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• Justifying a memory upgrade

  - by AngryHacker

  My employer has over a thousand servers (running SQL Server 2005 x64 and a couple of other apps) all across the country. And in my opinion they are all massively underpowered for what they need to do. Specifically, I feel that the servers simply do not have enough RAM for the amount of volume the machines are asked to do. All the servers currently have 6GB of RAM. The users are pretty much always complaining about performance (mostly because, immo, the server dips into the paging file quite often). I finally convinced the powers that be to at least try out a memory upgrade on one box and see the results. However, they want before and after metrics, so that they can see that the expense will be justified. My question is what metrics should I collect to see whether the performance truly improves on the box? I am a dev, so I am not sure how and what to collect (i have a passing knowledge of Perfmon).

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• OpenSSH SFTP server with chroot() + user with chroot exception

  - by HannesFostie

  I am currently setting up an SFTP server but there is one detail I can't seem to figure out. When I add a user, I would like him to connect using his client and be able to write in his "root dir" right away. My Match case for the SFTP-users group currently has ChrootDirectory set as "/home/%u", and inside that directory I have to have a subdirectory owned by the user, while /home/%u itself is owned by root. Next to that, the "root dir" also has a couple files, .bashrc to name one. Is it possible to put these files somewhere else, remove them, or at least make them invisible to the user? Thanks EDIT: One more little thing I'd like to implement is for one account to have read (or rw, not sure yet) access to all other users' home directories. What is the easiest way to implement this? EDIT 2: Basically, having one user be an exception to the chroot rule would get me started.

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• Windows 7 Default Gateway problem

  - by Matt

  Hi, I have a strange problem (or at least seems strange to me) the below are IP configurations for two laptops on my home network which consists of a main router 192.168.11.1 and a connected wireless router (i know this can cause problems but has always worked until I got the win7 machine) at 192.168.11.2 with DHCP disabled. Laptop 1 - Win XP IP: Dynamically assigned by main router default gateway: 192.168.11.1 (main router) This machine gets perfect connectivity. Laptop 2 - Win7 IP: dynamically assigned by main router Default Gateway: 192.168.11.2 THIS IS THE PROBLEM... I cannot seem to get this machine to default to the main router for the gateway UNLESS I go to a static configuration which I would rather not do since I regularly go between my home and public networks. Why is my Win7 machine not finding the main gateway the same way that the other laptop is? I believe that the rest of my setup is fine as it has always worked and it works perfectly when set as static ip and gateway. Please help! Thanks

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• Dell PSU Compatibility: Dell Inspiron 530 (Desktop)

  - by ashes999

  I have an Inspiron 530 with a stock PSU. I need to upgrade it to meet my video card's needs (AMD HD6770), which demands at least 450W, to potentially fix BSODs with the latest version of the drivers (so claims AMD support). Now, I've heard conflicting reports about whether Dell uses special/proprietary PSUs. (Examples for aye and nay to special PSUs.) How exactly can I determine if a PSU is compatible with my PC, before buying it? I assume I will not be able to return it if it doesn't fit, or makes my computer explode in a fireball of doom.

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• How can I set audit controls on files owned by TrustedInstaller using Powershell?

  - by Drise

  I am trying to set audit controls on a number of files (listed in ACLsWin.txt) located in \%Windows%\System32 (for example, aaclient.dll) using the following Powershell script: $FileList = Get-Content ".\ACLsWin.txt" $ACL = New-Object System.Security.AccessControl.FileSecurity $AccessRule = New-Object System.Security.AccessControl.FileSystemAuditRule("Everyone", "Delete", "Failure") $ACL.AddAuditRule($AccessRule) foreach($File in $FileList) { Write-Host "Changing audit on $File" $ACL | Set-Acl $File } Whenever I run the script, I get the error PermissionDenied [Set-Acl] UnauthorizedAccessException. This seems to come from the fact that the owner of these files is TrustedInstaller. I am running these scripts as Administrator (even though I'm on the the built-in Administrator account) and it's still failing. I can set these audit controls by hand using the Security tab, but there are at least 200 files for which doing by hand may lead to human errors. How can I get around TrustedInstaller and set these audit controls using Powershell?

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• I cannot install KB 968211 "this update is not applicable to your computer"

  - by Kirby

  I have Windows 7 Professional SP1..64bit... and yes windows genuinely activated. I want to install Windows Media player 12 and it seems i require the "Media Feature pack"... I can't seem to find a good install. I've tried at least 4 of them.. both 64bit and x86. I've googled the bejesus out of this... https://www.microsoft.com/download/en/details.aspx?id=16546 Any help would be greatly appreciated. TIA, Kirby

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• Looking for a USB Thumbdrive / Flash drive encryption solution (not TrueCrypt)

  - by Max888

  I am looking for a USB Thumbdrive / Flash drive encryption solution. I have searched the net but I have never come accross a solution which meets the following: Must handle at least 4GB volume If possible, fully portable (no install required required) Does not require admin rights in order to access/write encrypted files on the flash drive Does not corrupt data should the flash drive is removed from a USB port and the data is in a 'unencrypted' status Data is automatically encrypted if the flash drive is removed from a USB port and the data is in a 'unencrypted' status Portable apps must be able to run from the 'unencrypted' volume (in non-admin mode) PLEASE do not mention TrueCrypt as I am not considering (especially for wish list #3) Many thanks! Update 5th October 2009: Still unresolved.

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• NetApp and SQL Server?

  - by Edinor

  Do you have any good or bad experiences to share running SQL Server OLTP Systems on NetApp appliances? I have been working with a small, relatively low-volume cluster with a lower-end NetApp device, and I have found the environment to be generally unstable, at least compared to my experiences with other SANs, iSCSI arrays, and DAS setups. I struggle to believe that RAID DP and WAFL are more than fairy-dust technologies. A solution has been proposed to me that I just need a bigger, better NetApp, with PAM cards and other cool technology I've not heard of, and I feel like I would be better off spending a quarter of that on good direct-attached drives and a beefy server. At the same time, I feel that an Enterprise-class SAN should be something I can count on to be consistently a more stable, better performer than the less expensive solution I might propose. Are you a SQL Server DBA in an OLTP environment and love your NetApp? If you don't like them, why not?

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• Mercurial SSH process blocks when run from Local System

  - by Liedman

  We are using Mercurial over SSH for our development. We use Hudson for continous integration, and have deployed it on Tomcat, running on a Windows 2003 Server using the Local System account. Mercurial is configured to use Putty's plink.exe as its ssh command in Mercurial.ini, together with a private key for SSH authentication. When Hudson attempts any Mercurial command over SSH, the operation just blocks. I can see the three processes being started: hg.exe, cmd.exe and plink.exe. On the remote machine, I can also see the SSH session being opened and the authentication key being accepted. After that, nothing appears to happen, and everything just blocks, seemingly forever. (As a side note, subversion/SVN over SSH works from Hudson to the same server, using the same user and authentication key). A solution would of course be the best, but at least a hint for how I should debug it to get further would be nice, since I'm stuck and haven't even got an error message right now.

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• How to enable CDR on AsteriskNow 1.5

  - by Michal Niklas

  I have upgraded PBX to Asterisk 1.6.2.7 and now CDR files are not created. It looks that such logging is disabled: Connected to Asterisk 1.6.2.7 currently running on pbx2 (pid = 5824) Verbosity is at least 3 pbx2*CLI> cdr show status pbx2*CLI> Call Detail Record (CDR) settings ---------------------------------- Logging: Disabled Mode: Simple Asterisk shows that CDR modules are loaded: pbx2*CLI> module show like cd Module Description Use Count cdr_manager.so Asterisk Manager Interface CDR Backend 0 cdr_csv.so Comma Separated Values CDR Backend 0 app_cdr.so Tell Asterisk to not maintain a CDR for 0 app_forkcdr.so Fork The CDR into 2 separate entities 0 func_cdr.so Call Detail Record (CDR) dialplan functi 0 cdr_custom.so Customizable Comma Separated Values CDR 0 6 modules loaded How to enable creating CDR csv files?

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• Mail server responds with Error 500 line too long

  - by mawimawi

  I am occasionally receiving error messages from mail servers with the above message. It seems that at least one line in the e-mail has more than 999 characters and therefore the e-mail is bounced. Is this "by design"? in an RFC? Or some weird pseudo-spam-filter? Or just a bad mailserver? I googled around a bit but did not find a competent answer. Hopefully one of you guys can enlighten me.

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• DNS Help (CNAMEs and A Records)

  - by Aaron Francis

  I'm trying to set up my DNS properly so that I can have hosting through PHPFog and email services using MailGun. PHPFog has us redirect the naked domain to the www and then use a CNAME to point the www to PHPFog and mailgun provides the MX records to use. The problem I'm having is that I have no A record set up on Hover because when I do, the CNAME no longer works (?), or at least it seems that way because I am no longer seeing my site from PHPFog, I'm seeing a Hover landing page. I know all the records I need, I just can't seem to get them to play nicely together. I've been told Amazon's Route 53 should be able to solve my problem, but I haven't yet figured out how. I just need to have hosting at PHPFog and email services through MailGun. As you can probably tell, I have only a very limited understanding of DNS, so forgive me if this is a silly question.

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• Configure FastCGI for Python

  - by Rob

  I have nginx running on a VM and I want to run a Trac site. I need to run a python FastCGI server, but I cannot tell which is the server to use. I have found the following: <a href="http://redmine.lighttpd.net/projects/spawn-fcgi">Lighttpd spawn-fcgi</a> But this seems to require that you compile lighttpd just to get the fcgi server, which is weird. <a href="http://svn.saddi.com/py-lib/trunk/fcgi.py">fcgi.py</a> But this one seems to be depreciated. At the very least it is poorly documented. <a href="http://trac.saddi.com/flup">flup</a> This one comes with dependencies on ubuntu (python-cheetah{a} python-mysqldb{a} python-webpy{a}) that seem unnecessary. Also poorly documented. Are their any recent guides for setting this up. Trac's own FastCGI setup page seems to miss some steps.

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• Build a RAID-5 USB Array or NAS?

  - by TK Kocheran

  I'm looking to build a RAID-5 or RAID-6 hard disk array to be used as a centralized backup location for my home network. I have a lot of 4-8GB DVD ISO files which I intend to serve over the network to my TV using DLNA or something similar. I need decent write times, fast read times, and preferably a way to connect this array to my network router over USB. I'll probably be using ext3/4 on it (I'd use btrfs if my router supported it :-[). Is there a way to build a RAID array that is accessible over USB? I'm kind of new to this and most guides assume you're running a RAID array inside your machine. I need at least 5TB of space, and I need redundancy, so I prefer RAID-6. How can I go about accomplishing this?

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• How should i setup my PC partition?

  - by acidzombie24

  I want to clear out my PC and setup the partitions. Right now i have it as XP, Win-7, Vista, XP/Test/Spare I notice my PC is pretty good at virtualization, at least virtualizing linux. I also rarely boot out of my primary XP although i do find myself deving on windows 7 once in a while. So i figure i can have it as XP, Windows 7, data partition then... what? i still have one more slot. There may be a more useful way to do this so what do you guys think? My bro has 2gb partition that is used to restore the OS which can be ran during the bootup process. However i dont think i can do that with mine. So, what are you thoughts?

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• Windows Updates - Does Not Install, how can I remove it

  - by Kanini

  Everytime I shutdown my Windows XP, it comes up with the following screen which says "Turn Off with Installing Updates" (Of course, it also gives me an option as follows, "Click here to turn off without installing updates.") Now, when I do normal shutdown asking it to Install Updates and Turn it Off. It does not install the updates and every subsequent time I try to shut down the PC, it still comes with the prompt "Turn Off with Installing Updates". I managed to find out that this install was this "Installing Microsoft SQL Server 2005 Express Edition Service Pack 3 (KB955706) update 1 of 1 .... " Now, when I click on the Installing Updates icon (the yellow icon, that appears on the task bar near the clock), and Install it. It tries to install and it fails. Now, why is this install alone failing? Second, if we are not able to ascertain why this is failing, can we at least ensure that it is removed from the list of possible installs so that everytime it does not ask me to install it.

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• Self-powered USB hub and power supply adapter ampere capacity

  - by galacticninja

  I am looking for a power supply adapter for my USB Hub so it can support at least 2 bus-powered external hard drives. The hub's rating is 5 volts, 2 amperes. I would like to know if it would be OK to buy a power supply adapter rated at less than 2A. I've been looking for power supply adapters and the ones that do support 2A are more expensive (more expensive than the USB hub itself) compared to those that support less than 2A. Will power supply adapter that supports less than 2A (~1-1.5A) work fine to support two external hard drives? The external hard drives are both bus-powered Western Digital My Passport Essentials 250 GB. The OS is Windows XP SP3.

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• pcap stream rotation and pruning

  - by pilcrow

  Some of my servers collect a lot of packet data. Is there a utility (or patch to tcpdump(1)) to log a pcap stream to disk which: Rotates based on size of data written Prunes written files, keeping only the N most recent Does not re-use output filenames Is self-contained (Ruling out, e.g., a rotation with external pruning via crond(8)+tmpwatch(8)) Basically I want a multilog or svlogd that groks the pcap record format. The -W filecount option of tcpdump-4.0.0 "prunes" by recycling old filenames, which violates #3 above, forcing me to consult mtimes to determine recency and providing no guarantees against surprise truncation of the log file. The -G option introduces strftime(2)-specifier support in output filenames, which would give me at least second-precision in file names, but I can't figure out how to get pruning to work with this scheme.

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• Weird files in User folder

  - by Nano8Blazex

  In my user folder (C:/Users/myAccount/) theres a set of interesting hidden files that I've never seen before (right now it's a fresh install of Windows 7 Ultimate). These are: NTUSER.DAT, ntuser.dat.LOG1, ntuser.dat.LOG2, and NTUSER.DAT(whole chain of numbers and letters).TM.bif, NTUSER.DAT(whole chain of numbers and letters).TMContaineretcetc.regtrans-ms, and another similar one. When I try to delete them, it says the system is using them. I've never seen these files before. Are they ok to delete? Or should I leave them in my home folder? I always keep "Show hidden files" as well as "Show System files" checked, since I prefer being able to see all the files on my computer. If I shouldn't delete them, is there at least a way to tidy them up a bit? Thanks.

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• Need to make a scheduled task run as another user but keep the current user’s environment

  - by Chad Marmon

  I need to backup users .pst files. The current method I am trying is making a shadow copy using Diskshadow. My script works great all but Diskshadow needs to be ran as administrator but also needs to retain the logged-on user's environment variables; specifically, the %USERNAME% and %HOMESHARE% variables so the right user’s files get copied up to the right network location. I have for the most part got this to work), but there’s no straightforward (or secure, at least) way to pass the password. If I set up a scheduled task to run the script as a domain user with local admin privs, the environment variables get lost. I need to run this script automagically so that there should be no user interaction. If I could figure out how to make a scheduled task run as another user but keep the current user’s environment, I think this would work, but I’ve been beating my head against that for a while now, without any luck.

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• Home CAT6 wiring: CMR vs CMP?

  - by Eddie Parker

  I'm planning on wiring my house with CAT6 cable. I'm finding a large jump in price between CMR and CMP cabling, and I'm confused by what counts as a 'plenum' and what does not. As I'm wiring my house, I'm planning on going through interior (hollow) walls, and through the attic and crawlspace to get to the points I wish to wire. I will be going between floors at one point, which leads me to believe I need at least CMR, and obviously CMP wouldn't hurt either. I don't mind spending the extra money if I need to, but is it overkill going for CMP if the bulk of the wires are either going vertical, or through a crawlspace or attic?

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• Apache error_log showing which command output

  - by Unai Rodriguez

  Apache's error_log shows lines like the following: --- snip --- which: no ruby in (/sbin:/usr/sbin:/bin:/usr/bin) which: no locate in (/sbin:/usr/sbin:/bin:/usr/bin) which: no suidperl in (/sbin:/usr/sbin:/bin:/usr/bin) which: no get in (/sbin:/usr/sbin:/bin:/usr/bin) which: no fetch in (/sbin:/usr/sbin:/bin:/usr/bin) which: no links in (/sbin:/usr/sbin:/bin:/usr/bin) which: no lynx in (/sbin:/usr/sbin:/bin:/usr/bin) which: no lwp-mirror in (/sbin:/usr/sbin:/bin:/usr/bin) which: no lwp-download in (/sbin:/usr/sbin:/bin:/usr/bin) which: no kav in (/sbin:/usr/sbin:/bin:/usr/bin) --- end --- The architecture is: Internet - Load Balancer - Varnish - Apache There are several web servers behind the load balancer and I have checked at least one of them with rkhunter (link) and couldn't find anything suspicious. Versions: CentOS 5.7 Varnish 2.1.5 Apache 2.2.3 PHP 5.2.17 Does this mean that someone has executed the command which through Apache? How can that happen? Thank you so much.

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• Nagios orphaned services warnings

  - by Gordon

  We have had Nagios running on one of our servers with out any problems for a while but lately certain old service warning have been reappearing and then disappearing on the service detail page. From looking at the logs I found warning like the following. Warning: The check of service 'Tomcat' on host 'virtual1' looks like it was orphaned (results never came back). I'm scheduling an immediate check of the service... Has anyone ever came across this before or at least know a way to delete the old Orphaned Warnings. The Nagios Version we are running is Version 3.0b7 so an update might be in order. Thanks.

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• Can't set-up Wifi Adhoc on my Raspberry Pi with an USB dongle

  - by Wouter

  I am trying to set-up an access point (ad-hoc) for my Raspberry Pi. That means I'm trying to "share" the ethernet connection over Wi-Fi. I am doing this using my Ralink Technology, Corp. RT2501/RT2573 Wireless Adapter. When following a tutorial (or actually every tutorial), it immediately goes wrong. root@pinkypi:/home/pi# iwconfig wlan0 mode ad-hoc Error for wireless request "Set Mode" (8B06) : SET failed on device wlan0 ; Device or resource busy. I already tried ifdown and not having it in the USB port at the startup. If it helps, every action with the thing fail (or at least setting the mode). I am using Debian. I'm sure I'm overseeing something, but I can't find out what. What is wrong?

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• Are there netcat-like tools for Windows which are not quarantined as malware?

  - by Matthew Murdoch

  I used to use netcat for Windows to help track down network connectivity issues. However these days my anti-virus software (Symantec - but I understand others display similar behaviour) quarantines netcat.exe as malware. Are there any alternative applications which provide at least the following functionality: can connect to an open TCP socket and send data to it which is typed on the console can open and listen on a TCP socket and print received data to the console ? I don't need the 'advanced' features (which are possibly the reason for the quarantining) such as port scanning or remote execution.

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