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• Converting PDF eBooks into a Kindle format

  - by Ender

  Over the past couple of years I've amassed quite a collection of guides, tutorials and ebooks in PDF format. A lot of these are quite useful for work, especially PDF documentation, and rather than have to be at a computer every time I want to read how to do something in Sitecore or to read through a software testing ebook I'd like to do it on my brand-spanking-new Kindle. However, even though there is now a native PDF reader on the Kindle due to the nature of PDF's they are practically unreadable. The text doesn't wrap due to how PDF's are sized and so far after a bunch of Google searches I've yet to find a viable solution to get my PDF's converted into a readable Kindle format. Sometimes these books have code or pictures/tables in them, but most of the time they're text-heavy and to be honest I'd be surprised if there wasn't a free tool to handle the converting of PDF to one of the (seemingly many) Kindle formats. So, can anyone help me out with this?

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• Large file copy from NFS to local disk performance drop

  - by Bernhard

  I'm trying to copy a 200GB file from an NFS mount to a local disk. The local disk is an XFS filesystem on a LVM on top of a RAID 5 system (hardware RAID controler). I'm using rsync to monitor the transfer speed. At the beginning the IO speed is about 200MB/s, stable for the first 18GB. But then the performance drops by a factor of 10-20 and never recovers to the initial rate. Sometimes it reaches about 50-100MB/s but just for a few seconds and then the process seems to hang for a bit. At the same time all file-stat operations on the target filesystem are blocking for a long time (minutes). Also interrupting the copy process blocks for several minutes, a sub-sequent delete of the partly copied file takes also several minutes. Any ideas what could be causing this?

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• CentOS: safe to yum reinstall after removing 32-bit packages?

  - by virtualeyes

  as per the CentOS FAQ on removing 32-bit packages present in a 64-bit install, is it safe to perform the last step: You may also want to do this: yum reinstall \* The reason is that sometimes the /usr/share/ items (shared between BOTH packages) get removed when removing the 32-bit RPM packages. on an existing installation? (i.e. where data & settings of possibly affected applications need to be preserved) rpm -Va shows a number of entries like: /sbin/ethtool: at least one of file's dependencies has changed since prelinking S.?..... /sbin/ethtool /usr/libexec/mysqld: at least one of file's dependencies has changed since prelinking S.?..... /usr/libexec/mysqld along with /usr/share entries with T flag (apparently filetime diff, seems safe) The machine is up & running fine, but may not be whenever a reboot occurs. Clue-in as to the real state of the machine (hosed or OK) appreciated Thanks

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• VMware - Watching multiple virtual machine screens

  - by mr.b

  Hi, I don't know even if I put the question right, but here's what I'd like to accomplish. I have avoided specifying exact Vmware virtualization product here because I'm not sure which one would be most suitable for the task at hand. I am developing an application that works in local network. This application has to run on several computers at the same time, and it's important to me, as a developer and tester, to see (literally) how it behaves at all times on all computers. Is there any way to connect to screens of virtual machines deployed on ESX, ESXi, Sever 2.0, or some other product, so that I can see something like grid of screens, say 4x4 or 6x4 or whatever number of scaled screens, at the same time? Ability to interact with screens directly from grid (by double-clicking a screen, for instance, and then getting full resolution screen) would be greatly appreciated, of course. I hope that someone understood what I meant here. :)

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• Can't access dfs namespace over vpn

  - by cpf

  Hi Serverfault, I've recently configured 2 servers in AD on the same domain level. They are physically separated and permanently connected through a site-to-site vpn for dfs replication. All well, but when users connect to either site through vpn (from home e.g.) they can't use the domain level method: \\domain.com\data Internally this works perfectly, resolving domain.com when connected through vpn gets the correct IP. I've tried Google to figure things out. What I was able to find was that more people have this issue, no real solution found though. Can anyone explain why this is happening? Especially a solution would be really helpful! Thanks in advance.

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• Eventlog entry for allowed connection in Windows Firewall

  - by Jaap

  I was seeing a lot of entries in the eventlog: The Windows Filtering Platform has permitted a connection. Application Information: Process ID: 4 Application Name: System Network Information: Direction: Inbound Source Address: 10.xxx.xxx.xxx Source Port: 80 Destination Address: 10.xxx.xxx.xxx Destination Port: 31773 Protocol: 6 Filter Information: Filter Run-Time ID: 67903 Layer Name: Receive/Accept Layer Run-Time ID: 44 We have a loadbalancer which checks every second to see if the application is still running (a health check). The logs contain large amounts of this kind of entries, which makes the Event Viewer slow and it's difficult to find the more interesting logs. How do I make sure these messages don't end up in the event logs?

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• How to disable a McAfee service?

  - by AngryHacker

  I am trying to disable a McAfee Real-Time Protection service, but if I go into Services/Properties, then try to set it to Manual or Disable - it says that unable to open service McShield for writing on Local Computer. Error 5. Access is denied. I've tried logging in as an Admin, to no avail. I've tried resetting permissions in the registry to the key where the McAfee service is described...nothing helped. Logging in with Safe Mode did not help either. How can I disable this service? Is there a way to disable a service before even getting into Windows? P.S. Uninstalling McAfee is not an option.

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• Serving Compressed Files Amazon vs Lightty

  - by tike

  We are currently using amazon CloudFront to serve css and according to Amazon itself, Amazon CloudFront can serve both compressed and uncompressed files from an origin server. But while i check compression it shows everything fine in origin server but it shows notcompressed checking in the link with cloudfront. e.g. http://www.port80software.com/tools/compresscheck.asp?url=http%3A%2F%2Fimgsrv.mydomain.com%2Fen-UK%2Fsomething.css it would result with Compression status: (gzip) while with cloudfront http://www.port80software.com/tools/compresscheck.asp?url=http%3A%2F%2hereisit.cloudfront.net%2F%2Fsomething.css Compression status: Uncompressed Origin server is running lighttpd with mod_deflate however, allowed config is: deflate.allowed_encodings = ("bzip2", "gzip", "deflate") [i would think, putting extra allowed encoding wont affect as such.] Here i am clueless, what is the real issue.

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• How do you debug why Windows is slow?

  - by aaron

  I've got Vista Biz and when my machine chugs I think it is because of paging, but I never know how to verify this. Procexp doesn't seem to provide useful information because it appears that nothing is going on when the chugs happen. perfmon seems like it has the counters I need, but I'm never sure what counters I should add to cover the information I want. For perfmon, I prefer numbers that are percents, so I can gauge load. Here are the counters I have up, but they don't always seem to correlate to chugs: - % disk time (logical) - page faults/sec (an indicator of lots of paging activity) - processor/%priviliged time

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• Reporting available RDP sessions

  - by Sergei

  Hi All Default Windows 2003 Server has two RDP sessions available.If all of them are taken by someone else you will only be notified about it after providing your credentials. This seems like a waste of time especially in our environment where we share a lot of development server. Could a message be given as soon as you open the connection window if the connections are taken up? We can use qwinsta based script to check sessions before logon but it's still takes time. Is there a feature to do what I am asking for?

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• MediaTemple Django Bad Gateway

  - by Eeyore

  I have a site running on GS server on MediaTemple. It's Django/PostgreSQL setup. For some reason from time to time I get Bad Gateway error and I can't figure out what's causing it. What can cause this error? What else can I do to find the cause of the problem? url.access-deny = ( "~", ".inc" ) fastcgi.server = ( "/main.fcgi" => ( "main" => ( "socket" => "/var/tmp/" + appname + ".sock", # don't change this "check-local" => "disable", ) ) ) alias.url = ( "/media/" => "/home/xxx/data/python/django/django/contrib/admin/media/", "/static/" => "/home/xxx/containers/django/site/static/", ) url.rewrite-once = ( "^(/media.*)$" => "$1", "^(/static.*)$" => "$1", "^/favicon\.ico$" => "/media/favicon.ico", "^(/.*)$" => "/main.fcgi$1", ) server.error-handler-404 = "/main.fcgi"

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• Using Folder Redirection GPO and Offline Files and Folders

  - by user132844

  I want to use Folder Redirection to redirect user's My Documents to a network share. First question is: What is best practices for mapping the drive? Should I use the profile tab in AD with the %username% variable, or a net use logon script, or something else? Second question is: How do I deal with laptops and syncing the network with the local storage? I want to have 2-way syncing so if they manually map their networked home drive and edit it from a different computer, it will sync the newer version to their My Documents folder the next time they connect their normal work computer. I also want to be sure that if they edit a file offline on their laptop while away from the office, that the network version syncs the changes the next time they connect that laptop. Please advise best practices for this scenario in a 2008 R2/Win7 environment. I am also interested in Mac clients for this environment, and while I am very Mac savvy, I would like to hear what others consider to be best practices for Mac network homedirs in a Win environment.

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• Background process text appears in terminal vim

  - by Jezen Thomas

  First time poster, long time lurker, searched, couldn’t find etc, etc. I’m running vim in tmux, in iTerm2. I’m running a server with Grunt.js, which I have running in the background, out of my way. I start my grunt server in the background like this: grunt server & Grunt also watches a bunch of files, and runs some tasks when any of the watched files have been written to. The problem is, when I am in vim and I write a file, the output from grunt starts rendering in vim! Here are some screenshots to illustrate the problem: Before writing the file: And after writing the file: What have I tried? I’ve tried running a ‘stock’ vim by starting with this: vim -u NONE …But the problem remains. This suggests to me that the problem is not with my .vimrc. Perhaps it’s an issue with iTerm2, I don’t know. Help.

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• LGA 1155 or LGA 2011? Which has a brighter future?

  - by Langdon

  I'd basically like to rehash this question, only 22 months later. The last system I built was in 2006, shortly after AMD came out with socket AM2. I was able to upgrade the processor on it 3 times and would love to do the same with my next computer. Since AMD seems to be lagging, I'm going for Intel this time. I've read that Intel changes chip sets all the time, so there's no safe bet. I also read (1 comment on 1 forum) that said LGA 2011 will have 8-core support, but LGA 1155 won't, which leads me to believe that LGA 2011 might be a better choice. Anyone have any good advice for me?

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• How to close all background processes in unix?

  - by Gabi Purcaru

  I have something like: cd project && python manage.py runserver & cd utilities && ./coffee_auto_compiler.py And I want both of them to close on Ctrl-C (or some other command). How can I accomplish that? EDIT: I tried using jobs -x kill and kill `jobs -p `, but it doesn't seem to kill what I need. Here is what I mean: moon 8119 0.0 0.0 7556 3008 pts/0 S 13:17 0:00 /bin/bash moon 8120 6.8 0.4 24568 18928 pts/0 S 13:17 0:00 python manage.py runserver jobs -p give me just process 8119, but I also need to close 8120, since it's the thing that the first command opened. If it helps, the commands are actually in a Makefile, and I want it to run two daemons at the same time (and somehow close them at the same time). And yes, I'm using ubuntu, with bash

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• How to delete empty folders from a given directory in windows with a script

  - by Nicola Peluchetti

  I'm using r.js as a build tool but as of today that tools doesn't give me the ability to delete empty folders in the build dir. I've found these two scripts for /f "usebackq" %%d in ("dir /ad/b/s | sort /R") do rd "%%d" for /f "delims=" %%i in ('dir /s /b /ad ^| sort /r') do rd "%%i">NUL looking around the net but i always get %%i was unexpected at this time. or %%d was unexpected at this time. And i wouldn't know how to tell the script where my directory is. My build script is @echo off where /q r.js || ( echo requirejs node package is not installed. You must install node, npm and then run npm install -g requirejs goto :eof ) node r.js -o app.build.js :end I need to tell the script to remove all empty directories which are located inside ../../js

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• Laptop overheating within minutes of start up

  - by Spik330

  I have a Dell Windows 7 Home Prem with an I7-720QM. More information on the computer can be found here http://www.dell.com/support/home/us/en/04/product-support/servicetag/51CVCN1/configuration The Problem I am having is the computer will over heat unnaturally fast. From the time it takes from boot to when i can run my diagnostic tools which takes about two minutes the cpu temp is 86c after a few more minutes the cpu temp will reach 100 and the computer will black screen shut down. In total the the laptop can only be run for 3-5 minutes before completely shutting off. During this time there is nothing extensive running. After the laptop shuts down you have to wait for it to cool down or it will shut off even faster sometimes 7-15 seconds well still in the boot screen. Does anyone know what could be the problem maybe a sensor or is the computer fried?

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• Queue'ing cron jobs up to 10 times

  - by webnoob

  Hi All, This kind of touches on another post I made but is different so I have posted it as a new question. I have a script that runs that may take just over 1 minute to process, and my cron is set to run every minute. I can stop another cron job executing the script if the first one hasn't finished by using flock (php) in the file, however, this means that I would lose one iteration of the routine and have to wait nearly a minute before it is triggered again (as my understanding leads me to believe). What I would like to do is if the script is locked, not bomb out, but wait. Over time however, this could get quite high so I would also like to limit the amount of queued cron's to 10. I am a real newbie with Linux (had a Linux VPS for 3 days now) so I am not sure if my solution is even practical. Thanks.

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• How must I deal with anti-virus software on Windows 7

  - by Heather

  I know this question is looking like an easy question or not a question at all but it's not really easy question. I'm not related to security and anti-viruses and just don't trust every provided anti-virus. So first question is a real question - Is it OK (safe) to not use anti-virus at all. I know how to use firewall, usually I use only trusted connections and surfing trusted sites. My chances to get virus is really low. Even I've got a bit outdated PC and don't want to pay the performance for it. I can do monthly scans without having one installed - is it OK to be safe ? If not can you recommend a good free antivirus solution?

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• Linux servers vs Windows IIS sense of usage "free" solutions

  - by Rob

  I wonder what is the sense of using "free" open source solutions for serious webstie applications? Crawled and read many testing of servers performance and there is one conclusion: IIS seems to be the best choice for high load applicatiom. I mean cost effective. Especially this concers to Nginx PLUS and LiteSpeed Users where subscriptions paid for e.g. LoadBalacer and extra support cost a lot in fact. I'm asking then where it's "free" then or "cheap" in this case? Assuming even little higher cost of dedicated servers with Windows still seems like Windows looks cheaper. At it's basic setup Windows 2012 with IIS offer much more than std LAMP, or other NGINX config.... Maybe am I missing sth ? I mean only general case for someone who did not already started his app. I know exactly that the cheapest solution is the one someone is skilled. Has anyone done already such real costs calculation for example scenarios?

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• how can i realize a video-wall on 3-9pc with vlc

  - by Luca

  hello! i have to create a videowall, from 3 to 9 monitor. every monitor as a pc. actually, i stream from a server 9 movies with different istances of VLC, but i could also play on every machine the relative video with a single player. there's no problem. the real problem is that i really dont know how to sync the videos on a LAN...unfortunately there is a NETSYNC module inside VLC wich is NOT working. here are some info about my setup: videowall from 3 to 9 monitor || from 3 to 9 pc, all with the same configuration || a gigabit router+switch for the "dedicated" LAN im really stuck in this situation, if anyone has an idea or just a completely different solution, please, share it with me! thanks a lot in advance! :)

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• Running Android emulator inside a Virtualbox Vm

  - by sgargan

  I'm trying to setup a VM with a complete android development stack (SDK, Platforms, Eclipse etc) for a Hackathon. I'm having real trouble getting the emulator to start in the VM. I realize that the emulator is essentially a VM itself inside the Vbox VM and so is going to be slow, but it just hangs at the Android splash screen and never gets any further. Might there be something going on with the VM that is causing it to run so very slowly? Is there anything I can do to give the VM more CPU? I've tried setting the execution cap to 100% but it didn't help any. Anyone know what might be going on here, or have any ideas about how I might speed it up? Thanks Steve.

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• UDP multicast streaming of media content over WIFI

  - by sajad

  I am using vlc to stream media content over wireless network in scenario like this (from content streamer to stream receiver client): The bandwidth of wireless network is 54 Mb/s and UDP stream's required bandwidth is only 4 Mb/s; however there is trouble in receiving media stream and quality of playing specifically in multicast mode; means I can play the stream but it has jitter and does not play smoothly. In uni-cast I can stream up to 5 media streams correctly, but in multicast mode there is problem with streaming just one media! However when I stream from client some multicast streams; the wifi access-point can receive data correctly and I can see the video in "udp streamer" side correctly even when number of multicast streams increases to 9; But as you see I want to stream from streaming server and receive media in client size. Is this a typical problem of streaming real-time contents over wireless networks? Is it necessary to change configurations of my WIFI switch or it is just a software trouble? thank you

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• Concerns about a Dedicated (Windows Server 2008) + DDoS

  - by TheKillerDev

  I am have today a dedicated server with these specs: Intel Core i5 750, 2x120GB (ssd + raid), Windows Server 2008 Web, 200Mbps Network, 24 Gb DD3 And I would like to know what are the best thing I can do to prevent a DDoS Attack, since I know this will be a real threat by the importance of the files that will be archived in it. Today I have apache listening port 80 and RDC listening port 3389. But the security is beeing made only by Windows Firewall. So, any thoughts on what would be good to prevent from DDoS attacks?

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• What is the right way to use Internet Sharing in OS X?

  - by Bob King

  For a while now I've been using the Wireless in my Mac Mini as a seperate WiFi access point because my main router doesn't quite cover my whole house. There is a dedicated CAT 5E line down to the Mini, which has a static IP address. I've turned Internet Sharing on, using Airport/WiFi but it seems my options for security are limited. Can I do WPA2? Also, it seems like my iPhone only connects 25% of the time, and the rest of the time it claims I've given a bad password. I've tried "Forget this network" repeatedly.

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