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• Lightweight monitoring for a Windows XP laptop

  - by kazanaki

  Hello I have a windows XP laptop in a remote location. I would like to have an overview for CPU/Memory statistics from a remote location. Monitoring a specific service (a Tomcat instance) would be nice but not essential. I have seen the monitoring solutions (Nagios, cacti e.t.c) and they are all very heavy. I do not want to install mysql, web server and other stuff like that on the laptop. I don't even need a web solution at all. It could just be a simple command line app with a server port and on my machine another GUI application would connect there (and not a web browser) Is there something like this available?

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• How to convert a mpeg4-aac video to mpeg-ts using MEncoder?

  - by Mahendra Liya

  Hello, I know this can be done using FFMpeg and I have done it. The only problem here was that FFMpeg actually tries to "encode" the file while converting to mpeg-ts which I don't want. i.e. I just want to change the container format to mpeg-ts without encoding the media. Is this type of conversion possible with FFMpeg? (I know about "copy" option, but it works with H264-aac and not with mpeg4-aac). Is it possible to change mpeg4-aac to mpeg-ts container format with MEncoder? I wish to know the personal opinion/advice of those who have already worked on such stuff. Thanks in advance.

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• DNS protocol message example

  - by virtual-lab

  hello there, I am trying to figure out how to send out DNS messages from an application socket adapter to a DNSBL. I spent the last two days understanding the basics, including experimenting with WireShark to catch an example of message exchanged. Now I would like to query the DNS without using dig or host command (I'm using Ubuntu); how can I perform this action at low level, without the help of these tools in wrapping the request in a proper DNS message format? How the message should be post it? Hex or String? Thanks in advance for any help. Regards Alessandro Ilardo

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• Tunneling HTTP traffic from a particular host/port

  - by knoopx

  Hello, I'm trying to figure out how to access from my development machine (Devel) to a third party web service (www.domain.com) which I am not allowed to directly contact using my office IP address. Here's a basic diagram (i'm not allowed to post images...): http://yuml.me/diagram/scruffy/class/%5BDevel%5D-%5BA%5D,%20%5BA%5D-%5BB%5D,%20%5BB%5D-%5Bwww.domain.com%5D The only machine allowed to access that service is B (production server) but I do neither can directly access it from my development machine (Devel). So in order to access the web service I have to ssh into A, and then from A to B to access www.domain.com Is there any way of tunneling traffic from B to A and then back to my development machine so I can directly access www.domain.com without having to ssh into every box? Devel: My development machine. A, B: Linux servers. I own root access on both. B: Production server www.domain.com: Third party HTTP API production server uses.

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• Launching php script through comman line - keeping terminal window open after execution

  - by somethis

  Oh, my girlfriend really likes it when I launch php scripts! There's something special about them, she says ... Thus, I coded this script to run throught the CLI (Command Line Interface) - so it's running locally, not on a web server. It launches just fine through right click open run in terminal but closes right after execution. **Is there a way to keep the terminal window open? Of course I can launch it through a terminal window - which would stay open - but I'm looking for a one click action. With bash scripts I use $SHELL but that didn't work (see code below). So far, the only thing I came up with is sleep(10); which gives me 10 seconds for my girl to check the output. I'd rather close the terminal window manually, though. #!/usr/bin/php -q <?php echo "Hello World \n"; # wait before closing terminal window sleep(10); # the following line doesn't work $SHELL; ?> (PHP 5.4.6-1ubuntu1.2 (cli) (built: Mar 11 2013 14:57:54) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies )

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• webmail suite recommendation

  - by hoball

  Hello, I have serveral emails in a few domains (email@domain1, email@domain2, email@domain3). Currently they are on an owned email server and I am collecting emails via IMAP protocol (i would not like to use POP..) in Thunderbird. I have a few partners and I want to allow them to access the same email address. Here is what I desired: All users can open All the inboxes via IMAP @ Thunderbird (with proper configuration) at the same time, there are a webmail system, every user can login their account (userA, userB, userC), and they will see all inboxes (email@domain1, email@domain2, email@domain3) Would you recommend any suite that fits my needs? Either (a system to be installed on my server) or (a remote service where I need to config MX records) will do. Thank you.

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• Java Applet Tower Defence Game needs tweeking

  - by Ephiras

  Hello :) i have made a tower defence Game for my computer science class as one of my major projects, but have encountered some rather fatal roadblocks. here they are creating a menu screen (class Menu) that can set the total number of enimies, the max number of towers, starting money and the map. i tried creating a constructor in my Main class that sets all the values to whatever the Menu class passes in. I want the Menu screen to close after a difficulty has been selected and the main class to begin. Another problem i would really like some help with is instead of having to write entire arrays i would like to create a small segment of code that runs through an entire picture and sets up an array based on that pixels color.this way i can have multiple levels just dragged into a level folder and have the program read through them. users can even create their own. so a 1 if its yellow, a two if blue and a 3 if purple, then everything else = 0; you can download all the classes and code uif you'd like here sorry about having to redirect you but i wasn't sure how to efficently add a code spoiler. help is greatly appreciated

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• how to delete protected files in ntfs?

  - by Balchev

  Hello, I want to delete old windows directory from my system drive (C) , but I am unable to due NTFS perms.I tried from Win 7 and Win 2003, but can't do it. I tried safe mode as well with same result. I there any way to work around this (other then formating the drive)? Perhaps changing the owner or something? It errors at files like "oldwin/bfsvc.exe". Is there some "superuser" in windows similar to linux root account? Thanks

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• simple script to backup PostgreSQL database

  - by Mick

  Hello I write simple batch script to backup postgeSQL databases, but I find one strange problem whether the pg_dump command can specify a password? There is batch script: REM script to backup PostgresSQL databases @ECHO off FOR /f "tokens=1-4 delims=/ " %%i IN ("%date%") DO ( SET dow=%%i SET month=%%j SET day=%%k SET year=%%l ) SET datestr=%month%_%day%_%year% SET db1=opennms SET db2=postgres SET db3=sr_preproduction REM SET db4=sr_production ECHO datestr is %datestr% SET BACKUP_FILE1=D:\%db1%_%datestr%.sql SET FIlLENAME1=%db1%_%datestr%.sql SET BACKUP_FILE2=D:\%db2%_%datestr%.sql SET FIlLENAME2=%db2%_%datestr%.sql SET BACKUP_FILE3=D:\%db3%_%datestr%.sql SET FIlLENAME3=%db3%_%datestr%.sql SET BACKUP_FILE4=D:\%db14%_%datestr%.sql SET FIlLENAME4=%db4%_%datestr%.sql ECHO Backup file name is %FIlLENAME1% , %FIlLENAME2% , %FIlLENAME3% , %FIlLENAME4% ECHO off pg_dump -U postgres -h localhost -p 5432 %db1% > %BACKUP_FILE1% pg_dump -U postgres -h localhost -p 5432 %db2% > %BACKUP_FILE2% pg_dump -U postgres -h localhost -p 5432 %db3% > %BACKUP_FILE3% REM pg_dump -U postgres -h localhost -p 5432 %db4% > %BACKUP_FILE4% ECHO DONE ! Please give me advice Regards Mick

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• How to make an ISO copy of Linux-filesystem and user files of VPS Debian based?

  - by moogeek

  Hello! I have a Debian-Based VPS on some hosting. I want to migrate from it and i need to make a full copy of all Linux-filesystem (and installed packages) + all home directory with website files. And then pack/convert it to ISO image so that to use it on cloud hostings like Amazon. The problem is that i have only ssh root access. Hosting support can't do that for me. Another part of the question - is it possible to enlarge the Linux-filesystem by not re-installing it and using the free space of home directory? Is it possible to do? I guess it is possible with rsync or something like that. Will my Mysql databes copy together with all other data? Thanks in advance!

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• How to make an ISO copy of Linux-filesystem and user files of VPS Debian based?

  - by moogeek

  Hello! I have a Debian-Based VPS on some hosting. I want to migrate from it and i need to make a full copy of all Linux-filesystem (and installed packages) + all home directory with website files. And then pack/convert it to ISO image so that to use it on cloud hostings like Amazon. The problem is that i have only ssh root access. Hosting support can't do that for me. Another part of the question - is it possible to enlarge the Linux-filesystem by not re-installing it and using the free space of home directory? Is it possible to do? I guess it is possible with rsync or something like that. Will my Mysql databes copy together with all other data? Thanks in advance!

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• Help with Apache rewriteengine rules

  - by Vinay

  Hello - I am trying to write a simple rewrite rule using the rewriteengine in apache. I want to redirect all traffic destined to a website unless the traffic originates from a specific IP address and the URI contains two specific strings. RewriteEngine On RewriteLog /var/log/apache2/rewrite_kudithipudi.log RewriteLogLevel 1 RewriteCond %{REMOTE_ADDR} ^199\.27\.130\.105 RewriteCond %{REQUEST_URI} !/StringOne [NC, OR] RewriteCond %{REQUEST_URI} !/StringTwo [NC] RewriteRule ^/(.*) http://www.google.com [R=302,L] I put these statements in my virtual host configuration. But the rewriteengine seems to be redirect all requests, whether they match the condition or not. Am I missing something? Thank you. Vinay.

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• nginx not acknowledging passenger_root option

  - by lowgain

  I'm running a sinatra app on passenger, and trying to hook it to nginx. The relevant part of my config looks like: http { passenger_root /path/to/gem; #this is a valid path passenger_ruby /path/to/ruby; #ditto #etc... server { listen 80; server_name hello.org; root /path/to/stuff/public; passenger_enabled on; } } Whenever I start nginx however, I get: Starting nginx: [alert]: Phusion Passenger is disabled becasue the 'passenger_root' option is not set. Please set this option if you want to enable Phusion Passenger. What am I missing here? Thanks!

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• vim: how do I keep 10 lines visible when scrolling up to EOF with CRTL-F ???

  - by Gaston

  Hello! I am used to use vi, not vim. What I find annoying in vim is that when you are scrolling with CTRL-F and reach EOF, vim scrolls down to the very last line and put this line on the top of your screen, and you can't see the lines above. You must scroll up a little bit so you can see the context. All this happens with CTRL-F only, not with j or the down cursor key. In vi, you scroll down (with CTRL-F), but when you reach EOF it still show you, say, 15 lines and then the tippical ~. I am using Putty for remote access. How can I config vim to behave like vi in this case? Hope you understand the question. Thank you! Gaston.

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• Custom Windows AMI for Amazon EC2

  - by cutyMiffy

  Hello: I am new to the Amazon EC2 services and I am planning to host a Windows based vm on Amazon. I have lot of fuzziness about AMIs on Amazon. So my first question would be, am I be able to install softwares and frameworks(e.g. Silverlight, .NET, etc) on a existing Windows instance that I select? And if not, how can I create a custom AMI so that I can install these softwares that I need before I submit it to Amamzon and launch? Thanks a lot for your help :) Deeply appriciated

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• netcat as a multithread server

  - by etuardu

  Hello, I use netcat to run a simple server like this: while true; do nc -l -p 2468 -e ./my_exe; done This way, anyone is able to connect to my host on port 2468 and talk with "my_exe". Unfortunately, if someone else wants to connect during an open session, it would get a "Connection refused" error, because netcat is no longer in listening until the next "while" loop. Is there a way to make netcat behave like a multithread server, i.e. always in listening for incoming connections? If not, are there some workarounds for this? Thank you all!

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• Any ideas about how to make Programming Techniques Class more interesting.

  - by Eedoh

  Hello. I already found similar question here on SO, but almost all the answers were more philosophical, then practical. I'd like You to share some of Your PRACTICAL ideas about how to make my course more interesting. It doesn't matter how much effort it takes from me. I even thought about trying to motivate them to pick some topic in the beginning of the course and to work on it as some kind of real, small, startup project that they could maybe financially exploit once it's finished. But I'm afraid that most of them will not get the project to the end, and that it could be boring to them working on one thing all year long. Also I thought about involving them in Torcs, but I'm afraid most of them wouldn't be up to the task. Btw, Torcs is Car Racing Simulation, but there's an API for developers so they can develop their own AI for the driver, and then race their cars against the other programmer's AI's. I'm not asking here for problem examples, as I asked a separate question about that. I need ideas about making my lectures more interesting and fun.

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• Web Hosting Checklist

  - by Chris

  Hello, I am a web developer that is starting to look into hosting his own website. I would like to showcase my programming skills (PHP, MySQl, C#, Wordpress). My knowledge of languages I am OK with but the actually hosting site is where my knowledge starts to get a little shaky. I know the basics (bandwidth, sub-domains, re-write rules) but I would love your input, to help me formulate a check list of certain web-hosting services that I should be on the look-out for. Also I was wondering if there were any reliable hosting providers who give you the option to host both c# code-behinds and PHP code. As I would like to have two versions of my site, one in C# and one in PHP the hope is that if I need to look for another job this website will help me show possible employers my server side knowledge. I hope this is enough info, I did some researching online but found a bunch of unless articles and I've always have had luck on the StackExchange sites. So hopefully you, can help me. Thanks alot.

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• Servicing a WIM image with the recently released SP1 for Windows 7/Server 2008 R2

  - by noonand

  Hello, I normally hang out over on SO but wanted to ask this question in a more appropriate forum. I have, for the sheer fun of learning how to do (as I'm sick of GHOST and dd images) set up WDS and captured a reference WIM file. One of the things that I remember being promised was the ability to do offline servicing of WIM files. I'm just wondering what the actual procedure is for this? I have the full SP1 ISO down (covers 7 and 2008R2) and was wondering about next steps. If someone could point me in the right direction I'd appreciate it greatly. Thanks - Derek

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• Secure Server Distro

  - by Drama

  Hello, I have a root-server (i7/24GB/1TB) running Ubuntu 10.04 LTS as my OS. After some security audits (OpenVAS, Retina etc) I see that Ubuntu isn't the most secure system for a semi-corporate environment. Its updated from many sources, ofc from the Ubuntu security repo too. But nevertheless I could exploit my OpenSSL install with an exploit from August/September. There are some critical updates needed which Ubuntu does not provide. I was using Debian and Ubuntu for almost 5 years but now I doubt. What distro is secure and up to date from your point of view? How can I make the server more secure? Outsourcing of every software-module to a VM? I am not new to server-hardening, my packages are up to date I read Ubuntu Security Notices and I have no unneeded services installed on my server. Thanks.

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• New entries on the GRUB

  - by Kiewic

  Hello. I updated my Ubuntu, and after that there were two new lines on my GRUB screen. Ubuntu 9.04, kernel 2.6.28-16-generic Ubuntu 9.04, kernel 2.6.28-16-generic (recovery mode) Ubuntu 9.04, kernel 2.6.28-11-generic Ubuntu 9.04, kernel 2.6.28-11-generic (recovey mode) Ubuntu 9.04, memtest86+ Other operating systems: Microsoft Windows XP Home Edition Do I have two kernels installed? Do the old entries are still useful? Each kernel takes up space? :P And that's not all, when a get into the old version of Ubuntu, the wireless card stops working on any Ubuntu version until I get into Windows and then go back to Ubuntu. Thanks for your help.

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• download/export emails from webmail

  - by misterjinx

  hello, I'm just switching my hosts and I want to move the emails from my accounts too. In order to have my current emails on the new host I want to download/export them and to import at the other host. In order to do this I use one of the webmail (squirrelmail, roundcube, horde) clients available on my current host. The problem is that except for roundcube, I don't see any download/export option available. And in roundcube I can only select one email at a time and download it as eml. My question is how do I export/download all the emails from one account and import them at the new host? I know this is possible because I remember doing this some time ago using squirrelmail, but I can't find anything related to this now. Thank you.

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• How to use sshd_config - PermitUserEnvironment option

  - by laks

  I have client1 and client2 both are linux machines. From client1: client1$ssh root@client2 "env" it displays list of ssh variables from client2. Things I did on client2: I want to add new variable to client2 . So I edited sshd_config to PermitUserEnvironment yes and created a file environment under ssh with following entry Hi=Hello then restart sshd /etc/init.d/sshd Now from client1 trying the same command client1$ssh root@client2 "env" didn't provide the new variable "Hi". ref: http://www.raphink.info/2008/09/forcing-environment-in-ssh.html http://www.netexpertise.eu/en/ssh/environment-variables-and-ssh.html/comment-page-1#comment-1703

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• How to test DNS glue record?

  - by Sunnz

  Hello I have just set up a DNS server for my domain example.org with 2 name servers ns1.example.org and ns2.example.org. I have attempted to set up a glue record for ns1 and ns2 at my registrar. It seems to work for now when I do a dig example.org but when I do a whois example.org it lists ns1.example.org and ns2.example.org but not their IP address which should be set up as a glue record. So I am wondering how do I check for the existence of a glue record? Do I do it with whois? I have seen .com and .net whois records that have both the domain name as well as the IP address for the name servers, is .org different? What's the proper way to test this? Thanks.

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• How to list manually installed software packages in Ubuntu?

  - by Ivan Petrushev

  Hello, I'm using apt-get install to install various software on my PC. I have a handful of PCs that needs the same software packages installed all over them. How can I get list of software installed via apt-get install and the sequence in what the packages are installed. Okay, the sequence is not so important since the package manager resolves dependencies... I want to create a script that once run installs all needed software on the other PCs. All of these PCs are Ubuntu default installations. It is obvious that the packages list must not include all the packages that are installed trough a default installation :) Also that list should not contain software installed via synaptic or dpkg if possible.

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