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• afp/smb transfers caps at 2 megabytes/sec, wireless N

  - by RD.

  I wanted to transfer files between two mac computers. The network is wireless-N and both computers have wireless-N modules in them. The problem is that when I transfer files between them, via file sharing (afp) the network speed caps at 2 megabytes/sec. Just downloading files from the internet I can get faster speeds, so this isn't a constriction of my wifi bandwidth, it appears to be a constriction of the protocol being used. My wifi-n is set to 130mbits, so I should see real world transfer speeds around 12-16 megabytes/sec I did this command on both computers sudo sysctl -w net.inet.tcp.delayed_ack=0 which is supposed to lower tcp overhead, but this did not affect it. How can I get the speed I am expecting?

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• Lustre - is this bad form?

  - by ethrbunny

  Im going to be consolidating several 'server rooms' into a single installation soon. Part of this effort will be finding a home for 5Tb (and growing) of files / logs. To this end Im looking at Lustre and appreciating its ability to scale. The big vendors want to sell me a $20K SAN to manage this but Im wondering about buying several iSCSI units (like this http://www.asacomputers.com/3U-iSCSI-Solution.html) and using VMs for the OSS machines. This would let me fail-over to cover problems and not require a dedicated system for each OSS. Given articles like this (http://h30565.www3.hp.com/t5/Feature-Articles/RAID-Is-Dead-Long-Live-RAID/ba-p/1422) that talk about how RAID is not keeping up with drive density Im leaning towards more disks with lower capacity each. Again - some akin to the iSCSI array above. Tell me why this is a terrible idea. Do I really need to invest in a PE710 for each OSS/OST?

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• "save the changes" message after removing the protection from workbook Excel 2010

  - by abbasi

  Some time ago I protected the Excel 2010 file from the path File Protect workbook Encrypt with password and gave it a password. Now that I removed that password via below method: Open the workbook and use Save As In the lower right of the file window will be "Tools" Choose "General Options" Clear the password. Save over your old file. the file is openable without wanting a password. But the problem is when I open it and close it immediately, even without moving the active cell, the message "Do you want to save the changes you made to 'test.lsx'?" appears. While there hasn't occurred any changes to that file so why I face this message any time I want to close the file? Hasn't the file been corrupted?

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• my file download speed is 180-200kbps but speedtest is showing 1.7mbps and i am subsribed to 2mbps pack?

  - by edward

  i'm from Malaysia. I am subscribed to 2mbps pack from my country's ISP. But all i get is only 200kbps when download files from the internet, when i test my speed on speedtest.com , it shows me 1.7mbps. I am pretty confused , ISP should give users what they stated , yeah a 2mbps. But i only recieved 200kbps and the speedtest shows 1.7mbps which makes me confused even further. So i started googling and found out that it is related to something called VPN compression? can anyone explain to me how these things works? why am i getting much much lower speed than i have subscribe to. (I am using a D-Link DSL-2750 U modem) Thanks.

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• How to make Microsoft Keyboard special keys run osascript commands on OS X?

  - by t-a-w

  I'm trying to make (1) special key open new terminal window. I bound it to file /Users/taw/bin/new_term, which contains: #!/bin/sh exec osascript -e 'tell application "Terminal" to do script "cd ."' This does the trick, except it also opens a Terminal window with this (even though Terminal.app is configured to always close windows when processes finish): Last login: Thu Mar 11 19:41:29 on ttys000 /Users/taw/bin/new_term ; exit; ~$ /Users/taw/bin/new_term ; exit; tab 1 logout [Process completed] How do I make it all work correctly? (possibly using a way different that what I've been attempting so far)

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• Connection reseted- error 101

  - by Maja

  I have a problem with internet connection- when i try to load website, it will always write this error:Error 101 (net::ERR_CONNECTION_RESET): Connection was reseted. I'm using Win7 64 bit and I have this router: asus rt n10. First, i tried to change MTU from 1504 to 1472 and it worked for a while, but yesterday it started again. Now I have MTU 1440 but I don't want to lower it more. Is there another solution? Btw I have no malware in my laptop (I used the avast scan) and I've also deleted cookies and disabled proxy server (I'm not using any).

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• How to get monitor resolution of 1680x1050 using ATI Radeon HD 2600 PRO in a dual monitor setup

  - by user7651

  I have Sapphire ATI Radeon HD 2600 PRO graphics card in my Windows Server 2008 x64 machine. It has two outputs a VGA and a DVI. I have connected the DVI to my Dell 24" monitor with 1900x1200 resolution and it works 100%. The VGA I have connected to my second monitor a Samsung 22" with native resolution of 1680x1050. But the ATI driver and Catalyst control centre doesn't show this resolution as an option. If I choose a lower resolution like 1280x1024 it looks really bad and fuzzy. I searched in google and downloaded the powerstrip tool that allowed me to create a custom resolution of 1680x1050 and then this option shows up in Catalyst control centre and my 2nd monitor works fine now. But I don't want to pay for an application to choose a display resolution. Why doesn't ATI show me that option by default even though it has no problem in actually supporting the display at resolution. Is there a way to get 1680x1050 resolution using ATI drivers only ?

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• DIsable my nv video card driver in linux

  - by Dahaka Wang

  I'm trying to passthrough my nv video card to my domU, but I could not bind my video card to the pciback driver I only have one video card with the pci number 0000:03:00.0, so I used the following command echo -n "0000:03:00.0" > /sys/bus/pci/drivers/nouveau/bind to unbind the nouveau driver from my video card. The screen went black because I have forcefully removed the video driver, therefore I ssh'd into the computer to run further commands I ran: echo -n "0000:03:00.0" > /sys/bus/pci/drivers/pciback/bind to try to bind it to my pciback driver, but I got: bash: echo: write error: No such device I found out that this was the message shown when trying to bind a PCI device which is already bound. Therefore, I think that something was still using my video card Can anyone help me out? Thanks a lot!

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• How can I make VNC faster?

  - by NickAldwin

  I need to remotely access and use my work computer a few times a week. I want to use VNC because of the price. I've used VNC before, mostly on my own network, where it's fast. However, VNC over the internet is incredibly slow. Even at 256 colors and lower, with Aero turned off, it is unbearably slow. I recently used Ammyy Admin to connect to do something requiring a quick reaction time. Ammyy was really fast, with almost no lag, and it was running in full color with Aero on! How can I make VNC faster, like Ammyy is? I'd use Ammyy, but I would probably run into the 15hr/month limit pretty quickly. Any suggestions? [EDIT] I'm currently using UltraVNC.

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• Monitor does not work past certain resolution.

  - by Steve Stifler

  I have a Macbook 5.1 with Snow Leopard, and a Samsung SyncMaster 2253BW that I use for an external monitor. I connect it to my laptop via a DVI-to-MiniDisplayPort adapter. Whenever I try to set the resolution of the monitor to 1680x1050, its maximum resolution (at least the only one that fills the entire screen), the screen flickers once or twice before claiming there is no source attached. I've had this issue since the first time I tried to connect the two, however for some reason for a brief period in time the monitor would successfully display at full resolution. All lower resolutions work fine too, it's just at 1680x1050 that the problems occur. Any ideas as to why this is happening? Thanks.

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• Binding services to localhost and using SSH tunnels - can requests be forged?

  - by Martin

  Given a typical webserver, with Apache2, common PHP scripts and a DNS server, would it be sufficient from a security perspective to bind administration interfaces like phpmyadmin to localhost and access it via SSH tunnels? Or could somebody, who knew eg. that phpmyadmin (or any other commonly availible script) is listening at a certain port on localhost easily forge requests that would be executed if no other authentication was present? In other words: could somebody from somewhere in the internet easily forge a request, so that the webserver would accept it, thinking it originated from 127.0.0.1 if the server is listening on 127.0.0.1 only? If there were a risk, could it be somehow dealt with on a lower level than the application, eg. by using iptables? The idea being, that if someone found a weakness in a php script or apache, the network would still block this request because it did not arrive via a SSH-tunnel?

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• How can I make VNC faster?

  - by NickAldwin

  I need to remotely access and use my work computer a few times a week. I want to use VNC because of the price. I've used VNC before, mostly on my own network, where it's fast. However, VNC over the internet is incredibly slow. Even at 256 colors and lower, with Aero turned off, it is unbearably slow. I recently used Ammyy Admin to connect to do something requiring a quick reaction time. Ammyy was really fast, with almost no lag, and it was running in full color with Aero on! How can I make VNC faster, like Ammyy is? I'd use Ammyy, but I would probably run into the 15hr/month limit pretty quickly. Any suggestions? [EDIT] I'm currently using UltraVNC.

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• iterm2 emacsclient keybindings

  - by Zach

  I have just switched from using Emacs.app to emacsserver and emacsclient in terminal mode using iterm2 as my terminal emulator. I am having some trouble with some keybindings though. Particularly M-left arrow prints the character D, M-right arrow prints C, M-up arrow prints A, and M-down arrow prints B. I am using the xterm defaults for keys in iterm2 and have the left and right option keys bound to +Esc. This is particularly annoying in org-mode. Am I going to have to just rebind the keys in my .emacs? How would I go about doing that?

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• rsync server side limit bandwidth/connection

  - by c2h2

  In a VOIP application, I have upto 3000 clients rsync audio files from there linux server in a daily, server is placed at a data center (10Mbps in/out bound), the server works as a VOIP sip server running FreeSWITCH (low ping latency should be ensured.) Therefore I would like to have server side control of rsync which controls: Limit total outbound bandwidth. Limit total number of connections. (Reject clients while at max number of connection and let it retry after a specific time frame.) OPTIONAL: list/kill individual connections. Normally I would use ssh + rsync + pem_keys with some extra options, but above requirements are not feasible by simple command lines. Can anyone point me some direction. or show some scripts/tools? I would also probably integrate them and release on github. Thanks!

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• Why has the NoScript icon disappeared?

  - by Peter Mortensen

  Why has the appearence of NoScript changed? Using Noscript in Firefox (Microsoft Windows): Until now there has been an icon (the S icon) in the lower right of the screen. But now there is an button instead with the text "Options". Left clicking this button seems to bring up the menu as right clicking the old icon. Can I restore the previous state? Is there an auto-update function in NoScript and if so could it have caused the change? If it exists can the auto-update function be disabled? Platform: Firefox 3.0.6, NoScript 1.9.0.6, Windows XP 64 bit, 8 GB RAM.

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• Recovering database files from a corrupted VHD

  - by Apocalypse9

  We have a SQL server hosted on a virtual machine. Our hosting company updated/restarted the server and for some reason the virtual machines became unbootable. We've spoken to Microsoft and used a few higher level tools to attempt to recover the virtual machines but were unsuccessful. In browsing the file system the database folder doesn't even appear. I'm wondering if there are any lower level tools that might be able to find and copy the database files. As far as I know the physical hard drive is ok, so I'm hoping there may be some way to recover the files themselves even if the rest of the virtual machine file-system is a loss. Obviously we're in a bit of a bind, and any help/ suggestions are very much appreciated.

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• How do I know if my disks are being hit with too many I/O reads or writes or both?

  - by Mark F

  I know a bit about disk I/O and bottlenecks relating to this especially when relating to databases. How do I really know what the max I/O numbers will be for my disks? What metric might be available to me for working out roughly (but needs to be a good approximation) of how much capacity (if you will) have I got left available in I/O. I've seen it before where things are bubbling along nicely and then all of a sudden, everything screams to a halt, and it ends up being an I/O bound problem. Is there a better way to predict when I/O is reaching its limits? This article was interesting but not giving the answer I desire. So, is my best bet surrounding just looking at 'CPU I/O WAIT'? There must be a more reactive method than this.

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• Iptables REDIRECT + openvpn problem

  - by Emilio

  I want to redirect connection to port 22 to my openvpn binded port, on 60001. Openvpn is running on server on 60001 server:~$ sudo netstat -apn | grep openvpn udp 0 0 67.xx.xx.137:60001 0.0.0.0:* 4301/openvpn I redirect on server port 22 to 60001 server:~$ sudo iptables -F -t nat server:~$ sudo iptables -A PREROUTING -t nat -p udp --dport 22 -j REDIRECT --to-ports 60001 I start openvpn client (openvpn.conf is correct, it works with remote IP 22 replaced with remote IP 60001) client:~$ ./openvpn openvpn.conf Tue Apr 27 00:42:50 2010 OpenVPN 2.1.1 i686-pc-linux-gnu [SSL] [EPOLL] built on Mar 23 2010 Tue Apr 27 00:42:50 2010 UDPv4 link local (bound): [undef]:1194 Tue Apr 27 00:42:50 2010 UDPv4 link remote: 67.xx.xx.137:22 Tue Apr 27 00:42:52 2010 read UDPv4 [ECONNREFUSED]: Connection refused (code=111) Tue Apr 27 00:42:55 2010 read UDPv4 [ECONNREFUSED]: Connection refused (code=111) ... It doesn't connect. iptables shows requests from client to server but no answers. What's wrong with it?

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• asus 1215p cannot get the 1366 x 768 resolution

  - by Arthur

  Hi everyone, im a little bit stuck. I had a windows 7 starter installed on this netbook, it wasn't that great so I installed windows 7 ultimate. everything is OK apart from the screen resolution. it doesn't let me choose the optimal 1366x768 resolution and defaults to lower quality, in fact it doesn't even list it. I have tried drivers from Microsoft, Asus and Intel and still no joy. Any suggestions? It has the Intel 3150 Graphics Media Accelerator Much appreciated :)

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• How can I replace red in an image with a certain shade of gray?

  - by Malcolm Frexner

  In this image I have to change red to grey: I know I can just set the saturation to zero, but then the result is a grey that is to dark. I could just change the brightness, but that would also change the left lower part of the picture: Is there an adjustment that only works on the red parts of the image? I can't use a selection, because the setting has to be applied to lots of images. EDIT I tried to use "replace adjustment tool", but that did not work well for the shdows and bright parts of the image, even with the largest fuzzines. I used blue as the replacement colour, to have a better impression of what it does.

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• Which has a faster data transfer rate? WIFI (tablet or cell phone, not LTE) or MicroSD (Class 10)?

  - by techaddict

  Which of the two methods of dta transfer trasfers data at a faster rate for smartphones and tablets? Standard WIFI, or MicroSD Cards? I wonder if it would be actually faster to access data on external storage then it would be to have the MicroSD card in my smartphone or tablet. Currently I have a class 10 32GB MicroSD card in my cell phone. I am looking to get the new Google Nexus tablet but it does not offer expandable internal storage. I wonder if that's really a detriment; because if WIFI is faster than MicroSD, then it would matter almost none at all that you couldn't expand the storage internally. If the case is that WIFI is faster, and people caught onto this, then people could save a lot of money on lower memory ipads/iphones/ipods, tablets, and smartphones!

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• Can't unlock locked screen, in Ubuntu 12

  - by Camille Goudeseune

  After locking the screen (with a keystroke bound to xlock -nice 8 -mode blank), I can unlock the screen as expected, but only within a few minutes. After being locked overnight, when I hit a key (even Ctrl+Alt combos), the screen stays black with just a brief white flash across the middle of both monitors. The workaround is to ssh in from another host and restart X. Some months ago, this happened every few weeks. By now it happens almost every morning. How do I even start to diagnose this? What might I look for in log files? (The intermittency is particularly troubling.) Failing that, is there an alternative to xlock aka xlockmore? Hardware: 3-year-old HP minitower, GEForce 9800 GT, two Asus LCD monitors. Software: Ubuntu 12.04.2 LTS. Window manager awesome-wm. NVidia driver 304.88. XLock version xlockmore-5.31.

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• table alias (or 'symlink') in mysql

  - by andreash

  Hi there, in MySQL5.1, is there a way to make one table accessible by two different names? I'm thinking about somethink like a symlink on linux filesystems. I know theres the CREATE VIEW myview AS SELECT * FrOM mytable thing, but I don't only need to SELECT from both names, but also delete etc ... You might ask why I want to do this? It's about getting a commercial, closed-source app to work, which is crappily programmed (usually, the table names are all lower-case, but occasionally, they use capitalized names for the same table ...). Oh, that would be another idea: Is there a way to tell MySQL not to care about capitalization of table names (like on Windows filesystems?)? that would also do the trick ... Thanks for your insight! A.

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• Mutt: apply command to all tagged messages

  - by mrucci

  From the mutt manual: Once you have tagged the desired messages, you can use the tag-prefix operator, which is the ; (semicolon) key by default. When the tag-prefix operator is used, the next operation will be applied to all tagged messages if that operation can be used in that manner. But it seems that I can only execute commands that are already bound to a specific keyboard shortcut. For example I can use ;d to delete all selected messages. What if I want to apply an "unbound" command (such as purge-message)? I have also tried using something based on :exec tag-prefix or :push tag-prefix without success.

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• Quality wise, is Windows Media Audio 10 Professional equivalent to WMA?

  - by Louis

  I noticed that for encoding CD rips, Zune is still using WMA 9.2 instead of WMA 10 Pro. On a given file using the highest quality VBR settings looks like this: VBR Quality 98, 44 kHz, stereo 1-pass VBR On the same file if I use WMA 10 Pro, with the same settings, the resulting file is about 20% smaller. Using my ears, I'm unable to tell the difference, but I'm wondering if this was the goal of WMA 10 Pro (to be as good as WMA at a lower bitrate). Is the quality of a WMA 10 Pro file equal to that of a WMA 9.2 file encoded with the same settings?

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