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• Editing a windows XP installation's registry without being able to log in.

  - by Alain

  I've got a windows XP installation that has a corrupt registry. A worm (which was removed) had hijacked the HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon entry (which should have a value of Userinit=C:\windows\system32\userinit.exe When the worm was removed, the corrupt entry was deleted entirely, and now the system automatically logs off immediately after attempting to log in. Regardless of the user and boot mode, no accounts can be logged in to. The only thing required to correct this behavior is to restore the registry key, but I cannot come up with any ways of editing the registry without logging in to an account. I tried remotely connecting to the registry but the required services aren't enabled on the machine. I tried booting on the same machine using the BartPE boot CD but I could not find any way of editing the registry on the C:\Windows installation - running regedit only modifies the X:\I386\ registry in memory. So, what can I use modify the registry of an un-login-able Windows XP instance so that I can log in again? Thanks guys. EDIT: The fix worked. The solution to the auto-logoff problem was, as hoped, to simply add the value mentioned above to the appropriate registry entry. This can be done using the BartPE Boot CD, as described in the accepted answer below, but I used the Offline NT Registry Editor software mentioned in another answer. The steps were: Boot from the NT Registry Editor CD Follow the directions until the appropriate boot sector is loaded. Instead of using one of the default options for modifying passwords or user accounts, type "software" to edit that hive. Type '9' to enter the command line based registry editor. Type "cd Microsoft" (enter) "cd Windows NT" (enter) "cd CurrentVersion" (enter) "cd Winlogon" (enter) Type "nv 1 Userinit" to create a new value under the Winlogon key Type "ev Userinit" to edit the new value, and when prompted, type "C:\windows\system32\userinit.exe" (enter) Type 'q' to quit the registry editor, and as you back out of the system, follow directions to write the hive back to disk. Restart your computer and log in - problem solved. (generic 'warning: back up your registry' disclaimer)

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• SQL Server 2008 login problem with ASP.NET application: Failed to open the explicitly specified data

  - by eulerfx

  I am running SQL Server 2008 Express Edition on Windows Server 2008 with an ASP.NET application which must access the server. The ASP.NET application is associated with an application pool that runs on the NetworkService account. This account in turn has a Login and User record on SQL Server in the required database. When I attempt to run the ASP.NET website I get a blank page and when viewed in the error log, I seem to be getting this information event record: Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. Reason: Failed to open the explicitly specified database. [CLIENT: myLocalMachine] The connection string has Trusted_Connection=True; and the required database specified. When I explicitly specify the user name and password I get another login error stating the password is incorrect, even though the same un/pw combination works through SQL Server Management studio. The NETWORK SERVICE account seems to have all the required privileges for the database. Also, I made a test ASP.NET website project which does a simple select from a table in that database, and using the same config file I am not getting the error and it seems to work. Is it something to do with trust levels then, because the original ASP.NET web app references various DLLs including open source libraries. Also, the application does not seem to be able to write to the event log itself, throwing a security exception, even though everything in the config files, including machine.config states the app is in full trust.

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• Will this increase my Virtual private Server failing rate ?

  - by Spencer Lim

  Will this increase my Virtual private Server failing rate if i :- install Microsoft Window Server 2008 Enterprise install SQL server enterprise 2008 install IIS 7.5 install ASP.Net Mvc 2 install Microsoft Exchange << should live inside MWS2008 ? or standalone without OS? install Team foundation server << should live inside MWS2008 ? or standalone without OS? on one mini VPS with specification of DELL Poweredge R710 shared plan DDR3 ECC RAMs 16GB and -- 1GB for this VPS using DELL PERC 6i raid controller (this thing alone about 1.5k-2k) and the SAS HDD (15K RPM) (146GB) -- 33GB to this VPS each hdd is freaking fast over 300MB read / write possible with proper tuning the motherboard is a DELL and it has twin redundant PSU (870watt 85%eff) its running on Intel Xeon 5502 (Quad Core) x2 so about 8 physical proc (fairly share) is there any ruler to measure for this about one VPS can only install what what what service ? because of my resource is limited =.@ may i know if it is install in this way,maybe it seem like defeat the way of "VPS"... what will happen ? or any guideline on this issue (fully configuring the window server 2008 R2) ? Thx for reply

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• 2 Server FC SAN Configuration

  - by BSte

  I have 2 identical servers: -48GB Ram -8GigE NIC's -2FC NIC's -2x72GB RAID1 Hard Drives -Server 2008R2 Host I also Have a Fibre Channel SAN: -16x146GB RAID10 Hard Drives -2xDual-port FC Controllers (Controller A and B both have ports 1 and 2) -Server 1 has Fiber to Ports A1 and B1 -Server 2 has Fiber to Ports A2 and B2 -I kept the default config with 1 Virtual Disk and 1 Volume -The default mappings show ports A1,A2,B1,B2 on LUN 0 with read-write My goal is: -2xVM's with IIS and Guest Level Failover -2xVM's with SQL 2008 Enterprise using a Single DB and Guest Level Failover -1xVM that is an application server, preferable with Host Failover. From what I read, this will also need AD for clustering to work. -I need at least 1 VM always running for IIS and the SQLDB. This includes hardware failover and application (ie: reboot a VM for Critical updates) I was told I could install the VM's and run them from the SAN, and this is what I've tried: Installed MPIO and HyperV on Server1 and Server 2 Added the SAN as Disk E: on both servers, made it GPT and formatted NTFS Configured HyperV on both server to store use E:\VD and E:\VHD On server1, I was able to install 3 VM's on the SAN and all worked well. On server2, I would start installing the other 2 VM's, but always at some point the VM's would get a corrupt .VHD message (either server). Everything I found about the message typically related to antivirus, so I removed all antivirus on both Host servers (now only running 2008R2). I reformatted drive E: (SAN), recreated the VHD and VD directories, installed 3 VM's on Server 1, and then had the same issue when installing VM's on Server2. Obviously something is wrong, but I'm not certain what exactly. My questions: 1) Are my goals possible with this hardware setup? -I've read 2008R2 supports FC SAN's, but a lot of articles seem to only give examples with iSCSCI setups 2) What would be the suggested route on setting up the SAN (disks,volumes,LUN's)? I've worked with HyperV on a single machine before and never had issues. Actual experience working on SAN's and clustering is new to me. Any suggestions or recommendations to get me in the right direction would be much appreciated.

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• Commandline program to extract archives with automatic subdirectry detection

  - by ??????

  The title already says it. What I'm looking for is essentially the pure commandline counterpart to ark -ba <path> (on KDE), or file-roller -h <path> (on GNOME/Unity). Unfortunately, both ark and file-roller require X to be running. I'm aware that it is relatively simple to write a tool that detects archives based on their file extension, and then runs the appropiate program: #!/bin/bash if [[ -f "$1" ]] ; then case $1 in *.tar.bz2) tar xjvf $1 ;; *.tar.gz) tar xzvf $1 ;; *.bz2) bunzip2 $1 ;; *.rar) rar x $1 ;; *.gz) gunzip $1 ;; *.tar) tar xf $1 ;; *.tbz2) tar xjvf $1 ;; *.tgz) tar xzvf $1 ;; *.zip) unzip $1 ;; *.Z) uncompress $1 ;; *.7z) 7z x $1 ;; *) echo "'$1' cannot be extracted with this utility" ;; esac else echo "path '$1' does not exist or is not a file" fi However, that doesn't take care of subdirectory detection (and in fact, many extraction programs do not even supply such an option). So might there be a program that does exactly that? I wasn't sure whether or not to ask on askubuntu.com, because this question isn't really about Ubuntu, but rather about any Linux operating system. My apologies if this question does not fit in here.

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• IIS rewrite rule to check for querystring and add it if its not there

  - by M.R.

  I'm trying to make a IIS URL rewrite rule that appends an URL parameter to the URL. The url parameter is hssc. So, any url that is processed through the server, needs that parameter. Keeping in mind that some urls will have their own params already, and other urls won't, and root urls, etc, sometimes it will need to add ?hssc=1 or &hssc= - so, if I have a URL that is as such: http://www.blah.com should become http://www.blah.com/?hssc=1 http://www.blah.com/index.html should become http://www.blah.com/index.html?hssc=1 http://www.blah.com/?q=5 should become http://www.blah.com/q=5&hssc=1 http://www.blah.com/index.html?q=5 should become http://www.blah.com/index.html?q=5&hssc=1 http://www.blah.com/index.html?q=5&hssc=1 should be left alone I also want it that the URL should not be hidden (as in a backend rewrite behind the scenes). I need the URL to appear in the URL, so when users copy the URL, or bookmark it, the parameter is there. I've set the condition to match it \&hssc|\?hssc - now I just need a way to write the URL, so it appears and keeps the part of the original URL that is already there.

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• Subversion 1.6 + SASL : Only works with plaintext 'userPassword'?

  - by SiegeX

  I'm attempting to setup svnserve with SASL support on my Slackware 13.1 server and after some trial and error I'm able to get it to work with the configuration listed below: svnserve.conf [general] anon-access = read auth-access = write realm = myrepo [sasl] use-sasl = true min-encryption = 128 max-encryption = 256 /etc/sasl2/svn.conf pwcheck_method: auxprop auxprop_plugin: sasldb sasldb_path: /etc/sasl2/my_sasldb mech_list: DIGEST-MD5 sasldb users $ sasldblistusers2 -f /etc/sasl2/my_sasldb test@myrepo: cmusaslsecretOTP test@myrepo: userPassword You'll notice that the output of sasldblistusers2 shows my test user as having both an encrypted cmusaslsecretOTP password as well as a plain text userPassword passwd. i.e., if I were to run strings /etc/sasl2/my_sasldb I would see the test users' password in plaintext. These two password entries were created with the following subversion book recommended command: saslpasswd2 -c -f /etc/sasl2/my_sasldb -u myrepo test After reading man saslpasswd2 I see the following option: -n Don't set the plaintext userPassword property for the user. Only mechanism-specific secrets will be set (e.g. OTP, SRP) This is exactly what I want to do, suppress the plain text password and only use the mechanism-specific secret (OTP in my case). So I clear out /etc/sasl2/my_sasldb and rerun saslpasswd2 as: saslpasswd2 -n -c -f /etc/sasl2/my_sasldb -u myrepo test I then follow it up with a sasldblistusers2 and I see: $ sasldblistusers2 -f /etc/sasl2/my_sasldb test@myrepo: cmusaslsecretOTP Perfect! I think, now I have only encrypted passwords.... only neither the Linux svn client nor the Windows TortoiseSVN client can connect to my repo anymore. They both present me with the user/pass challenge but that's as far as I get. TLDR So, what is the point of SVN supporting SASL if my sasldb must store its passwords in plaintext to work?

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• Pure-FTPD accounts and permissions for websites

  - by EddyR

  I'm having trouble setting up the appropriate Pure-FTPD accounts and permissions - I have the following sites setup up on my Debian server. /var/www/site1 /var/www/site2 /var/www/wordpress The permissions are 775 for folders and 664 for files. The owner is currently admin:ftpgroup Wordpress also requires special permissions for file uploads in /var/www/wordpress/wp-content/uploads What I need is: a general admin group with access to /var/www a group for each site (site1, site2, wordpress) and a group or user, not www-data (?), with permissions to write files to the wordpress upload folder I ask because restrictions on linux groups (can't have groups in groups) makes it a little bit confusing and also because many of the tutorial sites have conflicting information like, some recommend the use of www-data and some don't. Also, I'm not sure if I understand how Pure-FTP is supposed to work exactly. I create a Pure-FTPD account and assign it a directory (/var/www) and a system user (ftpuser) and group (ftpgroup): Can I assign more than 1 path? For example, if a user requires access to 2 sites. Is it better to assign ftpgroup to all ftp locations and let Pure-FTPD manage account access? Why would anyone have more than 1 ftpuser or ftpgroup? (Doesn't it mean users have access to everyone else's files if they could get there?) Sorry for so many questions at once. I've been reading lots of tutorials but I think they've ended up making me more confused!

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• Puppet: array in parameterized classes VS using resources

  - by Luke404

  I have some use cases where I want to define multiple similar resources that should end up in a single file (via a template). As an example I'm trying to write a puppet module that will let me manage the mapping between MAC addresses and network interface names (writing udev's persistent-net-rules file from puppet), but there are also many other similar usage cases. I searched around and found that it could be done with the new parameterised classes syntax: if implemented that way it should end up being used like this: node { "myserver.example.com": class { "network::iftab": interfaces => { "eth0" => { "mac" => "ab:cd:ef:98:76:54" } "eth1" => { "mac" => "98:76:de:ad:be:ef" } } } } Not too bad, I agree, but it would rapidly explode when you manage more complex stuff (think network configurations like in this module or any other multiple-complex-resources-in-a-single-config-file stuff). In a similar question on SF someone suggested using Pienaar's puppet-concat module but I doubt it could get any better than parameterised classes. What would be really cool and clean in the configuration definition would be something like the included host type, it's usage is simple, pretty and clean and naturally maps to multiple resources that will end up being configured in a single place. Transposed to my example it would be like: node { "myserver.example.com": interface { "eth0": "mac" => "ab:cd:ef:98:76:54", "foo" => "bar", "asd" => "lol", "eth1": "mac" => "98:76:de:ad:be:ef", "foo" => "rab", "asd" => "olo", } } ...that looks much better to my eyes, even with 3x options to each resource. Should I really be passing arrays to parameterised classes, or there is a better way to do this kind of stuff? Is there some accepted consensus in the puppet [users|developers] community? By the way, I'm referring to the latest stable release of the 2.7 branch and I am not interested in compatibility with older versions.

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• How can I automatically restart Apache and Varnish if can't fetch a file?

  - by Tyler

  I need to restart Apache and Varnish and email some logs when the script can't fetch robots.txt but I am getting an error ./healthcheck: 43 [[: not found My server is Ubuntu 12.04 64-bit #!/bin/sh # Check if can fetch robots.txt if not then restart Apache and Varnish # Send last few lines of logs with date via email PATH=/bin:/usr/bin THEDIR=/tmp/web-server-health [email protected] mkdir -p $THEDIR if ( wget --timeout=30 -q -P $THEDIR http://website.com/robots.txt ) then # we are up touch ~/.apache-was-up else # down! but if it was down already, don't keep spamming if [[ -f ~/.apache-was-up ]] then # write a nice e-mail echo -n "Web server down at " > $THEDIR/mail date >> $THEDIR/mail echo >> $THEDIR/mail echo "Apache Log:" >> $THEDIR/mail tail -n 30 /var/log/apache2/error.log >> $THEDIR/mail echo >> $THEDIR/mail echo "AUTH Log:" >> $THEDIR/mail tail -n 30 /var/log/auth.log >> $THEDIR/mail echo >> $THEDIR/mail # kick apache echo "Now kicking apache..." >> $THEDIR/mail /etc/init.d/varnish stop >> $THEDIR/mail 2>&1 killall -9 varnishd >> $THEDIR/mail 2>&1 /etc/init.d/varnish start >> $THEDIR/mail 2>&1 /etc/init.d/apache2 stop >> $THEDIR/mail 2>&1 killall -9 apache2 >> $THEDIR/mail 2>&1 /etc/init.d/apache2 start >> $THEDIR/mail 2>&1 # prepare the mail echo >> $THEDIR/mail echo "Good luck troubleshooting!" >> $THEDIR/mail # send the mail sendemail -o message-content-type=html -f [email protected] -t $EMAIL -u ALARM -m < $THEDIR/mail rm ~/.apache-was-up fi fi rm -rf $THEDIR

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• BitLocker with Windows DPAPI Encryption Key Management

  - by bigmac

  We have a need to enforce resting encryption on an iSCSI LUN that is accessible from within a Hyper-V virtual machine. We have implementing a working solution using BitLocker, using Windows Server 2012 on a Hyper-V Virtual Server which has iSCSI access to a LUN on our SAN. We were able to successfully do this by using the "floppy disk key storage" hack as defined in THIS POST. However, this method seems "hokey" to me. In my continued research, I found out that the Amazon Corporate IT team published a WHITEPAPER that outlined exactly what I was looking for in a more elegant solution, without the "floppy disk hack". On page 7 of this white paper, they state that they implemented Windows DPAPI Encryption Key Management to securely manage their BitLocker keys. This is exactly what I am looking to do, but they stated that they had to write a script to do this, yet they don't provide the script or even any pointers on how to create one. Does anyone have details on how to create a "script in conjunction with a service and a key-store file protected by the server’s machine account DPAPI key" (as they state in the whitepaper) to manage and auto-unlock BitLocker volumes? Any advice is appreciated.

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• Rebooting access point via SSH with pexpect... hangs. Any ideas?

  - by MiniQuark

  When I want to reboot my D-Link DWL-3200-AP access point from my bash shell, I connect to the AP using ssh and I just type reboot in the CLI interface. After about 30 seconds, the AP is rebooted: # ssh [email protected] [email protected]'s password: ******** Welcome to Wireless SSH Console!! ['help' or '?' to see commands] Wireless Driver Rev 4.0.0.167 D-Link Access Point wlan1 -> reboot Sound's great? Well unfortunately the ssh client process never exits, for some reason (maybe the AP kills the ssh server a bit too fast, I don't know). My ssh client process is completely blocked (even if I wait for several minutes, nothing happens). I always have to wait for the AP to reboot, then open another shell, find the ssh client process ID (using ps aux | grep ssh) then kill the ssh process using kill <pid>. That's quite annoying. So I decided to write a python script to reboot the AP. The script connects to the AP's CLI interface via ssh, using python-pexpect, and it tries to launch the "reboot" command. Here's what the script looks like: #!/usr/bin/python # usage: python reboot_ap.py {host} {user} {password} import pexpect import sys import time command = "ssh %(user)s@%(host)s"%{"user":sys.argv[2], "host":sys.argv[1]} session = pexpect.spawn(command, timeout=30) # start ssh process response = session.expect(r"password:") # wait for password prompt session.sendline(sys.argv[3]) # send password session.expect(" -> ") # wait for D-Link CLI prompt session.sendline("reboot") # send the reboot command time.sleep(60) # make sure the reboot has time to actually take place session.close(force=True) # kill the ssh process The script connects properly to the AP (I tried running some other commands than reboot, they work fine), it sends the reboot command, waits for one minute, then kills the ssh process. The problem is: this time, the AP never reboots! I have no idea why. Any solution, anyone?

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• MySQL tmpdir on /dev/shm with SELinux

  - by smorfnip

  On RHEL5, I have a small MySQL database that has to write temp files. To speed up this process, I would like to move the temporary directory to /dev/shm by putting the following line into my.cnf: tmpdir=/dev/shm/mysqltmp I can create /dev/shm/mysqltmp just fine and do chown mysql:mysql /dev/shm/mysqltmp chcon --reference /tmp/ /dev/shm/mysqltmp I've tried to make SELinux happy by applying the same settings that are in effect for /tmp/ (and /var/tmp/), which is presumably where MySQL is writing its tmp files if tmpdir is undefined. The problem is that SELinux complains about MySQL having access to that directory. I get the following in /var/log/messages: SELinux is preventing mysqld (mysqld_t) "getattr" to /dev/shm (tmpfs_t). SELinux is a hard mistress. Details: Source Context root:system_r:mysqld_t Target Context system_u:object_r:tmpfs_t Target Objects /dev/shm [ dir ] Source mysqld Source Path /usr/libexec/mysqld Port <Unknown> Host db.example.com Source RPM Packages mysql-server-5.0.77-3.el5 Target RPM Packages Policy RPM selinux-policy-2.4.6-255.el5_4.1 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name catchall_file Host Name db.example.com Platform Linux db.example.com 2.6.18-164.2.1.el5 #1 SMP Mon Sep 21 04:37:42 EDT 2009 x86_64 x86_64 Alert Count 46 First Seen Wed Nov 4 14:23:48 2009 Last Seen Thu Nov 5 09:46:00 2009 Local ID e746d880-18f6-43c1-b522-a8c0508a1775 ls -lZ /dev/shm shows drwxrwxr-x mysql mysql system_u:object_r:tmp_t mysqltmp and permissions for /dev/shm itself are drwxrwxrwt root root system_u:object_r:tmpfs_t shm I've also tried chcon -R -t mysqld_t /dev/shm/mysqltmp and setting the group on /dev/shm to mysql with no better results. Shouldn't it be enough to tell SELinux, hey, this is a temp directory just like MySQL was using before? Short of turning off SELinux, how do I make this work? Do I need to edit SELinux policy files?

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• HP Storageworks 448 tape drive input/output error with Ubuntu

  - by Dan D

  I'm trying to set a backup to tape of a machine using flexbackup. However any attempt to write to the tape drive (via either flexbackup or just tar) results in "/dev/st0: Input/output error" The machine seems to recognise the drive (HP Storageworks Ultrium 448) and that there's a tape in it and "mt status" seems to work... "mt -f /dev/st0 rewind" or "erase" throw no errors... root@stor001:/# mt status SCSI 2 tape drive: File number=0, block number=0, partition=0. Tape block size 0 bytes. Density code 0x42 (LTO-2). Soft error count since last status=0 General status bits on (41010000): BOT ONLINE IM_REP_EN root@stor001:/# cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: HL-DT-ST Model: DVDRAM GSA-4084N Rev: KS02 Type: CD-ROM ANSI SCSI revision: 05 Host: scsi2 Channel: 00 Id: 03 Lun: 00 Vendor: HP Model: Ultrium 2-SCSI Rev: S65D Type: Sequential-Access ANSI SCSI revision: 03 "tell" does however root@stor001:/# mt -f /dev/st0 tell /dev/st0: Input/output error Based on a forum post I found, I tried: root@stor001:/# dd if=/dev/zero of=/dev/nst0 bs=1024 count=10 10+0 records in 10+0 records out 10240 bytes (10 kB) copied, 5.0815 s, 2.0 kB/s which gave the person on the forum an error but seems to work for me. If anyone has any suggestions, I'm all ears...

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• Switch Text Paragraphs in OpenOfficeOrg Writer mailmerge

  - by Glen S. Dalton

  I am using mailmerge to write the same letter with minor differenes to many peolpe. I experienced that switching text paragraphs depending on database values was not easy for me. I ended up putting huge text paragraphs into the database becaus switching did not really work for me. Actually I dont' understand how writer does it and maybe the boolean evaluation is buggy? There is some possibility making paragraphs invisible depending on database fields, but it was frustrating. After marking a paragraph as invisible (depending on a condition) it went invisible in the main document and did not come back, I lost the content. An example in pseudocode of what I want in my mailmerge document: {if [[balance]] 10} We owe you money. Please can you send your bank details. {end if} {if [[balance]] < -10} Please transfer the remaining amount to our banc account 123... {end if} Maybe this could be done with makros? But how to combine makros with mailmerge? Can you tell me what are the pitfalls and how to master them? I once did this with ms word, it was a lot easier. The normal mailmerge (including database fields in the letters) works fine for me in OpenOffice writer.

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• Folder Redirection Issues - Freezing, Strange Warnings

  - by JCardenas

  I have Folder Redirection set up in a test environment for a couple accounts. I have followed the instructions for setting up the folder security settings here, and I can confirm that folders are created automatically by the system with the correct security settings when a user logs in. The GPO has been configured to automatically move user files up to the redirected folders, and this is working properly. Problems start occurring when a Windows 7 PC is in use. It is rare, but Explorer will lock up when performing a file write operation (move/copy/save from application). This results in the entire system being unusable, with only a hard reset resolving it (Task Manager doesn't start, the "three finger salute" does nothing, apps stop working). The mouse functions, but clicks do nothing. The other issue is that occasionally when copying/creating/modifying files a dialog box will pop up with the message "You need permission to perform this action. You require permission from XYZ\cardenas to make changes to this folder." The folder that was created by copying an existing one has the correct security settings and lists me as the owner. My company will not be implementing Folder Redirection on XP, since we are making a "clean break" with implementing new technologies with the Windows 7 rollout, so this behavior has not been - nor will be - checked for in XP. Thanks in advance for your help!

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• ZFS - Impact of L2ARC cache device failure (Nexenta)

  - by ewwhite

  I have an HP ProLiant DL380 G7 server running as a NexentaStor storage unit. The server has 36GB RAM, 2 LSI 9211-8i SAS controllers (no SAS expanders), 2 SAS system drives, 12 SAS data drives, a hot-spare disk, an Intel X25-M L2ARC cache and a DDRdrive PCI ZIL accelerator. This system serves NFS to multiple VMWare hosts. I also have about 90-100GB of deduplicated data on the array. I've had two incidents where performance tanked suddenly, leaving the VM guests and Nexenta SSH/Web consoles inaccessible and requiring a full reboot of the array to restore functionality. In both cases, it was the Intel X-25M L2ARC SSD that failed or was "offlined". NexentaStor failed to alert me on the cache failure, however the general ZFS FMA alert was visible on the (unresponsive) console screen. The zpool status output showed: pool: vol1 state: ONLINE scan: scrub repaired 0 in 0h57m with 0 errors on Sat May 21 05:57:27 2011 config: NAME STATE READ WRITE CKSUM vol1 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c8t5000C50031B94409d0 ONLINE 0 0 0 c9t5000C50031BBFE25d0 ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 c10t5000C50031D158FDd0 ONLINE 0 0 0 c11t5000C5002C823045d0 ONLINE 0 0 0 mirror-2 ONLINE 0 0 0 c12t5000C50031D91AD1d0 ONLINE 0 0 0 c2t5000C50031D911B9d0 ONLINE 0 0 0 mirror-3 ONLINE 0 0 0 c13t5000C50031BC293Dd0 ONLINE 0 0 0 c14t5000C50031BD208Dd0 ONLINE 0 0 0 mirror-4 ONLINE 0 0 0 c15t5000C50031BBF6F5d0 ONLINE 0 0 0 c16t5000C50031D8CFADd0 ONLINE 0 0 0 mirror-5 ONLINE 0 0 0 c17t5000C50031BC0E01d0 ONLINE 0 0 0 c18t5000C5002C7CCE41d0 ONLINE 0 0 0 logs c19t0d0 ONLINE 0 0 0 cache c6t5001517959467B45d0 FAULTED 2 542 0 too many errors spares c7t5000C50031CB43D9d0 AVAIL errors: No known data errors This did not trigger any alerts from within Nexenta. I was under the impression that an L2ARC failure would not impact the system. But in this case, it surely was the culprit. I've never seen any recommendations to RAID L2ARC. Removing the bad SSD entirely from the server got me back running, but I'm concerned about the impact of the device failure (and maybe the lack of notification from NexentaStor as well). Edit - What's the current best-choice SSD for L2ARC cache applications these days?

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• Windows Scheduled Startup Task doesn't appear to be fully working but why?

  - by Devtron

  I originally tried to use Group Policy to enforce a startup script to run at startup. My startup script is a .CMD file, which calls 10 .exe files. Using Group Policy I could never get this to work....so I looked into using Scheduled Tasks. And here I am. I have tried two different versions of my script (for syntax purposes). I originally thought my syntax could be bad, so I tried a few approaches. Neither work. My #1 .CMD file approach commands look similar to this: start "this is my title" /D "C:\Somepathhere\myExecutable.exe" "..\..\published\wc_task.wfc" My #2 .CMD file approach commands look similar to this (it invokes a shortcut file): rundll32 shell32.dll,ShellExec_RunDLL "C:\Somepathhere\bin\Virtual Workflow.lnk" ^ Both of these scripts work fine if I manually run them, either by running the .CMD file, or even by manually forcing the Schedule Task MSC console to "Run" this script. Manual process seems to work fine, but automated it does not. My scheduled task is set for startup and uses "highest privileges" to execute as Admin. At the end of my .CMD script, I added a line to write to a text file, just to prove that the script was being run. That command looks like this: echo foo > C:\foo.txt When I reboot my server, and Schedule Tasks kicks in, I never get my ten .EXE files to run, but I do get the C:\foo.txt on my drive. What gives?

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• o3d javascript uncaught referenceerror

  - by David

  hey, im new to javascript and am intersted in creating a small o3d script: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Test Game Website</title> </head> <body> <script type="text/javascript" src="o3djs/base.js"></script> <script type = "text/javascript" id="myscript"> o3djs.require('o3djs.camera'); window.onload = init; function init(){ document.write("jkjewfjnwle"); } </script> <div align="background"> <div id="game_container" style="margin: 0px auto; clear: both; background-image: url('./tmp.png'); width: 800px; height:600px; padding: 0px; background-repeat: no-repeat; padding-top: 1px;"></div> </div> </body> </html> the browser cant seem to find o3djs/base.js in this line <script type="text/javascript" src="o3djs/base.js"></script> and gives me an uncaught referenceerror at this line o3djs.require('o3djs.camera'); Obviously, because it can't find the o3djs/base.js... I have installed the o3d pluggin from google and they say that should be IT ive tried on firefox, ie and chrome thanks

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• iSCSI, failover and XenServer

  - by jemmille

  I have an iSCSI fail over implementation setup so if one of my storage units fails the other takes over immediately (it also runs the NFS shares). When fail over occurs, volumes are exported, the IP is switched to the other machine and the targets are reconfigured. The fail over of the storage system itself works just fine. I use NexentaStor for my filer. When I do a test (manual) fail over of my storage the following occurs: Note: I run the admin VM's on NFS and customer based VM's on iSCSI All NFS based VM's remain up and working perfectly through the failover and after All VM 's running on iSCSI eventually report the following: An error about not being able to write to a particular block An error about journaling not working Then the file system goes RO To get the VM's working again I have to do the following: Force shutdown of the "broken" VM's. Detach the iSCSI SR Re-attach the iSCSI SR Boot the VM on a different server (5 in my pool) If I don't boot on a different server I get this error "Internal error: Failure("The VDI <uuid&gt; is already attached in RW mode; it can't be attached in RO mode!")" The only way I have found to fix that error is to reboot the entire server it was running on previously which is obviously a huge pain. Currently multipathing is NOT enabled (but can be and the same thing still occurs). I have edited much of the /etc/iscsid.conf file to work with the timeout settings but to no avail. In short, my storage fails over properly but XenServer does not keep the connection alive. As a thought, the error that shows up in #4 above might be the ultimate cause and fixing that would fix everything? Any help would be appreciated more than you know.

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• Force database read to master if slave data is stale

  - by Jeff Storey

  I previously asked a specific question about this database replication for new user signup to which I got an answer, but I want to ask this in the more general sense. I have a database setup in which I am using a master/slave combination. I am using the slaves for load balancing (the data itself is partitioned/sharded across multiple databases, but each database has X slaves for load balancing). Let's say I write some data to the master. Now I do a subsequent read which hits a slave, but the slave has not yet caught up to the master. Is there a way (which can be done quickly since it will happen frequently) to determine if the data is stale in the slave so I can then route to the master? In my previous question, it was suggested to do simultaneous writes to the cache and the database. This solution seems practical, but there is still a chance that the data may have been removed from the cache but not yet updated in the slave. A possible solution is to ensure the cache is big enough (based on the typical application load) so the data will not be evicted within the time frame it takes to replicate the data. This seems like it may be feasible. Can anyone provide additional insight into this question? Thanks!

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• Convert HTACCESS mod_rewrite directives to nginx format?

  - by Chris

  I'm brand new to nginx and I am trying to convert the app I wrote over from Apache as I need the ability to serve a lot of clients at once without a lot of overhead! I'm getting the hang of setting up nginx and FastCGI PHP but I can't wrap my head around nginx's rewrite format just yet. I know you have to write some simple script that goes in the server {} block in the nginx config but I'm not yet familiar with the syntax. Could anyone with experience with both Apache and nginx help me convert this to nginx format? Thanks! # ------------------------------------------------------ # # Rewrite from canonical domain (remove www.) # # ------------------------------------------------------ # RewriteCond %{HTTP_HOST} ^www.domain.com RewriteRule (.*) http://domain.com/$1 [R=301,L] # ------------------------------------------------------ # # This redirects index.php to / # # ------------------------------------------------------ # RewriteCond %{THE_REQUEST} ^[A-Z]+\ /(index|index\.php)\ HTTP/ RewriteRule ^(index|index\.php)$ http://domain.com/ [R=301,L] # ------------------------------------------------------ # # This rewrites 'directories' to their PHP files, # # fixes trailing-slash issues, and redirects .php # # to 'directory' to avoid duplicate content. # # ------------------------------------------------------ # RewriteCond %{DOCUMENT_ROOT}/$1.php -f RewriteRule ^(.*)$ $1.php [L] RewriteCond %{DOCUMENT_ROOT}/$1.php -f RewriteRule ^(.*)/$ http://domain.com/$1 [R=301,L] RewriteCond %{THE_REQUEST} ^[A-Z]+\ /[^.]+\.php\ HTTP/ RewriteCond %{DOCUMENT_ROOT}/$1.php -f RewriteRule ^([^.]+)\.php$ http://domain.com/$1 [R=301,L] # ------------------------------------------------------ # # If it wasn't redirected previously and is not # # a file on the server, rewrite to image generation # # ------------------------------------------------------ # RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^([a-z0-9_\-@#\ "'\+]+)/?([a-z0-9_\-]+)?(\.png|/)?$ generation/image.php?user=${escapemap:$1}&template=${escapemap:$2} [NC,L]

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• syslog-ng and nging logs to mysql

  - by Katafalkas

  So couple of days ago I asked how to log php and nginx logs to centralized MySQL database, and m0ntassar gave a perfect answer :) cheer ! The problem I am facing now is that I can not seem to get it working. syslog-ng version: # syslog-ng --version syslog-ng 3.2.5 This is my nginx log format: log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; syslog-ng source: source nginx { file( "/var/log/nginx/tg-test-3.access.log" follow_freq(1) flags(no-parse) ); }; syslog-ng destination: destination d_sql { sql(type(mysql) host("127.0.0.1") username("syslog") password("superpasswd") database("syslog") table("nginx") columns("remote_addr","remote_user","time_local","request","status","body_bytes_sent","http_ referer","http_user_agent","http_x_forwarded_for") values("$REMOTE_ADDR", "$REMOTE_USER", "$TIME_LOCAL", "$REQUEST", "$STATUS","$BODY_BYTES_SENT", "$HTTP_REFERER", "$HTTP_USER_AGENT", "$HTTP_X_FORWARDED_FOR")); }; MySQL table for testing purposes: CREATE TABLE `nginx` ( `remote_addr` varchar(100) DEFAULT NULL, `remote_user` varchar(100) DEFAULT NULL, `time` varchar(100) DEFAULT NULL, `request` varchar(100) DEFAULT NULL, `status` varchar(100) DEFAULT NULL, `body_bytes_sent` varchar(100) DEFAULT NULL, `http_referer` varchar(100) DEFAULT NULL, `http_user_agent` varchar(100) DEFAULT NULL, `http_x_forwarded_for` varchar(100) DEFAULT NULL, `time_local` text, `datetime` text, `host` text, `program` text, `pid` text, `message` text ) ENGINE=InnoDB DEFAULT CHARSET=latin1 Now first thing that goes wrong is when I restart syslog-ng: # /etc/init.d/syslog-ng restart Stopping syslog-ng: [ OK ] Starting syslog-ng: WARNING: You are using the default values for columns(), indexes() or values(), please specify these explicitly as the default will be dropped in the future; [ OK ] I have tried creating a file destination and it all works fine, and then I have tried replacing my destination with: destination d_sql { sql(type(mysql) host("127.0.0.1") username("syslog") password("kosmodromas") database("syslog") table("nginx") columns("datetime", "host", "program", "pid", "message") values("$R_DATE", "$HOST", "$PROGRAM", "$PID", "$MSGONLY") indexes("datetime", "host", "program", "pid", "message")); }; Which did work and it was writing stuff to mysql, The problem is that I want to write stuff to in exact format as nginx log format is. I assume that I am missing something really simple or I need to do some parsing between source and destination. Any help will be much appreciated :)

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• Mystery undeletable file

  - by Hugh Allen

  I can't delete C:\Config.Msi\75ce84f.rbf. it's not readonly, system or hidden it's not in use by another process (according to Process Explorer) the NT security permissions aren't the problem either - I am the owner and have Full Control ; as a double-check, the Effective Permissions tab shows that I have permission to delete. Yet trying to delete the file gives "Access is Denied" from both Explorer and cmd. I can however rename it or move it to another folder on the same drive. I can also read it and Virustotal says it's clean which is what I would expect (it's just a Windows Installer temp file - a copy of some DLL I think). The relevant line from Process Monitor is: 6:52:14.3726983 PM 112 Explorer.EXE SetDispositionInformationFile C:\Config.Msi\75ce84f.rbf CANNOT DELETE Delete: True Write 1232 Background: I'm using XP SP2. I recently repaired my Adobe Reader installation to make it the default browser plugin again instead of Foxit. (there seems to be no UI to do it otherwise?) So the installer did its thing and then asked to reboot. As is my habit when rebooting is inconvenient I declined the offer and ran pendmoves to find out what files the installer had scheduled to move / delete. It wanted to delete two files with .rbf extension (rollback files) located in C:\Config.msi\. (this applies to both even though I've been speaking about one). So I tried to delete them manually and couldn't. Does anyone have any ideas what could be preventing deletion? (and I don't think it's malware even though I'm not running AV at the moment)

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• What do I need in order to extract and combine text files from multiple ZIP files, via command line?

  - by Iszi

  I've got an interesting scripting challenge in front of me. I'm fairly certain there's a way to do it, but I feel like I'm probably lacking some particular tools and/or functional knowledge. There's some fifty-plus ZIP files that each contain, among other things, text files that need to be merged with one another. The structure is something like this: C:\Reports\FirstJob-1.zip |-MyName |-FirstJob |-1 |-[Some other folders] |-TXTReports |-English |-[Some other files] |-Report.txt C:\Reports\FirstJob-2.zip |-MyName |-FirstJob |-1 |-[Some other folders] |-TXTReports |-English |-[Some other files] |-Report.txt C:\Reports\SecondJob-1.zip |-MyName |-SecondJob |-1 |-[Some other folders] |-TXTReports |-English |-[Some other files] |-Report.txt If I had all the Report.txt files in one regular folder, and uniquely named, I could probably just write a FOR statement that targets *.txt and runs something like type filename.txt >> Consolidated.txt on each. However, these all have the same file name and are embedded deep within separate ZIP files. The potentially useful tools I currently have at my disposal are Windows XP Professional SP3, PowerShell, and WinZip. I'd rather not download or install anything else, but I do understand that third-party tools (or additional tools from Microsoft or WinZip) may be necessary. Whatever tools I use should run natively in Windows. I really don't want to have to mess with Cygwin or other emulators on this system. At the very least, I need a tool that will allow me to analyze and manipulate ZIP files from the command line. Also, are there any other particular complications to this that I've not yet thought of?

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