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• Multi Monitor setup goes crazy after locking/unlocking Vista machine

  - by Farseeker

  Give me a 10-blade quad-processor quad-core Opteron centre and ask me to configure failover/load balancing and I'd be happy to, but the following problem has got me completely stumped. My Vista Business Professional machine, running Ultramon, has three monitors attached. When I lock the machine (to go to the delicious cafe around the corner), the monitor layout stays correct. When I unlock it, I watch as all my screens flicker (as they are being re-configured), and Vista chooses some crazy layout for the monitors. The most recent one is below, but it's never consistant. Any ideas what might cause this? It's Vista Business, with UltraMon 3.0 (exiting Ultramon makes no difference).

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• xauth error with ssh X Forwarding

  - by bdk

  From my (Debain) Desktop machine, I am trying to ssh into a Debian Server with ssh -X remote-ip After logging into the remote host, I get: /usr/bin/X11/xauth: creating new authority file /root/.Xauthority /usr/bin/X11/xauth: (stdin):1: bad display name "unix:10.0" in "remove" command /usr/bin/X11/xauth: (stdin):2: bad display name "unix:10.0" in "add" command And the X Forwarding doesn't work. From my Desktop I can ssh -X into other Debian servers and it works fine. I found a lot of threads discussing similar issues on google, but they all seem to fade out without a solution, and the simple things suggested there like exporting DISPLAY or setting xhost + don't seem to make a difference.

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• How do we keep Active Directory resilient across multiple sites?

  - by Alistair Bell

  I handle much of the IT for a company of around 100 people, spread across about five sites worldwide. We're using Active Directory for authentication, mostly served to Linux (CentOS 5) systems via LDAP. We've been suffering through a spate of events where the IP tunnel between the two major sites goes down and the secondary domain controller at one site can't contact the primary domain controller at the other. It seems that the secondary domain controller starts denying user authentication within minutes of losing connectivity to the primary. How do we make the secondary domain controller more resilient to downtime? Is there a way for it to cache the entire directory and/or at least keep enough information locally to survive a multi-hour disconnection? (We're all in a single organizational unit if that makes any difference.) (The servers here are Windows Server 2003; don't assume that we set this up correctly. I'm a software engineer, not an IT specialist.)

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• Detecting/Reactivating serial port that becomes inactive on Ubuntu Linux 10.10

  - by Tom

  I am using a usb2serial port to communicate with some old equipment (using my code built upon the boost asio library - I think my code is fine because it works almost all of the time). Every so often (maybe once every few days) the communication stops with my device with no error at all - the device just does not respond. I then restart my computer and everything is fine again. Does anyone know where I can start to analyse this problem? My serial port loads up fine (in /dev/ttyUSB0) and the boost library does not throw an error. The device just does not respond. If I restart the device no change - only when I restart my pc does it make a difference. I have also tried unplugging and replugging the usb connector. Does anyone know what gets cleared in the reboot (w.r.t the serial device) or what I can probe when the problem happens again (rather than just restarting with hope)

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• Differences between Remote Desktop and Terminal services

  - by Uwe

  What is the difference between Remote Desktop and Terminal services? We run a windows 2008 R2 server. There are several administrators who need to access this server. Windows 2008 allows only two concurrent sessions with different users. So I thought of installing terminal services. But I wonder what will happen to the server if I do so? What will be installed additionally? Will there be more features, ports, issues with the server?

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• How to Install PCRE Development Headers on Mac OSX

  - by martincarlin87

  I just upgraded my MacBook Pro to Mavericks and my local Ruby on Rails development environment isn't running straight off the bat, when I visit localhost I see It works! and remembered I needed to start Phusion Passenger, so when I run passenger start it checks all the requisites and fails when it gets to the PCRE Development Headers: * Checking for PCRE development headers... Found: no It tells me to go to http://www.pcre.org/ to download them so I downloaded 8.33 from here which went to my Downloads folder, so I unzipped it, cd'd to the folder and ran: ./configure make make install Then cd'd back to my rails app directory on my Desktop and re-ran passenger start but it's still the same. Tried a new Terminal window but that didn't make any difference. I must have done this before to get my dev environment working but can't seem to solve it this time. I also tried brew install pcre but it says Warning: pcre-8.33 already installed.

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• Weird problem with connection from putty to ubuntu server via SSH

  - by Eye of Hell

  Hello. I have an Ubuntu Server 9.10 box with sshd configured. I have two computers with Windows 7 professional and putty installed. Day ago, both computers was able to connect ubuntu server both via putty and plink. I have installed sun-java6-jre on ubuntu server, and now have a weird problem. First Windows 7 computer can still connect with both putty GUI and command-line plink. Second computer can connect via putty gui, but if i issue plink command that works perfectly on first computer: plink www.hostname.tk -i c:\users\username\documents\key\private.ppk I get login prompt, enter same username as on first computer, and receive following weird error message: bash: www.hostname.tk: command not found I can't see any difference between my Windows 7 computers :(. The ppk key used is same (i copied it multiple times both ways). hostname and username are same. Anyone have any ideas why such thing happens and what can i do in order to troubleshoot and fix it?

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• Why is my HDD not showing up?

  - by Mike

  I'm on Windows 7, got a new 2 TiB NON-external hard disk. When I plug it in it doesn't show up on the Disk Management list in the Computer Management window (that you get by right-clicking My Computer and selecting "Manage"). At first I thought it was broken, but I could see it using a friend's computer. I've run a full disk scan using the official tool from Western Digital, no problems. I've formatted it and partitioned it at another friends place, I've even encrypted the disk fully without any problems, then mounted it and placed a text file on it with the word "hello" inside and saved the file. When I boot my own computer the disk shows up in BIOS. So the disk is not broken. I've tried changing what SATA slot on the motherboard I stick it in. Makes no difference. After all this: Why won't my Windows 7 discover the disk???

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• What are the differences between the Fujitsu ScanSnap S300 and the S1300?

  - by Techboy

  Please can you tell me what the technical differences are between the Fujitsu ScanSnap S300 and the S1300 scanners? S300 = http://www.fujitsu.com/emea/products/scanners/scansnap/tmpl_scanners_scansnap-S300.html S1300 = http://www.fujitsu.com/emea/products/scanners/scansnap/tmpl_scanners_scansnap-S1300.html The only difference I can see is that the S300 has a CCD Image Sensor and the S1300 has a CIS Image Sensor. Other than that, the resolutions, pages per minute and physical sizes of both models are exactly the same. If so, is there a reason why I would want the S1300 instead of the cheaper S300? I just want a scanner for duplex document scanning, for home use (documents, receipts, etc.).

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• database on SSD: data only or the DBM program too?

  - by simone

  I plan on moving the data I use for statistical analysis (100-ish Gb) onto an SSD. The data is either sqlite single-file db's, or postgresql-managed data. The SSD is 240 Gb, 550 MB/s read and 520 MB/s write. Should I reserve that space for the data only, or would it be a good idea to install the operating system (Mac OS X) and the application directory (Adobe Suite, Microsoft Office and the like) on the SSD too? And would it make a substantial speed difference whether I also install the postgresql binaries on the SSD? I have plenty of other space (another 300Gb hard-drive, and a 1Tb one). Don't know the features of the non-SSD drives, though they're our standard equipment on all Macs, and they're definitely OK. Thanks.

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• Meta key in Terminal.app vs national characters

  - by yacoob

  I'm using Terminal.app, and I'd like to use emacs running inside - either locally, or after sshing to remote server. Problem is, I can't get working Meta modifier. Namely, if I enable 'Use option as meta key', Option key works like proper Meta, but I lose ability to enter Polish diacritics (aelósznzc), that are entered with right Option. If I disable 'Use option as meta key', my Meta is gone, but I can again use Polish characters. In this state they appear only with right Option modifier, so I guess it's Terminal.app's fault that it doesn't make a difference between left and right Option key, when the relevant preference is selected. What are my options then? Is there a good solution for my problem? I can always use ESC as a poor man's Meta replacement, but I don't like that idea.

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• External HDD is always in use when trying to safely remove

  - by Mario De Schaepmeester

  I have a WD 1TB Elements external hard drive and every time I use the Windows 7 "safely remove" feature, it gives me a dialog telling that a process is using the disk. Using Sysinternals Process Explorer and the answer on this question (find everything with the drive letter) I get the following result: What is the $Extend folder and why is it in use? How can I disable it? I cannot remove it using the command line (access denied). Edit: I've followed the instructions over here and under the registry key HKLM\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToBackup I have a Multi-String Value named IgnoreNTFS with data \$Extend* /s But this does not make any difference. Also this question is not about a server. Additionally I can tell that I use a program called mkv2vob to convert video files with a Matroska container into something my PS3 will play. I convert the source files straight from my external HDD, but I would expect if this program does not release the lock on the HDD, surely it cannot be locked if the process isn't even running?

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• Why can't I run virtualenv without root?

  - by James

  I'm trying to run virtual env and all the documentation says I don't need to run it as root (and probably shouldn't). If I run it as root, everything works. If I run it without root, I get: [stats@crunch ~]$ virtualenv env Traceback (most recent call last): File "/usr/bin/virtualenv", line 5, in from pkg_resources import load_entry_point File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 2655, in working_set.require(requires) File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 648, in require needed = self.resolve(parse_requirements(requirements)) File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 546, in resolve raise DistributionNotFound(req) pkg_resources.DistributionNotFound: virtualenv==1.7.1.2 I believe I can change the ownership and it's the same difference, but I'd like to know why this is happening. It's a fresh CentOS 6.2 installation.

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• Is there a rule of thumb for RAM upgrades?

  - by Retrosaur

  I'm having a hard time figuring out whether or not a certain laptop/computer's RAM can be upgraded or not. Is there a rule of thumb that determines how much max RAM one could add to a system without looking it up via external websites? A little bit of a background information: I work in computer sales at a computer electronics store, so it is virtually impossible for me to install any sort of software that would detect computer specs, and I get a lot of customers who wonder what laptop/desktop RAM upgrades usually are. Is there a certain rule that adding more RAM entails? Does it make a difference if it's a 32-bit or 64-bit machine? OS?

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• Serving static files fails - nginx

  - by Sergei

  Hi, I've been looking and trying around all night, but without success. I configured nginx to serve my static files and proxy all the other traffic: server { listen 80; server_name mydomain.com; access_log /home/boudewijn/www/bbt/brouwers/logs/access.log; error_log /home/boudewijn/www/bbt/brouwers/logs/error.log; location / { proxy_pass http://127.0.0.1:8080; include /etc/nginx/proxy.conf; } location /media/ { root /home/boudewijn/www/bbt/brouwers/; } } The proxy passing is no problem, but when I go to mydomain.com/media/ or try to access any testfile over there, it's without success. I paid attention to the difference between root and alias, my media folder exists, I paid attention to the trailing slashes, but still I get a 404 when trying to access my static media files. Any help?

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• WIFI: iPhone/iPad getting much slower bandwidth than laptop

  - by Sam

  I just got cable internet installed (Comcast). It claims that my down speed should be 25mbit. Over wifi, I get close to that on my laptop, but only about 8 on average with my iPhone/iPad. I'm using testmy.net in the browser on all devices. I have an ARRIS / Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem and a Medialink Wireless N Broadband Router. I read somewhere that disabling WMM and the firewall on the router would help (is this even a safe idea?). I've tried both, and neither seem to make much of a difference, if any at all (sidebar: I've noticed that my download speeds vary wildly with cable internet... on my laptop, I'll get 12 down, then 22 five minutes later. Is this typical for cable internet?).

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• What is Light Peak

  - by Jonathan.

  I've heard this a lot recently, todo with Apple and Intel. Some says it's a protocol, others say it's fibre optic, and others say it's copper. One source even said it was a "wireless wire". Apparently it can carry data, but not video streams, surely the cable can't know the difference between 1s and 0s representing data, and 1s and 0s representing video streams. Or it will replace all the wires we currently have except power, another place said it is for inside laptops. Those are just examples so I haven't given any sources, I just want to know what on Earth Light Peak is?

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• Navigation keys on numeric keypad randomly stop working

  - by Tom Hughes

  Shortly after a restart, the arrow and navigation (Home, End...) keys on my numeric keypad will randomly stop working, and -- regardless of the state of the NumLock -- return only numbers. I notice this the most in browser applications (like this edit box) but the same effect is true on the command line and in desktop applications like Word. I swapped keyboards and now use a Microsoft keyboard (both are USB keyboards) but the same behavior persists. I also tried a clean boot to clean out startup programs but this made no difference. The separate arrow keys and navigation keys between the QWERTY keys and the numeric keypad work fine, but my strong preference (dating back to DOS and MS Flight Simulator) is to use the navigation keys in the numeric keypad.

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• Getting 0x80070043 error when accessing Samba share from Windows 7

  - by FelixM

  I created a Samba share on my new Ubuntu 10.04 machine. When I try to access it from a Windows 7 client, I get network error 0x80070043 (The network path not found). However, I get this error when I click on the share in the Windows Explorer, so it seems that Windows does find the path. I already enabled NTLMv1, disabled 128bit security and made sure that NetBIOS is running. I briefly disabled the Windows firewall, it didn't make a difference. What could be the problem?

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• Video compression artifacts in Flash

  - by lvanderhart

  This only started happening in the past two days, which seems very odd to me. Everything worked flawlessly up until now, and I use my my computer as my primary TV. Flash video from Hulu and Amazon, for no apparent reason, now have lots of artifacts in them. Some scenes are ok, but some are completely scrambled and unwatchable. My connection is a 15mb fios, and bandwidth tests indicate my connection speed is ok. I've tried the latest production version of Flash, as well as the 10.1RC4. Same problem. Enabling or disabling hardware acceleration in Flash makes no difference (with the scrambling issue, quality is better overall with hardware). Using a different H264 codec doesn't clean up the issue, although the scrambling does look different. I'm kind of stumped. The only thing I can think of now is to reinstall windows, which is obviously a drastic step. Edit: Forgot to say: Windows 7, Athlon 64X2, Geforce GTS 250

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• KVM switching on the cheap

  - by Stuart Hemming

  I have a machine at home for my personal use. I also have a machine for work. I have a pair of DVI monitors. An ideal set up for a KVM switch. Sadly the cheapest switch I can find that will switch 2 DVI monitors is nearly £300. However, I can get, for just £40, a switch for a single monitor. Is there any reason why I couldn't employ 2 of these much cheaper switches? My thought was to have the keyboard, mouse and one of the monitors in one switch and just the 2nd monitor in the 2nd switch. Logically, I can't think of a reason why this wouldn't work, but I have no real background to be able to say, definatively, whether or not it would. It it makes any difference, both machines are running Win7. Appreciate any thoughts. -- Stuart

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• Is there anyway to build a raid system without all drives?

  - by xenoterracide

  I'm building a raid1 (ok it will probably be a raid10,f2 but the difference with 2 drives... isn't much) system with 2 1TB drives. However, 1 of the drives I've ordered is bad so I'm RMA-ing it. I'm wondering if I could partition and install to the 1 drive and then rebuild the array when I get the second drive (after I test it of course) My initial investigation doesn't show me a way of creating the array without specifying all devices... and the device the second drive will be is one that has data that I will need to migrate (plus it's not big enough). Is it possible that I could create an array without specifying all devices? or specify false ones and reconfigure to the right ones later? Or some other method I'm not thinking of.

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• How to set up Windows server 2008 to receive email?

  - by Saul

  First off apologies, I'm from a medical background not a networking one, but I've got roped into setting up a windows 2008 server. So far web server running, fixed IP address assigned (within a large private network of the National Health Service in the UK if that makes any difference) and the network team have assigned a DNS entry for me which works, so the server can be addressed as nww.myserver.nhs.uk I've only got ports open on the router for 80 and 443 (http and https) at the moment, so presume I need a different port to enable email services. My need is to be able to accept an email to the domain name like [email protected] in order to pick up a confirmation mail from an SSL issuer (Comodo) I guess to confirm that I control the domain. After that I don't actually need mail services on the server. I see lots of stuff about setting up SMTP services but thought that was about mail out and re-routing, but how do you get the server to "listen" for mail to the domain (assuming I open port xyz or whatever it is) ?

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• Is there a way to create a consistent snapshot/SnapMirror across multiple volumes?

  - by Tomer Gabel

  We use a NetApp FAS 6-series filer with an application that spans multiple volumes. For backup purposes I would like to create a consistent snapshot that spans these volumes at the same point in time (or at least with an extremely low delta); additionally, we'd like to to use SnapMirror to replace the production environment to test volumes. The problem is in creating a consistent snapshot/SnapMirror, since these commands are not transactional and do not take multiple parameters. I tried scripting consecutive "snap create" or "snapmirror resync" commands via SSH, but there's always a 0.5-2 second difference between each snapshot. It's currently "good enough", but I'm seriously concerned about the consistency impact with increased load (we're currently in pre-production). Has anyone managed to create a consistent snapshot that spans several volumes? How did you pull it off?

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• Switch user from locked screensaver?

  - by desert69

  I'm having the same problem as this, but the answer from there doesn't work for me. Neither in my iMac upgraded from Lion to Mountain Lion (currently at 10.8), nor from a Mac Mini with Lion Server (10.7.4). I have "Show fast user switching menu as" enabled at "Users & Groups" Login Options, but when I have to login from screensaver, there's no option to switch user. How can I enable such an option? EDIT: I think I forgot to mention that we believe (just guessing) that it has to do with network accounts. We use network accounts here, and have that issue. My boss says he could solve this issue at his house's Mac, which don't use network accounts. Does it make a difference?

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