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  • Can't get iptables firewall working correctly

    - by Jay
    I'm setting up a new Centos 5.6 system and can't get my iptables firewall to work correctly. it won't let me use SSH through it. I'm new to Centos but not to Linux or iptables. I've been removing things until I have isolated the problem. I set up the firewall with a default ACCEPT rule for the INPUT chain. I can connect through to the server fine. If I change the command to only allow traffic from the interface connecting to my trusted network it stops working. Working: iptables -A INPUT -s 0/0 -d 0/0 -j ACCEPT Failing: iptables -A INPUT -i eth0 -s 0/0 -d 0/0 -j ACCEPT I've double checked the ip address I'm using corresponds to eth0 using ifconfig. Any ideas where I went wrong?

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  • multi-thread in mmorpg server

    - by jean
    For MMORPG, there is a tick function to update every object's state in a map. The function was triggered by a timer in fixed interval. So each map's update can be dispatch to different thread. At other side, server handle player incoming package have its own threads also: I/O threads. Generally, the handler of the corresponding incoming package run in I/O threads. So there is a problem: thread synchronization. I have consider two methods: Synchronize with mutex. I/O thread lock a mutex before execute handler function and map thread lock same mutex before it execute map's update. Execute all handler functions in map's thread, I/O thread only queue the incoming handler and let map thread to pop the queue then call handler function. These two have a disadvantage: delay. For method 1, if the map's tick function is running, then all clients' request need to waiting the lock release. For method 2, if map's tick function is running, all clients' request need to waiting for next tick to be handle. Of course, there is another method: add lock to functions that use data which will be accessed both in I/O thread & map thread. But this is hard to maintain and easy to goes incorrect. It needs carefully check all variables whether or not accessed by both two kinds thread. My problem is: is there better way to do this? Notice that I said map is logic concept means no interactions can happen between two map except transport. I/O thread means thread in 3rd part network lib which used to handle client request.

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  • what is the purpose of the files in this directory: /var/lib/apt/lists?

    - by Magpie
    linux lubuntu HD4000 intel ivy-bridge 8gb 1600 ram. I am getting a duplicate entry error message from synaptic package manager and it says the problem is there. I am wondering a few things: What this directory is. Whether it safe to simply delete the offending duplicates from there. Whether this is a useful new discovery... Is this where all the packages I have no use for end up and something I can edit to suit my fancy in the long run? It would be nice to be able to reduce the clutter in my package manager. Especially find a way to get rid of all the 32 bit stuff or older versions of programs I have downloaded manually elsewhere. I had meant to post this in linux! So if this is wrong place let me know and I will move it there!

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  • Is there a way to get Postfix to both forward an e-mail *and* reject it via recipient_address_rejected

    - by Mac
    In postfix, I'd like a way to deal with e-mail accounts that are no longer active by having postfix send the standard "Recipient address rejected" type message, but still forwarding the e-mail to another user. Thus, if someone sends an e-mail to [email protected], it will bounce the message back to the sender for future reference, but the mail will still get forwarded to [email protected] to deal with. .vacation and / or .forward files let me down because they will either reply or forward, but not both. Any tips?

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  • Cisco 1760 T1 Setup

    - by Joseph
    My 1760 has a WIC1-T1 card in Slot 0 and the slot 0 "OK" light is lit. When the router boots it shows that it sees the T1 card. I would like to configure my T1. I received the following details from my ISP: * Removed IP's IP Version: IPv4 Router Interface: edge1.mia1 -- t1-2/1/0:2:13 -- Switch Port: Vlan: WAN Network: 4.59.?.?/30 Level3 Side: 4.59.?.? Customer Side: 4.59.?.? Cust. LAN IPs: 4.59.?.?/27 The problem is that it is not listed under interfaces. I am a noob with IOS, please let me know if you need more details. Thanks.

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  • Show image in cell based on cell value

    - by JoeM
    I am creating a weekly income comparison table. I want to compare A5 and A10 cells and display appropriate image in B7 cell. The image will be either UP or DOWN arrow (which reflects increase or decrease). I've created a formula which puts text up or down in the cell, but I don't know how to replace it with the up/down image. =IF(D77>D69, "up", IF(D77<D69, "down")) How can I do it? I know it's possible. Note: I am using Google Docs Excel, so please let me know if this cannot be done in it, but I have to use the real Excel installed on my laptop.

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  • LibGDX onTouch() method kill on touch

    - by johnny-b
    How can I add this on my application. i want to use the onTouch() method from the implementation of the InputProcessor to kill the enemies on screen. how do i do that? do i have to do anything to the enemy class? please help Thank you M @Override public boolean touchDown(int screenX, int screenY, int pointer, int button) { return false; } here is my enemy class public class Bullet extends Sprite { private Vector2 velocity; private float lifetime; public Bullet(float x, float y) { velocity = new Vector2(0, 0); } public void update(float delta) { float targetX = GameWorld.getBall().getX(); float targetY = GameWorld.getBall().getY(); float dx = targetX - getX(); float dy = targetY - getY(); float distToTarget = (float) Math.sqrt(dx * dx + dy * dy); velocity.x += dx * delta; velocity.y += dy * delta; } } i am rendering all graphics in a GameRender class and a gameworld class if you need more info please let me know Thank you

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  • Cannot "add to address book" in thunderbird on mac. Know a workaround?

    - by Arthur
    Runing TB 24.5.0 on Mac 10.8.5. I configure TB so that File-"Use Mac OS X Address Book" is not selected. Can open Address Book and see addresses in "COllected Addresses" & create New contact there. But in TB cannot "add to address book". I click on star to right of email address or ctrl-click correspondent and "add to address book". Nothing happens. But correspondent should be added to (some) address book. This is a major inconvenience because I use the address book to distinguish between junk mail from people who I do not know and good mail from people who I do know. Currently the only way for me to add anybody to the address book is to do so by hand, one at a time in "collected addresses". I welcome any work around that would let me add somebody to an address book with a single click. Thanks

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  • facebook keeps freezing Chrome and Windows

    - by missingfaktor
    Hi, everyone. I am a Windows 7 and Chrome user. Lately (since past few months) my Chrome has been freezing, taking down whole operating system with it, leaving resetting the computer the only choice. Recently I discovered that the issue was with facebook tabs, and when I close those tabs (if it's not too late!), I can save Chrome and Windows from a complete crash. This is very annoying. Is there a solution for this problem? Maybe uninstalling/reinstalling some plugins? Please help. Thanks. PS: Let me know if for helping me with this issue you need to know the list of extensions I have installed. I'll provide it in as an addendum.

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  • In Sublime Text 2, how can I indent out to a straight column with multiple cursors on a ragged edge?

    - by mtoast
    Suppose I've got multiple cursors along several lines, like this: foo| barr| foobar| baz| How can I automatically push the whitespace at the end of each line out to a flat edge, like this?: foo | barr | foobar | baz | (In these examples, | is supposed to be my cursor.) EDIT #1 When you just Tab or Space from the initial arrangement, you get this: # Useful, but not what I'm looking for foo | barr | foobar | baz | That's useful, but not what I'm looking for. I'm looking for some kind of keyboard shortcut that will let me indent from a ragged multi-cursor insert out to a straight column.

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  • When creating a GUI wizard, should all pages/tabs be of the same size? [closed]

    - by Job
    I understand that some libraries would force me to, but my question is general. If I have a set of buttons at the bottom: Back, Next, Cancel?, (other?), then should their location ever change? If the answer is no, then what do I do about pages with little content? Do I stretch things? Place them in the lone upper left corner? According to Steve Krug, it does not make sense to add anything to GUI that does not need to be there. I understand that there are different approaches to wizards - some have tabs, others do not. Some tabs are lined horizontally at the top; others - vertically on the left. Some do not show pages/tabs, and are simply sequences of dialogs. This is probably a must when the wizard is "non-linear", e.g. some earlier choices can result in branching. Either way the problem is the same - sacrifice on the consistency of the "big picture" (outline of the page/tab + location of buttons), or the consistency of details (some tabs might be somewhat packed; others having very little content). A third choice, I suppose is putting extra effort in the content in order to make sure that organizing the content such that it is more or less evenly distributed from page to page. However, this can be difficult to do (say, when the very first tab contains only a choice of three things, and then branches off from there; there are probably other examples), and hard to maintain this balance if any of the content changes later. Can you recommend a good approach? A link to a relevant good blog post or a chapter of a book is also welcome. Let me know if you have questions.

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  • One of my VMs went boom using Virtual Box and how it got fixed

    - by Enrique Lima
    I am running an HP Envy 15, 16GB and 500GB (7200 RPM) Hard drive. Had a VM configured from another environment, created the virtual machine config file on Virtual Box, everything seemed ok. Fired it up, and it was  s   l   o   w, it took close to 10 minutes for it to load, and about 5 more to see Windows was in the process of loading before the BSOD.  Thought, maybe, just maybe it will not happen again … oh was I wrong. Frustration had already hit an all time high with this configuration and the number of issues I’ve had. How I did the troubleshooting … The best thing to do (IMO) is to step back, and gather your tools to debug this situation. Tools:  Virtual Box command line tools, Windows Debug. Virtual Box comes with a pretty good set of tools to examine, migrate and overall tasks to deal with VMs. The firs step:  use VBoxManage to prevent the VM from rebooting after the error to get enough time to really dig into the BSOD issue. Command used:   VBoxManage setextradata VMNAME "VBoxInternal/PDM/HaltOnReset" 1 Once this was done, the error reported was an “Inaccessible boot device” coming from a “Stop – 7B” type of error on the BSOD. The issue I had with this, my VM was configured to use a virtual SATA controller, and thought Windows 2008 R2 would handle this fine … again wrong!  Because the integration tools from the other product where wanting to take effect that was throwing everything off. The fix The fix was almost handed to me, edited the configuration for the VM, removed the SATA controller from it, added the virtual hard drive under an IDE controller, boot up and voilà … it works! I was then able to install the Virtual Box guest tools and such, but have decided to favor “keep on working” over “let’s try SATA again”

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  • How do I restore a SQL Server database from last night's full backup and the active transaction log file?

    - by Dylan Beattie
    I have been told that it's good practise to keep your SQL Server data files and log files on physically separate disks, because it'll allow you to recover your data to the point of failure if the data drive fails. So... let's say that mydata.mdf is on drive D:, and my mydata_log.ldf is on drive E:, and it's 16:45, and drive D: has just died horribly. So - I have last night's full backup (mydata.bak). I have hourly transaction-log backups that will bring the data back up to 16:00... but that means I'll lose 45 minutes worth of updates. I still have mydata_log.ldf on the E: drive, which should contain EVERY transaction that was committed right up to the point where the drive failed. How do I go about recreating the database and restoring data from the backup file and the live transaction log, so I don't lose any updates? Is this possible?

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  • Is there an alternative to the term "calling object"?

    - by ybakos
    Let's suppose you've got a class defined (in pseudocode): class Puppy { // ... string sound = "Rawr!"; void bark() { print(sound); } } And say, given a Puppy instance, you call it's bark() method: Puppy p; p.bark(); Notice how bark() uses the member variable sound. In many contexts, I've seen folks describe sound as the member variable of the "calling object." My question is, what's a better term to use than "calling object?" To me, the object is not doing any calling. We know that member functions are in a way just functions with an implicit this or self parameter. I've come up with "receiving object," or "message recipient," which makes sense if you're down with the "messaging" paradigm. Do any of you happy hackers have a term that you like to use? I feel it should mean "the object upon which a method is called" and TOUWAMIC just doesn't cut it.

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  • Cant Add Columns to a AD Task pad except for the top level of the domain

    - by Darktux
    We are working on Active Directory taskpads application for user management in our organization and facing stange issue. When we create a taskpad, and when we are at top level of the domain, i can click view - Add/Remove Columns and add "Pre Windows Name" (and lots of other properties) to the taskpad as columns, but when i just go 1 level down , i can only see "Operating System" and "Service Pack" ; why is it happening , isnt "Domain Admins" supposed to god access to all the things in AD domain , atleast of objects they own? It is important to have "Pre Windows 2000" Name as a column begause with out that our "Shell Command" task wont show up in taskpads, since its bound to parameter "Col<9" (which is pre qindows name). Please do let me know if any additions questions to clarify my problem.

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  • How do I remove 1,000,000 directories?

    - by harper
    I found that in a directory more than 1,000,000 subdirectories has been created due to a bug. I want to remove all these directories, let's say in the directory WebsiteCache. My first approach was to use the command line tool: cd WebsiteCache rmdir /Q /S . This will remove all subdirectories except the directory WebsiteCache itself, since it is the current working directory. I noticed after two hours that the directoriws starting with A-H have been removed. Why does rmdir removes the directories in alphabetical order? It must take additional effort to do this ordered. What is the fastest way to delete such an amount of directories?

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  • Error installing Java on Ubuntu Server

    - by Camran
    I get this error almost when installation is finished: /proc is not mounted; some java apps may fail Could not create the Java virtual machine. Error occurred during initialization of VM Could not reserve enough space for object heap Ignoring error generating classes.jsa Why is this? I just entered sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts Is there something I must do first? What is Proc? If you need more input let me know. Thanks

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  • copy list of video file names to text file along with their runtime?

    - by Adam Johnston
    Copy list of file names to text file? I am linking the above page because of its relevance to my question. Is there anything similar that can be done to output a 'plain' looking text file (or xml or csv file) with basically the same data that the following cmd prompt produces: dir > c:\list.txt However only difference I need is the runtime of any and all video files included in the outputted file. Can this easily be done? Please let me know whether this can be done in the python terminal as well since I am familiar with that was well as Microsoft's dos prompt. Thank you so very much.

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  • Lubuntu fails plug and play such as scanners; default file location on Gnumeric

    - by Arkay
    I am new to Lubuntu and I have been giving it a good try but confess I am now tempted to go back to Windows. However, I am open to persuasion if I can get a simple answer to two questions. The first is a hardware question issue. It seems from the forum that many users like me cannot use plug and play hardware such as scanners. Are we doing anything wrong or does Lubuntu (mine is 13.04) not support plug and play or scanners? I have read lots of previous answers about scanners but they all seem to involve re-writing lines of instructions to various areas of the system - not something an amateur like me can do with ease. Mine is a Packard Belle Diamond 1200 plus and apparently it should work fine on Lubuntu - but can I even get it recognised, let alone working - No? Secondly is there an easy way in Gnumeric to set the default file location so that I don't have to trawl through my whole tree to locate a file I want to open? Thanks to anybody who can get me stay with Lubuntu with their wisdom.

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  • OpenVPN on port 53

    - by TossUser
    I have an openvpn server setup on UDP port 53 on a public IP. All the connecting clients gets pushed external DNS servers such as 8.8.8.8 and opendns. Sometimes the resolution stops working on the connected vpn clients and I get strange packets in the openvpn log. Now my question is why is that? When a VPN client, let's say 192.168.1.22 does a DNS query that query should go to 8.8.8.8:53 and then an UDP response packet should be sent back to 192.168.1.22 on a high UDP port. Any ideas? Thanks

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  • how to override ckeditor events [migrated]

    - by joe
    I am new to ckeditor, I have hard time figuring this issue out. due to my html design; if I try to use the link editor dialog while my ckeditor is maximized, it just doesn't show up, I understand that ckeditor is the top most object in my html page and the link dialog comes underneath it. if now I bring ckeditor to its normal state I will be able to see and use the link dialog. my idea is to slightly override the link button click event as follows: if the editor is in full screen mode, bring it back to the normal state. and keep a flag somewhere so that when I close the link dialog, I can decide whether to bring back the ckeditor to a maximized mode again. now this is easy logic except that I do not know how to override the click event of the link button and keep it work as expected. here's what I have: $().ready(function () { var editor = $('#txa').ckeditor(); CKEDITOR.plugins.registered['link']= { init : function( editor ) { var command = editor.addCommand( 'link', { modes : { wysiwyg:1, source:1 }, exec : function( editor ) { if(editor.commands.maximize.state == 1 ){ alert("maximized"); //....here bring back the editor to UN-maximized state and let the link button event click do the default behavior } else { alert("normal state"); } //2 is normal state //1 is maximized } } ); editor.ui.addButton( 'link',{label : 'YOUR LABEL',command : 'link'}); } } }); html part to make the exemple work: <div> <textarea id="txa"> </textarea> </div> TO BE SHORT: http://jsfiddle.net/Q43QP/ if the editor is maximized, bring it to normal state then show the link dialog.

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  • Best way to setup hosts, subdomains, and IPs [closed]

    - by LynnOwens
    I own a domain, let's call it mydomain.com. I need to host the following off it: forums.mydomain.com www.mydomain.com blog.mydomain.com objects.mydomain.com I believe I can get 5 static IPs. I plan on assigning one each to those four hosts. Then I need to adhoc create names, all below objects.mydomain.com. For instance: one.objects.mydomain.com two.objects.mydomain.com three.objects.mydomain.com I need to create these names programatically, and without human intervention. Preferably, they would not get their own IPs. They would use the IP of objects.mydomain.com. First question: Does this mean that I need to host my own DNS? Second question: I'm using Apache as a web server. What does the virtual host configuration look like? I was experimenting with the following to understand how routing on domain names works and I always ended up at www. <VirtualHost *:80> ServerAdmin [email protected] ServerName www.mydomain.com ServerAlias www.mydomain.com DocumentRoot "E:/Static/www" RewriteEngine On RewriteRule ^(/www/.*) /www$1 </Virtualhost> <VirtualHost *:80> ServerAdmin [email protected] ServerName forums.mydomain.com ServerAlias forums.mydomain.com DocumentRoot "E:/Static/forums" RewriteEngine On RewriteRule ^(/forums/.*) /forums$1 </Virtualhost>

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  • ADF Logging In Deployed Apps

    - by Duncan Mills
    Harking back to my series on using the ADF logger and the related  ADF Insider Video, I've had a couple of queries this week about using the logger from Enterprise Manager (EM). I've alluded in those previous materials to how EM can be used but it's evident that folks need a little help.  So in this article, I'll quickly look at how you can switch logging on from the EM console for an application and how you can view the output.  Before we start I'm assuming that you have EM up and running, in my case I have a small test install of Fusion Middleware Patchset 5 with an ADF application deployed to a managed server. Step 1 - Select your Application In the EM navigator select the app you're interested in: At this point you can actually bring up the context ( right mouse click) menu to jump to the logging, but let's do it another way.  Step 2 - Open the Application Deployment Menu At the top of the screen, underneath the application name, you'll find a drop down menu which will take you to the options to view log messages and configure logging, thus: Step 3 - Set your Logging Levels  Just like the log configuration within JDeveloper, we can set up transient or permanent (not recommended!) loggers here. In this case I've filtered the class list down to just oracle.demo, and set the log level to config. You can now go away and do stuff in the app to generate log entries. Step 4 - View the Output  Again from the Application Deployment menu we can jump to the log viewer screen and, as I have here, start to filter down the logging output to the stuff you're interested in.  In this case I've filtered by module name. You'll notice here that you can again look at related log messages. Importantly, you'll also see the name of the log file that holds this message, so it you'd rather analyse the log in more detail offline, through the ODL log analyser in JDeveloper, then you can see which log to download.

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  • How can I edit unuusal clipboard content? [on hold]

    - by Peter Jaric
    I'd like to edit application specific clipboard content, with an application specific format. There are clipboard managers that let me edit the plain text content, but I'd like to access clipboard content that application use for internal cut and paste. An example would be when you copy something from a web page in Firefox. When you look at the different formats in a clipboard viewer, there are three or so formats starting with "moz", with content that is not plain text. I'd like to edit that content before pasting it back into Firefox. Can this be done?

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  • Network connection via USB

    - by Fco
    Can I get my Nexus One/Android on my local network over USB instead of WiFi and browse to my computer's IP address, the one to which the phone would be connected to, via USB? For instance, let's say my computer has an IP address 100.1.1.1 and when I go to it from the computer I would go to my localhost and see a website I've set up locally in the computer. Then, I connect my phone to that computer via USB. Can I then go to 100.1.1.1 from the browser and see the same website? All this through the USB, no WiFi?

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