done?

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  • Lot of Multicast traffic on LAN

    - by Nel
    Recently the whole network at work is being hit by multicast traffic originating on the LAN itself. I did some investigating and the service which seems to be responsible is ws-discovery. I have attached a screenshot of wireshark capturing the traffic. I have tried shutting down the source machine from which it was originating, but the multicast traffic still seems to be present in the network. My network topology 2 subnets - 10.10.10.0/24 and 10.20.10.0/24. Gateway is a debian system. We have 3 switches for 3 floors. They are all unmanaged Dlink 24-port switches. Multicast blocking at switch level is out of the question. Any solutions? :(

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  • Installing software after .wim image

    - by lross1309
    I have been looking all day into how to install software to a .wim image. I have a .wim image of a laptop that will be deplyed to 20 more. The image is pretty much good to go except I need to add a couple more drivers and a couple more applications. Is there a way to do this in the answer file? Do I have to deploy the image, install the drivers/application, sysprep, and recapture the image? Any information relating to this will be greatly appreciated. Leon ps I have only been using answer files and imagex. Would like to stick with this for the time being. I plan on using WDT and WDS when I have some time to learn about it.

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  • How do I use long names to refer to Group Managed Service Accounts (gMSA)?

    - by Jason Stangroome
    Commonly domain user accounts are used as service accounts. With domain user accounts, the username can easily be as long as 64 characters as long as the User Principal Name (UPN) is used to refer to the account, eg [email protected]. If you still use the legacy pre-Windows 2000 names (SAM) you have to truncate it to ~20 characters, eg mydomain\truncname. When using the New-ADServiceAccount PowerShell cmdlet to create a new Group Managed Service Account (gMSA) and a name longer than 15 characters is specified, an error is returned. To specify a longer name, the SAM name must be specified separately, eg: New-ADServiceAccount -Name longname -SamAccountName truncname ... To configure a service to run as the new gMSA, I can use the legacy username format mydomain\truncname$ but using usernames with a maximum of 15 characters in 2013 is a smell. How do I refer to a gMSA using the UPN-style format instead? I tried the longname$@domainfqdn approach but that didn't work. It also seems that the gMSA object in AD doesn't have a userPrincipalName attribute value specified.

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  • asterisk send mute command to jukebox on incoming call

    - by Jona
    Hi, We're trialling a Asterisk Now server to take over from our ageing PBX system. One of the "nice to have" features would be the ability to pause or lower the volume on the office jukebox if an incoming call is detected. We currently run a linux jukebox which plays music out of the speakers using mpd and can be controlled by the mpc client. We can manually issue the following command to achieve this: mpc volume 20 Does anyone know how to get asterisk to execute this command or some action that we could hook into when a phone call is incoming to specific extensions?

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  • At what point does Active Directory and Domain Services become necessary? [closed]

    - by user970638
    I see time and time again such services running in a business environment with only 10 users. Everyone in the office authenticates with the DC and interacts with a shared drive where files and documents are stored. I can't help but think...reeeeealy? But I don't know, that's why I'm asking. To me it seems like you need to reach a certain threshold of size and needs before you throw a DC into the mix. ie: a 20+ user business (and growing) with permission requirements that separate the sales team from accounting. Thoughts?

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  • iMac goes black, makes clicking sound... thoughts?

    - by Josh
    This is the second time this has happened. The display on my Apple iMac (20-inch Late 2006) just went black, system was completely unresponsive to mouse/keyboard input, I could not SSH into nor ping the machine, and it didn't show up in ARD. I could hear a fairly loud clicking noise from inside which sounded like the DVD drive trying to seek -- but there is no disc in the drive. It could possibly be the hard drive... I pressed the power button and the system powered off, and now will not power on again. Thoughts / suggestions as to next course of action?

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  • Causes of hard crashes on Windows XP and how to debug

    - by Sam Brightman
    I am occasionally seeing hard lockups on XP: totally unresponsive to keyboard/mouse, screen freezes at time of crash, no SSH/VNC possible. Very intermittent, nothing in the logs. I never see a blue screen on any kind of error message. This morning I logged in via VNC, logged out again, 20 minutes later physically sat at PC and it crashed around the time of VNC logout. I tend to suspect video cards in these kind of situations but it's a modern-ish card with modern drivers (one revision back, but this has been happening for 5 revisions or more) and normally would at least see a blue screen I expect. What would you suspect? Where can I look or what can I set up for more information? Bear in mind that this happens about once every 3 or 4 weeks, so extensive logging or intrusive monitoring isn't really an option.

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  • vnc connection from linux to windows ce

    - by JosiP
    Im having troubles while im trying to connect from linux to Windows CE, via VNC viewer. Here is what i can see on log: /usr/bin/vncviewer 10.1.1.57 VNC Viewer Free Edition 4.1.2 for X - built Apr 20 2011 12:04:25 Copyright (C) 2002-2005 RealVNC Ltd. See http://www.realvnc.com for information on VNC. Tue Jul 2 12:15:04 2013 CConn: connected to host 10.1.1.57 port 5900 CConnection: Server supports RFB protocol version 3.5 CConnection: Using RFB protocol version 3.3 TXImage: Using default colormap and visual, TrueColor, depth 24. CConn: Using pixel format depth 6 (8bpp) rgb222 CConn: Using ZRLE encoding I cannot see anything - only black screen. Restarting device does not help. Device is connected directly to machine by crossed ethernet cable, and its IP is assigned by DHCP. Any clues, ideas, what can i do to get normal view ? best regards J.

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  • How do I make h.264 work on YouTube on Firefox on Windows 7 64 bit?

    - by Ansis Malins
    Various news articles state that Firefox supports h.264 on Windows since version 20. As of this writing the version is 24, yet Firefox still can't play most YouTube videos. I did the HTML5 opt-in and tested both Firefox and Nightly. I also made sure media.windows-media-foundation.enabled in about:config is enabled, and it is by default both on Firefox and Nightly. What's wrong and how do I fix it? Edit: This video works. This video fails. They're both MP4 (right click video - stats for nerds), so Firefox's h.264 support works at least some of the time. Edit: When I go to a YouTube video that doesn't work, click Share - Embed and then copy-paste the src of the iframe tag into the address bar, the video works.

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  • Intgrating windows 2000 server in a windows 2008 domain [on hold]

    - by user199121
    I have a network enviroment where my windows 2000 server is just acting as fileserver for sharing, so all the users has an account there with username, password and a list of access rights. Now i want to keep this server cause i am running from there an application that 20 users access but also i want to add a new Windows 2008 R2 64 bit server as a domain controller. Is this possible ? 1-It is ok to make the new windows 2008 server a domain controller ? 2- I want all the users accounts to be the same in the domain controller so they can still use the same username and password to login into the domain as well into the windows 2000 server that is setup as a Workgroup. 3- Do i need to do something to the windows 2000 sever to still be functional in the environment so it can be accessed by the clients computers? note:My clients computers are windows 2000 pro, xp pro and windows 7 32/64 bit. Thanks in advance

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  • Jenkins shows same information for all projects

    - by SuperCabbage
    I've been using Jenkins for the last month or so and what started out as a small issue has gotten worse and worse. I have 10 projects in Jenkins, all polling from different Git repos and building to different environments but they all show the same details on the dashboard. I can still build the projects, but I have to manually enter the URL to see any console output etc. I'm running 1.536 under Ubuntu 12.04, there's not much in the logs other than the following; Oct 22, 2013 2:21:19 PM WARNING jenkins.model.lazy.AbstractLazyLoadRunMap search JENKINS-15652 Assertion error #1: failing to load /data/builds #20 EXACT: lo=23,hi=9,size=23,size2=23 – Any ideas?

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  • collectd:Monitoring server not showing clients

    - by Quintin Par
    I have setup a monitoring server with the following setup. <Plugin network> Listen "0.0.0.0" "25826" </Plugin> Now my clients are sending data to the monitoring server(verified through tcpdump). Even the collection folder shows that the data is being dumped /var/lib/collectd/rrd [ec2-user at x rrd]$ ll total 4 drwxr-xr-x 11 root root 4096 Nov 20 17:53 x-web-1.y.com [ec2-user at x rrd]$ I have also verified with find . -mmin 1 to see if its being constantly updated. [ec2-user@x rrd]$ find . -mmin 1 ./x-web-1.y.com/interface-eth0/if_errors.rrd ./x-web-1.y.com/interface-eth0/if_packets.rrd ./x-web-1.y.com/interface-eth0/if_octets.rrd ./x-web-1.y.com/disk-xvda1/disk_time.rrd ./x-web-1.y.com/disk-xvda1/disk_ops.rrd ./x-web-1.y.com/disk-xvda1/disk_octets.rrd ./x-web-1.y.com/disk-xvda1/disk_merged.rrd But when i look it up through collectd-web, I don't see the clients What might be wrong in my setup?

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  • Why is the reported user "root" when a "normal user" executes "ps ux" on OSX? Is this normal behavio

    - by snies
    I am running OS X 10.6.1 . When i am logged in as a normal user of group staff and do a ps ux it lists my ps ux command as being run by root: snies 181 0.0 0.3 2774328 12500 ?? S 6:00PM 0:20.96 /System/Library... root 1673 0.0 0.0 2434788 508 s001 R+ 8:16AM 0:00.00 ps ux snies 177 0.0 0.0 2457208 984 ?? Ss 6:00PM 0:00.52 /sbin/launchd snies 1638 0.0 0.0 2435468 1064 s001 S 8:13AM 0:00.03 -bash Is this normal behaviour? And if so why? Please note that the user is not an Administrator account and is not able to sudo.

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  • Rendering Machine Configuration [closed]

    - by user1184598
    I would like to buy a computer for Rendering purpose. The Rendering is based on DirectX in Windows 7. It needed to support multi-thread rendering which is highly demanding (around 20 threads doing rendering and connection to MS SQL Server job simultaneously). Could I have some suggestion on the configuration of the computer? e.g. what kind of CPU, GPU, Mother Board should be used? The budget is around US$1000. Thank you very much.

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  • ssh port forwarding freezes after 10 simultaneous connections

    - by Marko Kevac
    Hello. I am using port forwarding to utilize proxy server which is on remote machine. Remote machine hostname is remotemachine. Proxy is listening on 8118 port. I am translating this port to local port 5223. ssh -vvv -N remotemachine -L 5223:localhost:8118 Everything is fine if I don't use more than 10 simultaneous connections, when ssh just freezes. It no longer send data trough port forwarding. I.e. ab -c 10 -t 5 -X 'localhost:5223' 'http://www.google.ru/' works, but ab -c 20 -t 5 -X 'localhost:5223' 'http://www.google.ru/' causes ssh to freeze MaxSessions 30 parameter in /etc/ssh/sshd_config didn't helped at all. What can I do to remove this 10 connection limit? Nothing interesting in -vvv output =(

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