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Articles indexed Monday March 14 2011

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• Enabling Hyper-V Integrated Services Time Sync Services versus Internet Time Synchronization

  - by cpuguru

  Should I deselect the "Synchronize with an Internet Time Server" checkbox under the VM's "Date and Time - Internet Time Settings" tab if the "Time Synchronization Service" for a Hyper-V-based Virtual Machine is enabled? One of the Integration Services that Hyper-V provides is the Time Synchronization Service, which can be enabled/disabled by going to a VM's Settings-Integration Services setting in the Management section. I believe this is checked by default. When you install a Windows Server 2008 OS in a VM on the Hyper-V server, it comes with the "Synchronize with an Internet Time Server" option set, pointing to "time.windows.com". I'd think that if the parent Hyper-V server is set to one time server, and the child VM is pointing to a different time server, there would be a momentary blip if the two are not spot on with their times when the synchronization services run. So the question is, which time sync service should I use? I'm assuming not both. And what is the advantage of one over the other? Note: This question assumes that the machines are not joined to a domain. If they were, the machines would also try to update their time against the domain controller with the primary domain controller role too, right? Thanks!

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• nginx static files caching doesn't work

  - by user74344

  here is my conf file: usr/local/nginx/sites-available/default server { listen 80; server_name localhost; location / { root html; index index.php index.html index.htm; } # redirect server error pages to the static page /50x.html error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } # serve static files directly location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico|swf)$ { expires 30d; } but it doesn't cache static files, how should I fix it? thanks a lot

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• Which apache/mysql/php package is best for windows?

  - by crosenblum

  I have tried appservnetwork, was the best so far, but I haven't seen them do an update in ages, EasyPHP is just slow to load always. Wamp and Xamp, all put in their description that is not for production. I do not plan to host publicly this site or site's I am working on. But I do want a fast loading apache/mysql/php server for development purposes. I used to really like WLMP, which is Lighttpd for Windows, but that project seems unupdated or abandoned. I refuse to use IIS, but i have no desire to get into any wars over it. I run windows xp sp3 at my home pc. I will need to have a web server setup for professional work, as well as some fun websites I am working on. I just want it fast enough, so i can run it via localhost, and not take forever to load in the browser. Thank you... I plan mostly do php programming and perhaps coldfusion via this.

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• Logging Bounced messages to a Database (Postfix with virtual domains/users)

  - by Gurunandan

  We have a postfix installation with a couple of virtual domains each with virtual users. These domains and users are mapped using a mysql database. I have been until now tracking bounces by parsing the postfix log file. I suspect there must be better and more efficient ways of doing this. I thought of three but I am not sure what is best: Write a Postfix content filter that logs the bounce and throws away the mail Use procmail - but I am not sure how procmail would work with virtual users who have no $HOME defined Write a script that POPs mail from mailboxes; parses and logs them and deletes the bounced email I would appreciate advise on which would be best from a maintenance point of view and efficient from conserving server resources point of view. Thanks

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• Storage subsystem borking after server restart (all on a Parallel SCSI bus)

  - by Dat Chu

  I have a server (with a SCSI HBA) connected to two Promise VTrak M310p RAID enclosure on the same bus. Everything is working fine until I have to restart my server. Once restarted, the server can no longer communicate with the enclosures: lots of read errors and bus resets. I have to turn off both enclosure, then turn off the server, then turn on the enclosure, then turn on the server for things to work. I don't believe this is the normal behavior, what could I be missing?

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• Network monitoring tools with API features

  - by Kev

  We use ks-soft's Advanced Hostmonitor package to monitor around 2000 items on our network. We think it's great, the chap that supports it is fantastic, the product is fast, stable and mature but I feel as as we grow as a company it's beginning to show some friction points in the area of integration with our back office admin systems. One of the things we'd like to do is be able to add new tests to whatever monitoring tool we use via an API. For example, when orders for servers come from our retail interface, the server gets built automatically, and as part of the automated build process we'd like to automatically add new tests to the network monitoring systems. Hostmonitor has some support for this via a feature called HM Script but we're starting to encounter some speedbumps - we can't add new operators/users we can't define new "Action Profiles" - these are the actions to be taken when a test goes good or bad. What we love about hostmonitor though are the Action Profiles. For example if a Windows IIS box goes bad our action profile for a bad test does something like: Check host again (one time) Wait another 30 seconds then test again Try restart app pool on remote machine (up to two times) Send an email to ops about the restart failure Try restarting IIS on remote machine (up to four times) Page duty admin (up to 5 times - stops after duty admin ACKS alert) Page backup duty admin (5 times - stops after duty admin ACKS alert) I'm starting to look around at other network monitoring tools and I'm looking for: a comprehensive API to be able to add/remove/control tests/test "action profiles"/operators (not just plugins, we need control and admin interfaces) the ability to have quite detailed action/escalation profiles (and define these via an API) I've looked at Nagios and Icinga but Ican't seem to glean from their documentation whether we could have these features or not, or if we could, how much work would be involved to implement/customise. Can anyone provide any advice, guidance or experiences?

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• VMware virtual machine network devices malfunctioning

  - by sheepz

  I'm running Ubuntu 10.04 LTS and VMvware workstation 7.0.1 build-227600. The virtual machine i'm running in VMware is a custom distribution built on Debian Linux version 3.1. I'm still pretty much a beginner with UNIX administration. After having messed around with the vmware (changed only the name of the folder, the vmx and and other .v* files accordingly in which the .vmx was situated, and the configuration in the vmx file accordingly), the network devices on the virtual machine do not work anymore. The virtual machine is used for securely sending messages. The virtual machine: As far as I know, this perl file called proxy-gen-ifalias eth0 is responsible for properly setting up the two virtual network devices eth0 and eth1. The Virtual machine comes with a GUI interface in which I have set up two ethernet network devices, one internal, the other external. Now, after having messed around with this, the UI gives me this error message: perl proxy-gen-ifalias eth0 /etc/modprobe.d/alias-eth0 /sbin/update-modules perl proxy-gen-ifalias eth1 /etc/modprobe.d/alias-eth1 /sbin/update-modules ifdown eth0 ifdown: interface eth0 not configured ifdown eth1 ifdown: interface eth1 not configured perl proxy-gen-netcfg /etc/network/interfaces ifup eth0 SICCSIFADDR: No such device eth0: ERROR while getting interface flags: No such device SIOCSIFNETMASK: No such device eth0: ERROR while getting interface flags: No such device Failed to bring up eth0. ifconfig eth0 eth0: error fetching interface information: Device not found make: *** [/etc/network/interfaces] Error 1 ~ Here are the contents of the two perl files referred to in the message: paste.pocoo.org/show/2AMzAYhoCRZqlGY7wUFk/ proxy-gen-netcfg

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• Blocking nslookup on A record

  - by msher420

  Need to know which port to be blocked in my local machine so that the nslookup on A record doesnot work? To know the above i need to understand how the lookup on A record how does the request go from the local machine (port) to the nameservers/ rootservers? For example: C: nslookup -type=a google.com Server: MyDslModem.local.lan Address: 192.168.1.1 Non-authoritative answer: Name: google.com Address: 209.85.231.104 Here which from which local port from the local machine does the lookup starts from?

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• HAproxy - Redirect issue - Uri Variables ?

  - by Justin

  I'm using haproxy 1.5dev3 and I was wondering if there is any possible way to grab uri variables from a request to reappend the query on the end of a redirect url? What I'm trying to do is redirect from: http://www.domain.com/page/example.htm?id=1234567 to: http://www.domain.com/frame/newpage.cfm?id=1234567 redirect prefix doesn't work properly as it tries to append /page/example.htm to the end of the redirect url. Can I do some sort of rewrite to accomplish this? It would be awesome if you could use uri and queries as variables for redirection/pool selection like on F5. Please help...Thanks!

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• Set a login with username/password for SQL Server 2008 Express

  - by Ewald Stieger

  I would like to set a password and username for connecting to a server with SQL Management Studio 2008. I set up SQL Server 2008 Express on a customer's computer to host a DB used by an Access 2007 app. The customer should not be able to access the DB or connect with SQL Management Studio. How do I set up a login and remove any logins that allow a user to connect via Windows Authentication and without entering a username and password? I have not much experience with logins and controlling access.

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• jQuery dialog open causes page to continuously lengthen in IE [closed]

  - by Michael

  I made my first dialog and AJAX work in jQuery and finally got everything working great - the dialog has a few buttons, cancel, save, and generate to get a new random string from the server. The problem is when I make the dialog modal (graying out the rest of the window), then in IE the scrollbars appear and sometimes keep moving as the page continuously extends down. This happens whenever the dialog is opened (it's not initially set to open) but not everytime. I can't think of any part of my code that would do this as I don't even have a JS loop anywhere. Googling for this didn't help. It seems like an IE vs jQuery quirk but any ideas?

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• How can I expire non-active sessions on my Netscreen SSG140?

  - by David Mackintosh

  I have a Juniper Netscreen SSG-140. While experimenting with a VoIP service, I defined a custom policy that was to be used to permit the possible ports in use to be sent back to the VoIP server from systems connecting across the internet. Because I'd had problems in the past with VoIP systems getting broken when their UDP sessions were expired out faster than their keep-alives were generated, I set the timeout on this custom service to be 'never'. After much experimentation, I happened to notice that my session count on the firewall has grown from a couple thousand to over 36000. After discussion with the VoIP "expert", I set the timeout to be 30 minutes; however, all the sessions set up during the experimentation process are still there, more than 3 days later. Is there a way I can force these old sessions to get expired and removed from the session table, or am I looking at resetting my firewall? (Both firewalls, actually -- they are in a cluster.)

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• Uknown nginx Error Messages

  - by Sparsh Gupta

  Hello, I am getting some nginx errors as I can see them in my error.log which I am unable to understand. They look like: ERRORS: 2011/03/13 21:48:21 [crit] 14555#0: *323314343 open() "/usr/local/nginx/proxy_temp/0/95/0000000950" failed (13: Permission denied) while reading upstream, client: XX.XX.XX.XX, server: , request: "GET /abc.jpg 2 HTTP/1.0", upstream: "http://192.168.162.141:80/abc.jpg", host: "example.com", referrer: "http://domain.com" 2011/03/13 22:00:07 [crit] 14552#0: *324171134 open() "/usr/local/nginx/proxy_temp/1/95/0000000951" failed (13: Permission denied) while reading upstream, client: XX.XX.XX.XY, server: , request: "GET mno.png HTTP/1.1", upstream: "http://192.168.162.141:80/mno.png", host: "example.com", referrer: "http://domain2.com" I also looked at these locations but found that there is no file by this name. root@li235-57:/var/log/nginx# /usr/local/nginx/proxy_temp/1/ 00/ 01/ 02/ 03/ 04/ 05/ 06/ 07/ 08/ 09/ 10/ 11/ 12/ 13/ 14/ 15/ 16/ 17/ 18/ 19/ 20/ 21/ 22/ 23/ 24/ 25/ 26/ 27/ 28/ 29/ 30/ 31/ 32/ 33/ 34/ 35/ 36/ 37/ root@li235-57:/var/log/nginx# ls /usr/local/nginx/proxy_temp/0/ 01/ 02/ 03/ 04/ 05/ 06/ 07/ 08/ 09/ 10/ 11/ 12/ 13/ 14/ 15/ 16/ 17/ 18/ 19/ 20/ 21/ 22/ 23/ 24/ 25/ 26/ 27/ 28/ 29/ 30/ 31/ 32/ 33/ 34/ 35/ 36/ 37/ Can someone help me whats going on / how can I debug this more and better fix this Thanks

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• Windows 7 does not recognise second display output [closed]

  - by gilles27

  I've got a PC with dual BenQ G2222HDL monitors and an ATI Radeon HD 4650 video card. I've been running both monitors at 1920x1080 for some months now but last week the second monitor switched to a lower resolution and won't let me go back to 1920x1080. If I right click the Desktop and choose Screen Resolution from the menu, I get two items in the Display: drop down list BenQ G2222HDL D-SUB Display device on: VGA In the past 2 was always the same as 1. If I click Detect a third item appears Available display output on: ATI Radeon HD 4650 but if I use the Multiple displays: drop down list to use it says "No display detected" and then lets me choose from either "Connect anyway on S-Video" or "Connect anyway on Component", neither of which help. It seems like Windows 7 recognises the card is dual-head, and knows I have got two monitors, but can't link it all together. I have checked and all my drivers are up-to-date. Does anyone have any suggestions as to how I can get the second monitor working properly again?

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• Setting up nginx on Ubuntu?

  - by Industrial

  Hi everyone, I've just setup a VPS running Ubuntu server 10.10 as a test environment to run with nginx. This far i've ran apt-get install nginx php5 php5-cgi and accessed the IP of the VPS with a browser which outputs It works, so it should be ready to run. Never having worked with nginx in the past, I have no idea on what to do next. How should I config my nginx install to run properly as a staging server in my LAN? Apparently, there's multiple configs for nginx including sites-default and nginx-default making me really confused.

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• Linux SW Raid: whole disk or per-partition?

  - by Steve Pomeroy

  I have inherited a machine which has 2 physical disks and uses Linux SW RAID(1). Both disks are partitioned and are are all individual arrays (/dev/md0, /dev/md6, etc.). Those arrays are then mounted (/boot, /home, etc. even /tmp). As RAID is designed to mitigate physical failures, is there any reason why one would use this technique over whole-disk arrays that are then partitioned (perhaps using LVM)? This seems prone to more potential issues, but may have some special properties that I haven't been able to glean. I'm planning on moving this setup to: disks?SWRAID(1)?LVM as I'll be making multiple VMs out of the one machine, but wanted to make sure I knew what I was doing when I got rid of the old setup.

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• HP SmartArray P400 has slow read and write speed

  - by Tadas D.

  I have desktop in which I installed HP SmartArray P400 controller with two HP DF0146B8052 hard drives. I made RAID0 logical volume from them, but I am getting 20MB/s write speed and ~140-120MB/s read speed. Also there is quite low scatter for benchmark results (I am getting quite nice line) and it looks like controller is "capping" my speeds. I tried reseting controllers configuration and I haven't found any settings in HP ACU (Array Configuration Utility) to help me. I am using Windows 7 Ultimate and M4A78 board Does anyone have ideas what could be wrong? Also I am attaching diagnostic results.

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• How to use a retail Windows 7 Professional license key to upgrade an installed Windows 7 Home Premium machine

  - by jalperin

  I purchased a retail version of Windows 7 Professional and installed it on a computer. That machine has died, and I replaced it with a new computer which came with Windows 7 Home Premium already installed. I'd like to have Professional, not Home Premium, on the new machine, and I don't want to pay for an "Anytime Upgrade" because I already have a valid Windows 7 Professional license (for the dead computer). Is there a way to legally upgrade using my Professional license key? I've already installed programs, data, etc on the new machine, so I don't want to reformat and start from scratch.

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• Windows 7 does not recognise second display output

  - by gilles27

  I've got a PC with dual BenQ G2222HDL monitors and an ATI Radeon HD 4650 video card. I've been running both monitors at 1920x1080 for some months now but last week the second monitor switched to a lower resolution and won't let me go back to 1920x1080. If I right click the Desktop and choose Screen Resolution from the menu, I get two items in the Display: drop down list BenQ G2222HDL D-SUB Display device on: VGA In the past 2 was always the same as 1. If I click Detect a third item appears Available display output on: ATI Radeon HD 4650 but if I use the Multiple displays: drop down list to use it says "No display detected" and then lets me choose from either "Connect anyway on S-Video" or "Connect anyway on Component", neither of which help. It seems like Windows 7 recognises the card is dual-head, and knows I have got two monitors, but can't link it all together. I have checked and all my drivers are up-to-date. Does anyone have any suggestions as to how I can get the second monitor working properly again?

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• Arbitrary Key Remapping on a Mac

  - by Mason

  I bought a cheap Chinese replacement keyboard for my late 2007 MBP. The close square/curly bracket key actually sends a left control signal to the Mac. So I'm trying to remap my backslash/pipe key to be close square/curly bracket but I can't find the key remapping software to do it. Double Command and KeyRemap4Macbook can't do arbitrary key remaps and uControl/fkeys don't work on Snow Leopard. Anyone have ideas? I have no problem editing text config files if necessary.

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• Verification of files on backup media - after the backup

  - by Greg Sansom

  I have a system in place where I back up my work files daily to a portable hard drive. I actually have two portable hard drives - one is stored off-site and I swap them regularly. I also keep my family photos and other historical files backed up, but I only back the photos up occasionally (ie when I have new photos). The backup media is for backup only, and it is unlikely I will ever read the files from the backup media unless a disaster occurs and I lose the master. It worries me that my backed up files could become corrupt without me knowing it. It is also feasible that my master files could become corrupt, and eventually the corrupt files would be replicated to the backup media. I'm currently using Cobian Backup, but I'm open to alternatives. Is there a tool I can use to confirm that the backed up files are identical to the files that were first copied? I know it would be possible to generate a checksum and periodically validate the backup files against the original checksum, but I'm looking for a tool which will do this automatically.

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• Program to restore open windows after crash

  - by Noah

  Are there any programs (for PC) that will constantly monitor what programs and windows within those programs you have open, and then restore each of those windows in case of a crash/forced restart? (looking specifically for Outlook, but open to all ideas)? Something similar to Chrome's feature where after a crash, it says "Looks like Chrome didn't shut down properly. Would you like to restore your open tabs?"

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• Open source command line tools for indexing a large number of text files

  - by ergosys

  I'm looking for any open source command line tool or tools which will allow me to index and search a large number of plain text files. Approximate search would be a plus. The tool only needs to print the files that match, although some match context would be useful. A GUI tool isn't useful for my application, nor is anything that searches files one by one (grep for example). I'm basically targeting unix platforms (osx, linux, bsd). EDIT: I'm not interested in any sort of tool that is system-wide, or needs to run in the background. Basically, I want to build an index for a directory tree full of text files and then later be able to search against it. Preferably the index is one or a few files that I can specify the location of. Any ideas?

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• How safe is it to run CHKDSK on an SSD?

  - by Eilon

  I recently saw Windows 7 pop up a warning or two that I should run chkdsk on my laptop. My laptop came with an SSD and I'm not sure if there are any negative implications to running chkdsk on such a drive. Are there any potential issues with reporting "bad sectors" on the drive? I would imagine that the physical concept of sectors is completely different between a platter and a microchip. I don't think my SSD supports TRIM. It's about 14 months old and a quick web search seems to hint that it doesn't (though it's nearly impossible to find out this info for sure!). I'm also not sure if TRIM is even relevant here since there shouldn't be much in the way of deletes. So, how safe is it to run chkdsk on my SSD drive? The model of SSD that I have is reported as "Samsung SSD PB22-JS3 2.5".

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• I reinstalled OS X and the system was the same as before

  - by slhck

  Strange thing happened. I want so sell my old Macbook and therefore used a disk image of the Snow Leopard DVD that I restored onto an external drive. I booted off the drive and went through the installation steps. Now I really would like to perform "archive and install", as there might be some files that I need later, but I didn't see the option. The only options for installation I had, were, including others, optional printer drivers and Rosetta. So I just clicked through and I wasn't given any other option. After about 45 minutes, my system booted again, and voila, there was my old system. Nothing changed. How should I proceed to actually reset the system? All I have is that Snow Leopard DVD image.

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