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  • Run a service after networking is ready on Ubuntu?

    - by TK Kocheran
    I'm trying to start a service that depends on networking being started, whenever the computer is rebooted. I have a few questions: Is this easily possible from an /etc/init.d script? I have tried creating a script here (conforming to the standards), but I'm really doubtful that it's even running on boot, let alone working. When I test it manually, it works. I've seen the new Upstart service, but as far as how that actually works, I'm completely in the dark. How can I make a script that runs on boot which runs after networking has been started? If I could run it after connected to wireless network, even better :)

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  • Is "If a method is re-used without changes, put the method in a base class, else create an interface" a good rule-of-thumb?

    - by exizt
    A colleague of mine came up with a rule-of-thumb for choosing between creating a base class or an interface. He says: Imagine every new method that you are about to implement. For each of them, consider this: will this method be implemented by more than one class in exactly this form, without any change? If the answer is "yes", create a base class. In every other situation, create an interface. For example: Consider the classes cat and dog, which extend the class mammal and have a single method pet(). We then add the class alligator, which doesn't extend anything and has a single method slither(). Now, we want to add an eat() method to all of them. If the implementation of eat() method will be exactly the same for cat, dog and alligator, we should create a base class (let's say, animal), which implements this method. However, if it's implementation in alligator differs in the slightest way, we should create an IEat interface and make mammal and alligator implement it. He insists that this method covers all cases, but it seems like over-simplification to me. Is it worth following this rule-of-thumb?

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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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  • Something is spamming from my hMail server - how can I deal with this?

    - by joshcomley
    My Windows 2008 server is attempting to send out a lot of spam, I've just discovered, and I'm not sure how to see where the compromise is. For example: has someone hacked an account? Has someone hacked the server? Is there a virus on the server? What can I do to investigate this? Edit Thanks for the replies so far. I am running hMail server, and have spent so long investigating the correct configuration but still I end up with these emails being sent. Here is a screenshot of my Internet IP range settings on the server: (let me know what else I can provide to help)

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  • Did you know documentation is built-in to usp_ssiscatalog?

    - by jamiet
    I am still working apace on updates to my open source project SSISReportingPack, specifically I am working on improvements to usp_ssiscatalog which is a stored procedure that eases the querying and exploration of the data in the SSIS Catalog. In this blog post I want to share a titbit of information about usp_ssiscatalog, that all the actions that you can take when you execute usp_ssiscatalog are documented within the stored procedure itself. For example if you simply execute EXEC usp_ssiscatalog @action='exec' in SSMS then switch over to the messages tab you will see some information about the action: OK, that’s kinda cool. But what if you only want to see the documentation and don’t actually want any action to take place. Well you can do that too using the @show_docs_only parameter like so: EXEC dbo.usp_ssiscatalog @a='exec',@show_docs_only=1; That will only show the documentation. Wanna read all of the documentation? That’s simply: EXEC dbo.usp_ssiscatalog @a='exec',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='execs',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='configure',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_created',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_running',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_canceled',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_failed',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_pending',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_ended_unexpectedly',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_succeeded',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_stopping',@show_docs_only=1; EXEC dbo.usp_ssiscatalog @a='exec_completed',@show_docs_only=1; I hope that comes in useful for you sometime. Have fun exploring the documentation on usp_ssiscatalog. If you think the documentation can be improved please do let me know. @jamiet

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  • What's is the point of PImpl pattern while we can use interface for same purpose in C++?

    - by ZijingWu
    I see a lot of source code which using PIMPL idiom in C++. I assume Its purposes are hidden the private data/type/implementation, so it can resolve dependence, and then reduce compile time and header include issue. But interface class in C++ also have this capability, it can also used to hidden data/type and implementation. And to hidden let the caller just see the interface when create object, we can add an factory method in it declaration in interface header. The comparison is: Cost: The interface way cost is lower, because you doesn't even need to repeat the public wrapper function implementation void Bar::doWork() { return m_impl->doWork(); }, you just need to define the signature in the interface. Well understand: The interface technology is more well understand by every C++ developer. Performance: Interface way performance not worse than PIMPL idiom, both an extra memory access. I assume the performance is same. Following is the pseudocode code to illustrate my question: // Forward declaration can help you avoid include BarImpl header, and those included in BarImpl header. class BarImpl; class Bar { public: // public functions void doWork(); private: // You doesn't need to compile Bar.cpp after change the implementation in BarImpl.cpp BarImpl* m_impl; }; The same purpose can be implement using interface: // Bar.h class IBar { public: virtual ~IBar(){} // public functions virtual void doWork() = 0; }; // to only expose the interface instead of class name to caller IBar* createObject(); So what's the point of PIMPL?

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  • I want to host my own multiple Websites on my server. How do i setup my own child nameserver?

    - by basilmir
    I host my own multiple Websites on my server. How do i setup my own child nameserver? There are 4 different websites, with .com and .net and .ro at the end. I moved them to my own server. My Domain Administration (Registrar) let's me define my own child nameserver with my own IP and i've added my nameserver as my domain nameservers list. ns.something.ro as the first and only in the nameservers list ns.something.ro with my own IP address as the child nameserver I've setup everything and it works (kind of). When i use my ns IP adress directly i can of course access everything. Using "normal" external dnses will not work. As expected others on the web can't resolve correctly. What's wrong? Am i missing something?

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  • Context Sensitive JTable (Part 2)

    - by Geertjan
    Now, having completed part 1, let's add a popup menu to the JTable. However, the menu item in the popup menu should invoke the same Action as invoked from the toolbar button created yesterday. Add this to the constructor created yesterday: Collection<? extends Action> stockActions =         Lookups.forPath("Actions/Stock").lookupAll(Action.class); for (Action action : stockActions) {     popupMenu.add(new JMenuItem(action)); } MouseListener popupListener = new PopupListener(); // Add the listener to the JTable: table.addMouseListener(popupListener); // Add the listener specifically to the header: table.getTableHeader().addMouseListener(popupListener); And here's the standard popup enablement code: private JPopupMenu popupMenu = new JPopupMenu(); class PopupListener extends MouseAdapter { @Override public void mousePressed(MouseEvent e) { showPopup(e); } @Override public void mouseReleased(MouseEvent e) { showPopup(e); } private void showPopup(MouseEvent e) { if (e.isPopupTrigger()) { popupMenu.show(e.getComponent(), e.getX(), e.getY()); } } }

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  • Just installed Ubuntu 12.04. When booting, all I get is a black screen with cursor

    - by user66378
    Installation appears to go fine. After rebooting, I get my motherboard loading screens, but when it comes time for Ubuntu to boot, I just get a black screen with a blinking white underscore in the top-left - same as I got when waiting for the install CD to load, except it lasts forever. The only keypress it seems to recognize is ctrl+alt+del, which reboots. Letters don't register, function keys w/ or w/o modifiers do nothing. I've installed Ubuntu 12.04 twice and got the same error. The first time, I installed it as the only OS, and had it take up the whole disk. The second time, I installed Windows 7 first, then Ubuntu by specifying custom partitions. After this install, it would boot straight to Windows without showing grub. I used EasyBCD to add the Ubuntu installation to grub, and this got grub to show, and let me select it, but it led back to the same error described up top. I've had Linux Mint 11 and 12 installed on this PC, but was unable to get previous versions of Ubuntu to install (always had errors while installing, not after). Hardware: Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) LGA 1155 ASUS SABERTOOTH P67 (REV 3.0) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard EVGA 01G-P3-1371-TR GeForce GTX 460 (Fermi) CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Western Digital RE4 WD5003ABYX 500GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive

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  • How can I have two web roots on one server, so I can point two domains to two different roots?

    - by Daniel F. Dietzel
    I usually ask my n00b questions on Stack Exchange, but now I'm setting up a VPS and have a question. My usual site.com points to my VPS's IP xxx.xxx.xxx.xxx. Now I have a different domain, and I'd like to point that to another location, say xxx.xxx.xxx.xxx/myname. However, when I try to add that as an "A" record in the DNS settings it won't let me. FYI I'm using chicagovps.net with ubuntu 11.10 and Nginx. Thanks!

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  • New power supply, now computer doesn't recognise hard drive?

    - by Mike
    Ok, I bought a new power supply, because my old one was too damn loud. I hooked it up to my PC, turned it on, everything is looking fine, start up detects my DVD drive, 2 hard disks.. then I get the message "BOOT FAILURE INSERT SYSTEM DISK". Now I've seen some other people talk about going into BIOS and changing the start up to the HDD and not the CD.. well I've done that and it doesn't help. If I let windows load up and it asks me to which partition I wish to install windows, no partition is present. It's as if after the initial start up the drives arn't being found. I plugged my old (but loud) PSU back in, connected up all the cables, and it works perfectly. Why does the new PSU not detect my HDD's after the first BIOS screen start up? Any ideas? :)

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  • What antivirus software supports updates without an internet connection?

    - by Michael Gundlach
    I'm putting antivirus software on Windows 7 computers in the middle of Africa. The computers don't have internet access, but still need to be protected against viruses from CDs and thumbdrives. Separate from these computers is one computer that does have extremely spotty internet access. What's the best AV software for this situation? The important part, as I see it, is that we need to keep the computers up to date, but can't let the AV software suck down updates at its leisure: the computers are disconnected, and getting emails onto the connected computer is a challenge enough. We thought we might transfer update files to the connected computer using a protocol that can handle repeated connection drops (e.g. FTP with resume.) Then we'd manually apply the update files to the disconnected computers. Does any AV software support this? Is there a better solution?

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  • Run script when Varnish starts

    - by kipusoep
    I'd like to run a script when Varnish starts. This script should execute a webrequest to a webserver (its backend), which then makes sure Varnish's cache gets filled with all pages residing on this webserver. So this script makes sure everyting is in Varnish's cache when Varnish (re)starts, because we're using Varnish as cache and fail-over (the webserver should be able to be down for let's say a week for example, without any consequences). What are the possibilities to do this? We can't just edit /etc/init.d/varnish and /usr/sbin/varnishd because they can het overwritten when updating varnish? Thanks!

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  • Flash drive shows in My Computer but can't be accessed.

    - by Mr_Chimp
    I have a flash drive. When I plug it into my (Dell, Windows XP) computer it appears in My Computer as an empty drive - not a disk with no files on, a drive with no disk in! Double-clicking drive J: gives the message "Please insert a disk into drive J" (I get the same if I type in "J:" to the address bar, too...) Someone suggested going to properties and entering a name but it won't let me type in this box. I've looked in the disk manager and again it appears as an empty drive. I'm thinking that it might be fried...Can anyone give me any advice on how to either fix it or tell for sure that it's gone?

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  • Hosting company that does Linux VPS and MS SQL

    - by danielmcq
    I'm looking for hosted solutions but there are so many companies that finding the right one using a Google search is a bit overwhelming. Ideally I would like a hosting company which has following options: -Linux VPSs - Individual VPSs should be fairly cheap since I plan on putting one or two services per VPS i.e web server on one (httpd and ColdFusion), an SVN server on another, etc. -Managed MS SQL databases - My company already has data in MS SQL databases and a lot of ColdFusion code written that has MS SQL specific commands in it. -Individually purchased dedicated IP addresses -Preferably located in the North America region My plan would be to setup one Linux VPS as a gateway/firewall/VPN server and have all of my traffic routed through so that my other servers would not use of bandwidth by talking to each other. The trick is also finding a company that does Linux VPS AND MS SQL databases. Does anybody know of any hosting companies offer what I'm looking for? Let me know if I need to add more details.

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  • Thunderbird "Folders" and "Inbox" font size

    - by bo gusman
    Graphical programs are such a pain sometimes. I am of an age where 1024x768 is the highest resolution that I can see. I had set my Windows 7 system fonts to be 125% - that helps a lot - but it screws up the tool bars on many other programs so I've reverted to 100% and it's now too hard to read in many cases. Most browsers will let you easily scale text font size as will the "message" window of Thunderbird (aside from setting the default font size for reading messages to 24 point, CTRL + + works wonders). However, I cannot seem to find a way to set the font size for the other panes - the Folders pane and the inbox pane. Is there some undocumented way to do that?

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  • New and Improved Search Helpers Now Procurement Assistants!

    - by LuciaC
    Check out the new and improved Procurement Assistants (formerly Search Helpers). Let us guide you simply to Issue Resolution.  To access all our Procurement Search Helpers see Doc ID 1391694.2 our Procurement Information Center. Here you will see links to our Procurement Search Helpers: Assistants provide a collection of solutions based on the symptoms you enter. For example simply choose the radial button that pertains to your issue, as shown here: Then choose the additional symptom(s) that pertain and potential solution documents will be returned as shown here: Try these before logging a Service Request. Current Procurement Assistants: Doc ID Title 1361856.1     Assistant: Oracle Purchasing - Purchase Order and Requisition Approval (Search Helper) 1377764.1    Assistant: Oracle Purchasing PO Output for Communication / Supplier Notification Issues (Search Helper) 1364360.1    Assistant: Oracle Purchasing Requisition To Purchase Order (Search Helper) 1369663.1    Assistant: Oracle Purchasing Purchase Document Open Interface and API (Search Helper) 1391970.1    Assistant: Oracle Inventory Management RVTII-060 Errors in Receiving (Search Helper) 1394392.1    Assistant: Oracle Purchasing Buyer Work Center Search Helper (Search Helper) 1470034.1    Assistant: Oracle Purchasing - Document Control : Cancel and Close

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  • Alias one set of Subdomains to another

    - by Schneems
    I have to domains that I want to effectively mirror one another on select subdomains. Let's say they are pirates.com and ninjas.com and i want ninjas to mirror the content on pirates. When I visit foo.ninjas.com I want to see the content on foo.pirates.com. Due to app restrictions I need to do this in DNS for an undefined number of subdomains. I was under the impression i could do this with a CNAME, but it appears that setting a CNAME for * subdomain of the ninjas.com domain to point to pirates.com will make any subdomain of ninjas.com point at pirates.com instead of the associated subdomain. I.e. foo.ninjas.com would reference pirates.com instead of foo.pirates.com. Is there a way to do this using DNS? Am I missing something basic?

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  • Scale an image with unscalable parts

    - by Uko
    Brief description of problem: imagine having some vector picture(s) and text annotations on the sides outside of the picture(s). Now the task is to scale the whole composition while preserving the aspect ratio in order to fit some view-port. The tricky part is that the text is not scalable only the picture(s). The distance between text and the image is still relative to the whole image, but the text size is always a constant. Example: let's assume that our total composition is two times larger than a view-port. Then we can just scale it by 1/2. But because the text parts are a fixed font size, they will become larger than we expect and won't fit in the view-port. One option I can think of is an iterative process where we repeatedly scale our composition until the delta between it and the view-port satisfies some precision. But this algorithm is quite costly as it involves working with the graphics and the image may be composed of a lot of components which will lead to a lot of matrix computations. What's more, this solution seems to be hard to debug, extend, etc. Are there any other approaches to solving this scaling problem?

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  • using sed to replace two patterns within a larger pattern

    - by Hair of the Dog
    Using sed how could I replace two patterns within a larger pattern on a single line? Given a single line of text I want to find a pattern (Let's call this the outer pattern) and then within that outer pattern replace two inner patterns. Here's a one line example of the input text: Z:\source\private\main\developer\foo\setenv.sh(25): export 'FONTCONFIG_PATH'="$WINE_SHARED_SUPPORT/X11/etc/fonts" In the example above the outer pattern is "/^.*([[:digit:]]+):/" which should equal "Z:\source\private\main\developer\foo\setenv.sh(25):" The two inner patterns are "/^[A-Za-z]:/" and "/\/". Another way to phrase my question is: Using sed I know how to perform replacements of a pattern using the "s" command, but how do I limit the range of "s" command so it only works on the portion of the input string up to the "(25):"? The ultimate result I am trying to get is the line of text is transformed into this: /enlistments/source/private/main/developer/foo/setenv.sh(25): export 'FONTCONFIG_PATH'="$WINE_SHARED_SUPPORT/X11/etc/fonts"

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  • How setup federated SQL data to display limited information to a Web server in the DMZ?

    - by Pcav
    I have a SQL server behind a firewall. I need to push some limited SQL 2005 information to a Web Server in the DMZ so that I do not have to let database queries come all the way into the database server on our internal network. I want to push a small amount of dynamic data to a Web server in the DMZ and lock it down so that our hosted website does not need to come into the internal network for information; I want to put a server in the DMZ that will be the only connection allowed to the SQL database. This DMZ server will be the only server that can have any sort of connection to the back-end database so the hosting provider just pull the data from our server in the DMZ...

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  • Do I need to Sysprep Windows 7

    - by Cell-o
    Let's say I have one image and I want to put same image on many identical lenovo laptop's. These new machines have site licence (Office 2010, Windows 7). My questions : 1 - What software do you recommended for this project? e.g Acronis True Image , Clonezilla ,MDT 2 - How do I take the image? after Win 7 and Office 2010 activate process or before ? I'm very confused. e.g : many website saying "you must sysprep when deploying Windows 7 machine." is that correct? if this is correct why?

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  • Mac OS X: easiest (free, non-QuickTime Pro) application for converting numbered folder of images to movie

    - by Jared Updike
    I'd like to convert a folder of PNGs into a quicktime .mov with PNG compression (it's a folder of fractals in an animation; PNG compression works great here and the losslessness is important). What programs will do this with minimal fuss? (I don't have or want to pay for a full license of QuickTime Pro.) UPDATE: Let me make this more clear: minimal fuss means: I download some EncoderMagic.app (for example), I double click it to launch it. I select the folder with my numbered images, and out pops my movie. No mess. No resizing. ... Perhaps this doesn't exist (or is called QuickTime Pro?)

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  • Tips for Making this Code Testable [migrated]

    - by Jesse Bunch
    So I'm writing an abstraction layer that wraps a telephony RESTful service for sending text messages and making phone calls. I should build this in such a way that the low-level provider, in this case Twilio, can be easily swapped without having to re-code the higher level interactions. I'm using a package that is pre-built for Twilio and so I'm thinking that I need to create a wrapper interface to standardize the interaction between the Twilio service package and my application. Let us pretend that I cannot modify this pre-built package. Here is what I have so far (in PHP): <?php namespace Telephony; class Provider_Twilio implements Provider_Interface { public function send_sms(Provider_Request_SMS $request) { if (!$request->is_valid()) throw new Provider_Exception_InvalidRequest(); $sms = \Twilio\Twilio::request('SmsMessage'); $response = $sms->create(array( 'To' => $request->to, 'From' => $request->from, 'Body' => $request->body )); if ($this->_did_request_fail($response)) { throw new Provider_Exception_RequestFailed($response->message); } $response = new Provider_Response_SMS(TRUE); return $response; } private function _did_request_fail($api_response) { return isset($api_response->status); } } So the idea is that I can write another file like this for any other telephony service provided that it implements Provider_Interface making them swappable. Here are my questions: First off, do you think this is a good design? How could it be improved? Second, I'm having a hard time testing this because I need to mock out the Twilio package so that I'm not actually depending on Twilio's API for my tests to pass or fail. Do you see any strategy for mocking this out? Thanks in advance for any advice!

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  • It's the ethernet 10/100 in LAN transfer faster than USB 1.0?

    - by dag729
    I have an old laptop (PIII 800MHz, with 256 RAM) that I wish to use as my home server: it'll have to serve just two people, so I think that I'll be more than ok as for the RAM and the CPU. The issue is about data, because the internal hard disk is a 12GB, that is...ridicolous! I have more than 60GB of mixed storage and counting (images, videos and music) in an external usb hd. I could put the hd in my desktop pc just to serve the big files through ethernet or let it inside its usb box attached to the laptop. The question is: which of these solutions will be the fastest? USB 1.0 attached to the server (laptop) or internal hard disk serving files via 10/100 ethernet to the laptop on demand?

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