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• MongoDB -what's the safest and most efficient way to change from Master-Slave to ReplicaSet?

  - by SecondThought

  I now have two mongo servers with a Master-Slave configuration (all read-writes are done with the Master, the Slave is just a cold backup) serving a pretty demanding web app. I want to switch to ReplicaSet of 3 servers - I have these 3 already configured and working (still not connected to the web app). Just wondering what's the most efficient way (shortest down-time required, and lossless transfer of all data) to transfer all the data from the master/slave to the RS.

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• How much data bandwidth can a 3G gsm cell tower can support?

  - by Karim

  I was always wondering how many simultaneous users can a 3G tower supports with its data rates? I mean they advertise 28.8Mb/Sec for the 3G Data but in reality if a lot of people use it say 10 , it wont give 288Mb/Sec bandwidth. I didn't find anywhere where such information is published so I thought to ask here. Don' know why the cell operators keep it such a secret :)

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• Is my PC slower by using a cheap video card?

  - by Eduardo Molteni

  Since my fancy video card have gone south, I've been using the motherboard integrated one (some Intel with 256mb) I do not really see any difference with the old one. I don't do games or video editing in the PC and now I'm wondering if buying a new video card is a smart choice.

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• Is sshfs+encfs stable ?

  - by dugres

  What is your experience in using ENCFS with SSHFS for remote backup ? My main wondering is about long term stability.

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• Where is the plugins directory for Turnkey Trac?

  - by Tomek

  Hello, I setup a Turnkey Trac virtual machine and am trying to set up the LdapPlugin to use use authentication through a local Active Directory. I tried using easy_install http://trac-hacks.org/svn/ldapplugin/ to install it and it claimed to have completed, however when I go to the Admin page and go to plugins, it is not listed. I have never setup a Turnkey server like this before and was wondering in which directory the Trac plugins are located on the Turnkey-linux machine? Thanks, Tomek

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• Uninstalling a program doesn't remove shortcuts from Start menu

  - by eternalDreamer

  This problem started very recently after a system restore. Each time I uninstall a program, it uninstalls correctly but the shortcuts remain in the Start menu. I can easily delete them by right-clicking on them, but it is an irritant and I was wondering why this is hapenning. I tried changing the permissions on C:\ProgramData\Microsoft\Windows\Start Menu\Programs but it did not help. What else can I try? I am using Windows 7 Home Premium.

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• splitting off an emacs window into a new frame

  - by user38983

  From a frame displaying multiple windows, I'd like to be able to 'break' one of the windows off into another frame, perhaps with a modifier-click on the modeline, where the window would now have its own frame but hold the same buffer and position. I was wondering if this behavior was available somewhere in the standard library, if there was an extension for it, or perhaps if a small elisp function would work.

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• Sleep or Hibernate for a laptop

  - by Tim

  I was wondering whether it is better to put a laptop into sleep or hibernation in Windows 7, and suspend or hibernate in Ubuntu: when carrying the laptop in a backpack and walking or slow-running to another place in around 15 minutes, Or just when the lid is closed. My concerns are if the heat generated and accumulated and bumping from transmit will do harm to the laptop, and I can miss other important factors. Is sleep in Windows 7 same as suspend in Ubuntu? Thanks and regards!

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• nginx: how do I track down a random 500 from nginx (not my application). Potentially has something to do with load?

  - by kaleidomedallion

  We recently had some 500's from nginx itself that somehow were not logged (we have screenshots, but nothing in the logs). That is weird in itself, because usually errors show up there. Regardless, I am wondering if there is something like a connection pool size that if maxed out would result in a 500? We have correlated it potentially to a recent spike in traffic, but it is not conclusive. Anyone have any ideas of how to begin to approach such an issue?

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• Display \n characters as newlines when using tail?

  - by GSto

  I have a file that I am trying to read by using tail -f. I was wondering if there was a way to have the terminal output an actual line break instead of the \n character.

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• Is it possibile to alow port forwarding only for specific IP public addresses

  - by adopilot

  I have freeBSD router and it host public IP address, I am using ipnat.rules to configure port forwarding prom public network inside my private network. Now I wondering can I restrict only specific public IP addresses to can pass trough my port forwarding. What I want is to only my specific public IP addresses can walk inside my network on specific ports. Here is how now look like my ipnat.rules file rdr fxp0 217.199.XXX.XXX/32 port 7900-> 192.168.1.12 port 80 tcp

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• Is it possible to change the voltage on a single port on an HP ProCurve 2910al POE switch and how?

  - by hjoelr

  I have a couple of HP ProCurve 2910al POE+ switches at my company that we are primarily using to power our VOIP phones that run on 48V DC. However, I have one wireless access point that I need to run off of POE, but it has to be 24V DC. I'm afraid to plug it into the POE ProCurve because I'm not sure if it will zap the device. I'm wondering if there is a way to make sure to change the voltage on a specific port to 24V instead of the (seemingly) default value of 48V. Thanks! Joel

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• Log requests in apache upon arrival

  - by Patrick Cornelissen

  Is it possible to log requests in the apache when they arrive not when they have been processed? We have a pretty big web based application and the way it's currently logged is sometimes confusing to read, because each request with it's subrequests is logged "upside down", because apache logs the request after it has been processed, so the initial request is the last entry for this "query". We're wondering if there is a chance to log on arrival?!

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• How can I change the size of my SD card partition on os x 10.6.8 using gparted or disk utility?

  - by user1068636

  I"m running OS X 10.6.8 and I would like to use gparted to resize a partition on my SD card by following instructions on this page: http://mitchtech.net/easy-gui-install-re-partition-raspberry-pi-on-ubuntu/ However, it appears like gparted is suitable only for linux environment. I was wondering what alternatives do I have on os x to achieve increasing the size of the partition on my SD card? Would appreciate all / any advice.

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• How can I get AB repeat functionality on iTunes/Mac OS X?

  - by Jack Chu

  I'm wondering if there's an A-B repeat feature on iTunes, a quick google found nothing, but I was hoping there was a plugin or maybe a separate app that provided this. For me it's useful for learning guitar riffs/solos, but it's also good for people trying to learn another language. Thanks.

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• Create a zip file that doesn't create a folder when opened, Mac OS X

  - by MZimmerman6

  I am wondering if there is any way of easily creating a zip file that contains a bunch of files. However, when I double-click to open this zip file, I do not want it to create a subdirectory with the same name as the zip file, I just want all of the files to be extracted into the directory where the zip files is stored. Is there a certain flag I can add in terminal to do this, or any program that does this. Thanks for your help!

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• Automate Excel Text Import Wizard?

  - by Dave Mackey

  I receive files on occasion in a fixed width format. I need to import them into Excel but Excel doesn't perfectly pick up the columns. I can do it manually each time with the Text Import Wizard, but I'm wondering if there is a way to create a "text import template" or something similar - since these files are always the same format.

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• telephony + exchange 2010 (unified messaging)

  - by Aceth

  ok i am a complete n00b when it comes to telephony ... i was wondering we are beginning to play with exchange 2010 in the office ... How can i connect a telephone line into the server? so we can ring in and get our emails via phone (we have a spare direct line) I'm going to guess it's not as easy as sticking a 56k modem into the server? Cheers

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• How can I run the same Linux Installation on my hardware and in a virtual machine?

  - by LithMaster

  I've started some development that requires Linux (I'm currently on Ubuntu, but I may switch to Debian), but I still use Windows 7 for my day-to-day computing. I have already tried a dual-boot setup, but I've found that it is too cumbersome to switch between Linux and Windows. I'm wondering if it's possible to setup an installation of Linux (again, Ubuntu or Debian) on a partition of my hard drive that I can also run from Windows in a virtualized environment.

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• Good Lambda Probe Alternative

  - by joel_gil

  hello everyone i was just wondering of a good Lambda Probe alternative for monitoring MySQL server with GLassfish The cath is that we dont want just a current monitor but sth that will keep a history since i am going to stress test some servers and i would like sth that outputs the data either in tables or graphic so i can then run some statistical analysis I hope my question was understood, thanks in advanced

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• how to get Incoming and Outgoing hostnames and ports on a linux email server

  - by Tim

  I would like to export my emails from my email account on a linux email server to Gmail. So I was wondering how to get its incoming and outgoing hostnames and ports and get to know if it supports POP3 or IMAP? For example, by some commands that I can run on the server's bash shell? Thanks and regards!

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• certain thumbdrives keep a system from going out of the boot screen

  - by The Journeyman geek

  I have an old r51 which i boot off usb. Apparently, if i have a toshiba 2gb thumbdrive similar to this plugged in, or an old imation 1gb drive plugged in, it won't boot at all- it freezes in the bios loading screen until its unplugged. I need to try it on another system but i'm wondering what could be causing it- since i suppose this is at a lower level than filesystem, and the drives work fine otherwise - even being readable if inserted after the system is booted from another source, with neither drive plugged in

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• Required software for remote Linux distribution

  - by Kartoch

  I'm managing Linux servers for my team. For each new instance, I install the following softwares: etckeeper which keeps tracks of every changes in /etc shorewall to have a simple setup for firewall rsnapshot which keep incremental backup of important directories cron-apt: which take charge of update of the system (or, in my case, send me an email to warn me about new updates) But I was wondering if you administrators have any other wonderful tools for daily management. I'm not talking about remote management (like cfengine) but little tools which help to manage a small number of Linux servers.

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• How "unique" is a Windows Product Key?

  - by Uwe Raabe

  I'm wondering if the Windows Product Key used for activating any Windows since XP is unique to this installation. How do OEM systems and corporate licenses fit into this scheme? Do they use the same product key for several systems or is each one activated with a seperate key?

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• Map reverse-history-search function in bash to a shortcut other than CTRL+R

  - by benjwarner

  I'm using Putty Connection Manager which captures CTRL-R key before it can get to my bash shell. So I was wondering if it is possible to map the reverse-history-search to another shortcut key. Such as CTRL-W or maybe even F1. Any help would be appreciated.

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