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• Software RAID 10 on Linux

  - by vpetersson

  For a long time, I've been thinking about switching to RAID 10 on a few servers. Now that Ubuntu 10.04 LTS is live, it's time for an upgrade. The servers I'm using are HP Proliant ML115 (very good value). It has four internal 3.5" slots. I'm currently using one drive for the system and a RAID5 array (software) for the remaining three disks. The problem is that this creates a single-point-of-failure on the boot drive. Hence I'd like to switch to a RAID10 array, as it would give me both better I/O performance and more reliability. The problem is only that good controller cards that supports RAID10 (such as 3Ware) cost almost as much as the server itself. Moreover software-RAID10 does not seem to work very well with Grub. What is your advice? Should I just keep running RAID5? Have anyone been able to successfully install a software RAID10 without boot issues?

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• Unable to call through asterisk

  - by sk

  I want to create a voip service. I have installed asterisk-1.4 on a dedicated remotely hosted debian lenny distro. I made a sip.conf and extensions.conf so as to place a call between two sip phones(i am using xlite 3.0) installed in some other Windows PC. Whenever i switch this phones the asterisk console shows that Registration from '"1000"<sip:[email protected]>' failed for '122.168.10.254' - Peer is not supposed to register Where xx.xx.xx.xx is the server's IP. i.e my sip phones are unable to register with the asterisk server. Please help me to place call between two sip phones #sip show peers Name/username Host Dyn Nat ACL Port Status 2000 (Unspecified) D 0 Unmonitored 1000 (Unspecified) D 0 Unmonitored 2 sip peers [Monitored: 0 online, 0 offline Unmonitored: 0 online, 2 offline] # sip show registry Host Username Refresh State Reg.Time # sip show channels Peer User/ANR Call ID Seq (Tx/Rx) Format Hold Last Message 0 active SIP channels

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• XFS and loss of data when power goes down

  - by culebrón

  Each time electricity goes down, my desktop (without UPS) loses some temporary information. Opera can lose settings, history, cache, or mail accounts (Thanks heavens I was wise to use IMAP). Partially or all together. a whole file (complete and save) in Geany appeared empty (and I didn't commit it to Git) rhythmbox lost all podcasts subscription data I'm afraid there are other losses I just didn't see. What's the reason? A memory files cache, a mem-disk? Or non-atomic file writes in xfs? I have Ubuntu 9.10 and XFS on both / and /home partitions. Is ext4 safer in such circumstances? I've seen ext3 is faster. Is it as safe as *4? Given that the apartment I rent is connected to a common bus and 1 safety switch for several apartments, and the neighbors - alone or together - overload it at least once every week, the lights go down often enough for this to be an issue.

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• FortiGate firewall configuration with /30 and /28 networks

  - by slyderc

  I have fiber coming in from a new ISP which is being handed off via Ethernet on a single physical port. I'm having doubts about how to approach the configuration on my FortiGate 200A firewall because I've been given a /30 containing the ISP's gateway and another /28 for external IPs I can use: x.y.76.12/30 (.13 is the GW) x.y.76.64/28 (public IP space) How do I configure the FG200A's WAN1 interface to be aware of the two networks? As I only have one physical ISP port, will I need to plug it into a switch to break-out two cables and use a DMZ port on the FG200A for setting up the /28? Thanks in advance for your insight!

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• Software to manage "application profiles", which services are running, etc., on Windows?

  - by Lasse V. Karlsen

  I am looking for a particular type of program. I use my computers in various "modes", like gaming, programming, just plain surfing, etc. What I'd like to find is a program that can help me manage these modes. For instance, while programming I might use SQL Server, but while gaming I don't want those services running, but perhaps I'd like Steam to run instead. Basically, the program type I'm looking for is a visual program that allow me to quickly switch modes, and when I do, the program would start and stop the necessary services and applications in order to leave one mode and enter another. I've looked at the programs related to startup management, and I haven't found one that lets me do what I want. At the moment I have batch files, but they're not very good at conveying problems or other things, I'd like a more visual program.

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• Changing default shortcut for Spaces on a Macbook Pro with Snow Leapord?

  - by Mahmoud Abdelkader

  I'm primarily a Linux user but my main home PC is a Macbook Pro with Snow Leopard. The concept of "Spaces" in a Mac is extremely important to how I utilize my development environments and I use this feature on Linux all the time. I use Compiz Manager for Ubuntu which allows me to "Desktop Switch" and navigate all desktops using the Ctrl+Alt+Arrow keys to a particular desktop. On a Mac, the process is similar, however, you're only given 3 non-customizable short-cuts: Option+Arrow, Ctrl+Arrow, and Alt+Arrow. How can I change the keyboard shortcut to take Ctrl+Option? The keys would then fit my working style and it won't feel awkward to remember two sets of keyboard shortcuts. Thanks! Mahmoud

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• Why my laptop doesnt boot in any OS (windows or ubuntu) after RAM upgrade?

  - by qrsq

  My laptop previously had 2 slots of RAM ( 1x1Gb , 1x2GB , both were clocked at 1066mhz) and it was working on windows 7 x86 OS. I Upgraded the ram with ( 2x4GB clcoked at 1333mhz). Bios displayed 8192MB of memory and windows was working ok but (only 2.99GB of ram from 8gb was avabile). So i decided to switch to an x64 system to be able to use all the amount of memory. But the laptop wasnt able to install any os (windows 7 x64 or windows 8 x64) so i placed the 3gb of ram instead of 8gb. Then i succesfully instaled an x64 os (windows 8). After than i placed the 8gb ram back again. Now the computer doesnt boot in the os but bios is working normally. I tried also to install ubuntu , without any succes. What should i do ?? All the help will be appreciated. thanks

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• In Ubuntu, how do I change my default Greek font?

  - by Matthew

  I'm taking a course in ancient Greek, and I store notes and flash cards on my computer. However, by default Ubuntu uses a modern Greek font. This changes some noticable things--for example, a circumflex is ? instead of a?. I can type the circumflex by switching back to english and entering the unicode combining character u0311 (which is what I just did to type the second a), but obviously this is very cumbersome. I've installed the "ttf-linex" package from the Ubuntu repositories, which claims to include an ancient Greek font. But I have no idea how to enable this font for whenever I switch to the Greek keyboard layout.

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• Google Mail: Import labels when switching from POP3 to IMAP

  - by toobb

  My situation is the following: I have a Google Mail email-address and I have been using this address in Thunderbird fetching the emails with POP3 (the emails also remained on the server and where "archived"). In Thunderbird I organized my emails in folders. Now I want to switch to IMAP (with the same email address), but I want to keep the folder structure I created in Thunderbird. I could create a 2nd account in Thunderbird that uses IMAP, and then move my folders from the old account to the new one. But the problem is, that Google Mail probably does not recognize that it already has these moved emails in "All Mails". I will probably end up with two copies of every email. Does someone has good idea how to deal with that problem? Thank you!

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• Fedora 17 - Can't access remote machine using hostname

  - by Aaron

  I am using Fedora 17 and am trying to access a remote machine (running Fedora 15) using its hostname which isn't working. The machine is right next to me on the same switch as my machine (so they are both on the same network with the same subnet and everything). When I was running Windows (7 32-bit) on my machine I could access the other machine no problem but now that I am running Fedora 17 that's not the case. Is there an additional daemon or something that I need to be using in order for this to work?

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• Large Users Profile - Windows 7 - Machine running slowly

  - by Richard

  I have the MD of a client of ours who has a Windows 7 Profile that is currently 14GB thanks to Videos/Music and Documents. The first thing we did was to switch from roaming to local. What I need to know is now the profile is local am I wasting my time by reducing it any further? Does it really make a difference to performance having a large local user profile? Only the 4GB outlook ost that talks to the network frequently. Thanks in advance.... Richard

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• TrueCrypt Failing to Decrypt External Hard Drive after changing Enclosures

  - by Anx Ara

  I have a 4TB external hard drive that was previously encrypted using TrueCrypt. The power source on the hard drive enclosure failed, so I had to switch the hard drive itself into a new enclosure. I can no longer decrypt the hard drive using TrueCrypt, as it says my password is wrong. I am certain that I entering the correct password. Additionally, in TrueCrypt, when I try to mount the volume under "Select Device", it shows the following: Harddisk 5: 3.6TB Device\Harddisk5\Partition 1 H: 465GB Whereas before I changed the enclosure it would show: Harddisk 5: 3.6TB Device\Harddisk5\Partition 1 H: 3.6TB I am on a Windows 8 PC and using TrueCrypt 7.1a. How can I get it to decrypt properly?

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• Need assistance setting up Linux Router with 2 public lans

  - by user195407

  I was assigned a.b.c.10/30 (Public IP) for my router and given a.b.c.9 as the gateway. I was also assigned x.y.z.128/25 (Public IP block) for my use. I want to setup a Linux router to handle this situation. My Linux box has 3 NICs, eth0 is a.b.c.10, eth1 I have assigned x.y.z.254, eth2 is unused at present. I have eth1 connected to a network switch, and several devices connected. Let's say box A is x.y.z.129 with a gateway of x.y.z.254. I have not connected to the network yet, as it is not live. What settings do I need to make, beyond adding the 2 network definitions to the cards and having "route add default gw a.b.c.9 eth0"? I may add a private 192.168.100.0/24 lan to eth2 later.

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• Bash: Variable substitution in variable name with default value

  - by krissi

  i have the following variables: # config file MYVAR_DEFAULT=123 MYVAR_FOO=456 #MYVAR_BAR unset # program USER_INPUT=FOO TARGET_VAR=<need to be set> If the USER_INPUT is "foo", I want TARGET_VAR to be the value of MYVAR_FOO (TARGET_VAR=456). If USER_INPUT is "bar" I want TARGET_VAR to be set to MYVAR_DEFAULT (123), because MYVAR_BAR is unset. I prefer it to be sh-compatible and as a substitution string. But it might also be bash compatible and/or in a function. I got these snippets: # Default values for variable (sh-compatible) echo ${MYVAR_FOO-$MYVAR_DEFAULT} # Uppercase (bash compatible) echo ${USER_INPUT^^} I would need something like this: TARGET_VAR="${MYVAR_${USER_INPUT^^}-$MYVAR_DEFAULT}" # or somecommand -foo "${MYVAR_${USER_INPUT^^}-$MYVAR_DEFAULT}" This is to switch a bunch of variables between multiple "profiles". In the example, FOO and BAR are profiles. New profiles should be added easily, in this example there would be an implicit profile named BAZ, too, all variables to their default values. Unfortunately it is not that easy. Do you have an idea to solve this? Thanks in advance, krissi

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• Autonegotiate errors between HP and Cisco hardware?

  - by Satanicpuppy

  This is a bit of a specific extension to this question. I've got two ASA's that feed into a Procurve switch, and then into an IPS. All is well except that the procurve absolutely refuses to autonegotiate with the ASA's...The asa's run 100full, and the procurve autonegotiates to 100half. It does it for both ASA's, so it's probably not a failure on one of them, and everything works fine if I force the procurve to 100full. Has anyone else seen this issue? I've been buying more HP hardware, but I'm not keen on getting equipment that's not going to play nice with my Cisco backbone.

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• OSX Keyboard Shortcuts in Dialogs?

  - by Dan Fabulich

  On Windows, every dialog box includes underlined letters that you can activate using the Alt key. I use these "Alt" keyboard shortcuts all the time; I'm missing them as I'm trying to switch to OSX. On OSX, all I can find is Tab navigation, which requires you to press Tab seven or eight times to get anywhere in most dialog boxes. (And even that is hidden by default: you have to enable "Full keyboard access" in the "Keyboard & Mouse" control panel to be able to Tab between buttons.) Is there some way I can get something like the Windows Alt accelerators for OSX dialogs? I'm willing to write Automator code, download/purchase software, etc. Specifically, I'm imagining maybe something where you do some shortcut command and then start typing the name of the button, and hit Enter to push the button...?

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• When did Red Hat start shipping PHP 5.3 with 5.x?!?

  - by Jason

  Okay this is a PSA more than a question because I know the answer: January 13, 2011. See: https://rhn.redhat.com/errata/RHEA-2011-0069.html Colour me surprised though, didn't hear anything about in the blogosphere until I got a Security Errata notice today. I have been using the REMI repo for this in the past but will switch over to the Red Hat blessed PHP 5.3. Don't down-vote me bro! I'll select as the best answer the source that broke the news first (other than Red Hat of course). People have wanted this for so long I'm just amazed that it's finally happened!

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• Which dbghelp.dll do I use for debugging?

  - by Coldblackice

  I'm trying to configure symbols in Process Explorer. I have the Windows SDK installed (and thus, Debugging Tools). However, there are two versions of dbghelp.dll -- x86 and x64. Which one do I use? Other sources on the net say to just point to the dbghelp.dll that's in the base directory of the Debugging Tools. But there's no such dbghelp.dll -- they're in their respect 32 and 64 bit folders (i.e., C:\Program Files (x86)\Windows Kits\8.0\Debuggers\x64). I'm using a Windows 7 x64 operating system, so does that mean I should load the x64 .dll? Or is it a matter of what I'm debugging? If it is a matter of what I'm debugging, does that mean that I have to switch this .dll depending what process I want to get symbol information on in Process Explorer?

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• OS X Money Management Software

  - by Ryan O

  I recently moved from Windows to a Mac, but I still have to keep Virtualbox and Windows installation on the machine to use Quicken. iBank looked promising, but I had problems importing my data from Quicken. I would switch to Mint if they would allow you to enter transactions manually, but the lack of that feature is a deal breaker. (I use Quicken primarily to track uncleared transactions, with the bonus of reporting on past spending.) Is there any other software I should try that will be able to import at least most of my old data from Quicken? Edit: For what it's worth, I never did find anything else. Quicken Essentials for Mac was released this year, but doesn't handle investments well from what I hear. I'm now on Quicken 2010 under XP running inside Virtualbox. It's not ideal, but it seems to be the only thing around right now that meets my needs.

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• File Saving Sometimes Fails

  - by YellPika

  When I attempt to save files, it sometimes (randomly) fails. In Blender, I sometimes get "Version Backup Failed: File Saved With @". In Visual Studio, building sometimes fails with an error message indicating that the target file/exe cannot be overwritten. If I wait a bit, I can save fine. It's almost as if programs are taking an abnormal amount of time to 'let go' of the files. What could be causing this behaviour? This seems to be caused by Windows Live Mesh monitoring my files, and locking them whenever it uploads the new versions (BAD considering the amount of times I save my files, even redundantly). Any suggestions to work around this behaviour? Should I switch to a better service to sync my files?

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• Windows 2008 R2 server cannot access shares on other servers

  - by Rob

  I have a problem on my new 2008 R2 64-bit server. Essentially the server sometimes refuses to access shares on other server. in the format \\servernam\sharename sometime it works and then for a few hours it doesn't and then at randon it comes back online. This is a local AD network and have even put in a new gigabit switch between all server. All the old 2003 servers work fine so I know DNS and WINS is all ok. I get error 1006 in eventlog saying that my R2 server can't contact the domain controller when it clearly can. Just to add to the config, it is running on a Dell PowerEdge R410, Vmware Esxi 4.0 and R2 is configured as a terminal server. I can always view shares with FQDN This morning net view \\ did not work but net view \\ did. Very random and very frustrating. any ideas? thanks

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• Debian based OS: Show system notification on clipboard copy/paste events

  - by ifischer

  When working with Linux (Debian based), I often experience problems in relation to the copy paste commands: I copy something with Ctrl+C or by selecting it with the mouse, but when I try to paste it somewhere else, the clipboard is empty and nothing happens - whatever reason caused this. This annoys me, as I have to switch to the source application again and again copy the text. So to really be sure if something was copied into the clipboard I would like it if the window manager (be it Gnome, KDE, etc) would show a Desktop Notification (for example powered by libnotify) as soon as anything is copied into the clipboard, showing the content that has been copied into the clipboard. Is that possible by using one of the many clipboard managers out there (glippy, clipit, ...)? If not, can I write a (DBus?)-hook, which is triggered during copy-to-clipboard-actions, showing the content which is to copy inside the Desktop Notification? (The latter approach would be more interesting, since I'm interested in hooking into system events in general)

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• What could cause my LAN Pings be greater than 100ms?

  - by James Holland

  I have 2 servers (Both: Windows Server 2008, Dual Xeon 2.8Ghz, 32GB RAM, 8 x 15k SAS Drives). One of them is a DC / Web server / Exchange Server, the other is a SQL Server (2008). I have a 48 port Netgear GS748T Gigabit switch. When I ping from server to server, I get ping times <1ms, great, but when I ping from a PC, I get varying pings from the occasional <1ms to 500ms!! If I log into either server and look at Task Manager, CPU usage peaks at 20%, memory usage is 100%, but I am led to believe this is normal as Exchange will just use as much as you have, and release it when requested. Network usage peaks at 1%. I really don't understand how the ping can vary that much. I know I am giving very little info, but this is all I know, I apologise, but can anyone help? In response to question, I have pinged by both IP address and hostname, no difference in ping times.

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• Linux HA - Best Heartbeat hardware solution

  - by Martino Dino

  Hi all I would ask anyone what is the best layer 2 medium for heartbeat in Linux and how it's best configured. More precisely I've been thinking about a dedicated NIC for that purpose but then i thought that if a switch breaks then i would loose the heartbeat connection for most of the cluster and STONITH 'BUM'!!! Will probably loose my job after :) Distributing the heartbeat onto the main NICs of every node trough a vif sounds reasonable but im not sure if this is the best option (at least the switches are redundant to some extent). Is it possible to use heartbeat over a bonded interface and that sounds reasonable? Do you have any other tip/solution for that issue?

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• Western Digital My Book World drops off network

  - by Macha

  Most of my storage in my house relies on a WD My Book World Edition 500GB network drive. I threw out the vendor crapware they give you to access it (a trial version of Mionet) after it starting nagging me to upgrade, and set it up as a standard network drive using Window's Map Network Drive. However, since then, it has been dropping off the network after 30 minutes of non-usage. The only way to get it back on is to switch it off and on again at the plug socket. Does anyone know what is causing this, and hopefully how to fix it? EDIT: it's the original "blue rings" version with the latest firmware.

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