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• ruby on rails server is intermittently slow

  - by Richard

  My rails installation was chugging along nicely. Last night we had to perform a hot-patch with was really a standard deploy of some exception code. Once capistrano finished the operation one of our admins discovered that there were two long running passenger processes. While we have deployed release over the past two weeks it would appear that these processes have been here and alive the whole time. Granted they could have been zombies or any other artifact and at this point we do not know what state they were in. Which leads me to the question: There are so many moving parts between the rails application and the OS/hardware that being a SME is probably no longer possible. So; how does a sysadmin perform root-cause analysis with any certainty? And: When do I just start rebooting servers?

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• Windows XP: how to disable automatic encryption on downloaded files

  - by T. Webster

  I have Windows XP SP3 and every file I download is automatically encrypted no matter what directory I save the downloaded file in. So it's not as simple as turning off encryption of any specific directory, the file will be downloaded as encrypted regardless of whether the directory is encrypted or not. Is there a policy or registry setting somewhere to disable this automatic encryption? (EDIT: I doubt it's malware since this OS was just installed on this machine. It's my work PC and by default I think there's some group policy or other setting which not only sets everything in My Documents to encrypted, but also everything I download, no matter where it's downloaded to. )

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• How badly do SSDs degrade without TRIM?

  - by joev

  SSDs have been out for a few years, and have seen all kinds of usage patterns. Windows and Linux support the TRIM command, with Mac OS still trailing behind here. Update (2 Aug 2011): It appears OSX Lion has support for TRIM in Apple-branded SSDs. There is a utility that enables TRIM in non-Apple SSDs I'm sure plenty of Mac users (and pre-TRIM version of Win/Linux) have SSDs. So, to you folks: have you noticed a degradation of SSD performance during its lifetime? How long have you been using the SSD, and how bad is the degradation? I'm assuming that even at its most degraded state, a modern SSD would still smoke a traditional hard drive in terms of performance.

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• First Linux - Ubuntu - should I change anything right away?

  - by Cyrcle

  I'm going to be getting a new system next week. I'm finally going to take the leap and run Linux as the native OS on it. Seems like a standard install of Ubuntu is the way to go for a newbie. I'm planning on 10.04 LTS. Is there anything that I should change right away that will cause me problems down the road? I'll be using this system for web development, mainly programming PHP. I'll be using my old laptop for testing with IE and Safari, at least until I either use Wine or VirtualBox to run them on the new machine. I think I'm going to force myself to learn Vim while I'm at it.

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• Librated error when creating partition table

  - by Marko

  I bought a Dell Inspiron 5521 laptop a few days ago that came with Ubuntu preinstalled. I haven't used Ubuntu yet, and I don't have any experience in using it. I wanted to install Windows 7 64-bit on my laptop alongside Ubuntu, and made two bootable USB drives with Gparted and Windows 7. There wasn't a suitable partition on my laptop in which I could install Windows 7. I've read the instructions for using Gparted to create or manage my hard drive. I inserted the USB, booted from BIOS, and followed the procedure in installing Gparted. Then I entered Gparted, and the following error occurred: Librated error when Creating partition table. It asked me to click on either OK or Cancel. Either way I had my hard disk shown to me in the user window, in partitions that were made by the manufacturer: Partition File sys Label Size Flags /dev/sda1 fat32 dellutility 300.00 Mib diag /dev/sda2 fat32 os 3.00 Gib lba /dev/sda3 ext4 912.46 Gib boot /dev/sda4 extended 15.75 Gib (had a subpart) /dev/sda5 linux-swap 15.75 Gib ...and a option to switch to dev/sdb that's unused and of capacity 3Gib. I've used the biggest partition 912.46 Gib, and tried to reduce its size, and clicked OK. Then when I tried to make a new partition, it said it can't make any more partitions, no more than a maximum of 5. I would like to keep Ubuntu and slowly learn, but I also need to use programs that work in Windows. Thank you for taking the time to answer my question.

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• Dell Inspiron7520 and ubntu 12.04 issues

  - by user91358

  I have a DELL Inspiron 7520 in the highest configuration: 3rd Generation Intel® Core™ i7-3612QM processor (6M Cache, up to 3.1 GHz) 15.6" Full High Definition (1080p) LED Display 8GB3 Dual Channel DDR3 SDRAM at 1600MHz 1TB 5400RPM SATA HDD + 32GB mSATA SSD w/Intel Smart Response Blu-ray Disc (BD) Combo (Reads BD and Writes to DVD/CD) AMD Radeon™ HD 7730M 2GB 6.09 lbs and I have installed Ubuntu 12.04 few days ago and I'm facing some issues: 1) sometimes the whole ntb freezes and I have to hold power button for 5 secs to shut it down. I think it is something with VGA and connected external monitor. I have read somewhere that it is already a reported bug, but what I am not sure about that it is doing sporadically. Sometimes it freezes right after I log in, sometime I ran few hours and then it freezes. I am using those proprietary drivers but I wasn't been able to install those with updates. 2) the next issue is the fan is quite noisy even when the ntb is almost Idle. (max 10% CPU usage). Can you recommend me some software which could do this power management to lower the noise? I have tried CPU frequency scaling indicator, but it seems that it has not any effects. 3) and issue no. 3: when I want to log out, restart or shutdown using the menu in upper right corner the upper and left trays disappear, but programs are still running and they won't close to complete log out or shutting down the OS. When I use the CLI command, it works fine. Thanks for any help you can provide.

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• Context switches much slower in new linux kernels

  - by Michael Goldshteyn

  We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe. Let me be more specific about the test. We have a program that has two threads. The first thread gets the current time (in ticks using RDTSC) and then signals a condition variable once a second. The second thread waits on the condition variable and wakes up when it is signaled. It then gets the current time (in ticks using RDTSC). The difference between the time in the second thread and the time in the first thread is computed and displayed on the console. After this the second thread waits on the condition variable once more. So, we get a thread to thread signaling latency measurement once a second as a result. In linux 2.6.32, this latency is somewhere on the order of 2.8-3.5 us, which is reasonable. In linux 3.2.0, this latency is somewhere on the order of 40-100 us. I have excluded any differences in hardware between the two host hosts. They run on identical hardware (dual socket X5687 {Westmere-EP} processors running at 3.6 GHz with hyperthreading, speedstep and all C states turned off). We are changing the affinity to run both threads on physical cores of the same socket (i.e., the first thread is run on Core 0 and the second thread is run on Core 1), so there is no bouncing of threads on cores or bouncing/communication between sockets. The only difference between the two hosts is that one is running Ubuntu 10.04 LTS with kernel 2.6.32-28 (the fast context switch box) and the other is running the latest Ubuntu 12.04 LTS with kernel 3.2.0-23 (the slow context switch box). Have there been any changes in the kernel that could account for this ridiculous slow down in how long it takes for a thread to be scheduled to run?

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• < key triggers sticky alt on Windows 7

  - by Xoundboy

  When using a code editor like Notepad++ or Eclipse I'm experiencing a rather annoying problem: each time I type the < key the keyboard latches into some unexpected mode whereby the subsequent keypress behaves as if the alt key were being held down. The only way to return to normal mode is to hit the escape key twice immediately after I type a < character. The keyboard is a Microsoft Comfort Curve 2000 and the OS is Windows 7. Does anyone have any idea what I should do to stop this behaviour? Thanks

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• Default Program With Multiple Versions Installed

  - by Optimal Solutions

  I have multiple versions of Excel installed. Excel 2010, 2007 and 2003. I have them installed on one hard drive with Windows 7 Ultimate as the OS. When I double-click on an XLS file, Excel 2007 opens. I would like Excel 2010 to open. I read and followed the instructions to go to the Control Panel at "Control Panel\All Control Panel Items\Default Programs" and set the default programs. I changed the default to the physical EXE for Excel 2010 at the proper folder that it is installed. When I double-click on the XLS files, Excel 2007 still opens. So I tried to change it to Excel 2003 just to see if it changed to that and it still opens Excel 2007. What am I missing? I would really like the file extension to open Excel 2010, but can not seem to do that.

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• Remote HTTP to FTP

  - by jamd12

  I am on a very slow download with the internet that I have and unfortunately I only have access to expensive and slow wireless or satelite. I have set up an FTP with a computer supplier locally who has a nice 2 Mbps speed and am trying to set up a way of adding links remotely (Hotfile, rapidshare, Fileserve, etc.) so that they can be downloaded onto the FTP and then transfered a few times a week manually onto a portable HDD. On my home PC I use Internet download manager for all my downloads. Is there a simple way that I can add links remotely to Internet Download Manager on the FTP or perhaps another solution? The OS on the FTP is Linux - I use Windows XP SP3 and Windows 7. I have not used FTP very much before so any suggestions on how best to do this would be much appreciated.

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• Where to find information about ubuntu compatible or certified hardware/PC models

  - by Halkinn

  I am buying a new desktop PC in early 2013, anyway this question should apply to someone intending to buy a new laptop/ultrabook as well. This machine is not meant for gaming, and if I ocasionally do it, I can survive with minimum graphics. However I may need some heavy multimedia edition or multitasking at times, so basically my greatest priority is a good processor, after that perhaps average graphic card (if onboards are not enough, I am still not informed enough about that), at least 4GB of RAM with possibility of expansion. I know there are some PC models specially designed to ship with Ubuntu, which is the OS I use the most these days. However, most people around me use Windows and some software with unsupported versions for Linux and not having a Windows license becomes a bit problematic. Given that, I would like to find information about which PC models or even manufacters currently on the market have the best compatibility with Ubuntu, I am still undecided between building my own desktop or buying a pre-made model, so I would like to find information both for certified models and certified hardware or even Ubuntu partners that may work closely with Canonical. Where to find this information in order to make sure that I will have a good experience with Ubuntu on my new PC in the years to come?

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• Is there a way for one SSH config file to include another one?

  - by Joe Casadonte

  In case it matters: OS: Ubuntu 10.04 SSH: OpenSSH_5.3p1 Debian-3ubuntu5 I'd like one SSH config file to include another one. The use case would be to define whatever I want in my default .ssh/config file and then pre-pend a couple of extra things in a separate file (e.g. ~/.ssh/foo.config). I want the second file to incorporate the first one, though, so I don't have to duplicate everything in the first one. Is that doable? Thanks!

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• Setting up a network between a host and guest virtual machine

  - by anonymous

  (I'm running ubuntu server 12.04 on virtual box) I'm trying to transfer a file (scp) from my laptop to one of the directories of a virtual machine. I tried sharing folders, but that failed. I'm a bit of a networking newbie. I've looked at like 20-30 pages. Here's one: http://www.howtoforge.com/moving-files-between-linux-systems-with-scp I followed those steps exactly. My problem is that when I try using scp, it just hangs. I'm also not sure which network interface to configure (eth0, eth1?) in the guest OS. Another (significant?) detail is that the inet address of eth0 is 10.0.2.15 instead of something like 192.168.x.y. I've enabled the bridge adapter and the host-only adapter. Both the laptop and guest VM have openssh-server installed. I'm not sure what to do at this point. Is there a better place to ask about this?

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• How do I image my hard drive for backup? Or do I just need to backup the files?

  - by NoCatharsis

  I have never imaged a hard drive, so I don't know what software to use or how to prepare my system for imaging. Is this the best way to backup? In the past, I've always just kept a copy of my important files on an external drive and in Gmail or DropBox for smaller stuff, but it would be nice to just take one image and restore from that if something ever goes wrong. Thanks for the help. EDIT: I'm sorry, I forgot to mention the OS. I would like to do this for my home and work computers, which are Vista and XP respectively. And actually I'm about to upgrade to Windows 7 at home, so details on that would be appreciated too.

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• Long domain lookup on .dev domain inside vmware

  - by skelle

  I'm developing on my macbook and normally I have a local running webserver which just works finde. Now I have to use a vmware image where the webserver is running. I set up everything and my dev site is running under site.dev inside vmware. I can connect to the webserver but EVERY request takes a very long time. I already red that this is related with iIPv6 and the way OSX handles /etc/hosts. There I added 192.168.155.42 site.dev and I already did this (Resolving to virtual host very slow on Mac OS X Lion) but my lookup still takes ~30seconds on every request. What can I do to fix this issue?

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• Boot Loop contiues [closed]

  - by user1894750

  I am facing boot loop. My backend Linux works flawlessly, But the Zygote and System server does not workout. I can still use ADB and LIVE cat .. ps show that both Zygote and system_server process are there, But boot animation remains forever !! I have : 1 Wiped Data + Cache Partition 2 System Partition has been RESTORED.. There is NO PERMISSION problem... I think that there is *problem with Zygote and System_server ..* my device: Karbonn A9+ Dual Core Snap Dragon 1.2 Ghz Ram 386MB OS : ICS 4.04 Any suggestions ??

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• Microsoft mouse screws up my power settings

  - by Patriot

  Running a new computer with Windows 7 and 64-bit OS. Had a wireless Logitech mouse that worked perfectly with this set up. The mouse was old, and the buttons were sticking and causing double clicks, so I bought a new Microsoft Mobile Wireless 3000 mouse to replace it. The new mouse works perfectly, but now my screen saver is disabled and my computer won't go into sleep mode after 15 minutes as per my power setting. If I hook the Logitech mouse back up, screen saver works fine and computer goes to sleep as it should. Am I missing something, or is Microsoft's mouse just junk. Got no software with the new mouse, so no drivers seem available.

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• How can I use the Band Pass Filter in GarageBand?

  - by Another Registered User

  What I want to do: I have a music WAV file and want to put a Band Pass Filter over it, to filter out anoying high frequencies. I was reading on the net that there is a "AuBandPass" plugin in Mac OS X. I just can't figure out how I could use that in GarageBand. I don't even find the effects at all. I created a new GarageBand file and dropped the WAV file in there. Now I can play that song in GarageBand. What must I do next?

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• How to 'move' mail from Inbox to custom mail folder? (Mac Mail client + Gmail account)

  - by user27779

  I'm using Mail on Mac OS X with Gmail account. I can make a new mailbox folder, and mails can be dragged into there. But, the mails still remain in Inbox. It did not moved. It just copied. (well, it's 'label' feature of Gmail, I know.) This makes crazy. I can't separate mails for each purpose. Is there any way to make Mail application 'move' mails into my custom box (remove from Inbox)?

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• What are these completely random images that pop up when using Recuva?

  - by Qubert

  I just used Recuva to get back some photos I accidentally deleted on C:, but I also noticed there's a bunch of COMPLETELY random images in the list of recoverable files I can choose from. An example would be, There are images with names like John_Doe.jpg with a file path somewhere out of C:/Windows/Assembly/ And some of these things don't even make sense, there's one called componentsSpriteImage with the path C:/?/Images that shows a "poster" from the TV series Gold Rush. I am completely lost on this.. I know the OS is on C:, but I can't really think of a reason why Microsoft would leave a image hanging around from Gold Rush.

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• How to setup IP alias on bridged interface in Ubuntu

  - by Anonymouslemming

  How do I setup an IP alias on a bridge (br0) device on Ubuntu ? If I wait for br0 to come up and then do /sbin/ifconfig br0:0 192.168.10.1 netmask 255.255.255.0 then it works fine. If however I add the following to my /etc/network/interfaces file, it does not work and the network fails to start: auto br0:0 iface br0:0 inet static address 192.168.10.1 netmask 255.255.255.0 At the moment, I have a script in /etc/network/if-up.d/bridge_alias that does this as follows: #!/bin/bash if [ "${LOGICAL}" == "br0" ] && [ "${PHASE}" = "post-up" ]; then echo -n "Starting br0:0 ... " /sbin/ifconfig br0:0 192.168.10.2 netmask 255.255.255.0 echo "Done!" fi What is the right way of doing this though, just using the OS network config files ?

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• Windows Security popup window pops up each time any connection is made

  - by MC Emperor

  I have a problem with the Windows Security popup below. It pops up every time the system tries to make connection with any internet source. It's very annoying, and I don't know how to resolve the problem. (The popup window below is in Dutch, but says something like Connect to somedomain.com. Then it expects you to give your credentials.) I am running on a Windows 7 x64 OS. Now how do I solve this problem? Is it a Windows Firewall problem?

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• Straight-forward to Virtualise with XEN or KVM on IBM Server System x3650 M4 791562G?

  - by ChrisZZ

  I want to built a virtualised Server Environment using XEN or KVM. The virtual machines should be purely debian systems - so XEN or KVM should be a sane choice. Now while buying servers, I am confronted with the fact, that the vendors obviously only support commercial solution. I think, on a good server, one should be able to install uncommercial software as well - but of course sometimes systems have hardware, that requires drivers, that are not found in the OS Community. So I am asked the question: Is it straight-forward to use Debian with IBM Server System x3650 M4 791562G with Debian - or even virtualising the IBM Server System x3650 M4 791562G using XEN or KVM. I am sure there will always be a way to achieve this goal - but this way might have a high milage - so I am not asking, whether this is theoretical possible, but whether this should be straight-forward and practically easy to do, no major headaches to be expected.

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• Lubuntu 12.10: Icon Display Problems

  - by SlcBullseye

  First off, I would like to let you know that I am new to Linux. I finally decided to give it a try and my first project was installing Lubuntu on an old PC and using it for a media server for my PS3. So, one thing that I noticed right away is that my icons for applications, files, folders, etc...are not visible. If I move my mouse over the name of the application or file (It only works if I move the mouse up from the bottom of the name) then the icon will appear, but if I move my mouse back over any other place on the file the icon will disappear again. Also, if I open a folder sometimes an icon or two will be displayed but the rest won't, and like I said before if I move my mouse over the top of the application or file the icon will disappear. Is there any way to fix this? Is this normal? Or could it be a problem with my hardware? I never had this issue when I was running the last OS (Windows XP). Any help would be greatly appreciated. Remember, I am new to Linux so a thorough explanation would be helpful. Also, if there are any tips, tricks, references, or recommendations any of you have to help me jump in and become more familiar with using Linux that would be great! I'm very interested in taking advantage of the power Linux has. Currently I am studying computer programming so maybe one day I will be able to develop my own Linux distribution.

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• Detach Disk from deleted virtual machine

  - by user1628043

  I had an Virtual Machine running in Azure for a couple of weeks and suddenly it stopped responding. I shut it down and tried to restart it but that failed saying the VM faulted. I then deleted the VM which leaves the VHD file intact on my storage account. I was intending to try recreating a new VM using thie VHD from the first VM however, the OS disk and Data disk are both still marked as being attached to the original VM which no longer exists. Is there any way to detach these disks so I can use them to create a new VM?

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