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• CPU Affinity on ARM processors

  - by dsljanus

  I am using some RaspberryPI boards for a data acquisition system. They are nice boards, with plenty of community support around them, but they are really slow. I am thinking of gradually replacing them with ODROID multicore boards, with the Samsung Exynos processors. I have some experience using taskset to set CPU affinity on my servers because I am always running Node.js applications that are by definition single threaded. Now, is it possible to do this on an ARM board? I do not see why it would not in theory, but I have doubts over how well it is going to work. Does anyone have experience with this kind of hack? Also, I would appreciate any comments about ARM CPUs and how they differ from x86.

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• Windows Server 2008: Limit UDP/TCP packets per IP or ban

  - by WBAR

  How I can limit UDP/TCP packets per IP send to my host (or better PORT) per second or minute ? Would be nice to ban that IP for 12/24 hours or even for ever. I got Windows Server 2008 and I'm very poor in Windows administration but quite good in Linux. EDIT: By basic problem is that They sending a lot of rubbish UPD and TCP packets.. TCP packets without SYNCH, fragmented UDP packets so my servers stop responding.. So I need to cut off users (IPs) sending more than X packets per second. I need solution witch provides me, somehow, configurable: X packets of certain type (UDP, TCP or both - lets say parameter named Z ) are allowed to be received by IP on Y port, otherwise this packet should be DROPPED. My virtual hosts are hosted by VirtualBox and I'm able to forward all incoming packets certain type and certain port to the specific Virtual Host, but I need to DROP them before my VirtualBox receive them.

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• World's simplest, LIGHTEST email client?

  - by rekindleMyLoveOf

  I do not want the bloat that is outlook, nor do I need exchange server-like nifty features. Most certainly do not want the bloat that is thunderbird. I just want to be able to send and receive email as/with the particular email account I set up on my domain. Pocomail sounded like a nice idea but apparently it does not deal with html and since this is for a tiny fledgling biz, i think I might need to accomodate html... so I didn't investigate further. Too bad gmail won't let me send from my own mail server, really. :o) What do you guys use that simple and nifty? ===edit=== forgot to mention this is going to be on Windows Vista. (Hey, I'm not a "superuser", okay? I got bounced from stackoverflow :-) )

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• Tidying up old apache logs managed by vlogger

  - by Andre Lackmann

  We're using vlogger to manage our apache logs which keeps everything nice and neat but pretty much breaks the ability to use logrotate from as far as I can see. eg. our virtual access.logs each sit within their own dir and are named similar to: /virtual.com/ 20100501-access.log 20100502-access.log 20100503-access.log 20100504-access.log etc.. Has anyone created a cleanup script to go through the /var/log/httpd/ sub dirs and remove old logs? We like using vlogger, but cleaning up olds logs after it is a pain!

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• Looking for new hosting company

  - by Charles Chadwick

  I am currently looking for a new hosting company for my business. We are a design and development company and have been recommending WestHost to our clients for the last several years. However due to some changes they have implemented in the last year, we have decided to start referring people elsewhere. Most of our clients need affordable Linux hosting with the basics. SSH is also a definite must and 24/7 support (preferably phone, as well as email/ticket system) that won't cost extra. An easy to use and understand control panel would be nice as well. I have heard good things about HostGator, and am wondering if anyone has experience with them. The prices seem right and they have everything we need. We are also thinking of purchasing a dedicated server with them for a specific project that's going to require one. I don't know if I am asking this in the right place, if this is not welcome here please let me know.

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• Free Markdown JS viewer

  - by maaartinus

  I'd like to use Markdown for documents to be exchanged with a colleague of mine. The ideal workflow would be IMHO editing the source in any plaintext editor while simultaneously viewing it in a browser. The client viewer should be able to redraw the text after each save automatically, and ideally even always switch to the most recent source file (so I don't need to navigate there manually). It'd be nice if I could (was allowed) modify the viewer a bit, things like using trailing spaces for line breaks are really terrible (I don't see them, my editor strips them, git complains about them, etc.). I'm interested in a software capable of this and easy to modify, and also in your opinions on the described workflow.

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• IP Connflict on network

  - by PSU_Kardi

  I keep getting an IP conflict on my home network and can't figure out why. I'm running a Belkin-N wireless router that has an Ethernet connection to my 360 and a wireless connection running to my laptop. It's WPA2 encryption and I have a nice password on my router consisting of letters , numbers and special characters. But for some reason I keep getting IP conflicts at night time...By the time I look into the problem I don't see anyone else on the network. Is my router giving me false positives?

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• Apple Software Update Server for Windows

  - by Matthew Iselin

  We have just added a few iMacs to our system and we've found that they all want to download about 1.6 GB of updates... not so great when we only have limited monthly bandwidth! All of our Windows machines just use WSUS, which works great in our environment. It'd be nice if we could do the same for the iMacs without purchasing an additional Mac for a server role. So is it possible to run Apple's Software Update Server on a Windows server? Or do we need to look at purchasing a Mac in order to distribute updates across our clients? Alternatively, could we set up one of the iMacs to run the update server for the other iMacs whilst it is being used as a standard machine (ie, not installing OSX server, and keeping it available for staff to use)?

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• Volume display for laptop missing after driver update

  - by Cyclone

  I have a Dell Inspiron 1520, and I just updated my audio drivers to be able to use Stereo Mix. It's a SigmaTel audio driver. Prior to the update, whenever I used the hardware buttons to update volume or mute/unmute speakers, it would always have a nice display like this one: But, for volume instead of screen brightness. The hardware buttons still work fortunately, but the volume display is gone. Is there a place I can configure this setting and re-enable it? The speaker icon in task tray was also disabled with the update, but I re-enabled that from the Control Panel. Is this simply gone with the driver update? Thanks for the help!

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• In Linux, are there any plug-ins to let me do `<Win>`+`<Num>` style app switching (like Windows 7's superbar)?

  - by kizzx2

  Using Windows 7's superbar, I can select/launch the 2nd application group by <Win>+<2>. We have DockbarX in GNOME, which is nice (grouping the windows like Windows 7), but it doesn't enable the <Win>+<2> style keybaord shortcuts. Any suggestions? This is not restricted to making Linux like Windows. But I just find the <Win>+<2> style shortcut very useful. Are there similar ways in Linux to quickly switch between specific apps without pressing <Alt>+<Tab> many many times?

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• Intel SASWT4I SAS/SATA Controller Question

  - by Joe Hopfgartner

  Hey there! I want to assemble a cheap storage sytem based on the Norco RPC-4020 Case. When searching for controllers I found this one: Intel® RAID Controller SASWT4I This is a quote form the Spec Sheet: Scalability. Supports up to 122 physical devices in SAS mode which is ideal for employing JBODs (Just a Bunch Of Disks) or up to 14 devices in RAID 0, 1, 1E/10E mode through direct connect device attachment or through expander backplane support. Does that mean I can attatch 14 SATA drives directly to the controller using SFF-8087 - 4x SATA breakout cables? That would be nice because then I can choose a mainboard that has 6 Onboard SATA and i can connect all 20 bays while only spending 155$ on the controller and like another 100$ on cables. Would that work? And why is it 14 and not 16 when there are 4 Ports? I am really confused about all the breakout/fanout/(edge-)expanding/multiplying/channel stuff...

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• Video on demand streaming solution

  - by Rafal Saltarski

  we are looking into building a commercial vod service and I'm doing research on the subject. We need the video to be protected with DRM so users cant rip/copy (i realise its mostly useless but the lawyers demand it from us) and the server solution to be scalable and able to distrubute content in hd to a high number of clients. Besides, we would need to be able to develop a player integrated with the payment system, so users that havent bought access would for example only see the first 30 seconds of video and then have the playback interrupted, or only be able to watch video for 72h after payment. Also it would be nice if we could distribute video to mobile platforms like android/wp8/ios but thats not a priority at the moment. I have zero experience on that topic so I would greatly appreciate any feedback or giving me stuff to read about like protocols or key phrases i should know. Thanks

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• What is causing a vm to exhibit packet loss?

  - by Joe Philllips

  We have a pretty nice piece of hardware set up to run multiple virtual machines in vmware and one of the vm's is an instance of Windows Server 2003 running SQL Server 2005. For some reason we occasionally see 10-20 seconds of straight packet loss to this machine from remote machines (my workstation) as well as other vm's on the same physical hardware. I am using PingPlotter to keep a close eye on the packet loss. So far we've turned off flow control on the NIC but we are already running out of other things to try. What might be causing this and how can I identify the problem? Note: We also have another server with a very similar configuration with the same type of problem to a lesser extent (because its not used as heavily?)

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• How to interpret IOZone results?

  - by homer5439

  Here are the resuts of running IOZone on an ext3 filesystem on an LVM volume residing on a SAN LUN (it was ran with 5 parallel processes). "Throughput report Y-axis is type of test X-axis is number of processes" "Record size = 4 Kbytes " "Output is in Kbytes/sec" " Initial write " 81628.55 " Rewrite " 83354.72 " Read " 115595.02 " Re-read " 119306.09 " Reverse Read " 47684.20 " Stride read " 10011.09 " Random read " 16751.27 " Mixed workload " 5659.77 " Random write " 1661.85 " Pwrite " 36030.83 Now this is all nice and dandy, but my question is: how do I know whether the values are as good as they could be or there is something to tweak (and if so, what?) The actual usage I will have for that Logical Volume is to act as virtual disk for a VM.

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• Limited access to Amazon S3 buckets

  - by Tomas Markauskas

  Is it possible to somehow limit the access to an Amazon S3 account. I don't really like the idea of distributing my secret access key to all of my applications, that want to access just a single bucket on my account. If someone gains access to one of the applications, I could loose all my data stored on S3. One way I was thinking to do it would be creating a second S3 account and give it access to just one bucket of the main account, but it's not really a great solution. Another nice thing for me would be to give the secondary account only write (but not modify/delete) and read access. That way I could upload backups or other files and be sure, that they won't get lost.

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• ISPs with good upload speeds? [closed]

  - by Josh Comley

  I am a web developer, and I spend most of my time not waiting for downloads but waiting for my latest build of a website to publish to a test site. I use the excellent BeyondCompare to ensure I only upload what I need to upload. But still, if a 2MB C# DLL has changed, so be it. And I must wait. At work we host our own servers and have a dedicated line, so for 8.5 hours of my day I have blistering upload speeds across the web, which is nice. At home however, it's a different story. I am with Virgin Media on their XL internet package (I think). I think that means I get 256Kb upload and 20Mb download. So I have began to wonder - are there any ISPs in the UK with good upload speeds? If you know of any for other countries, do post for other's sake, but please specify which country your post is relevant to.

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• Ideas of subjects for Diplomas for students who are getting Network Engineering degree

  - by wik

  Looking for an ideas and solutions of possible problems to be used as a part of pre-diploma practice for students who getting Network Engineering degree. The important requirement: The problem must be solved by designing new device or software which incorporate(or improve) with existent device. It's could be something industry specific, particular problem, etc. Thanks. p.s. The time for writing diploma is also limited by few month here, i.e. it's will be hard to solve very complex problems, but would be nice to hear something fresh :)

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• Using Windows 7 XP Mode for games

  - by Josefvz

  Hi all. I have Win 7 (x64) at home and I want to play some old games (specifically Lands of Lore 3, but also some others). This game does not work properly on Win 7, and there are no patches that I'm aware of to fix its issues. Can I use XP Mode to play this game (and other non Win 7 nice games), or is there a better way? I only have one PC and dual booting scares me... (so no to dual booting!) Another question: Will I have full hardware support (full use of my graphics card, etc) when I use DOSbox or a VM? I have decided to go with VirtualBox or vmware, I'll check which one gives the best performance, thanks for your input!

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• Need personal music collection streaming solution

  - by purpler

  I used to use Opera and it's built in media server feature for some time and it both worked and looked really well. It's dead now and i'm in search of a decent audio streaming solution (Windows 8) to be able to stream my music collection via http to work or whatever.. I tried couple of PHP scripts but they all looked really awful, also, tried couple of solutions mentioned here at Superuser but i wasn't really satisfied.. I tried vibestreamer as well and while it looks really nice i'm not really into installing it as an application. I've set up an WAMP server which i intend to use in this purpose. I'd be mostly satisfied with a way to browse my collection folders and pick the one i want to play, no playlists and various sorting features a la iTunes. Any suggestions? Thanks

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• BGP Router reccomendations for simple redundancy [closed]

  - by Jona

  We have two sites that each have an internet connection and have a dedicated dark fibre between them. Each site has it's own IP space and we have an AS number. We're looking to be resilient to failure of the internet connection to either site and so need to buy a pair of approriate routers. Requirements are: Able to run 2 bgp sessions (one with the ISP, one with the other site router) Option to take a full table from the upstream ISPs would be nice. Able to provide HA gateways on the LAN side (e.g. 192.168.0.254 will automatically migrate if it's host router lost power) A dedicated device rather than a server running Linux / BSD Not crazy expensive. Any help / advice much appreciated.

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• Mass editing videos on Ubuntu?

  - by rick

  Hi, I'm trying to add a watermark and a credits image to all of my old videos. I downloaded them off YouTube so they are all flv (H.264?). Is there some software that will allow me do simple edits in batches? I know a little bit of Python and tried looking at some of the library but they all seem like overkill (and way above my head). So is there a solution besides getting some software and going through all my videos and doing it manually? They are all mostly the same length, but it would be nice to specify a relative position for my credits. e.g. show a static image for 10 seconds when the video is at 95%

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• Can I use a cheap inverter for my laptop?

  - by Georg

  I'm going to travel in a car this summer. It would be very nice if I could charge my laptop using the cigarette lighter. Because my computer is from Apple, there's no way to directly connect the two, therefore I need an inverter that provides 120V alternating current. There are many different models, ranging from very cheap to really expensive. The wave forms are: (from most expensive to cheapest) sine modified sine trapezoid square Can I use just any inverter or does it have to be a sine inverter? If so, what happens to my computer in case I use the wrong one. The laptop is a MacBook witch needs 60W.

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• Inexpensive degaussers or HDD shredders?

  - by Nicholas Knight

  I do a lot of work for a small cash-strapped business that has a lot of active hard drives, most are consumer-grade SATA of about five years of age, and predictably they are dying at an increasing rate, and a lot of the time they can't even be detected, let alone complete a zero-out cycle. Right now those drives are just being stored, but that can't continue forever. We've got a couple bad LTO tapes it'd be nice to deal with, too. There are very real security and legal issues that make dropping them off with someone who claims they'll be properly destroyed a gamble. I've looked around at degaussers and HDD shredders, and the ones that don't look like they come from some guy in his basement all seem to be $3000+, which is hard to swallow right now. Is there anything out there in the $500-1500 range that you would recommend? (Speed isn't a big issue, if it takes several minutes or even hours per drive, that's completely OK, we've only got 10 or so thus far.)

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• ntbackup workalike for adhoc full backups in Windows 7 thats free and preferably open source

  - by Justin Dearing

  On windows 2000 and XP machines I used to be able to do the following: ntbackup backup systemstate c: /f e:\backups\machineName\machineName-full+systemstate_200101206.bkf This gave me a full backup of the system that I could use to do a system restore, after doing a barebones OS install. Windows 7 has a great utility for regular backups with alerting and all that stuff. It does not seem to have command line support. I'd like a backup solution for my Windwos 7 systems that has the following features: Is free Is open source (preferebly) Works while the system is booted and leaves the system functional (clonezilla is great for offline backups, and I use that too) Gives me a backup that is suited for a full system restore or partial system restore (ruling out most imaging software even if they could work while the system is booted via some sort of shadow copy voodoo) Can work via the command line Compression would be nice, the ability to pipe output would be better.

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• How do you pronounce Linux?

  - by Xerxes

  I'm tired of the old fart at work who keeps coming upto my desk and telling me all about his "years of experience in working with Unix and Lye-nix". I couldn't vent it out at him because that would be wrong, so I'm going to vent it out here - because obviously (that's the right thing to do...). Anyway, for all the people that practice in this disgusting behaviour - the pronunciation is.... (Hmmm - anyone know phonetics?) - "Li-nix" Note: Despite hating him for this - he is otherwise a very nice (but sometimes rather annoying) person. Now... to formally make this a "question" - Could someone write the phonetics for pronouncing "Linux", and also the notorious "Lye-nix", so I can make a note of it for future ventings? I think this is right... L?n?x, NOT L?n?x. ...or perhaps... L?n?x, NOT L?n?x* Can someone confirm the correct phonetics? (Listen to Linus on the matter).

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