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  • Remote monitoring with screen capture

    - by Anonymous
    Is there anyway i can perodically take screenshots of a remote computer using nagios? I am experimenting with Nagios, and i am trying to explore different monitoring. So my question is apart from using nagios to monitor cpu usage, bandwidth utilization, uptime etc.. can i monitor my worker's productivity by checking what is he doing on his computer in a form of image output. Being able to monitor processes would not be of much help to me, as i only know if he or she is running firefox.exe for example he maybe using excessive use of firefox for facebook or other stuff but he claims he is troubleshooting and looking for solutions on forums. I saw a check_vnc script but i am unable to install the requsite vnc server anyone succesfully tried the vnc script care to share how to go about it? If not anyother way to try this?

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  • Email notification and mail server

    - by Jerr Wu
    I am building a web application with email notification just like Facebook, which will host in http://www.linode.com/. When a user A comment to a post, the poster will get an email notification from '[email protected]' with the comment message written by user A. (Not spam) I really like Google Apps but they have sending limits 2000 sending per day, that is not suit for my case becuz I cannot have sending limits. There will be many email notifications. http://support.google.com/a/bin/answer.py?hl=en&answer=166852 I also need company email accounts for team members use which I prefer Google Apps. My web application will host in linode, I am considering "Amazon Simple Notification Service" for the email notification. My questions are Any other recommend email service provider suits my case for me? Can I bind company email accounts(ex: [email protected]) with Google Apps and bind [email protected] with other email service provider?

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  • apache2: Require valid-user for everything except "special_page"

    - by matt wilkie
    With Apache2 how may I require a valid user for every page except these special pages which can be seen by anybody? Thanks in advance for your thoughts. Update in response to comments; here is a working apache2 config: <Directory /var/www/> Options Indexes FollowSymLinks MultiViews Order allow,deny allow from all </Directory> # require authentication for everything not specificly excepted <Location / > AuthType Basic AuthName "whatever" AuthUserFile /etc/apache2/htpasswd Require valid-user AllowOverride all </Location> # allow standard apache icons to be used without auth (e.g. MultiViews) <Location /icons> allow from all Satisfy Any </Location> # anyone can see pages in this tree <Location /special_public_pages> allow from all Satisfy Any </Location>

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  • Save static version of a webpage to be available offline

    - by Tal Weiss
    Is there a way to save a webpage as static HTML, available for offline viewing, editing etc.? I want to remove all javascript files. Leave only HTML, CSS and images. For example, if this web page has a Facebook Like button, I want the image of the button to be part of the HTML as a regular image (and not be loaded as some Javascript code runs after I load the page). I'm trying to prepare a webpage for an offline demo. When I use the standard "save as HTML complete" like tools, all the Javascript is saved as well, and when viewed offline, all the dynamic content is blanks. Note- I don't expect the dynamic content to work, of course, with no Javascript. I just want the web page to LOOK as though it was just loaded from the interwebs. Thanks, Tal.

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  • Find optimal/good-enough strategy and AI for the game 'Proximity'?

    - by smci
    'Proximity' is a strategy game of territorial domination similar to Othello, Go and Risk. Two players, uses a 10x12 hex grid. Game invented by Brian Cable in 2007. Seems to be a worthy game for discussing a) optimal algorithm then b) how to build an AI. Strategies are going to be probabilistic or heuristic-based, due to the randomness factor, and the insane branching factor (20^120). So it will be kind of hard to compare objectively. A compute time limit of 5s per turn seems reasonable. Game: Flash version here and many copies elsewhere on the web Rules: here Object: to have control of the most armies after all tiles have been placed. Each turn you received a randomly numbered tile (value between 1 and 20 armies) to place on any vacant board space. If this tile is adjacent to any ally tiles, it will strengthen each tile's defenses +1 (up to a max value of 20). If it is adjacent to any enemy tiles, it will take control over them if its number is higher than the number on the enemy tile. Thoughts on strategy: Here are some initial thoughts; setting the computer AI to Expert will probably teach a lot: minimizing your perimeter seems to be a good strategy, to prevent flips and minimize worst-case damage like in Go, leaving holes inside your formation is lethal, only more so with the hex grid because you can lose armies on up to 6 squares in one move low-numbered tiles are a liability, so place them away from your main territory, near the board edges and scattered. You can also use low-numbered tiles to plug holes in your formation, or make small gains along the perimeter which the opponent will not tend to bother attacking. a triangle formation of three pieces is strong since they mutually reinforce, and also reduce the perimeter Each tile can be flipped at most 6 times, i.e. when its neighbor tiles are occupied. Control of a formation can flow back and forth. Sometimes you lose part of a formation and plug any holes to render that part of the board 'dead' and lock in your territory/ prevent further losses. Low-numbered tiles are obvious-but-low-valued liabilities, but high-numbered tiles can be bigger liabilities if they get flipped (which is harder). One lucky play with a 20-army tile can cause a swing of 200 (from +100 to -100 armies). So tile placement will have both offensive and defensive considerations. Comment 1,2,4 seem to resemble a minimax strategy where we minimize the maximum expected possible loss (modified by some probabilistic consideration of the value ß the opponent can get from 1..20 i.e. a structure which can only be flipped by a ß=20 tile is 'nearly impregnable'.) I'm not clear what the implications of comments 3,5,6 are for optimal strategy. Interested in comments from Go, Chess or Othello players. (The sequel ProximityHD for XBox Live, allows 4-player -cooperative or -competitive local multiplayer increases the branching factor since you now have 5 tiles in your hand at any given time, of which you can only play one. Reinforcement of ally tiles is increased to +2 per ally.)

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  • Add note model in Rails

    - by dannymcc
    Hi Everyone, I am following the 15 minute blog tutorial on Ruby on Rails .com: http://media.rubyonrails.org/video/rails_blog_2.mov and am stumbling into some issues. I am using the following alterations to the names in the tutorial: posts = kases comments = notes I have setup the models as follows: class Kase < ActiveRecord::Base validates_presence_of :jobno has_many :notes belongs_to :company # foreign key: company_id belongs_to :person # foreign key in join table belongs_to :surveyor, :class_name => "Company", :foreign_key => "appointedsurveyor_id" belongs_to :surveyorperson, :class_name => "Person", :foreign_key => "surveyorperson_id" def to_param jobno end and... class Note < ActiveRecord::Base belongs_to :kase end The Notes controller look like this: # POST /notes # POST /notes.xml def create @kase = Kase.find(params[:kase_id]) @note = @kase.notes.build(params[:note]) redirect_to @kase end and the database scheme for Kases looks like this: create_table "notes", :force => true do |t| t.integer "kase_id" t.text "body" t.datetime "created_at" t.datetime "updated_at" end and for kases... create_table "kases", :force => true do |t| t.string "jobno" t.date "dateinstructed" t.string "clientref" t.string "clientcompanyname" t.text "clientcompanyaddress" t.string "clientcompanyfax" t.string "casehandlername" t.string "casehandlertel" t.string "casehandleremail" t.text "casesubject" t.string "transport" t.string "goods" t.string "claimantname" t.string "claimantaddressline1" t.string "claimantaddressline2" t.string "claimantaddressline3" t.string "claimantaddresscity" t.string "claimantaddresspostcode" t.string "claimantcontact" t.string "claimanttel" t.string "claimantmob" t.string "claimantemail" t.string "claimanturl" t.string "lyingatlocationname" t.string "lyingatlocationaddressline1" t.string "lyingatlocationaddressline2" t.string "lyingatlocationaddressline3" t.string "lyingatlocationaddresscity" t.string "lyingatlocationaddresspostcode" t.string "lyingatlocationcontactname" t.string "lyingattel" t.string "lyingatmobile" t.string "lyingatlocationurl" t.text "comments" t.string "invoicenumber" t.string "netamount" t.string "vat" t.string "grossamount" t.date "dateclosed" t.date "datepaid" t.datetime "filecreated" t.string "avatar_file_name" t.string "avatar_content_type" t.integer "avatar_file_size" t.datetime "avatar_updated_at" t.datetime "created_at" t.datetime "updated_at" t.string "kase_status" t.string "invoice_date" t.integer "surveyorperson_id" t.integer "appointedsurveyor_id" t.integer "person_id" t.string "company_id" t.string "dischargeamount" t.string "dishchargeheader" t.text "highrisesubject" end Whenever I enter a note into the kase show view's note entry form: <h2>Notes</h2> <div id="sub-notes"> <%= render :partial => @kase.notes %> </div> <% form_for [@kase, Note.new] do |f| %> <p> <%= f.label :body, "New Note" %><br /> <%= f.text_area :body %> </p> <p><%= f.submit "Add Note" %></p> <% end %> partial: <% div_for note do %> <p> <strong>Created <%= time_ago_in_words(note.created_at) %> ago</strong><br /> <%= h(note.body) %> </p> <% end %> I get the following error: ActiveRecord::RecordNotFound in NotesController#create Couldn't find Kase with ID=Test Case I have tried removing the def to_param jobno end from the kase model, but the same error shows. Any ideas what I'm missing? Thanks, Danny

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  • Setting the Timezone with an automated script

    - by Tom
    I'm writing scripts to automate setting up new slicehost installations. In a perfect world, after I started the script, it would just run, with no attention from me. I have succeeded, with one exception. How do I set the timezone, in a permanent (survive reboot) and sane (adjust for standard and daylight savings time, so no just forcing the date) ... manner that doesn't require input from me? Currently, I'm using dpkg-reconfigure tzdata This doesn't seem to have any way to force parameters into it. It demands user input. EDIT: I'm editing here, rather than commenting, since comments don't seem to allow code blocks. Here's the actual code I ended up with, based on Rudedog's comment below. I also noticed that this doesn't update /etc/timezone. I'm not certain who uses that, but in case anybody does, I'm setting that too. TIMEZONE="America/Los_Angeles" echo $TIMEZONE > /etc/timezone cp /usr/share/zoneinfo/${TIMEZONE} /etc/localtime # This sets the time

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  • laptop overheating ran defraggler and now its not as hot

    - by Marko
    Trying to diagnose and fix an overheating Acer 5735 laptop, running speedfan and doing general workload to try and cause the overheat conditions. I notice that windows xp is badly fragmented according to defraggler, at 58% fragmentation. So I defrag whilst watching the speedfan window, which was at the start reporting high warning style symbols for all of the sensors. After the defrag, I rebooted and ran a few programs, and even defraggler again and the sensors in speedfan all reported green i.e. not high. Wondering if there is a correlation between windows fragmentation causing the hard drive to work harder and produce more heat inside the laptop? dont want to just assume that the problems are resolved, so either speedfan is not accurate enough or fragmentation can lead to additional hard drive heat? All comments or suggestions welcome.

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  • Help with running crontab from root

    - by user242065
    Im using OSX and having trouble getting a cron job to run. I type the following: $ sudo -i $ crontab -e I then enter: * * * * * root ifconfig en0 down > /dev/null 0 19 * * * root ifconfig en0 down > /dev/null 0 7 * * * root ifconfig en0 up > /dev/null and no success, the first line is for testing. I want it to shut off my internet. The next two lines I plan to leave in, once I get this working. If I type this in to the terminal the internet goes off ifconfig en0 down Why is my cron job not shutting down the internet? FYI: This is a follow up question from http://stackoverflow.com/questions/3027362/how-can-i-write-a-cron-job-that-will-block-my-internet-from-7pm-to-7am-so-i-can most of the comments there are people making fun of me. And a few attempts to solve the problem with out cron jobs.

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  • Best CMS to handle short snippets of text?

    - by Federico Poloni
    I have to install a CMS to manage a set of mathematical problems, i.e., our main content will be short (~3 lines) snippets of text. We need the ability to add comments and categories/tags, possibly with a powerful search function combining different constraints on the categories. A crucial ability is the possibility to combine the results of a search in the same page to produce a (printable) problem sheet: not many CMS's seem to be able to do so, and it is difficult for me to test every one for this specific function. Do you guys know of a CMS that is capable to return formatted search result in this fashion? Thanks in advance!

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  • arcserve vs backup exec vray

    - by Luigi
    I have to buy one backup software to backup a vmware environment with the following server/applications: mixed microsoft windows 2003/2008/2012 server standard environment sql server 2005/2008 mixed linux centos/ubuntu servers postgresql sap environment exchange 2007 linux fileservers windows fileservers active directory random applications/sqlserver/fileserver on workstations xp/7/8 my hardware is: 5 blades on ibm bladecenter, various san, lto4 on 4gbit fiber channel connected to a windows2003 blade where I will install the backup software (backupexec or arcserve). What are your advice and comments over backupexec vray or arcserve choice ? I know that arcserve have a lower price. I used backup exec for some years but I found it pretty complicated. Thank you.

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  • Rugged Netbook and software options for Running R statistical software?

    - by Thomas
    I am interested in purchasing a netbook to do field research in another country. My hardware specifications for the nebtook: -Be rugged enough to survive a bit of wear and tear -Fairly fast processing (the ability to upgrade from 1GB of RAM to 2GB) -A battery life of longer than 6 hours -At least a 10 inch screen -A decent camera for Skyping My software needs: -Be able run a Spreadsheet program to do basic data input (like Excel or Open Office) -Use the Open Source Statistical Program R to do basic data analysis (Regression, data analysis etc.) -Word Processing (Word or Open Office) Do you have any suggestions on which models or brands my fit my needs? Some of the models I was considering: Samsung NB-30 Toshiba NB 305 Asus Eee PC 1005HA Lenovo S10-2 Also any recommendations on the best software to load on the aforementioned Netbooks. I saw this resource from [livehacker][6] Any comments. Thanks for your help! -Thomas

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  • Writing a code example

    - by Stefano Borini
    I would like to have your feedback regarding code examples. One of the most frustrating experiences I sometimes have when learning a new technology is finding useless examples. I think an example as the most precious thing that comes with a new library, language, or technology. It must be a starting point, a wise and unadulterated explanation on how to achieve a given result. A perfect example must have the following characteristics: Self contained: it should be small enough to be compiled or executed as a single program, without dependencies or complex makefiles. An example is also a strong functional test if you correctly installed the new technology. The more issues could arise, the more likely is that something goes wrong, and the more difficult is to debug and solve the situation. Pertinent: it should demonstrate one, and only one, specific feature of your software/library, involving the minimal additional behavior from external libraries. Helpful: the code should bring you forward, step by step, using comments or self-documenting code. Extensible: the example code should be a small “framework” or blueprint for additional tinkering. A learner can start by adding features to this blueprint. Recyclable: it should be possible to extract parts of the example to use in your own code Easy: An example code is not the place to show your code-fu skillz. Keep it easy. helpful acronym: SPHERE. Prototypical examples of violations of those rules are the following: Violation of self-containedness: an example spanning multiple files without any real need for it. If your example is a python program, keep everything into a single module file. Don’t sub-modularize it. In Java, try to keep everything into a single class, unless you really must partition some entity into a meaningful object you need to pass around (and java mandates one class per file, if I remember correctly). Violation of Pertinency: When showing how many different shapes you can draw, adding radio buttons and complex controls with all the possible choices for point shapes is a bad idea. You de-focalize your example code, introducing code for event handling, controls initialization etc., and this is not part the feature you want to demonstrate, they are unnecessary noise in the understanding of the crucial mechanisms providing the feature. Violation of Helpfulness: code containing dubious naming, wrong comments, hacks, and functions longer than one page of code. Violation of Extensibility: badly factored code that have everything into a single function, with potentially swappable entities embedded within the code. Example: if an example reads data from a file and displays it, create a method getData() returning a useful entity, instead of opening the file raw and plotting the stuff. This way, if the user of the library needs to read data from a HTTP server instead, he just has to modify the getData() module and use the example almost as-is. Another violation of Extensibility comes if the example code is not under a fully liberal (e.g. MIT or BSD) license. Violation of Recyclability: when the code layout is so intermingled that is difficult to easily copy and paste parts of it and recycle them into another program. Again, licensing is also a factor. Violation of Easiness: Yes, you are a functional-programming nerd and want to show how cool you are by doing everything on a single line of map, filter and so on, but that could not be helpful to someone else, who is already under pressure to understand your library, and now has to understand your code as well. And in general, the final rule: if it takes more than 10 minutes to do the following: compile the code, run it, read the source, and understand it fully, it means that the example is not a good one. Please let me know your opinion, either positive or negative, or experience on this regard.

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  • Use linefeed or carriage return in Subversion commit message from the command line

    - by Scott
    I am using Subversion 1.6.6 on Ubuntu 10.04. I would like to insert a carriage return, or linefeed, or newline into my commit message so that when reading the log, the comments are formatted appropriately. It works fine when I use the system editor, or specify a file for the commit comment, but what I really want is to be able to do something like the following: svn ci -m "This is the first line\nThis is the second line" and have the comment presented as: This is the first line This is the second line My example does not work, it produces output: This is the first line\nThis is the second line So, is there a way to do this? If so, how?

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  • Understanding an Application based on the OS interaction with a Hypervisor

    - by Dewy
    Following I will ask a few specific questions but I will set the stage first. My goal is to monitor Applications in a very odd place - between the OS and a Hypervisor. If you have comments about this probably unachievable goal please do educate me. One good advice or link can save me days of work. Now to my current attempt. I installed on WinXP a VirtualBox (being open-source) and got a guest OS of latest Ubuntu running within. Where should I go next? Can I set the logs to show all memory/CPU/disk instructions of the guest OS? Thanks, Dewy

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  • Is it possible to use the MMM tool without virtual IP capability?

    - by Artem
    We are on a host (Serverbeach) that does not support Virtual/floating IPs until you reserve at least a half-rack, which is just a little more than we are willing to spend per month right now. We do have 2 machines in one of their datacenters, and I am using these 2 machines right now in the Master-Master in Active-Passive Mode just like done by MMM -- http://mysql-mmm.org/. I have just set them up and I managing them manually, with manual switch on the Web frontend to tell it to connect to the correct (active) master. Is there any way to use MMM without virtual IPs? Any other comments on this setup?

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  • Preventing a confirmation pop-up when updating fields in Word

    - by Gilles
    In Word 2007, an obvious candidate for updating all the fields in a range is myrange.Fields.Update But if the range is the element of ActiveDocument.StoryRanges corresponding to the footnotes, endnotes or comments, this triggers a confirmation pop-up “Word cannot undo this action. Do you want to continue?” What is this pop-up telling me about? How do I get rid of it (if it's not important)? An obvious workaround is to iterate over the fields and call each field's Update method. It doesn't fire up that question. But if I do this, what do I miss? following up to How do I update all fields in a Word document

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  • chroot'ing SSH home directories, shell problem.

    - by Hamza
    Hi folks, I am trying to chroot my SSH users to their home directories and it seems to work.. in a strange way. Here is what I have in my sshd_config: Match group restricthome ChrootDirectory %h The permissions on the user directories looks like this: drwxr-xr-x 2 root root 1024 May 11 13:45 [user]/ And I can see that the user logs in successfully: May 11 13:49:23 box sshd[5695]: Accepted password for [user] from x.x.x.x port 2358 ssh2 (with no error messages after this) But after entering the password the PuTTY window closes down. This is a wild guess, but could it be because the user's shell is set to /bin/bash and it can't execute because of the chroot? If so, could you give me pointers on how to fix it? Would simply copying the bash binary into user's home directory and modyfying the shell work? How would I deal with the dependencies, ldd shows quite a few of those :) Comments/suggestions will be appreciated. Thanks.

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  • X11Forwarding on MacOSX (Leopard/Snow Leopard)

    - by Shyam
    Hi, I have some remote boxes, which are a bunch of Mac Mini's. I access them now through SSH, and it fits my needs to do the maintenance. In the past, I used X11Forwarding with Linux boxes, when I was still using Debian myself, and I was able to run a specific application as if it was natively present (Firefox). I haven't succeeded to do this yet, but I assume because of the BSD underneath the fancy Apple GUI should be able to do such a task similar. I am aware of the remote administration, but I rather keep access limited to SSH on these boxes for inbound connections. Background information about the why's, tips, advice and comments are all helpful! Thanks!

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  • Advantage of using a smartfox server

    - by Fahim Akhter
    Hi, we are trying to outsource the server side of our game applicaton to someone. They recommend using http://www.smartfoxserver.com/ instead of our traditional php/mysql combination. Our game is in actionscript and will be using social aspects of facebook later on. Smartfoxserver is supposed to reduce the time of development. The thing I'm having a hard time getting right now is how? How does it reduce the time. We will still be making a RDMS writing stored procedures and game logic based server scripts. Where does smartfox come into play? Thanks, Fahim.

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  • CentOS PAM+LDAP login and host attribute

    - by pianisteg
    My system is CentOS 6.3, openldap is configured well, PAM authorization works fine. But after turning pam_check_host_attr to yes, all LDAP-auths fail with message "Access denied for this host". hostname on the server returns correct value, the same value is listed in user's profile. "pam_check_host_attr no" works fine and allows everyone with correct uid/password a piece of /var/log/secure: Sep 26 05:33:01 ldap sshd[1588]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=my-host user=my-username Sep 26 05:33:01 ldap sshd[1588]: Failed password for my-username from 77.AA.BB.CC port 58528 ssh2 Sep 26 05:33:01 ldap sshd[1589]: fatal: Access denied for user my-username by PAM account configuration Another two servers (CentOS 5.7 Debian) authorizes on this LDAP server correctly. Even with pam_check_host_attr yes! I didn't edit /etc/security/access.conf, it is empty, only default comments. I don't know what to do! How to fix this?

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  • What kind of server hardware is roughly necessary to serve website to 10k users?

    - by jcmoney
    I've been looking at VPS's and the specs they offer for entry level setups seems somewhat surprising to me. I'm am new to this topic but many of VPS offer less than 512MB of memory and my laptop has 4GB of memory so I am curious what does it actually take in terms of hardware to serve say 10k users (say 5k daily active users)? I figure a large number of factors can probably sway this a lot but just for benchmarking, say the site is a social networking site written in php using mysql + apache that's not really doing anything unusual like serving lots of media. So essentially a very basic Facebook minus the absurd number of photos and videos. What about 100k users (50k daily active)? 1 million (500k daily active)? Thanks in advance.

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  • Can't enable Windows XP file sharing

    - by colemanm
    The "sharing and security" option in the right-click context menu on a folder is no longer there. The File and Print sharing option is "installed" and turned on in the TCP/IP properties, but the ability to share any folders has disappeared, along with all previously shared folders. Where should I check to see what the issue is here? EDIT From comments below: "Server" service is not starting, see comment below for more... Firewall is completely disabled, too. This is XP Pro, Simple File Sharing is turned on. We've discovered that the "Server" Windows service is not starting on bootup for some reason. When attempting manual start, we get "error 2001: specified driver is invalid."

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  • Linux Development System Layout.Configuration

    - by tom smith
    Hi. Looking to create a linux based development/test system. I'm the only one using it. Will be using a variant of rhel/centos/fedora, with a 640G drive, and an external 250G as a kind of backup. Looking for thoughts/comments on the layout/config of the drive for the install/creation process. My primary goal is to be able to "backup"/restore the work product so i'd like OS to be separate from everything else. Thoughts/commnents/ponters appreciated. Thanks

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  • Weird internet connection behavior

    - by ShadowBroker
    I'm having a strange problem with my internet connection. At the moment my ISP is Fastweb (an italian provider) and i noticed that sometimes i can't load some sites, then all i have to do is wait 5 minutes and then i can load the site again. Some other times, instead, images won't load on certains sites (this always happens with 500px.com or Facebook rarely). I noticed that if i use VPN software like Privitize VPN or Spotflux everything works like a charm. Is something wrong with my internet configuration? Thank you.

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