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• Multi-machine backup solutions

  - by Paul

  I have a growing number of PCs and laptops in my home that need a backup solution. My question is 2 fold: Most commercial backup vendors appear to license by the machine, are there any products that give a license that can be used on all your machines, without a per machine cost? An alternative is to have a centrally controlled back up strategy controlled from a single PC with an attached hard drive that can back up other machines on the network. What backup software is suitable for this approach? Will this software be windows/Linux interoperable? I've searched for duplicate questions but don't see anything that addresses the multi machine/cost issue. OSs in network will be Windows (XP, Vista, 7) and Linux variants. Not pattern to when machines will be switched on.

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• Having trouble searching for a ‘.’ using htaccess.

  - by ThisLanham

  I'm setting up a website that (ideally) would allow users to access other users' homepages with a url in the format "www.mysite.com/ThisLanham" where 'ThisLanham' is the username. The username begins with a letter and can consists of any alphanumeric character along with an underscore, hyphen, or period. So far, the redirection has worked perfectly when I ignore usage of the period character. The following code handles that request: RewriteRule ^([a-zA-Z][0-9a-zA-Z-_]*)/?$ Page/?un=$1 [NC,L] However, I've tried a number of ways it check for the period as well, but all have resulted in a 500 Internal Server Error. Here are some my attempts: RewriteRule ^([a-zA-Z][0-9a-zA-Z-\_\\.]\*)/?$ Page/?un=$1 [NC,L] RewriteRule ^([0-9a-zA-Z-\_\\.]\*)/?$ Page/?un=$1 [NC,L] RewriteRule ^([a-zA-Z].\*)/?$ Page/?un=$1 [NC,L] RewriteRule ^(.\*)/?$ Page/?un=$1 [NC,L] also tried... RewriteCond $1 != index.php RewriteRule ^([a-z][0-9a-z-_.]*)/?$ Page/?un=$1 [NC,L] My backup plan is to no longer allow users to include periods in their usernames, but I'd much rather find a solution. Any ideas?

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• Empty MacBook Pro, no SuperDrive. How do I install Windows?

  - by MCcz

  My situation is this: HDD1: Empty 180 GB SSD HDD2: Empty 500 GB HDD (instead of SuperDrive) Accessories: Windows 8 ISO 64 Gig USB stick Second computer SuperDrive in USB enclosure What I need: Install Windows 8 on the SSD in the laptop What I tried: Create bootable USB – Doesn't work. Macbook doesnt show me USB as an option after holding OPTION key. Install Windows through SuperDrive connected via USB – Doesn't work. On the internet, there are thousands of articles telling me all kinds of solutions, expecting me to have Mac OS on my laptop. Is there any solution to this?

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• unlock database files when SQL server is idle

  - by Andy

  In my development/test environment on my laptop, I can't back up the SQL server database files because the file handles are kept permanently open by SQL server (VSS doesn't work because the drive is truecrypted) I was hoping there may be some setting in SQL server that can make it unlock the data files after a certain period of inactivity and automatically open them again on demand, but I can't find anything. I don't really want to be dumping the database out every night because it's only a development environment. apart from stopping sql server before I do the backup is there any other solution?

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• Which are the best ways to organize view hierarchies in GUI interfaces?

  - by none

  I'm currently trying to figure out the best techniques for organizing GUI view hierarchies, that is dividing a window into several panels which are in turn divided into other components. I've given a look to the Composite Design Pattern, but I don't know if I can find better alternatives, so I'd appreciate to know if using the Composite is a good idea, or it would be better looking for some other techniques. I'm currently developing in Java Swing, but I don't think that the framework or the language can have a great impact on this. Any help will be appreciated. ---------EDIT------------ I was currently developing a frame containing three labels, one button and a text field. At the button pressed, the content inside the text field would be searched, and the results written inside the three labels. One of my typical structure would be the following: MainWindow | Main panel | Panel with text field and labels. | Panel with search button Now, as the title explains, I was looking for a suitable way of organizing both the MainPanel and the other two panels. But here came problems, since I'm not sure whether organizing them like attributes or storing inside some data structure (i.e. LinkedList or something like this). Anyway, I don't really think that both my solution are really good, so I'm wondering if there are really better approaches for facing this kind of problems. Hope it helps

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• Two distinct mount points with one device

  - by user1761555

  After being disappointed with Ubuntu's release update feature, I finally decided to have separate mount points for / and /home. Towards this, I reformatted my HDD giving most of my drive to sda1(meant to be /home) and allocated about 40GB to rootfs (/). Unfortunately, I would also like to have a /projects which is to be located on sda1. Currently, sda1 is being mounted as /dev/sda1 on /home type ext4 (rw) I've tried looking online for a solution to this problem..however, I'm not sure as to what to look for! Is it possible to mount the 'home' directory of sda1 as /home and 'projects' directory of sda1 as /projects?

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• 12.04 LTS Apache2 writing files from webpage at runtime has no effect - possible read/write permissions?

  - by J Green

  I'm running 12.04LTS with Apache and Mono in VirtualBox, with the goal of hosting a web app (coded in ASP.NET and C#) on my local network. The scripts on the page are able to successfully read from text files in the same directory as my site (/var/www/mysite/) but do not seem to be able to write. I'm sure the code works, because it did with my testing in Visual Web Developer on Windows. I don't get any errors, but when I click the button on the loaded webpage, the text file in question does not change. I'm fairly new to Linux in general, so I'm not too familiar with how to set permissions properly, and it may be a permissions issue. Unfortunately, I have searched all over the internet and haven't found a solution that worked, but I've tried (perhaps incorrectly) changing the owner of the files in question to www-root, changing the mode to a+rw, but sadly to no avail. I have tried everything here but it doesn't work: Whats the simplest way to edit and add files to "/var/www"? I hope someone can help me out.

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• Auto restart server if virtual memory is too low

  - by Sukhjinder Singh

  There are quite number of software running on my server: httpd, varnish, mysql, memcache, java.. Each of them is using a part of the virtual memory and varnish was configured to be allocated 3GB of memory to run. Due to high traffic load which is 100K, our server ran out of memory and oom-killer is invoked. We've to reboot the server. We have 8GB of Virtual Memory and due to some reason we cannot extend to larger memory. My question is - Is there any automated script, which will monitor how much virtual memory left and based upon certain criteria, lets say if 500MB left than restart the server automatically? I do know this is not the proper solution but we have to do it, otherwise we don't know when server will get OOM and by the time we know and restart the server, we lost our visiting users.

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• Searching Excel sheet for errors

  - by Graphth

  Imagine a huge worksheet with tens of thousands of formulas. I want to be able to quickly find all the errors to correct them. I have found that using the normal search procedure I can type in things like #DIV/0! or #NAME? and it will find them, but I would have to type in all the various types of errors separately and that is somewhat time consuming. Is there a way to simply search for any error? One solution we seem to use at work is to put most formulas inside =if(iserror()) or now =iferror() and to just have it output "error" if it is an error. Is this necessary? Or, is there a way to find all the errors without it?

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• Dead USB flash drive

  - by Unsliced

  So a friend has come to me with a problem. They have a dead USB thumb drive which no longer responds when plugged into a machine. I've tried it in a Mac and it doesn't even respond, at least on a Windows XP machine it sees that it is there but can't show it in explorer, just that whatever is plugged in has malfunctioned. There is obviously current because the activity light on the drive illuminates. I'm looking for suggestions, please. I have access to Mac or Windows hardware and am happy to experiment (and even to pay if the solution works!) It's a bit late to recommend regular backups, but in the lack of that, what's the next best forensic advice? Edit: I should stress that, if possible, we're trying to rescue the data, after all, thumb drives are basically disposable and hardly worth the bother if there's no emotional or functional reason for wanting to rescue it!

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• Code-First Database Creation During TFS 2010 CI Build

  - by jedimindtrickster

  I would like to automate code-first database generation during the automated CI build of a web project in Team Foundation Server 2010. When run locally the tests create a code-first database specified by the connection string in the app.config of the tests project. How do I configure the TFS Build Configuration to mimic this behaviour on the TFS build server? Edit The problem, it turns out, was that the TFS build server was successfully running the test which was using the default connection string in the app.config which pointed to the local SQL Server, not where I expected it. The solution was to use SlowCheetah on the TFS server as a means to transform the App.config file using the QA transform as per this blog article.

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• Virtual Box start from dual boot systme

  - by Richard

  So for a long time now, I've been running Linux on a dual boot system with Windows 7. I don't run Windows very often, however it happens enough now that I started looking at alternatives to reboots. A friend showed me Parallels on his Mac, and I fell in love with the concept of Virtual machines. Since Sun has been in the Unix space since the beginning of time, they likely have the best solution for Linux (big assumption I know). Anyway, to avoid re-installing windows, as I have it set up the way I like it now, I was wondering if there was a way to point to the existing install and boot from that point. Linux is installed on /dev/sda Windows is on /dev/sdb Having never done this before a little handholding would be great as to what step I should take. Thanks for any help in advance!

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• How do I reduce RAM usage on my server?

  - by Abs

  I have recently launched a site that is very popular but I am having trouble with scalability. My site makes heavy use of FFmpeg and at peak times RAM usage hits the 2 GB point quickly and the swap file starts getting used. CPU usage starts rising too. Users complain that the site is slow. They say this because all FFmpeg instances run very slow because of the number running at the same time. Users make use of FFmpeg on my server in real time. Is there anything I can consider or do to ease down the usage of the server and RAM just shooting up? Maybe there is something better than FFmpeg (!). Is the only solution "throwing some cash" at a more powerful server? I have given little information, please ask for more, so this problem can be solved.

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• Random generation of interesting puzzle levels?

  - by monsterfarm

  I'm making a Sokoban-like game i.e. there's a grid that has some crates on it you can push and you have to get the crates on crosses to win the level (although I'm going to add some extra elements to it). Are there any general algorithms or reading material I can look at for how I could go about generating interesting (as in, not trivial to solve) levels for this style of game? I'm aware that random level generators exist for Sokoban but I'm having trouble finding the algorithm descriptions. I'm interested in making a game where the machine can generate lots of levels for me, sorted by difficulty. I'm even willing to constrain the rules of the game to make the level generation easier (e.g. I'll probably limit the grid size to about 7x7). I suspect there are some general ways to do level generation here as I've seen e.g. Traffic Jam-like games (where you have to move blocks around the free some block) with 1000s of levels where each one has a unique solution. One idea I had was to generate a random map in its final state (i.e. where all crates are on top of their crosses) and then the computer would pull (instead of push) these crates around to create a level. The nice property here is that we know the level is solvable. However, I'd need some heuristics to ensure the level was interesting.

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• Hard disk failure. Can I recover my "move"d folders?

  - by Doug

  I am in the process of moving all my files from an old laptop to new one. I just moved 11gb of data from my old laptop to a hard drive (external) and then upon moving it out to the new hard drive, the hard drive is getting a CRC (Data Error (Cyclic Redundancy Check). Now I am looking for a solution to recover the files that I moved on my old laptop (not the external). I understand they they are just marked for potential overwriting to free up space. I was getting ready to test out GetDataBack, but it says to install it on a healthy windows and use the recover-needed drive as an external. However, I don't want to turn off my computer without first getting the okay since it is in a "moved" state. Please help! What can I do to recover the Moved files. I haven't touched the computer since it has been moved. What can I use to recover them?

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• Can you downmix Windows 7 sound to mono?

  - by Breandán

  I need my Windows 7 64 bit machine to output mono downmixed sound. Downmixed, not just single channel (I'm deaf in one ear). Is there any possibility to force such behavior. I'm looking for a software solution to mix two channels into one. I know that some media players have this functionality, but I'd like the whole system (ie games, flash applications, etc) to produce downmixed audio. (If none exist then just one for Spotify and Windows Media Player would be handy). Cheers.

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• BackupPC back-up has not been finished in 12 hours(!)

  - by chronoz

  I installed BackupPC toda on a server and set it to do a back-up 12 hours ago... while it's been backing up since, it seems very very slow and it's not completed yet. It's just backing up a testserver with a total disk usage of 1.8GB. What could cause the back-up process to be so slow? rsnapshot always worked wonderfully fast, but I want to improve my back-up solution. df shows that the size on the back-up disk is actually still increasing.

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• Problems with connecting to wireless network on windows 7

  - by Naveen

  I have a Dell laptop with Windows 7 (Home premium) 64 bit edition installed on it. I use a Wi-Fi router to browse the net. My problem is, I lose the network connection every 10 minutes or so. The network icon on the system tray shows the refresh icon and the status as "identifying network". The network is fine and works fine with my phone. I saw on the net this may be caused if I have enabled IPv6, so I disabled it but still problem persists. When I look at the event log I see the following entries: "Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0xXXXXXXXX. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server." I have also installed VirtualBox(32 bit edition) on the laptop. Does anybody any solution to this?

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• error: no such partition. Grub rescue

  - by user1440731

  I deleted Linux (Ubuntu) partition from windows Ii forgot to repair mbr. The thing is I don't have my windows boot CD with me now and not CD drive. so the solution I needed is that is there any small utility software that can be easily downloaded (I knew about hiren CD but that's about 500 MB and I don't need that whole stuff) and can work through USB? Also explain steps to perform. Thank you UPDATED: Any small Linux live CD can also b taken into consideration as i can boot that on USB using pendrivelinux software

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• CentOS box access by name

  - by out_sider

  I intent to develop a centos server with lamp. What I want is connect the server to any kind of home network and access it by http://myserver. I have already successfully set a static ip but I can't seem to ping it by name. If you had to develop a solution with the intent to plug in the box by Ethernet to a router and access it with a browser using the server name what would you do? That's basically what I'd like to know. Thanks in advance

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• Wireless does not work 12.10

  - by superkoop

  My primary issue is that my wireless does not work after I installed 12.10. The output to rfkill list all: 5: hci0: Bluetooth Soft blocked: no Hard blocked: no The output to lshw -class network is: *-network description: Ethernet interface product: 88E8040 PCI-E Fast Ethernet Controller vendor: Marvell Technology Group Ltd. physical id: 0 bus info: pci@0000:09:00.0 logical name: eth0 version: 12 serial: 00:21:9b:d6:46:51 size: 100Mbit/s capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full ip=192.168.1.102 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:44 memory:fe8fc000-fe8fffff ioport:de00(size=256) *-network description: Network controller product: BCM4312 802.11b/g LP-PHY vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:0b:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=b43-pci-bridge latency=0 resources: irq:17 memory:fe7fc000-fe7fffff The output to lspci -nn for the pertinent information is: 0b:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01) Thus, it seems the solution would be to run: sudo apt-get install linux-headers-generic sudo apt-get install --reinstall bcmwl-kernel-source sudo modprobe wl However, I do not currently have access to an ethernet connection, as I am currently only able to use verizon wireless 3g internet. Thus, is there a way to set up ICS with a Vista machine so that I can access the internet by using the Vista machine as the host? Or, is it possible to fix this by downloading the important packages in vista and moving them to ubuntu via USB drive?

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• Cannot Ping PS3 Using a Wired Connection

  - by Post

  PS3 is using the inbuilt wireless network adapter (I cannot change this) When I try to ping the PS3 from ANY computer which is on a wired ethernet connection, I get Request Timed Out errors. Whenever I ping from a computer with a wireless connection, it works just fine. To be clear: Pinging from Wireless PC to Wireless PS3 works Pinging from Wired PC to Wireless PS3 fails I have tried this on several PC's and Laptops all with the same results. As an attempted solution I have set up static IP's on all related devices. More information: Default Gateway = 192.168.2.1 PS3(wireless) = 192.168.2.100 PC(wired) = 192.168.2.99 Subnet Mask(for both devices, I have made sure) = 255.255.255.0 Thanks

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• High Availability Clustering and Virtualization

  - by tmcallaghan

  I'm trying to understand how the various virtualization vendors (specifically Amazon EC2, but also VMware and Xen) enable software vendors to provide a real HA solution in the environment where the servers are virtualized. Specifically, if I'm running any HA application (exchange, databases, etc) I need to ensure that my redundant virtual "servers" aren't located on the same physical server. Using in-house virtualization solutions (VMware, Xen, etc) I can provision accordingly as well as check the virtual - physical arrangement. I could, however, accidentally "vmotion" to the same physical hardware. With EC2, I don't even have the ability at provision time to select different physical servers. Since their Cluster Compute Instances are 1 virtual server per physical server it seems to be the only way to guarantee I don't have a false sense of redundancy. Any ideas or thoughts would be helpful. What are others doing about this problem? If the vendors provided an API where I could get something as simple as a unique physical system identifier I could at least know if I'm going to have an issue. -Tim

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• Forwarding requests throught Apache to openVPN

  - by Ency

  I am wondering if it is possible to redirect requests through Apache to eg. OpenVPN. As long as I need to bypass firewall, I need to use port 80/443 for openVPN, but there is Apache server which has both port for itself. Client ---> Firewall (allows 80/443 only) --->| ---> Apache (80/443) ---> OpenVPN (1194) | -------------------------------------------- My Server I was thinking about mod_proxy, but I am not sure if it is good idea, have you got any ideas? I hope possible solution will be applicable on virtual host as well.

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• What software can I use to co-ordinate a projector screen?

  - by aakashbhowmick

  When I connect my laptop to a projector, it shows everything that is going-on on my computer. However, I want want to show only certain things to users ( like videos, images, etc ). It would be good if my mouse-motions could be hidden as well. So is there any software using which I can give presentations without sharing my screen with the projector ( that is, it shows what I want it to show rather than mirroring what's going on in my laptop screen ) ?I've serached Google a lot and haven't found a solution as yet. Update : I am using Windows 7 Ultimate Edition. Update : Laptop model: HP Probook 4410s

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