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• Dynamically changing one-node Cassandra cluster to two nodes

  - by Jason Axelson

  So I have an application that will be very dormant most of the time but will need high-bursting a few days out of the month. Since we are deploying on EC2 I would like to keep only one Cassandra server up most of the time and then on burst days I want to bring one more server up (with more RAM and CPU than the first) to help serve the load. What is the best way to do this? Should I take a different approach? Some notes about what I plan to do: Bring the node up and repair it immediately After the burst time is over decommission the powerful node Use the always-on server as the seed node My main question is how to get the nodes to share all the data since I want a replication factor of 2 (so both nodes have all the data) but that won't work while there is only one server. Should I bring up 2 extra servers instead of just one?

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• Ultimate way to use Picasa in a home network

  - by luisfarzati

  I've been trying a lot of approaches but still didn't find any effective solution. I want gigs of photos in a network drive (a IOMega Home Media Network Drive, plugged to my wifi router). I'd like to do 2 things: Do a Picasa import process of all the photos in the drive, making Picasa organize all the files in a year/month folder structure physically. Ideally, the import target directory should be the same network drive, otherwise I should move all the imported files in my local computer back to the drive myself. Share the Picasa database over the network, by uploading it to the network drive. Have me and other members of the family point our Picasas to the network database, and see the photos as well as make changes (tag faces, create logical albums, etc) into it. Is ANY possibility to accomplish this? Or should I be looking for another photo management app, and in that case do you know such one? Thank you!

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• Cross-platform centralized desktop password manager

  - by Dave

  I have been using KeePass as a desktop password manager on Windows for many years. Love it! However, I am now needing to work on different platforms much of my day (Windows 7, Windows XP, Mac OS X, Ubuntu, and OpenSUSE.) I'm looking for a password manager I can share across all these platforms. My ideal solution would: Run natively (not in a virtual machine) on all platforms. Store the "official" copy of the password data on a local network so I can get to it from any and all machines. It is OK if it locks (or becomes read-only) when one client is accessing it. Keep a local cached copy (read-only is fine) so I can still get to my passwords when disconnected from the network. Does any such beast exist?

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• Windows backups to VM Esxi

  - by Martyn

  I'm very new to ESXi, so apologies if this is a silly question. I have ESXi 5.1 running running on HP Proliant Microserver with internal LUNs RAIDed with HP P410 Smart Array card. I have 2 Windows Server 2012 VMs running as Domain controllers. These are being backed-up up with GhettoVCB to a dedicated datastore hosted on LUNs on a eSata external device. I have several Windows 8 & 7 PC's connected to this domain. I want to back up these Windows PCs, via the built in backup software, ideally to the external eSata device as well. What do I need to do to have the Windows PC's see the datastore? I assume I could create a VM for FreeNas or something, or share out the datastore via one of the Windows Server 2012 VMs. Both those options seem a little bit of an over kill?

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• Triggering GDM login on a remote machine

  - by creator

  I have to briefly describe the situation. We are planning to make a computer classroom with workstations running Ubuntu 10.04. Since making accounts for each student has not been considered reasonable, we decided to make accounts for each student group. We don't want students to share their passwords between groups so the solution would be not to give them passwords at all, but let the teacher log them in instead. Obviously he shouldn't go from one machine to another typing in credentials by hand, so we need some script that will connect to a remote machine by ssh and make GDM (or probably any other login manager if GDM cannot serve this purpose) log in specified user. I couldn't find any solutions, as well as I haven't noticed anybody in similar situation asking for help, so my question will be: can the scheme described be realized and if yes, then how? Thanks in advance.

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• Are Virtual-Desktop Managers good or bad for system resources?

  - by jasondavis

  I am looking at Virtual-Desktop Managers for Windows 7. Right now it seems that VirtualWin is supposed to be about the best one available for use on Windows. I have never used anything like this though and I am just curious from others experience and knowledge, does something like this hog up a lot of system resources? I do not NEED it but it is a nice feature to have when I do want to use it, my PC's performance is more important then using it. So is virtual esktop managers a resource hog or probably not? Please share any tips/advice/ or comments on them, thank you =)

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• Adding/Removing Users For Permissions in XP

  - by Brian

  Hello, I have some specific folders that I grant members of my team permissions to. So I'll share a specific folder and add them as permissions. But after they are done I usually remove them from the list of permitted users. I was wondering if it's possible to setup a bat file to achieve this, to make my life easier. I was wondering if WMI or powershell has those kinds of capabilities. Just curious. Thanks.

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• Linux distro for acer 4741G laptop

  - by sandundhammikaperera

  Hi all, I need to install linux for my acer 4741 laptop. Anyone who did this before and managed to solve the device driver problems please share your experience with me. I already installed the backtrack linux and I able to make it work the both wireless and wired network connections and also the sound card is also working. But the problem is that I unable to configure 1360x768 resolution of the display. The display looking really flat and ugly under that linux. some help ? can you guide how to correctly configure the /etc/X11/xorg.conf ? --Thanks in advance--

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• centos server shared files

  - by Kyle Hudson

  Hi, I am wanting to implement a multi-server specialised hosting environment. I currently have a cloud solution comprising of 3 centos boxes (2 lamp web servers, 1 mysql). What I am wanting to do is, implement a 5 server solution where they is 3 web servers, 1 mysql box and a fileshare. Basically I want the fileshare to host all the web files for the servers, the caching will remain on the individual servers and the sessions will be stored in mysql. So what I am asking is how do I map the servers to share the same "docroot"? Is it NFS? if so whats the best way about doing this? Thanks in advance.

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• Sharing files between centOS on virtualbox and windows 7 as the host

  - by Wasswa Samuel

  I have centOS 5.5 installed on virtual box it has no GUI so every thing is command based. I want to make a folder in centOS which i can share with my windows 7 host OS such that i can send files to and fro seamlessly. I am new to linux and i managed to install samba. I looked up some tips on net but i ended up getting confused and none of them worked. Can someone explain to me how i can do this in a straight forward way from how i can configure samba to how i can mount the folder such that it can be seen on the host operating system. I am completely lost.please help.

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• Sharing files between multiple computers?

  - by Koalatea

  At my school, we have 13 iMacs that we use to make our yearbook. Currently our school has some servers for us, but since we work with so many files ( thousands of pictures, most of which are ~3MB ) it slows down far too much. Is there a way to better share files between our computers? We are on a wireless network and the whole school shares the same servers, we have around probably 400 computers in the school. Is there a hardware fix I can do? Something like buying an external and hooking only yearbook computers to it?

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• disable everything in update-motd.d dir in ubuntu server

  - by senzacionale

  mitjab@server:/etc/update-motd.d$ dir 00-header 10-help-text 91-release-upgrade 98-fsck-at-reboot 99-footer mitjab@server:/etc/update-motd.d$ i need to remove all auto updates or notifiers in my ubuntu server becouse it is to slow. How can i remove or disable it. Now when i login to server it takes 30s to see server when i write username and passwd. How can i disable all this.. if i run mitjab@server:/etc/update-motd.d$ update-motd --disable /usr/bin/python: can't find '__main__' module in '/usr/share/command-not-found'

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• How can I disable the network detection on Windows 7?

  - by Mad Scientist

  I have a computer running Windows 7 that shares some files on the network. This works fine for a while until for some unknown reason the computer decides that it is connected to a new, unknown public network and disables the file sharing capabilites. Nothing physically changes with the computer, it is still connected to the same network via ethernet cable. But it does misidentify the network every other day, just plugging out the ethernet cable and putting it back in leads Windows to correctly identify the work network and enabling the share again. Is there some way to stop Windows from trying to identify the network automatically, and just tell it that the network on that computer will never change?

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• MySql transfer / update (a bit specific)

  - by Jeff

  before posting I was digging whole site but didn't find help for my problem, so I hope someone will help... Facts: 30 Gb mysql database on remote server (about 20.000.000 rows) data are once weekly updated in local network (mysql) I need to transfer/replace local updated database with remote connection is about 2mb (real mb, not mbps) up/down Point is that I can't have 'down time' of remote mysql server. Until now I Tried: navicat data sync - Ok, but take about 3 days to finish dbForge - ok but need 5 days to finish mysql dump transfer to remote server and execution - about day, but a lot of downtime rsync folder with database /mysql/lib/MY_DATABASE - 4 hours, but after that I need to execute always 'repir on remote server' which takes about 2 hours, and a lot of down time mysql dump piped from cl to directly goto server - still now satisfied many problems I could give you more things that I tried... mysql replication - slow Anyase, what is best,best way to: refresh remote mysql on weekly level and in same time to have 0 sec down time nor huge server load If you have any idea please share

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• Practical way of keeping up-to-date backup servers?

  - by ftkg

  What is the approach generally used when you want to have backup physical servers? Currently I have a Linux server running a database, a samba share, a webapp and some scripts; and a Windows Server, running some third-party software. What I would like was to be able to have a ready backup server to enter in production in case of failure, but how to keep them up-to-date? I've seen some expensive solutions for Windows; for Linux I've wondered if I really have to build an array of scripts.

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• I have to manually enter the pwd when I login at school and when I come back home with my laptop (DELL E6410)

  - by Bong Paduano

  I didn't have to do this the first 3 months of me going to school. My laptop used to be able to connect to my Home WiFi and school Wifi automatically then after the 3rd month something changed and eversince then I literally have to manually enter each of the Wifi passwords in each location each time I try to connect to their respective WLAN. I tried adding each WiFi networks in the "Manage wireless networks" section in the Network and Sharing Center but everytime I login to one of the location, the created network disappears and I did this more than once. I tried restoring the OS back but to no avail. Can someone please assist me on this issue. I'm not sure if this issue has been addressed in this website but I haven't seen any similar question in here. I appreciate any help anyone may be able to share.

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• Sharing RAM resources between 2 or more computers

  - by davee44

  I know there was a somewhat similar question before: How to share CPU or RAM? But, let me just specify it a little more... When Microsoft Windows requires more RAM capacity than available it uses a swap-file to temporarily store the data there, this is actually something like a hard-drive-based RAM. This technology is used for many years. Theoretically, it shouldn't be too hard to implement a similar technology that uses the RAM of different computer(s) in the network for temporary data storage. This just requires a software that runs on computers in the network that accepts and returns data from/to the main computer and keep that data in the RAM; plus the operation system of the main computer must have the ability to use computers in the network instead of (or in addition to) the swap-file. I wonder, are there any implementations of this idea? This would allow users to build RAM clusters using all of their home or office computers, that will boost the performance of a single computer for some development/gaming/video tasks, etc.

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• Windows/Samba connection error

  - by Gomibushi

  I have a Linux fileserver serving up /home for linux and windows users. I was able to connect from my windows client, but not from a DC. Then suddenly I could connect from the DC too. The linux servers run Centrify clients, and as such are part of the domain. All on same subnet. This is what the the log.smbd says, repeatedly: [2010/02/11 11:25:57, 0] lib/util_sock.c:read_data(534) read_data: read failure for 4 bytes to client 192.168.200.3. Error = Connection reset by peer On Windows it appeared as an "unknown error". EDIT: the error code is "0x80004005". We are developing a system depended on the samba share, and are worried this will appear again. It would be nice to pin point the root of this. Any ideas what this might be? Places to look?

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• What is the best way to shutdown hard disk?

  - by Sunil

  Right Now I'm using hdparm command in unix to shut down the hard disk but there are few issues with it. when it wakes back up it consumes lots power. Is there any other way to do it? Many times when I put my hard disk to sleep, I can see few bursts at the beginning and then after a while it goes to sleep. I think its because of the journaling system in ubuntu (which I use) Have anybody encountered that? What would be the best linux/unix operating system (eg: ubuntu/centos/redhat) to work on extensive hard disk operations? I would highly appreciate if you could share the problems you encountered while doing this operation.

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• How to connect another computer to the router

  - by Call Me Dummy

  I already have a Windows 7 PC connected to my NETGEAR WGR614v10 router and I am able to use internet in that computer. Now I need to connect one of my old computer to the router to share the internet. It's also running Windows 7. I already connected it to the router via a CAT-5 cable but I am not able to use internet. The first computer was set up by a technician. Its IP address is 192.168.1.3, and the default gateway is 192.168.1.1. On the second PC, I changed the IPv4 to 192.168.1.4 and default gateway and preferred DNS to 192.168.1.1, but it's not working. What can I do?

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• Accessing SVN Repository on external drive

  - by Stephen

  I've installed SVN on my Raspberry PI and configured it to access the repository on an external hard drive. In /etc/fstab, I've have the following: //192.168.1.12/SHARE/repos /media/repos cifs sec=ntlm,username=Guest,password=,_netdev,dir_mode=0777,file_mode=0777 0 0 This mounts with no issues. When I go to add a project to the repository using the following command: sudo svn import mywebsite/ file://media/repos/mainrepository/mywebsite/ -m "Initial Upload" I get the following error: svn: E170000: Unable to connect to a repository at URL 'file://media/repos/mainrepository/mywebsite' svn: E170000: Unable to open an ra_local session to URL svn: E170000: Local URL 'file://media/repos/mainrepository/mywebsite' contains unsupported hostname The only thing I think maybe causing the issue is the file settings: drwxrwxrwx 2 root root 0 Jun 11 2009 repos As you can see the owner is root, I think it needs to be www-data, but for some reason I can't change it. Any help appreciated.

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• Is it possible to remotely login to one domain from another (there is a trust created between them)

  - by Joe

  Two AD server representing a domain each in one forest. There is a 2-way Forest-wide trust created between them, but users of one domain cannot remotely login to a machine in another domain. But a share is accessbile from another domain, confirming that the trust is created. Can users remotely login from one domain to another domain? If so, how? Testing environment very simple: W2k3 server (AD server) : Domain : XYZ.com Machines : xp,vista users : u1,u2 w2k8 server (AD server) : Domain : ABC.com users : u3,u4 Connect remotely to xp machine (RDP). use user credential of u1/u2. - able to connect use user credential of u3/u4. - not able to connect

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• DFS Replication, Users HOME folder - seems not to catch all files... any hints?

  - by TomTom

  I amm moving stuff out of a file Server. I am using DFS for that - the Folders are anyway in a DFS tree, so I can set up a replication temporarily, then drop the old Folder. Works nice, EXCEPT for the Folder containing the users home drives. Which, incidentally, is also the one I can not see all files in due to my permissions. Small Setup. We have 159mb in the users directories, 1280 files, 133 Folders original. The copy only has 157mb, 1269 files, 133 Folders. Anyone knwos of a way to find out what files are missing? IS this a Problem (could be some Caching files that are regenerated). Users are all offline (weekend) ;) This is pretty much the last share - all others had exactly ZERO issues.

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• New Servers Active Directory and Exchange

  - by user3164638

  I have 3 Dell PowerEdge server, each with 2 quad-core processors. I am going to bring this office out of the stone-age network (P2P, share files on a flash drive, emails through Google, etc) and set up Active Directory and Exchange 2013. Our needs are not that great at the moment - our staff consists of approximately 40 people, and our network may eventually be managed by an external company. We need only one domain for our emails (though we may serve emails for a few other partners domains as well). I was thinking of setting something up like this: Server 1: Primary DC. Active Directory and Exchange on separate virtual machines. Server 2: Redundant of server 1. Server 3: Shared resources, storage, backups, etc. How would you utilize 3 servers for an Active Directory / Exchange setup for a small/medium office? We do have plans to grow, so my solution must be scalable, though I'm not sure that I want to split permissions, though I'd consider it if that was something that could be changed on down the road.

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• Does a dedicated video card improve HTML5 websites, Skype or Flash games performance?

  - by Kiewic

  I have read that having a dedicated video card (GPU) improves performance if you use your computer to play video games. I guess to make this happen, video games or apps must be using especial libraries designed to share the workload with the GPU, maybe Direct X or OpenGL, I don't know. Am I wrong? So, can HTML5 websites, Adobe Illustrator, Flash games (Zynga games), Skype or Netflix benefit from a dedicated video card? I usually do the previous activities simultaneously. Should I consider changing from an integrated video card to a dedicated card if I want to improve performance? Thanks.

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