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• Centos OS resource footprint vs Ubuntu package refresh

  - by webworm

  I am trying to determine which distro to sink my teeth into. I am new to the Linux world and would like to choose a distro to focus on. I have read that CentOS uses less resources than Ubuntu, which is an issue for me since I am renting a VPS and resource cost is an issue. I have also read that Ubuntu has more up-to-date packages which is a concern for me as I want to use PHP and some packages that have a fair amount of dependencies. I am not using Linux as a desktop OS, rather just as a server for Apache, PHP, PERL, and Java development. What would be the best choice for a server OS? CentOS or Ubuntu? Are the resource requirements that different? Are the packages that different between the two? Thanks.

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• Will Windows 7 Home Premium access company domain?

  - by neurino

  I'm going to buy 3 lowest-cost possible pcs for new trainee starting in our company. I found some HP notebooks with Windows 7 Home Premium installed. Will users be able to access to company Windows domain (i.e. to log as MY_COMPANY\username)? Or do I need Windows 7 Pro? Which functionalities are missing in Home version? Remote Desktop? edit: about sharing folders I can, with my linux machine along with my domain user and password, join the samba shared folders and printers and this could be enough for our needs. Everithing Users need is: shared domain folders shared domain printers remote desktop to access server remotely

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• Can I run my OS from a DVD?

  - by Dave D

  I'm thinking of ways to get around the high cost of hard drives lately. I was thinking an optical jukebox would be interesting (though more expensive than just buying a hard drive), then thought I've heard of OS's run from DVD so why not boot from a Blue-ray drive. I think a smaller OS like a linux flavor would work. I'd like to know if there's a way I could burn Windows 7 to DVD for this use. Just curious. Anyone know if this is possible? Thanks, Mac

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• Hardware for Capturing Packets

  - by Kevin

  One of my clients is a small school district in Texas. Like any school, they often have problems with network'd peripherals such as printers, et al. It would be nice to be able to simply "listen" to what the printer and PC are saying to each other (or not saying more importantly)... The problem is that I can't find old-style "hubs" anymore, and even if I could, it's not a long-term solution. All of the devices that I have found to replicate the purpose of a simple hub are either $100+ or are difficult to throw into a networking tool kit (aka my backpack)... Now that hubs are dead, what's the new low-cost standard for simple packet capture in the networking world?

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• Boxee on Dell 32in TV causes headaches, how to troubleshoot?

  - by brown145

  I have revamped an old pc, installing 4GB ram and a 256MB video card so that I could run Boxee to a Dell W3200 series TV that came with my apartment. It is connected via VGA, resolution is 1360x768, 24bit color, 60Htz refresh rate. Unfortunately, every time I use it I end up with a headache after less that 30 min. I have had my eyes check recently, and am able to play xbox (connected via hdmi) on the same TV without problems. What are the potential causes? My system seems to well meet or exceed the min requirements for boxee, XP, AMD Atholon 64 X2 Dual Core, 4GB RAM. Could it be the VGA cable? What is the most cost effective way to trouble shoot?

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• Visual Studio Development on Virtual Box, Boot Camp, or VMWare Fusion

  - by Eli

  I currently have a Mac, 2ghz and 2 gigs of ram, running OS X Leopard and Virtual Box with a Windows 7 Pro 32bit virtual machine. Performance on the virtual machine is fine for minor tasks but is very clunky while trying to multi-task or develop in Visual Studio 2008. What would be my best option for being able to use Visual Studio, keeping cost and time in mind? 1) Upgrade ram to 4 gigs ($100). Will this really improve my performance enough to use Visual Studio in a Windows 7 vm? Or am I just wasting time/money? 2) Reinstall/restore Windows 7 disk image as a Boot Camp partition. I assume this should improve my performance, yes? 3) Purchase VMWare fusion instead of VirtualBox. Does Fusion require less resources to run? I am open to any suggestions. Thanks in advance

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• Is there a software that can remap the keys for a speficic keyboard?

  - by Vilx-

  There are several keyboards attached to my computer. I'd like to remap the keys on ONE of them, but keep the rest as they were. Is there a software that does this? As for the "why" - I have this idea that I'd like to have a "multimedia keypad" which is separate from my main keyboard, but I could not find any online. So I think that I could take a typical USB numpad (they cost like 5$), and remap the keys on one of them. Add appropriate stickers, and I'm all seat, cheaply. I know that it's theoretically possible, but before I get my hands dirty and write my own software, I'd like to see if there's maybe an existing one out there. Oh, yes, I'm running Windows 7.

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• Transporting servers - need special rack/case

  - by Nso

  I am responsible for our companys server infrastructure at trade shows. We have 2 annual shows, 1 in Las Vegas and 1 in Amsterdam, so obviously our servers do quite a bit of travelling. Quite often, it gets home with pieces falling off, and insurance/rebuilding takes ages and cost a lot of money. For now I have been using a wooden rack-box, with steel-reinforced sides/corners, but I am looking for something tougher. Does anyone have experience with sending servers all around the world, without them dieing all the time?

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• In BASH, are wildcard expansions guaranteed to be in order?

  - by ArtB

  Is the expansion of a wildcard in BASH guaranteed to be in alphabetical order? I forced to split a large file into [10Mb pieces][1] so that they can be be accepted by my Mercurial repository. So I was thinking I could use: split -b 10485760 Big.file BigFilePiece. and then in place of: cat BigFile | bigFileProcessor I could do: cat BigFilePiece.* | bigFileProcessor In its place. However, I could not find anywhere that guaranteed that the expansion of the asterisk (aka wildcard, aka '*' ) would always be in alphabetical order so that .aa came before .ab ( as opposed to be timestamp ordering or something like that ). Also, are there any flaws in my plan? How great is the performance cost of cating the file together?

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• Which SSL certificate to buy [closed]

  - by Sparsh Gupta

  I am reading several notes on SSL certificates and comparison. What matters to me the most is speed. I can read that encryption is same with all different certificates available but I was wondering if there is any difference in the performance of the website with different certificates involved. I am ofcourse interested in end to end response times and I wonder if the type of encryption or number of certificates required as Chain Certificates makes a difference in speed. I dont really care for cost but looking for a good SSL certificate which ideally gives me absolutely no pain and best performance. Recommendations?

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• What is the best ways to duplicate DVDs in bulk?

  - by Axxmasterr

  I have some instructional videos I am getting ready to release on DVD and I want to know what is the quickest and most cost effective way to produce these in bulk? I am open to both customized PC based software/hardware solutions as well as dedicated hardware appliances which perform the same function. All options considered seriously. I don't have a problem building a system for this purpose. If I build something I would prefer it have the ability to make multiple copies at once. I figure I will need to make about 300 copies initially.

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• Can you set up a Linode VPS as a reseller type scenario?

  - by MAZUMA

  First, I'm a fairly green on this subject. So, go easy. I do web design and development and would like to set up a way to be the central host so to speak for my clients. Currently they are scattered across multiple hosting companies. I've looked at some the cheapy options like a LunarPages and some of the more robust options like RackSpace Cloud and Linode. RackSpace has a reseller program, but it's managed and more at the top end on cost. I'm not seeing any type of reseller program in place for Linode. Can I purchase a higher Linode plan and use Apache2's VirtualHost configuration to handle multiple domains (about 8 domains, but hopefully will grow.). Or, am I not thinking about this correctly?

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• How large administrators team should be? [closed]

  - by Artyom

  I'm trying to find an answer about how many server administrators/technicians are required to run a server farm with 7/24 availability of let's 10, 100, 1000 Linux servers? Are there any studies for this? Edit I was not expected this question to be closed. There are lots of studies about for example software development where from "lines of code" you can approximate the software development cost (COCOMO), so I was searching for something similar in administration. Note, I'm 100% understand that it is not a straightforward or easy to answer question, but it is a real question...

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• Workstation Build: Single 2.66ghz i-7 with overclock potential, OR Dual 5520 2.26ghz Xeons?

  - by jdc0589

  There are probably better places to ask this, but I am used to the excellent quality of responses on stack overflow. I am rebuilding my desktop in a few months. Aside from normal lightweight internet usage, I use it to run sqlServer, mySql, 1-2 Ubuntu VMs from time to time, lots of IDE's, and a media server for my PS3. The two possible setups cost the exact same amount (within $50) and would both have 12gb 1333mhz ddr3 ram and a 500gb RAID-0 array (250x2). Now, If I go with a single i-7 920 2.66ghz quadcore, I can easily overclock it to 3ghz, and would have cash leftover to get a 160gb ssd (either the ocz vertex or the 120gb intel) for the main OS/Program install drive. Else, I could get a dual lga1366 motherboard with two e5520 Xeon's (2.26ghz),just use the disks I already have. So, do I go for 8 physical/16 virtual cores at 2.26ghz (No overclocking on server boards) with normal disk I/O, or a 4 physical/8 virtual cores at 3.0ghz with really outstanding disk I/O?

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• c++ overloading delete, retrieve size

  - by user300713

  Hi, I am currently writing a small custom memory Allocator in c++, and want to use it together with operator overloading of new/delete. Anyways, my memory Allocator basicall checks if the requested memory is over a certain threshold, and if so uses malloc to allocate the requested memory chunk. Otherwise the memory will be provided by some fixedPool allocators. that generally works, but for my deallocation function looks like this: void MemoryManager::deallocate(void * _ptr, size_t _size){ if(_size heapThreshold) deallocHeap(_ptr); else deallocFixedPool(_ptr, _size); } so I need to provide the size of the chunk pointed to, to deallocate from the right place. No the problem is that the delete keyword does not provide any hint on the size of the deleted chunk, so I would need something like this: void operator delete(void * _ptr, size_t _size){ MemoryManager::deallocate(_ptr, _size); } But as far as I can see, there is no way to determine the size inside the delete operator.- If I want to keep things the way it is right now, would I have to save the size of the memory chunks myself? Any ideas on how to solve this are welcome! Thanks!

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• Do I have to use a DNS PTR?

  - by JrSysAdmin

  I am currently working on a site in my free time with a few other guys and we are wanting to redirect xxx.com to our new site, yyy.com. So we have xxx.com set to redirect the 216.111.11.1 which is the IP for yyy.com. However, this just says the website is unavailable so it seems as though we need a DNS PTR to redirect 216.111.11.1 to yyy.com. Is there any way to do this without a DNS PTR? The pointer will cost us $15 and it just seems like there should be some better way to go about doing this. Any ideas?

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• How to alter Postgres table data based on its contents?

  - by williamjones

  This is probably a super simple question, but I'm struggling to come up with the right keywords to find it on Google. I have a Postgres table that has among its contents a column of type text named content_type. That stores what type of entry is stored in that row. There are only about 5 different types, and I decided I want to change one of them to display as something else in my application (I had been directly displaying these). It struck me that it's funny that my view is being dictated by my database model, and I decided I would convert the types being stored in my database as strings into integers, and enumerate the possible types in my application with constants that convert them into their display names. That way, if I ever got the urge to change any category names again, I could just change it with one alteration of a constant. I also have the hunch that storing integers might be somewhat more efficient than storing text in the database. First, a quick threshold question of, is this a good idea? Any feedback or anything I missed? Second, and my main question, what's the Postgres command I could enter to make an alteration like this? I'm thinking I could start by renaming the old content_type column to old_content_type and then creating a new integer column content_type. However, what command would look at a row's old_content_type and fill in the new content_type column based off of that?

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• Determining the State of a User using their Hostname

  - by PhpMyCoder

  Not sure if this is the right SE site. I figured this question doesn't belong on SO, but if you think it doesn't belong here either, I apologize. I've been looking into determining the location, specifically the state, of a user accessing my website. One of the options I've known about for a while is the GeoIP City Database, however this isn't the most cost effective solution and I'm cheap so I was looking for a less expensive way. Something that occurred to me was that my state was in the public hostname assigned to me by Comcast: (Dash Separated IP).hsd1.ma.comcast.net Could it be possible that other ISPs follow this same pattern of inserting the state abbreviation into their users' hostnames? I've been looking around for a list of hostnames for other ISPs, but I haven't found anything. Can anyone verify that this holds true for other major ISPs?

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• Running a home mail server using dynamic dns

  - by user4009

  Hi, Is it possible to run an email server on my home box using dynamic dns? The scenario is, I want to auto cc all incoming and outgoing emails from my one account to another, from some server side config instead of configuring email clients for rules. I have tried Google Apps Mail but it doesn't allow auto cc of outgoing emails. After having read tons of blogs, forum messages etc (hope I have been reading the correct info :) ) the only option to achieve what I am needing is to setup my own mail server, but the cost of getting a static IP doesn't fit my budget. Please can someone point me in the correct direction. Platform doesn't matter, I can setup a Windows or Linux server. Many Thanks

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• Can the Nikon D50 be hacked to record video?

  - by andy

  I mean hacked in terms of software only, and minor hardware hacking if necessary, without of course breaking the camera. Also, if possible, video should be able to be recorded at an acceptable frame rate, around 20fps. thanks p.s. Reason for this question: Just to give some context before people tell me to buy a new camera! For still photography I now almost exclusively shoot film with a Nikon F3, and my D50 is gathering dust. I want to shoot some video of my Capoeria classes, for personal use, and thought maybe I could put my D50 to good use. Yes, I could buy a D5000 or older D90, but really I just want to shoot some video with my nice wide Nikkor lenses at no extra cost!

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• Tons of spam on dreamhost mail user account

  - by user122022

  I use dreamhost for my webserver/ email host. I have about 25 users on one domain. and 1 of these users is absolutely inundated with spam every day. I have tried using dreamhosts poor blacklist feature, which was semi working (still letting a lot through) but I reached the 1000 email blacklist maximum very quickly. I have the ability to switch to google apps but that would be very expensive for 25 users. What options do I have aside from changing hosts with better spam filtering? I don't think its possible to only switch 1 user to google apps, it has to be the whole domain. There are other benefits to switching but I don't think they outweigh the cost for this company.

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• Windows updates behind a physical firewall with only IP based rules and generic outbound connections are turned off

  - by user125245

  I have some boxes that I do not want to allow any in or outbound traffic to the internet Except for windows updates. However the fire wall in place (Cisco ASA) apparently only supports ip based rules. As best I can tell access to Microsoft updates via anything other then the half dozen URL masks the Microsoft lists as needed does not appear possible. I have kicked around building a full WSUS that I would then manually copy the update files to so that no direct Microsoft access is needed but this sounds very top heavy for the very few boxes involved. I have also kicked around manual updates all around but am not certain how to be conveniently and confidently sure that the correct updates are being applied in the correct order. Any ideas from any direction would be appreciated. I want this as simple / cost effective as possible but have very little flexibility on the only absolutely required internet access policy.

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• Suggestions for hosted file sharing services

  - by Jon

  Before I pose my question, I will give some insight as per my scenario: I work for a small business (cost is an important factor) Our bandwidth is limited and would not support an in-house FTP server We need to share files (mostly pdf, inDesign, Illustrator documents) to our clients, and as we expand, we are finding that our current locally-hosted FTP solution is too slow and is becoming a detriment to our sales team. What we need is a remotely hosted solution to share files with our clients, specifically with the following features: Greater than 100gb of secure storage The Ability to distribute unique log in credentials to clients, granting access to a personalized directory or folder, while limiting access to other files on the server. A relatively simple web-based UI for clients with limited computer knowledge We have considered a dedicated remote server, and web-based services (box.net, yousendit.com, onehub.com, filesanywhere.com) but I am unsure as per the direction we should be taking - have I left another solution out? What would you suggest? Thanks in advance.

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• Computer stopped working (ASUS P5GD1-VM)

  - by Gordonrjones

  My computer stopped working the other day. I came down and it was kind of chirping away. Then, when I restarted it, it only did the same thing. I unplugged everything not needed and it did nothing at all. I thought maybe the power supply wasn't working, but when I took the cover off the green light on the motherboard was on and the power supply is making a little buzzing sound. But nothing happens when I turn the computer on, other than the green light on the motherboard flickers a bit. I checked the memory in other computer and it works fine. I'd love to be able to fix this with as little cost as possible. Can someone here help? P4-640 (3.2E GHz, 800 FSB, L2:2MB, EM64T, HT)

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• I need an other videocard to replace my ATI HD 5870 which one is good? [closed]

  - by Chris

  At this moment I have a ATI HD 5870 iCooler 5 and I game a lot. I want to replace the card for another, I don't have room in my case to add another 5870. I mainly play games like Battlefield 3, but I can't play this game on Ultra high, for me is this pretty important. So here are my questions: Price is not an issue because computers are a big hobby to me and hobbies cost money :-) Can anyone recommend me a better card, ATI or Nvidia does not mather to me. Why is this card better?

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