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• Unable to delete a file or take ownership on Win7x64

  - by Basic

  I'm a developer and as part of the build process, a Microsoft dll is copied to a certain folder. That file copy is now failing as the target can't be overwritten. I decided to delete it by hand (using an admin account but a non-elevated explorer) so browsed to the folder and attempted a delete. This failed (Require permission from the Administrator). The same applies when using an elevated explorer. So I tried Properties-Security-Advanced-Ownership The current owner is showing as Unable to display current owner. I can't take ownership (a simple Access Denied message with no elaboration). Elevated Command Prompt/PowerShell don't help either (both give an Access Denied in their own way). Process explorer shows no open handles on the file. Eventually, I booted to linux and deleted the file but what I'd like to know is what caused it? Security Essentials had no issues with the file. It's digitally signed by MS and the signatures match.

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• .bat file - Nagios v3.2 service check and start if stopped

  - by LbakerIT

  I'm just barely getting into programming so I do apologize for my ignorance. I'm trying to create a .bat file that will check if a service is running on XP Pro. If service is running it will exit 0. If the service is stopped start service wait 10 seconds (via ping i'm guessing) check if service is running if service is running exit 0 if service is stopped start service wait 10 seconds Do this check a total of 3 times. if service does not come up within that time: exit 2 Exit 0 = ok exit 1 = warning exit 3 = critical (and this will alert) I need to do this for 3 different services but i'm expecting that it would be better to create one per service. That way you get notified on the specific service that is not coming back up. The goal is that if the service stops it will start it. If after 30 seconds it is unable to start the service then it will send an alert. The reason I'm trying to do it with a .bat is this is consistent with all other scripts and I did not want to complicate it further by adding different kinds of code. Yay for consistency! Again I do apologize for my ignorance I've been thrown into this project last minute. Thank you for the help and reading my question!

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• How do I reformat/reinstall an OS on a hard drive after its been wiped by eban?

  - by Aggrevated

  I am trying to install XP SP2 Home on a Dell Inspiron 531s. Yes it came with Vista but I happen to own a legal copy of XP. I bought the hard drive off eBay(used). I changed the bios settings to boot from CD and when I start up the computer it goes to the hard drive which says its been cleaned using eban XX.XXX.XXX. My problem is that I can't get the PC to boot from the XP disk. I have tried putting the disk into another PC it works. I have put the bad hard drive back in and the dvd+rw works. I am really stumped and am beginning to think that the hard drive is unusable. I only have the sata cords for 1 hard drive to be hooked up at a time. Any ideas or suggestions or confirmation that I can't use this hard drive would be appreciated. Yes I am probably a 'noob' but I have installed XP and Vista many times without any problems. I don't need to be put down on my level of experience I just need answers. Thanks Everyone

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• How do I reformat/reinstall an OS on a hard drive after its been wiped by eban?

  - by Aggrevated

  I am trying to install XP SP2 Home on a Dell Inspiron 531s. Yes it came with Vista but I happen to own a legal copy of XP. I bought the hard drive off eBay(used). I changed the bios settings to boot from CD and when I start up the computer it goes to the hard drive which says its been cleaned using eban XX.XXX.XXX. My problem is that I can't get the PC to boot from the XP disk. I have tried putting the disk into another PC it works. I have put the bad hard drive back in and the dvd+rw works. I am really stumped and am beginning to think that the hard drive is unusable. I only have the sata cords for 1 hard drive to be hooked up at a time. Any ideas or suggestions or confirmation that I can't use this hard drive would be appreciated. Yes I am probably a 'noob' but I have installed XP and Vista many times without any problems. I don't need to be put down on my level of experience I just need answers. Thanks Everyone

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• Working with an external button box

  - by Scott

  I tried this question on Stack Overflow, but I was pointed here, so here goes: For a new project for myself, I am looking for a way to be able to (for example) open a pop-up window on my laptop, by pressing a button on an external device (to be build by myself, or at least bought) connected with USB. Basically I would be looking at something like a Arduino or Raspberry (IF I am looking in the right direction) with buttons on it, and as soon as I hit a button on the external box with physical buttons, a command activates on my laptop and for example opens a popup window in which I can input tekst. Does anyone know: 1) if it is possible to do this at all. 2) What equipment is needed for the external box, what programming is needed. I preffer .net (dot net) but maybe it can only be done with software from the external box. If anyone can point me in the right direction, like make/model of the external box or websites I would be very happy. I have knowledge of Visual Studio/.net but I am willing to learn other languages if .net is not an option for this project. Thanks in advance Scott PS: If anyone knows of some better tags, or at least knows what I mean and needs me to edit the question, please do tell me... I am new on Stack Overflow/Superuser.

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• Winodws server 2003 Setup

  - by Barracksbuilder

  I work at a university maintaining the computer science department server. I am looking for a more economical way to stream line the set up of student accounts. CS students are granted a Username and password an IIS virtual directory, FTP virtual directory, and a mysql database. Server is running windows server 2003R2 (Possibly migrating to 2008R2) The server is running a domain though no students physically log a terminal into it (No computers are part of my domain.) Creating the account is a manual process. I did right a PHP script to query the Universities AD and copy the information and write it to my AD. I then have to create basically the users home directory. I tried having AD do it but since the user never physically logs in it never creates the directory. Permissions on this folder are set to User - full, Instructors (group) - full, Users (group) - read, IUSER - read. Inside of the users folder their is a "Private" folder with permissions User - full, instructors (group) - full. Next step is IIS I create a virtual directory in the default web site pointed to the users home directory so they have a website. Same goes for FTP virtual directory in the default ftp configuration to allow the users to upload files to their website. Mysql I have to create a user and password then create a mysql scheme (database) full access for the user and full access to the instructors account to be able to access the students database. All of this is done manually and takes me a week to do. The closest description is maybe a shared hosting environment. Is there a better way to do this? Scripting wise, or better structure setup?

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• How can I get (g)Vim to display the character count of the current file?

  - by OwenP

  I like to write tutorials and articles for a programming forum I frequent. This forum has a character limit per post. I've used Notepad++ in the past to write posts and it keeps a live character count in the status bar. I'm starting to use gVim more and I really don't want to go back to Notepad++ at this point, but it is very useful to have this character count. If I go over the count, I usually end up pasting the post into Notepad++ so I can see when I've trimmed enough to get by the limit. I've seen suggestions that :set ruler would help, but this only gives the character count via the current column index on the current line. This would be great if I didn't use paragraph breaks, but I'm sure you'd agree that reading several thousand characters in one paragraph is not comfortable. I read the help and thought that rulerformat would work, but after looking over the statusline format it uses I didn't see anything that gives a character count for the current buffer. I've seen that there are plugins that add this, but I'm still dipping my toes into gVim and I'm not sure I want to load random plugins before I understand what they do. I'd prefer to use something built in to vim, but if it doesn't exist it doesn't exist. What should I do to accomplish my goal? If it involves a plugin, do you use it and how well does it work?

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• Is this DVD drive broken? Brand new, i need help convincing

  - by acidzombie24

  I am asking bc i know dell is going to give me a problem. How do i know if my DVD is broken on my laptop? i burnt 4 DL disc and they ALL failed, i called and dell suggested roxio. I used it and burnt 1 disc without error and the 2nd disc with an error. With both apps there were no 'problems' during the burning process only failed on the verification process. Some of these bad disc dont work on other PCs and one locks up windows when i click a specific file. Does that sound like a broken burner to you guys? when i called dell they told me since it can read disc properly 100% of the time and software doesnt fail in the burning process its not a broken drive _. They forward me to software support who demand a fee (i think $100) to help me fix my software. I am annoyed bc i dont want to be on the phone for them to watch me burn a dvd and since i burned it once correctly i dont want to happen to burn correctly again to have them say they solved my problem (doing nothing) and charge me refusing to refund. -edit- The errors i got were 1) the request could not be performed because of an I/O device error 2) Windows locking up when opening 1 specific file 3) Cannot copy : Data error (crc) NOTE: the file that causes the problems are random every disc

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• Is a modem required to be programmed when using with an internet provider?

  - by Tim

  I wonder if a modem is required to be programmed when using with an internet provider? If yes, what is the purpose of programming a modem? Do both a DSL and a cable ISP both require a modem to be used in an individual home? For example, I have a Motorola modem SURFboard Model:SB5101, Customer S/N: xxx S/N? xxx HFC MAC ID: xxx USB CPE MAC ID: xxx a coil of cable and a splitter from Comcast High-Speed internet Self-Installation Kit, which were bought 5 years ago, when I purchased Comcast internet service from its retailer www.comcastoffers.com. With them, I was hoping to reduce the amount of fee by avoiding to ask Comcast people to come over to install. But I remember at that time Comcast sent its technician here, dismissed my idea of self-installation, saying they needed to use their own modem and charging me a hefty fee, and so my equipments have never been used. I haven't been using Comcast for a long time. I wonder if my modem, cable and splitter (brand new, never used) are still good to use with an internet provider such as Comcast? If needed, we can ignore their policy and just consider the technology side? Or they are not good to use and I must throw them away like trash? Thanks and regards!

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• Exchange 2007 Backup - For a newbie

  - by mew3900

  I am trying to setup an exchange 2007 backup solution. After doing a lot of reading, Microsoft have decided in server 2008 unless you are willing to spend a great deal on a 3rd party solution you are pretty stuck! Essentially what I have been asked to do is perform an off-line file backup of our current exchange server and replicate this onto a new 2nd server. The reasoning behind this is that we need to upgrade our current installation of exchange 2007 to SP2 so that the exchange plug-in for windows server backup will be available to us. From this I can then actually take an exchange aware backup weekly and take it off site. Ideally then also we can migrate to this new server and keep the old one as a fail over. Is there a way I can copy across the files required onto a second server, although I doubt very much it is that simple. I may be barking up completely the wrong tree, however I have very limited knowledge with Exchange and any help and advice on how I would resolve this would be much appreciated. Thanks in advance

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• IIS 7: launch unique site instance per host name

  - by OlduwanSteve

  Is it possible to configure IIS 7 so that a single site with multiple bindings (or wildcard bindings) will launch a unique instance for each unique host name? To explain why this is desirable, we have an application that retrieves its configuration from a remote system. The behaviour of the application is governed by this configuration and not by the 'web.config'. The application uses its host name as a key to retrieve the configuration. Currently it is a manual process to create an identical IIS site for each instance of the application, differing only by the bindings. My thought, if it were possible, is that it would be nice to have one IIS site that effectively works as a template for an arbitrary number of dynamic sites. Whenever it is accessed by a unique host name a new instance of the site would be launched, and all further requests to that host name would go to that instance just as though I had created the site by hand. I use IIS regularly, but only for fairly straightforward site hosting. I'd like to know if this could be configured with vanilla IIS 7, but would also welcome answers that require a plugin or 3rd party product. Programming/architectural suggestions about changes to the app wouldn't really be appropriate for serverfault.

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• What apps can you only get on Mac and not Windows?

  - by ytk

  What apps do you absolutely have to use a Mac to run, and there are no decent Windows PC equivalent? This is not a religious war. Please be specific and practical It doesn't have to be a direct 1-2-1 comparison, but overall usefulness to the task I'll start off with a few: KeyNote -- the animations are quite cool and not available in PowerPoint iTune's photo sync -- on Windows it makes copy of all the photos you want to sync, effectively double the space taken up by your photos. On a Mac it's easier as long as you use iPhoto Keychain -- a centralized password manager tied to the OS. The benefit of this is you don't have to set a Master Password (like Firefox) which you need to enter when starting the browser. And it doesn't reveal your password (like Chrome, which makes no effort in hiding the password you have stored in Options) Time Machine -- 0-configuration backup in the background. Easy interface for restoring a file, or even just a contact in the address book. Text-to-speech -- works in any program, and sounds better than Windows computer voice Quick View -- press space bar to preview a file. Windows95 had quick view, but was removed.

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• Shrink Windows OS partition with unmovable files

  - by Tim

  I am trying to shink Windows 7 OS partition C: but cannot shrink as much as I plan due to unmovable files. I have tried Windows own defrag tool before but it does not move files that are unmovable. Here are some ideas I have learned from previous posts, and I hope at least one of them will work and wish to know the detail how to do: Inspired by this post, which suggests backup C:, then delete C: , create a smaller partition, and then copy the backup to the smaller partition. I was wondering if anyone here can confirm that Windows 7 will still work in this way? What reliable tools can be used for backuping the system, and deleting and creating partition, and then copying back the backup in this method? I am actually trying another way suggested in this post. I have identified what unmovable file currently stop further shrinking: \ProgramData\Microsoft\Search\Data\Applications\Windows\Projects\SystemIndex\Indexer\CiFiles\00010015.wid::$DATA If I understand correctly, the file belongs to Windows Search. Can I set up somewhere in Windows system settings to temperately eliminate the file and similar ones (because there are many similar files under the same directory which I guess will also stand in the way of shrinking and unmovable by defrag)? Any other idea that might work will also be appreciated. Thanks and regards!

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• Iptables and system-config-firewall

  - by nivde92

  I had a set of netfilter rules set with iptables, but someone else told me to use system-config-firewall to add a rule for sharing files with Windows. (Samba) This rewrote the iptables rules file and I lost my own custom rules. I have a backup copy, but am having trouble restoring them. Edit: The server is Centos, I already tried to restore the rules with iptables-restore < /root/working.iptables.rules but for some reason the rules don't change. What are you trying to do? Trying to restore the iptable rules that I have in a backup file. What have you tried in order to make it happen? I've tried to modify the iptables file with vim, since the command iptables-restore was no help. What results did you expect? To get the old rules back. What actually happened? Nothing, when I run the command or edit the file by hand the file doesn't change at all. Maybe something else it's overwriting.

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• Where's my free space gone? (on my mac) [closed]

  - by Cawas

  Possible Duplicate: Something’s slowly eating my HD space Somehow part of my files from my USB disk, 40GB of it (exactly the space I was missing), were copied to /Volumes/ and when I mounted the disk it was called "600GB Disk 2", while "600GB Disk" was filled with duplicated data. All that happened at once, slowly, just this morning when I turned on my macbook. I could notice that thanks to Disk Inventory X. I could actually see those on GrandPerspective, but I thought it was just scanning my USB limited to that folder for whatever reason. On Disk Inventory I could see the /Volumes/ listing one folder as a folder and the second one as a link, like it should be. Well, looking at that folder, I quickly associated what was in it with my scheduled backup on Carbon Copy Cloner. I'm still not sure why the USB disk was mounted with wrong name, but what happened was CCC store the full path information of the source and destination, so when it tried to do the schedule backup it created the path that didn't exist, and copied everything there - while it should be copying into the mounted volume. While this is solved this time, what else could I have done to diagnose this kind of issue, for the next time?

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• How can I get DVDs playing after a Vista to XP change? [closed]

  - by Liath

  I replaced my vista install on a Dell Inspiron 1525 with XP and have managed to get most things up and running again however I'm having trouble with playing DVDs. When I try and play a DVD I get the following message: Windows Media Player cannot play this DVD because there is a problem with digital copy protection between your DVD drive, decoder, and video card. Try installing an updated driver for your video card. I have ensured that my drive is configured to play Region 2 discs (I'm in the UK), I've installed the most up to date XP codec pack which makes me think it's a driver issue. In device manager I have got my DVD drivers up to date however under "Other Devices" I'm missing several which sound key: Audio Device on High Definition Audio Bus Modem Device on High Definition Audio Bus Video Controller Video Controller (VGA Compatible) However I've installed all the relevant drivers I can find on the Dell website. The drive itself is working - I've run software from the drive. I'm afraid I am far from a sys-admin so I'm struggling on this one. How can I get my DVDs playing again?

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• CentOS and OpenSSH [on hold]

  - by Stephen

  I've recently installed CentOS 6 on an old Dell PC. I'm trying to setup OpenSSH at the moment, I been following some tutorials (http://www.youtube.com/watch?v=QKafb0koJEg) on You Tube, while they have been very helpful I'm at the point where I need to ask some questions. My goal here is to be able to access the server from my work computer and from my personal laptop (which will be on the same home network as the server). I've installed OpenSSH with no issues. So the first thing I was advised to do was port forwarding. So in the sshd_config file, I've changed Port 22 to Port xxxx (where xxxx is a obviously a four digit value). I then restart the sshd service. I've also configured my router for forward port 22 onto xxxx. Is there anything else I need to do? I've generated the keys on my laptop, and I'm trying to copy them to the server as follows: scp id_rsa.pub xxxxxxxx@localhost:.ssh/authorized_keys but this command fails with the following error message: ssh: connect to host localhost port 22: Connection refused lost connection Any help appreciated. Regards...

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• Efficient mirroring of directories using hard links [closed]

  - by zoqaeski

  I'm backing up my music collection on to a number of NTFS-formatted external hard-drives; however, as I store my main collection in FLAC and have my library on my laptop as MP3s to save space, I want to be able to back up both sets, because mass conversion between formats is time-consuming. The "music" directory can contain any format; the "mp3s" directory contains only MP3s converted from files in the "music" directory. The music collection on the laptop contains only MP3s, but they come from both sources. When I backup my laptop's library to the "mp3s" directory, I want to only copy across MP3 files that don't exist in the "music" directory; those that do should be hard-linked to the "music" directory. All directories have an identical hierarchy, sorted by artist, album, date, discnumber if applicable, etc, and I use a tagging editor to ensure consistency across all these locations. I'm also using a Linux computer, but keeping the music collections on NTFS-formatted partitions so that they are readable by both Linux and Windows. At the moment, I use the following command to perform the backups, but this is time-consuming due to the expensive nature of finding hard links. rsync -avu --progress --relative --ignore-existing --link-dest=../music/ **/*.mp3 /media/ntfspocket/mp3s Is there a way to perform this backup more efficiently, taking advantage of the directory hierarchy?

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• very diferent results from df after few seconds

  - by tatus2

  When the backup moves the files from one to the other server the results from df changing every some seconds in impossible manner. On source host is running rsync. On destination host I'm running every few seconds following command: echo `date` `df|grep md0` Results are below: Sat Jun 29 23:57:12 CEST 2013 /dev/md0 4326425568 579316100 3527339636 15% /MD0 Sat Jun 29 23:57:14 CEST 2013 /dev/md0 4326425568 852513700 3254142036 21% /MD0 Sat Jun 29 23:57:15 CEST 2013 /dev/md0 4326425568 969970340 3136685396 24% /MD0 Sat Jun 29 23:57:17 CEST 2013 /dev/md0 4326425568 1255222180 2851433556 31% /MD0 Sat Jun 29 23:57:20 CEST 2013 /dev/md0 4326425568 1276006720 2830649016 32% /MD0 Sat Jun 29 23:57:24 CEST 2013 /dev/md0 4326425568 1355440016 2751215720 34% /MD0 Sat Jun 29 23:57:26 CEST 2013 /dev/md0 4326425568 1425090960 2681564776 35% /MD0 Sat Jun 29 23:57:27 CEST 2013 /dev/md0 4326425568 1474601872 2632053864 36% /MD0 Sat Jun 29 23:57:28 CEST 2013 /dev/md0 4326425568 1493627384 2613028352 37% /MD0 Sat Jun 29 23:57:32 CEST 2013 /dev/md0 4326425568 615934400 3490721336 15% /MD0 Sat Jun 29 23:57:33 CEST 2013 /dev/md0 4326425568 636071360 3470584376 16% /MD0 as you can see I start from USE of 15% and after 15 seconds I'm at 37% (I don't need to mention that the backup can not copy this huge amount of data in so short time). After ~20 sec the cycle closes. I'm again roughly by the same usage as earlier. The value is reasonable ca. 35 Mb were copied. Can somebody explain me what is going on? Does df only make an estimation of usage instead of used value?

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• Diagnosing PC crashes (most often while using shared folders or torrents)

  - by Dyppl

  For the last few weeks my PC (pretty old P4 with WinXP SP3) has been crashing randomly. It just suddenly reboots instanteneously. It feels hardware-related but I wasn't able to determine wether it's software or hardware that causes it. I did notice a pattern though: it's more likely to crash when I copy a lot of files over network or have uTorrent running, but sometimes it crashes when I am not doing anything with it. Copying files from it over network causes it to crash in 1 to 10 minutes almost every time. Using torrents causes it to crash every 1-3 hours. With neither or that on it crashes every 24 hours or so. I ruled out the following probable causes: PSU (I bought a new one and turned off most of the drives so the power is sufficient 100%) Bad HDD or interface cable on my SATA disk from which I was originally copying the data over network (bought new SATA cable and later yanked out the HDD completely, PC still crashes without it) Video adapter (AGP slot is now empty, using the onboard VGA at the moment) Network adapter (removed it from PCI, using onboard LAN) CPU (I think: I changed the termopaste and it's temperature is below 50C) RAM (I think: I ran Memtest86 and it didn't show any errors) At the moment I only have only one system HDD and DVD drives, a mouse and a keyboard plugged in. The fact that it crashes most often when I use network extensively makes me think that maybe it's software related (I removed the network adapter from PCI and now am using an onboard one, so network hardware is unlikely to cause problems). I am now pondering system reinstall but it's not a pleasant solution so I decided to ask wether there are better ideas first. If someone can share a good diagnostic tool it would be great because I didn't find anything good. Thanks in advance, I hope that "help to diagnose" questions aren't entirely banned here. EDIT: Motherboard is actually ~4 years old as I replaced it back in 2007

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• Corrupted Laptop - Transfer Data Without My Computer (explorer.exe) Using Command Line

  - by nicorellius

  I have a laptop (Toshiba Satellite) that is pretty messed up. The person this belongs too already replaced it with a new machine. My job is to transfer all her data from this machine to disk so that I can transfer it to her. She doesn't want to lose any data (understandably so). Any operation I attempted (i.e., double clicking on any folder icon, like My Documents, My Computer, etc) resulted din a complete crash. The only good news is that I can actually start and navigate around using the command line. Also, I can access the internet. I have a network, so if I can map the drives I can get this thing figured out (hopefully). Also, I tried a USB drive but I couldn't figure out how to access it from the command line. Two questions (I need to use the command line for these): How would I go about accessing the USB drive and how can I map the shared drives on my network so that I may cd to that directory for use of the copy command?

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• File gone or altered after MySQL[HY000][2002] error [on hold]

  - by Psyberion

  I'm working on a rather small project, and today I got an SQLSTATE[HY000][2002]:Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' error. After a bit of googling and a few attempts to restart the mysqld service, I gave up and tried rebooting the computer. This did the trick, MySQL was now running fine. I did, however, get a more serious issue: Some files were missing, others were altered. Also, a few posts in the MySQL was gone. It's really strange, it's like the whole project has been reset two or three days, and I have no clue why. Some additional details about this: I save my files after every line of code. I'm religious about this. So I haven't lost the files that way. I was accessing the server via SSH when the error occurred, so I did the programming and the reboot over SSH. The server is a Raspberry Pi, model B, with Raspian on which I run Apache2. I was viewing the site and had an active session when I rebooted the system. The pages I lost did work just before this all happened. The MySQL fault occurred when I tried to add a text NOT NULL column to a table which had entries. Now, the amount of lost work isn't really that much, so I'm not really looking for help recovering the files. The reason I'm posting this is because I wonder how did this happen, and why?

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• Memory Usage by Mapped Files (Win7 64Bit)

  - by Dexter

  When copying files from/to my external USB3 HDD memory usage in Win7 goes up to 100% and remains there. I'm not sure whether this is a problem caused by faulty drivers or not, but I already have the current version of them (Etron USB3 controller on a Gigabyte 990fxa board).. Using RAMMap it becomes obvious that the files, that are to be copied, are mapped into memory. Clicking on Empty > Empty System Working Set seems to temporarily fix the problem (without causing any trouble with the file copy process), but it needs to be done every few seconds. Is there any way to schedule this operation to happen ever 10 or so seconds on its own? What underlying system command is RAMMap using? Or, alternatively, is there any way to limit how much RAM mapped files may use in Windows 7? I know mapped files would usually be removed from memory if other programs need the memmory, but while memmory usage is at 100% the system starts freezing up for half a second or so everytime I click anything .. thus the automatic removal of unused memory contents seems to be failing here.

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• VM automatic provisioning advice

  - by jdgregson

  In my lab we have 24 workstations, each with five technician-maintained virtual machines set up in VMware Workstation. These provide a lot of management overhead, as we have to update them as well as the host operating systems every three months (the start of the next quarter), which adds up to 144 systems to update instead of just 24. Whenever we need to reimage the hosts, the VMs add another 130GB to each image, which is over 3TB of extra data to send over the network, and a lot more time to apply each image, and then we still have to boot all 120 VMs and assign them a unique IP Address and host names. We would like to get the VMs off the hosts and onto a server, but after looking around for a few days, I still don't know where to begin looking for a solution. There may be a better way to do this, but in my mind, the ideal solution would be to replace the VMs on the host machines with five Thin Client operating systems, each configured to connect to a server and be sent or connected to a unique virtual machine. We can't have 120 VMs running on the server all the time, so the server would have to create a copy of the VM from a template whenever a student tries to boot one, and destroy the VM after the student is finished with it. If there is another client application that has to be installed on the hosts that would be fine, the only reason I'd like to keep them in VMware Workstation is because students already know to look there for the VMs when they need to use them. What, if any, virtualization software will allow this? Is there some other solution I'm not seeing?

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• What is the potential for a FUSE mount to destabilize a Linux server?

  - by 200_success

  I'm a sysadmin for a multi-user server, where students in our department have shell accounts. One of our users has requested that we install sshfs on it. I'm debating whether it would be wise to install sshfs as suggested. My main concern is whether a FUSE mount could make our server less reliable. In my experience, bad things can happen to servers when an NFS server suddenly becomes unavailable — the load average shoots up, and you might not be able to unmount it cleanly, to the point where a hard reboot might be necessary. If a FUSE-mounted server suddenly disappears, how hard might it be to clean up the mess? Are there any other likely catastrophes or gotchas I should consider? At least with NFS, only root can mount, and we can choose to mount NFS servers that we consider to be reasonably reliable. Let's assume that our users have no hostile intentions, but might do stupid things accidentally. Also, I'm not really worried about the contents of the filesystems they might mount, since our users already have shell access and can copy anything they want to their home directory.

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