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• How can I change a specific website's style?

  - by Darthfett

  I have a specific website I often use (specifically, http://www.pygame.org/), which has an awful color scheme. I would like to change the color scheme of the site, but I haven't been able to find a good tool for the job. Some basic requirements: It should not be universal to all websites, or affect other websites. I want this to be semi-automatic. I don't want to have to re-define the theme for each page of the site. I want to continue to access the site online (I don't want a local copy of the entire site) Not OS-specific (browser-specific is okay) I am currently using Firefox, but I am also happy with Chrome. There may be some limitations on what is able to be done automatically, as the CSS seems to be embedded in the HTML (and some also in the HTML tags). I would like to remove as much of the green as possible. Is there an existing extension/add-on that does this?

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• Why ping another inet machine from MacBook get netgate's ip address?

  - by Xinwang

  I have three machine in my home network connected by a wireless router. One is server installed linux at 192.168.1.1, another is Thinkpad with MS Windows XP at 192.168.1.2, last one is MacBook Pro with Mac OS X 10.6.3 at 192.168.1.3. When I ping the Linux Server from Thinkpad (MS Windows XP) I can get the correct ip address, but when I ping it from Mac I get the global address of my router, like 61.135.181.175. Could you tell me why this happen? And how do I get same ping result on Mac and Windows. Thanks

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• What are the practical limits on file extension name lengths?

  - by GorillaSandwich

  I started using DOS back before Windows, and ever since have taken it for granted that Every file has a file extension, like .txt, .jpg, etc That extension is always short (usually 3 letters) I learned early that the extension is basically just a hint to the OS as to what the content type is. Eventually I got exposed to Mac and Linux, files with no extensions, etc. And of course I've seen shorter extensions, like .rb and .py. I just noticed that markdown-formatted files can have the extension .markdown, and it made me wonder - how long can that extension be? If I make it .mycrazylongextensiontypewoohoo, will certain operating systems or programs choke on the file? Are extension names generally short just for convenience, or is this based on some limitation, legacy or current?

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• How to restore one contact from Address Book with Time Machine

  - by doekman

  I want to restore one contact from my Address Book with Time Machine. To do so, I select the contact in Address Book. Then, I press the Time Machine icon in the dock. Then my address book is "taken into space". However, when I browse back in time (either pressing the arrow back, or selecting a time on the right), the contact details do not change. And I am sure the data has been changed between dates. Also, when I do press restore, it's still the new data, not the backup. Is this a bug, or am I doing something wrong? I'm using OS X 10.6.3 in combination with a external USB drive on an iMac.

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• LVM, Soft RAID1, and Replication?

  - by mtkoan

  Hi all, I am practicing putting together a HA file server. It is a linux server with 2 1.5TB Hard drives. My plan is to use LVM to manage the physical volumes into logical volumes for /, /home, and /var. Then use md (soft RAID 1) to mirror the image onto the second HDD, THEN use DRDB to mirror the entire setup another server. Is this overkill? Would I just be okay with just md and DRDB? The system will serve user's homedirs (~100) and probably some groupware or other local intranet. On my own machines I've always separated root and /home partitions in case I break something, I can easily reinstall the OS. Should I follow that same theory here? If so I need LVM, because I really can't predict where we'll need more space, /var or /home.

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• Challenging Job after Graduate Studies

  - by sriram

  I worked with an M.N.C developing web applications in Java/J2EE related technologies(includes JSF,struts,hibernate etc.) now I quit my job to pursue Graduate Studies in the U.S.A. So I am a student in the middle of my Graduate studies. I had enough of developing mere CRUD applications in J2EE now I want to work in something exciting. The problem is I can't say what exactly but I can give you an examples. Say developing new JDK libraries or writing a kernel for some O.S. or something like that. So I have five questions here. Is it true that people in R & D often use C++ because of higher performance in that case should I consider switching my platform to C/C++? How should I use my time I have one year to graduate to prepare myself for Jobs Interviews for such positions? (e.g. Reading books on Algorithms etc.) How do I know about these jobs and how do I apply to those Jobs? Is it the right time for me to think about Jobs? Am I over ambitious because I am not in a Ivy League, just a normal school? (My GPA is not so high unfortunately).

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• High frequency, kernel bypass vs tuning kernels?

  - by Keith

  I often hear tales about High Frequency shops using network cards which do kernel bypass. However, I also often hear about them using operating systems where they "tune" the kernel. If they are bypassing the kernel, do they need to tune the kernel? Is it a case of they do both because whilst the network packets will bypass the kernel due to the card, there is still all the other stuff going on which tuning the kernel would help? So in other words, they use both approaches, one is just to speed up network activity and the other makes the OS generally more responsive/faster? I ask because a friend of mine who works within this industry once said they don't really bother with kernel tuning anymore-because they use kernel bypass network cards? This didn't make too much sense as I thought you would always want a faster kernel for all the CPU-offloaded calculations.

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• What would be a good topic for research on "edge of multiple processors / computers programming" topic?

  - by Kabumbus

  This is a subjective discussion so we can express our dreams and hopes here. A "topic" must be like a task with point to have as end result a software poduct. A "topic" must be mainly about "Software engineering", "Algorithm and data structure concepts" and perhaps "Design patterns". I mean let us try to look what is not already there? What can be developed in fiew month and give a breakthrue / start a new leap / show somethig not realized before in science of f multiple computers programming? What i see is already there: LAN / wire and other infrastractural programms for connecting on device level MPI/ Bit torrent/Jabber protocols / APIs / servers for messaging on top Boost and analogs on evry OS in most languages for multithreading there are lots of CUDA like on computer frameworks for fast calculating on computers GPUs What I personally do not see out there is a crossplatform framework for multiple processes interaction. Meaning one that would allow easy creation of multyple processes running in paralell inside one hoster app on one machine. In level not harder than needed for threads creation (so no seprate server apps - just one lib doing it all) Is there ny such lib and what can you propose for research topic?

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• PC boots on then off & 30 sec. later on again, it wiil shut off on itself mostly in idle or just unexpecticly

  - by Jody

  This problem started w/ my sons desktop, it would just shut off after a bit of work or stay on for a long time & to get it to unfreeze is to cold boot it, i put a new HDD in & I still have the same issue, RAM is good power supply fan is moving quite as well as all the rest of the fans it has stayed fairly dust free, i'm at a loss ,I have defaulted all the factory settings changed battery & ungraded to a new OS. I still have the same problem. the power light stays on after it has shut down & when upon starting it goes straight to safe mode option page, I start in last good config. reboots again takes 30 sec. to boot & will work again for a while, the only other thing I haven't tried was a graphic card replace, i'm onboard video now & have been.

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• Program can't start because dll is missing

  - by Kruug

  Any executable that I attempt to run on this laptop pops up an error stating The program can't start because LPK.dll is missing from your computer. Try reinstalling the program to fix this problem. I have tried doing regsvr32 lpk.dll from within system32, but that returns the error The module "lpk.dll" was loaded but the entry-point DLLRegisterServer was not found. Make sure that "lpk.dll" is a valid DLL or OCX file and then try again. I was able to copy the DLL file from a working computer, but I get the same issue. How would I go about registering this DLL? Or, alternatively, which program would I have to reinstall to get the DLL to work again? The system is Windows 7 Professional 64-bit with Service Pack 1. I would really like not to reinstall the OS, but at this point, I'm about ready to.

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• Why is CS never a topic of conversation of the layman? [closed]

  - by hydroparadise

  Granted, every profession has it's technicalities. If you are an MD, you better know the anatomy of the human body, and if you are astronomer, you better know your calculus. Yet, you don't have to know these more advance topics to know that smoking might give you lung cancer because of carcinogens or the moon revolves around the earth because of gravity (thank you Discovery Channel). There's sort of a common knowledge (at least in more developed countries) of these more advanced topics. With that said, why are things like recursive descent parsing, BNF, or Turing machines hardly ever mentioned outsided 3000 or 4000 level classes in a university setting or between colleagues? Even back in my days before college in my pursuit of knowledge on how computers work, these very important topics (IMHO) never seem to get the light of day. Many different sources and sites go into "What is a processor?" or "What is RAM?", or "What is an OS?". You might get lucky and discover something about programming languages and how they play a role in how applications are created, but nothing about the tools for creating the language itself. To extend this idea, Dennis Ritchie died shortly after Steve Jobs, yet Dennis Ritchie got very little press compared to Steve Jobs. So, the heart of my question: Does the public in general not care to hear about computer science topics that make the technology in their lives work, or does the computer science community not lend itself to the general public to close the knowledge gap? Am I wrong to think the general public has the same thirst for knowledge on how things work as I do? Please consider the question carefully before answering or vote closing please.

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• What does "Windows is not a real-time operating system" mean?

  - by hydroparadise

  I came across an application called LatencyMon, that apparently does latency monitoring. I have always understood the more of a load you put on the processor, the less responsive, or more latent, the system becomes. However, in the second section of the LatencyMon page, the first sentence says, "Windows is not a real-time operating system". That got me thinking. I mean, is this any different from any other operatiing system like linux, unix, or OS X? Are there any "Real-Time" operating systems? Or is the merely a marketing scheme to get you to buy their product? EDIT: Also, are there any examples of RTOS's out there?

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• Why am I getting 'undefined method' exceptions when executing 'run_list add', 'run_list remove' and 'rackspace server delete'?

  - by Peter Groves

  [Originally posted this to opscode forum, got no response] I’m testing out a free hosted chef-server account and multiple subcommands are failing with ‘Unexpected Errors’. Perhaps my version and the server version are incompatible? OS: Ubuntu 12.04LTS Local Chef: 10.12.0 (Installed through gem) Local Ruby: 1.8.7 Also, the workstation machine has been manually configured, but the client(s) I’ve been experimenting with are launched with the Rackspace plugin (using ‘knife rackspace server create…’) The problem commands seem to fail when talking to the host chef-server, however, before it ever tries to modify the client, so I don’t believe that’s where the problem exists. The virtual-servers that are launched by ‘knife rackspace server create’ are launched properly but then deleting them with knife fails. If I include a recipe in the run_list when I create the server, the recipe is properly added to the run_list. If I try to add it later or remove the one that there server was initialized with, those commands fail. Here is the output of a few relevant commands (with stacktraces): https://gist.github.com/7100ada3fd6690113697

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• Why do some software not get load balanced even when there are multiple cores?

  - by Nav

  While VTune Analyzer was running on a blade server with 8 cores, I observed the cpu useage percentage using mpstat -P ALL 1. mpstat showed me that VTune was taking up 100% of a single core, while all other cores were idle. Why does that happen? Shouldn't the OS (RHEL Server 5.2) automatically distribute load across cores? The same happened when I tried running MATLAB (even after enabling multithreading support in the MATLAB settings). p.s: I'm a developer. Not a sys admin. So felt it better to ask here rather than at serverfault.

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• Dedicated server: managed hosting or manage it myself?

  - by ddawber

  We're currently hosting a number of sites on a self-managed dedicated server. Some companies, however, offer a managed dedicated server hosting service. They offer: Roughly the same server spec Ticketing system support Managed daily backups Virtual firewall (but with a limit of 10 IP addresses allowed through at any one time) Now, this managed hosting is at extra expense - somewhere in the region of $500 per month, and the limit on the number of IP addresses they'll manage on the firewall is also a real pain. My thinking is it would be better and cheaper to Stay with the same host since the dedicated box is fine Get an Amazon AWS account and use their server to manage backups; there are a number of good tools that can be used to automate the process Configure iptables so that I have complete control of the firewall I want to know Is a managed virtual firewall likely to be more secure than me configuring iptables? Whether, in your opinion, it's best to let someone else take care of backups? If, from your experience, there's anything else i'm missing that warrants using managed hosting over a DIY service? I think there is some reluctance to not having managed hosting since a managed host in effect takes responsibility for your server, whereas any hardware or security issues with a server that we manage would mean we are forced to hold our hands up when a client site goes down. That said, I personally don't think a managed host does that much in the day to day running of your server (backups are automatic, OS updates are carried out with ease, etc.).

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• RAID1: Migrate HHD to SSD?

  - by OMG Ponies

  My current workstation uses an Adaptec 5805, with Win2008 mirrored between two 72 GB (10K?) savvio drives. My question is if there's a way to migrate the mirror to use SSDs - I've been looking at 90GB Corsair Force (Sandy Bridge) to replace the existing setup. If it's possible, without installing the OS fresh. If I replaced the mirrored drive with an SSD, would the array sync the drives? Then I could promote the SSD mirror to be the primary, and use the second SSD as the mirror. That'd be too easy... Or should use Ghost to get an image of the existing setup, apply it to the SSD for a new mirror to be setup on?

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• Preventing ugly hyperlinks in Word-generated PDFs?

  - by Jay Levitt

  I'm creating a document in Word 2007 on Windows XP, and using the "Save As PDF" add-in. The document contains hyperlinks. When I open that PDF in Preview.app on a Mac (OS X 10.5.8), I see ugly boxes around all the hyperlinks. I've tried editing the PDF in Acrobat Pro 9.2.0 on the Mac, but the boxes don't show up there. If I select a hyperlink anyway with the Link Tool, right-click, and select "Properties..." no properties dialog ever appears. I want the links to be clickable, but I want them to look decent. How can I fix them? I don't have Acrobat for Windows.

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• What are the keyboard shortcuts to operate a Mac slider control

  - by doekman

  In the Safari RSS screen, there is a slider (or range) control to change an article's summary length. By pressing TAB a couple of times, it is possible to navigate to this control, without using the mouse. Is it also possible, to slide the slider with the keyboard? Thus sliding the knob to the right and left? The volume slider in iTunes can be operated by the arrow-keys, but in Safari's RSS window, these are used to scroll the text if there are any scrollbars... Note: in System Preferences, Keyboard (OS X 10.6), Keyboard Shortcuts, I have set Full Keyboard Access to All controls. Otherwise, the TAB key only navigates between text boxes and lists.

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• Can I use the voice & SMS features of my GSM SIM through my laptop?

  - by i..

  My laptop (a Lenovo T410s) has an internal GSM modem (device manager calls it a Qualcomm Gobi 2000 HS-USB Modem 9205) that I'm currently using a regular (voice, data, text, etc) 3G SIM in. The data functionality works great through the Lenovo software & Windows 7 but I was wondering if I can use the other features (specifically voice & SMS) through Windows. Is it posisble to use the non-data features of my 3G SIM through my Qualcomm GSM modem? If so, what software is available to this end? If not, where is the restriction? (e.g. hardware, OS, driver, software) Thanks!

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• LAMP setup - phpmyadmin says the mysqli extension is missing (but its listed in phpinfo)

  - by WebweaverD

  I regularly set up virtualbox ubuntu setups to run as local webservers. I have set these up several times and never had an issue. Recently I have been cloning them but wanted to do a fresh install this time in the hopes of fixing some niggling problems which have propagated through my setups. However, something has changed: 1)vb guest additions no longer allow me to copy and paste (i'll worry about that later) 2)more importantly phpmyadmin no longer works as installed - Initially going to localhost/phpmyadmin gave a message that the page could not be found. So I have followed some instructions (sorry I know its vague I cant find them now) which have created a phpmyadmin directory in /var/www but now I get an error saying: the mysqli extension is missing. If I run phpinfo mysql and mysqli are listed. All I have done so far is install apache2 (working) install php5 (which I think used to come with apache) Install mysql server (and client for good measure) and install phpmyadmin I found a post of a similar question which suggested I should install php5-mysql (done) and edit php.ini and uncomment the line extension-mysqli.so - this is not there, so I tried adding it with no joy. I have restarted apache and still no joy on phpmyadmin. Any help is much appreciated as this is driving me nuts. Why the change for the worse - I was just starting to like linux! I'm running a windows 7 machine and the guest os is ubuntu 12.04 - I ran apt-get update before doing anything so all packages should be the latest versions.

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• Can I run Linux on the HP Mini from Verizon Wireless, with a built-in 3G modem, and connect using the built in modem?

  - by Parker

  I apologize if my question made little sense, I am very tired at the moment. Anyway, Recently I purchases the HP Mini from Verizon Wireless. It runs on the Intel Atom processor and came with Windows 7 Starter Edition, which is quite possibly the worst and most restrictive OS I have ever used. I plan on installing CRUX, after doing a little research on minimal, free, Linux operating systems, as I am working on web programming using Python, among other things. My only worry is that, because my HP Mini uses a built in wireless card (and I have no wifi connection, only a 3G connection) that has a "mobile access" connection to Verizon wireless, I am not sure if after installing CRUX that I would still be able to connect using this option. I have never used Linux before, and am hoping this will work. So if anybody has experience with this...please answer, can I connect to vzw 3G with linux, using an internal mobile access card...

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• I shrunk the Windows partition, now it says grub rescue on boot

  - by user1009013

  I have got a machine with dual-boot Windows 7 and Ubuntu 11.10, and I wanted to add another OS to that (Jolicloud), so I started the partition manager in Windows and shrunk the Windows partition by about 10 GB (so now I have:Windows;currently empty 10GB;Ubuntu). I shutted down the computer because I was finished. Now when I started my machine again it says error:no such partition. grub rescue> and I can type commands. ls gives (hd0) (hd0,msdos5) (hd0,msdos4) (hd0,msdos2) (hd0,msdos1) (fd0) if that helps

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• Data transfer speed to USB storage connected to wifi router very slow

  - by RonakG

  Here is my setup. A Linksys Cisco E3200 wifi router. A MacbookPro running OS X Lion 10.7.4. A Seagate GoFlex 1TB hard drive connected to wifi router via the USB port. When I try to transfer data from my MBP to the HDD, the data transfer rate is very low. I'm getting around 3MB/s write speed. This is very slow compared to the speed I get when HDD is directly connected to the MBP. The HDD is NTFS formatted. And the router provides access to HDD using Samba share. So I connect to the HDD using smb://. What is the limiting factor here affecting the data transfer rate?

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• Network? or router? problem

  - by Robert H Mercer

  I have two computers networked through a Netgear WG914 router which is connected to an Ipstar satellite modem via the RG47 LAN connector. The main computer is running Windows 7 Pro 64bit and the secondary computer is running Windows 7 Home Edition 32bit. On occasion there is a loss of internet connection usually on the main computer, often followed by a loss on the secondary comuter. Not, however, always the case. Windows troubleshooter, naturally, is about as much use as a politician in government.......NONE. There appears to be no problem with the ISP bad as it is and often the connection will be remade without any help from me. The difference in the OS's is not of any relevance since I had this problem before I changed over to Windows 7. Not being a nerd when it comes to networking I wonder if anyone has any constructive suggestions.

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• Snow Leopard, PHP, and MySQL

  - by Peter

  I have just installed Snow Leopard and now my PHP/MySQL program ends in a "Segmentation fault". I have been searching the web for a solution, I realize that there are some issues with SL/PHP/MySQL, but I have not found anything that works yet. I downloaded the binary MySQL package mysql-5.1.42-osx10.6-x86_64. I have updated the php.ini file as suggested at various posts. When I run PHP and connect to the MySQL server the behavior is a bit random. In many cases it works fine to connect and read data. In my specific case the PHP program constructs a LOAD DATA LOCAL INFILE ... statement to load data from a text file. It should do several such queries after each other in a loop. It works one time but the halts in a "Segmentation fault". The program worked fine in Leopard, but not now. My versions are: OS 10.6.2, PHP 5.3.0, MySQL 5.1.42

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