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• GlusterFS on VMWare ESXi 5

  - by Dharmavir

  I want to build network file system on top of my VMWare ESXi based virtual nodes which are running Ubuntu 12.04 LTS. I am evalaluating options and found that GlusterFS (http://www.gluster.org/) can turn out to be a good choice. Purpose: I have about 2 dozen VM nodes with different configurations, on 2 physical nodes which has following configuration: 16 core Intel Xeon 1 TB 48 GB RAM Now as I said earlier each Physical server has about 1TB hdd and I can increase if I want additional so for now I have 2TB disk space available, these space is distributed in VM nodes I have created on which about 2 dozen VM nodes live. Now some of them being application server and mgmt server, they have plenty of free disk space which I want to utilize for some heavy storage which I can not design if I do that individually on single VM node. This way if my storage is distributed between dozens of VM nodes and about 2 or more physical nodes I have some sort of backup as well. I do not mind if data gets stored redundently but per my knowledge it might hapeen that individual VM nodes will not be able to store all of the data because complete data size for example if we take 100GB will exceed VM disk size of 70GB and then VM will also have system and program files on it. I need some suggestion that will GlusterFS be the solution for which I am looking forward to or I should go with something like hadoop? I am not too sure. But yes, I would like to utilize my free space on each VM node and while doing that if I get store data redundently I am okay because it will give me data security.

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• How to check DVD region settings in Window 7

  - by jmatthias

  I have installed Windows 7 on my laptop. When I put a movie in the DVD drive, the video player starts up and tells me 'THIS DISC IS NOT FORMATTED TO PLAY IN THIS REGION'. I have changed the DVD region a few times in the past but while I was in Windows XP I changed the region in Region 1. I cannot find how to check the DVD region setting in Windows 7 (it's not located on the hard properties page of the DVD anymore. Does anybody know how to check the DVD region in Windows 7? Update: If I connect an external USB DVD drive I can see the DVD region tab on the hardware properties dialog. I guess there is some compatibility problem with my internal DVD drive and Windows 7 (as I said I was able to inspect/change the DVD region in Windows XP). Solution: I think I had used LtnRPC in the past to remove the region from my DVD drive. It looks like Windows 7 does not like region free DVD drives (at least mine anyway). I was able to use LtnRPC to reset the region back to 1. I can now see the region tab on the DVD drives hardware properties.

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• vagrant and puppet security for ssl certificates

  - by Sirex

  I'm pretty new to vagrant, would someone who knows more about it (and puppet) be able to explain how vagrant deals with the ssl certs needed when making vagrant testing machines that are processing the same node definition as the real production machines ? I run puppet in master / client mode, and I wish to spin up a vagrant version of my puppet production nodes, primarily to test new puppet code against. If my production machine is, say, sql.domain.com I spin up a vagrant machine of, say, sql.vagrant.domain.com. In the vagrant file I then use the puppet_server provisioner, and give a puppet.puppet_node entry of “sql.domain.com” to it gets the same puppet node definition. On the puppet server I use a regex of something like /*.sql.domain.com/ on that node entry so that both the vagrant machine and the real one get that node entry on the puppet server. Finally, I enable auto-signing for *.vagrant.domain.com in puppet's autosign.conf, so the vagrant machine gets signed. So far, so good... However: If one machine on my network gets rooted, say, unimportant.domain.com, what's to stop the attacker changing the hostname on that machine to sql.vagrant.domain.com, deleting the old puppet ssl cert off of it and then re-run puppet with a given node name of sql.domain.com ? The new ssl cert would be autosigned by puppet, match the node name regex, and then this hacked node would get all the juicy information intended for the sql machine ?! One solution I can think of is to avoid autosigning, and put the known puppet ssl cert for the real production machine into the vagrant shared directory, and then have a vagrant ssh job move it into place. The downside of this is I end up with all my ssl certs for each production machine sitting in one git repo (my vagrant repo) and thereby on each developer's machine – which may or may not be an issue, but it dosen't sound like the right way of doing this. tl;dr: How do other people deal with vagrant & puppet ssl certificates for development or testing clones of production machines ?

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• Apache 403 Forbidden Error when accessing local web server using local IP address

  - by amjo324

  I have an odd problem when attempting to browse to pages stored on a local web server (Apache 2.2). The pages are served as expected when I browse to localhost or 127.0.0.1 on port 80. Yet when I attempt to browse to the same pages by referencing the local IP address (192.168.x.x), I receive a HTTP 403 (Forbidden) error. In essence, http://localhost:80 works but 192.168.x.x:80 doesn't even though I'm specifying the IP of the local machine. You may be thinking "who cares? just use localhost". However, this is the first step in troubleshooting why I cannot remotely access these pages from different hosts on my LAN. I'm presuming this can't be a firewall issue as I'm only connecting to the local machine. Even so, I verified there was no iptables rules that could be having an effect. I've checked the Apache error logs and the corresponding line of relevance is: [Sat Oct 19 07:38:35 2013] [error] [client 192.168.x.x] client denied by server configuration: /var/www/ I've inspected most of the apache config files and they don't appear to differ from what you would expect with a default install. I can't see anything in apache2.conf that would be a problem and httpd.conf is an empty file. This is an excerpt from /etc/apache2/sites-enabled/000-default: <VirtualHost *:80> ServerAdmin webmaster@localhost DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> Any insight as to where I can look next to find a solution ? Thanks in advance.

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• NAT cause huge External (actually internal) bandwidth usage

  - by user67953

  We have 4 servers running in a data center, with internal IP: 192.168.3.* assigned. A hardware (FORTIGATE) firewall configured NAT, and it will lead the traffic as: external IP: 111.222.333.10 -> 192.168.3.10 www.server1.com 111.222.333.11 -> 192.168.3.11 www.server2.com 111.222.333.12 -> 192.168.3.12 www.server3.com In DNS, we have www.server1.com A 111.222.333.10 Now if I send a lot of data to www.server1.com from www.server2.com, the data will be send through 111.222.333.10 (external IP) and this cause our bandwidth usage huge (expensive!). The work around I have is to add a local host mapping to server2: 192.168.3.10 www.server1.com. That way when send files from server2 to www.server1.com, it will be internal. However, we are having more and more servers, it would be hard to manually add mapping to every server. Just wondering do we have another solution for this? Can we do something in the FORTIGATE firewall? ps. The DNS server being used is public, such as opendns, Google dns etc.

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• How do I increase maximum attachment size in Exchange 2007 SP1?

  - by AspNyc

  I've been looking all over for a relatively simple answer to a fairly straightforward question: "how do I increase the maximum size of attachments that can be sent and/or received in Exchange 2007?". But I have yet to find a solution that works. We have a pretty straightforward setup: Exchange 2007 SP1 running on a single server, with the OWA role delegated to a second server. We did a clean install of Exchange 2007 a year or two ago: we did not upgrade from a previous version. I forget if we installed RTM and then patched it to SP1, or if we installed with SP1 already baked in. I just thought I'd mention those items, in case they influence the answer. So far, I've tried running the following Powershell commands on the main Exchange server and verified that they've taken effect: Set-TransportConfig -MaxReceiveSize 40MB Set-ReceiveConnector "RcvConnector" -MaxMessageSize 40MB Set-MaxReceiveSize "MailboxName" -MaxReceiveSize 40MB As of right now, though, the specified mailbox is still rejecting messages over 10MB. You get brownie points if you can also tell me how to set the default mailbox attachment size limits, so that new accounts don't have default Set-MaxReceiveSize values of "unlimited" they currently do. Any advice or suggestions would be greatly appreciated. Tx in advance!

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• HaProxy - Http and SSL pass through config

  - by Bill

  I've currently got an HaProxy LB solution in place and everything is working fine however we are having an issue with a very few clients who cannot get to our site via HTTPS (SSL) they can browse our site in Http but as soon as they click on an absolute HTTPS link they are taken to our home page instead. Wondering if anyone can look at our config below and see if there's something awry. I believe we are on HaProxy 1.2.17 global log 127.0.0.1 local0 log 127.0.0.1 local1 notice #log loghost local0 info maxconn 6144 #debug #quiet user haproxy group haproxy defaults log global mode http option httplog option dontlognull retries 3 redispatch maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 stats auth # admin password stats uri /monitor listen webfarm # bind :80,:443 bind :443 mode tcp balance source #cookie SERVERID insert indirect #option httpclose #option forwardfor #option httpchk HEAD /check.cfm HTTP/1.0 server webA 111.10.10.1 #server webB 111.10.10.2 server webB 111.10.10.3 server webC 111.10.10.4 listen webfarmhttp :80 mode http balance source # option httpclose option forwardfor # option httpchk HEAD /check.cfm HTTP/1.0 option httpchk /check.cfm server webA 111.10.10.1 #server webB 111.10.10.2 server webB 111.10.10.3 server webC 111.10.10.4 listen monitor :8443 mode http balance roundrobin #cookie SERVERID insert indirect option httpclose option forwardfor #option httpchk HEAD /check.txt HTTP/1.0 #option httpchk HEAD /check.cfm HTTP/1.0 server webA 111.10.10.1 server webB 111.10.10.2

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• Symantec Protection Suite Enterprise Edition

  - by rihatum

  We (our company) are planning to deploy Symantec Endpoint Protection and Symantec Desktop Recovery 2011 Desktop Edition to our 3000 - 4000 workstations (Windows7 32 and 64) with a few 100s with Windows XP 32/64 Bit. I have read the implementation guide for SEP and have read tech-notes for Desktop Recovery 2011. Our team have planned to deploy this as follows : 1 x dedicated SQL 2008R2 for Symantec Endpoint Protection (Instead of using the Embedded Database) 1 x Dedicated SQL 2008R2 for Symantec Desktop Recovery 2011 (Instead of using the Embedded Database) 1 x Dedicated W2K8 R2 Box for the SEPM (Symantec Endpoint Protection Manager - Mgmt. APP) 1 x Dedicated W2K8 R2 Box for the Symantec Desktop Recovery 2011 Management Application Agent Deployment : As per Symantec Documentation for both of the above, an agent can be pushed via the Mgmt. Application (provided no firewalls are blocking ports required etc. - we have Windows firewall disabled already). Above is the initial plan we have for 3000 - 4000 client workstation (Windows) Now my Questions :-) a) If we had these users distributed amongst two sites with AD DC / GC in each site, How would I restrict SEPM and Desktop Mgmt. solution to only check for users in their respective site ? b) At present all users are under one building but we are going to move some dept. to a new location (with dedicated connectivity), How would we control which SEPM / MGMT Server is responsible for which site ? c) What Hardware would you recommend as a Server spec for the SQL server 16GB RAM, Dual XEON? d) What Hardware would you recommend as a Server spec for the MGMT Servers 16GB RAM each with DUAL xeon and sas disks? e) Also, how do you or would you recommend to protect these 4 servers (2 x SQL and 2 x MGMT Servers)? f) How would you recommend to store backups for these desktops? We do have a SAN and a NAS in our environment and we do have one spare DAS (Dell MD3000). If you have anything to add / correct - that will be really helpful before diving into the actual implementation phase. Will be most grateful with your suggestions, recommendations and corrections with above - Many Thanks ! Rihatum

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• How can I restore my original IME Romaji input settings?

  - by JOhn K

  the this one, Japanese IME on Windows: switch back to romaji input method (3) did not help. The problem seems the same. My Vista home premium version PC, I had been using Microsoft IME to use English and Japanese input using romaji henkan for a long time. One day, all of a sudden, first when I started up the PC, it has cap lock indicator ON. So, I press SHIFT key, CAP lock indicator is off!(This I have to do every morning.) Now when I want to type romaji input to change to Japanese, I switch EN English (United States) to "JP Japanese (Japan) and select input to hiragana input. It worked until that day. But now when I set to input romaji for hiragana as I used to do and start typing, then it shows Japanese hiragana directly on the display just as keyboard setting as Japanese ???109???????? as shown in Wikipedia JIS keyboard. And I cannot show hiragana as I wanted ( I can convert to Kanji OK) etc. by hitting space key. But its key board arrangement is what I never learned. Other thing I found is when I hit "`" key, it switches between hiragana and alphabet. When I see Control panel setting it is the same setting as I have seen. Please suggest me a solution to get the original setting for IME input mode as I used to do. John K.

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• Dynamic virtual host configuration in Apache

  - by Kostas Andrianopoulos

  I want to make a virtual host in Apache with dynamic configuration for my websites. For example something like this would be perfect. <VirtualHost *:80> AssignUserId $domain webspaces ServerName $subdomain.$domain.$tld ServerAdmin admin@$domain.$tld DocumentRoot "/home/webspaces/$domain.$tld/subdomains/$subdomain" <Directory "/home/webspaces/$domain.$tld/subdomains/$subdomain"> .... </Directory> php_admin_value open_basedir "/tmp/:/usr/share/pear/:/home/webspaces/$domain.$tld/subdomains/$subdomain" </VirtualHost> $subdomain, $domain, $tld would be extracted from the HTTP_HOST variable using regex at request time. No more loads of configuration, no more apache reloading every x minutes, no more stupid logic. Notice that I use mpm-itk (AssignUserId directive) so each virtual host runs as a different user. I do not intend to change this part. Since now I have tried: - mod_vhost_alias but this allows dynamic configuration of only the document root. - mod_macro but this still requires the arguments of the vhost to be declared explicitly for each vhost. - I have read about mod_vhs and other modules which store configuration in a SQL or LDAP server which is not acceptable as there is no need for configuration! Those 3 necessary arguments can be generated at runtime. - I have seen some Perl suggestions like this, but as the author states $s->add_config would add a directive after every request, thus leading to a memory leak, and $r->add_config seems not to be a feasible solution.

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• PS/2 to USB adapter doesn't work with Model M keyboard

  - by mickburkejnr

  I bought a server about 3 months ago from a friend, and I have only had time to tinker with it in the last week. I noticed that this server doesn't have any PS/2 ports, which meant configuring it was near impossible. I don't have any USB keyboards in the house, I only have an IBM Model M keyboard (built 1994) and another IBM keyboard that was built circa 2001. Both of them have PS/2 connections. I bought an adapter off eBay, and when I used it with the Model M keyboard the three lights on the keyboard flashed for a split second, but then the keyboard is then unresponsive. I can bash away at the keys for ages and nothing will happen. The same applies to the later built IBM keyboard. What could I do to make the adapter work? I am getting the loan of a USB keyboard in two weeks time, but I'd like a more permanent solution without having to rely on getting the loan of a keyboard every time I have to perform maintenance on the server. And as I already have two keyboards which work fine and I like using, I don't really want to have to buy another keyboard just for use on the server.

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• Error when attempting to do a differential or incremental backup of Exchange using ntbackup

  - by voon

  Hi folks, We're running Small Business Server 2003 here. I was reviewing our backup procedures lately and noticed in the ntbackup logs that the differential backups of Exchange were failing with the error: (SERVERNAME)\Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access. A quick search of google found this MS KB article: http://support.microsoft.com/kb/555613 However, both of the suggested fixes don't to apply to our problem. First solution is to make sure the backup media is formatted and has adequate space. Well, our backup target is a 1 TB external hard drive with about 600 gigs of free space. (A full backup of our Exchange DB is currently around 5 GB) The second suggested fix is to "perform a full backup before trying to do incremental". And again, that can't it because we are doing full backups twice a week. There are no errors in the application log, just entries for ntbackup starting and ending. I've also tested doing an differential & incremental backup onto the server's internal drive, which unsurprising still did not work. I could get around this problem by always doing a full backup of Exchange but I kind of like the idea of being space efficient with doing differential backups. Anyone got any ideas?

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• Why does ATI 5570 HD video card driver installation cause Windows 7 To Blue Screen?

  - by Mort

  This one is for the hive mind. I have a brand new Dell Optiplex 760 workstation with 4 gigabytes of RAM running Windows 7 Professional (32bit). This is a new box with nothing installed other than what was provided for directly by Dell. I installed a Saphire ATI PCI Express 5570 HD. Upon trying to install the 10.4 Catalyst drivers the system will blue screen. It blue screens during the hardware detection phase of the installation process. I have already performed the following trouble shooting steps: Changed system RAM Installed only 2 gigabytes of RAM Installed different versions of Catalyst drivers (10.4 - 9.12) Tried to install video only component of driver (vs entire Catalyst suite) Made sure Windows 7 was fully updated Flashed mother board BIOS to current version Removed and re-seated video card Contacted ATI Support (We all know how this went......) Verified supply outputting properly The blue screen error (via Windows BugCheck entry in event log) is a 0x000000CA and refers to a plug and play error most likely caused by a bad driver. The problem is that the driver installation process never gets far enough to actually install a driver. The resolution center in Windows provides a solution of installing the 10.4 Catalyst driver to resolve issue (which fails). Looking for some alternate views to resolve.

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• Prolific USB-to-Serial Comm Port significantly slower under Windows 7 comparing to Windows XP

  - by Dmitry S

  Not sure if this question should be asked here or on SuperUser but if we get an answer here it may be useful for others here I am using a Prolific USB-to-Serial adapter based on the Prolific chip to use with a device on serial port. I have the latest version of the driver installed: 1.3.0 (2010-7-15). When I use my device with this adapter on my main Windows 7 (32bit) system it takes 8-9 seconds to send a command through to the device. However, when I do the same thing on a different Windows XP system (an old laptop I borrowed for testing) it only takes 2-3 seconds. I have made sure that the port settings and other variables are the same between systems. I also tested on a third laptop (also running Windows 7) and again got a significant delay. So the question is if anyone else experienced the same problem and found a solution. I would like to avoid moving to an XP system for what I need to achieve so that's my last option. Thanks in advance.

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• Obey server_name in Nginx

  - by pascal

  I want nginx/0.7.6 (on debian, i.e. with config files in /etc/nginx/sites-enabled/) to serve a site on exactly one subdomain (indicated by the Host header) and nothing on all others. But it staunchly ignores my server_name settings?! In sites-enabled/sub.domain: server { listen 80; server_name sub.domain; location / { … } } Adding a sites-enabled/00-default with server { listen 80; return 444; } Does nothing (I guess it just matches requests with no Host?) server { listen 80; server_name *.domain; return 444; } Does prevent Host: domain requests from giving results for Host: sub.domain, but still treats Host: arbitrary as Host: sub-domain. The, to my eyes, obvious solution isn't accepted: server { listen 80; server_name *; return 444; } Neither is server { listen 80 default_server; return 444; } Since order seems to be important: renaming 00-default to zz-default, which, if sorted, places it last, doesn't change anything. But debian's main config just includes *, so I guess they could be included in some arbitrary file-system defined order? This returns no content when Host: is not sub.domain as expected, but still returns the content when Host is completely missing. I thought the first block should handle exactly that case!? Is it because it's the first block? server { listen 80; return 444; } server { listen 80; server_name ~^.*$; return 444; }

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• Installation Error on Windows Vista: "Side-by-Side configuration is incorrect"

  - by Maxim Z.

  NOTE: This is not a dupe of this other question. That question refers to a similar problem with 2 programs, while I'm only having it with 1, so the solution there doesn't apply to my situation. My relative asked me to install H&R Block 2009 on his Windows Vista 32-bit computer. I ran the installation program, which succeeded, but when I try to open the application itself, it gives me the following error: The application failed to start because its side-by-side configuration is incorrect. Please see the application event log for more detail. Here are the steps I've done so far to try and remedy this problem: In elevated command prompt, run the command: sfc /scannow Uninstall H&R Block 2009 Uninstall Microsoft Visual C++ 2005 Redistributable Reinstall Microsoft Visual C++ 2005 Redistributable by downloading from MSFT website Reinstall H&R Block 2009 This didn't fix it. I've searched for a long time and haven't found anything that works. The H&R Block site itself states that the way to fix this problem is to uninstall and reinstall H&R Block 2009. Has anyone run into this issue before? If so, how can I fix it? Thanks in advance.

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• BGP Multihomed/Multi-location best practice

  - by Tom O'Connor

  We're in the process of designing a new iteration of our network where we improve resilliency by adding a second datacentre. We'll be adding a second datacentre, with an identical configuration of servers as our primary location. To achieve network connectivity, we're looking into a couple of possible methods. See earlier questions http://serverfault.com/questions/86736/best-way-to-improve-resilience and http://serverfault.com/questions/101582/dns-round-robin-failover-and-load-balancing I'm pretty convinced that BGP is the right way to go about this, and this question is not about RRDNS. 1) If we have 2 locations, do we announce the same IP address block from both locations? 2) If we did this, but had a management ssh interface on x.x.x.50 from datacentre A, but it was on x.x.x.150 in datacentre B. What is the best practice mechanism for achieving this? Because if I were nearest to A, then all my traffic would go to x.50, but if i attempted to connect to x.150, I'd not be able to connect, because this address wouldn't be valid at A, but only at B. Is the best solution to announce 2 different netblocks, one at each location, facilitating the need for RRDNS, or to announce a single block, and run some form of VPN between the two sites for managment traffic?

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• Changing dual-monitor settings without closing the laptop lid on OS X

  - by hekevintran

  I have a Unibody MacBook hooked up to an external display. By default when I boot up, the system will go to dual-monitor mode. I want to use only the external display. The Apple supplied solution to this problem is to close the lid of the laptop which puts the machine into sleep mode and then move the mouse around to wake it up again. Because the machine is being woken up with the lid closed, when the displays are detected the system finds only the external. After the system is functional again, you can open the lid if you want and the laptop screen will be non-functional until you either tell the system to detect displays from the system preferences or you turn off the external display. Every time I want to use only the external display, I must reach my hand over to close the lid, wait for the machine to sleep, jigger the mouse, wait for the machine to wake up, and finally open the lid again because I don't want the machine to overheat. I feel that this is very stupid to have to do. Why is there no button or menu option that says "don't use this screen"? Is there any third-party software way to change the screen setup that does not involve physically closing the lid and playing a game of "are you sleeping" in order to switch such a simple software setting? We are in the 21st Century and honestly this is childish.

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• tail -f and then exit on matching string

  - by Patrick

  I am trying to configure a startup script which will startup tomcat, monitor the catalina.out for the string "Server startup", and then run another process. I have been trying various combinations of tail -f with grep and awk, but haven't got anything working yet. The main issue I am having seems to be with forcing the tail to die after grep or awk have matched the string. I have simplified to the following test case. test.sh is listed below: #!/bin/sh rm -f child.out ./child.sh > child.out & tail -f child.out | grep -q B child.sh is listed below: #!/bin/sh echo A sleep 20 echo B echo C sleep 40 echo D The behavior I am seeing is that grep exits after 20 seconds , however the tail will take a further 40 seconds to die. I understand why this is happening - tail will only notice that the pipe is gone when it writes to it which only happens when data gets appended to the file. This is compounded by the fact that tail is to be buffering the data and outputting the B and C characters as a single write (I confirmed this by strace). I have attempted to fix that with solutions I found elsewhere, such as using unbuffer command, but that didn't help. Anybody got any ideas for how to get this working how I expect it? Or ideas for waiting for successful Tomcat start (thinking about waiting for a TCP port to know it has started, but suspect that will become more complex that what I am trying to do now). I have managed to get it working with awk doing a "killall tail" on match, but I am not happy with that solution. Note I am trying to get this to work on RHEL4.

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• Elevating UAC via .bat file?

  - by jslaker

  Pretty straightforward one that I'm having trouble finding an answer to. serverfault previously helped me with finding a way to automate Windows updates without using WSUS. It's working fantastically, but to run it over the network, you have to first mount a shared drive. That's pretty simple XP since you just mount the drive and run the updater. On Vista and W7, though, this all has to be done with elevated privileges to work correctly. The UAC account can't see network drives mounted by the regular user, so in order to get everything working, I have to mount the share via net use from an escalated shell. I'd like to automate mounting this share and launching the updater via a simple .bat file. I could probably just instruct everybody to right click "Run as Administrator" on the .bat file, but I'd like to keep things as simple as possible and have the .bat automatically prompt the user to escalate their privileges. Since these computers don't belong to us, I can't count on anything like Powershell being installed, so that rules any solution along those lines out and pretty much have to rely on things that would be included in an RTM Vista install. I'm hoping I'm mostly missing something obvious here. :)

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• Cheapest iSCSI SAN for Windows 2008/SQL Server clustering?

  - by MichaelGG

  Are there any production-quality iSCSI SANs suitable for use with Windows Server 2008/SQL Server for failover clustering? So far, I've only seen Dell's MD3000i, and HP's MSA 2000 (2012i), which both are around $6K with a minimal disk configuration. Buffalo (yea, I know), has a $1000 device with iSCSI support, but they say it will not work for 2008 failover clustering. I'm interested in seeing something suitable for failover in a production environment, but with very low IO requirements. (Clustering, say, a 30GB DB.) As for using software: On Windows, StarWind seems to have a great solution. But it's actually more money than buying a hardware SAN. (As I understand, only the enterprise edition supports having replicas, and that's $3000 a license.) I was thinking I could use Linux, something like DRBD + an iSCSI target would be fine. However, I haven't seen any free or low-cost iSCSI software that supports SCSI-3 persistent reservations, which Windows 2008 needs for failover clustering. I know $6K isn't much at all, just curious to see if there are practical cheaper solutions out there. And finally, yes, the software is expensive, but many small business get MS BizSpark, so the Windows 2008 Enterprise / SQL 2008 licenses are completely free.

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• Parental Controls in Ubuntu - per user

  - by Hamish Downer

  I would like to set up parental controls on Ubuntu for a friend of mine. I want it so that the child user has the controls set, but the parent user is not restricted. To be clear, they are sharing one computer, so a router based solution won't help. And I would like a set of step by step instructions to do this. Just one way of doing it. I'm an experienced Ubuntu user, happy at the command line. I've spent quite some time googling for this along the way. I hope that the GChildCare project will eventually make this easy, but it is not ready yet. In the meantime, the WebContentControl GUI provides a way of managing parental controls, but apply them to every user on the computer (easy WebContentContol install instructions and detailed instructions, discussion and related links on ubuntuforums). The ubuntuforums post has a FAQ that states that user-specific configuration is not possible with WebContentControl, and then provides 3 links he used to help him do it. But they are far from step by step instructions. There is this thread which is notes along the way and linking to this article about squid and dansguardian. And then to these two dansguardian articles which are somewhat in depth ... So does anyone know of an existing guide to how to set up parental controls on ubuntu with some users not affected? If no one has come up with an answer after a little bit, I'll set up a community wiki answer so we can come up with a guide.

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• Using AddEncoding x-gzip .gz without actual files

  - by STATUS_ACCESS_DENIED

  With Apache (2.2 and later) how can I achieve the following. I want to transparently compress using GZip encoding (not plain Deflate) the output when a certain file is queried with its name plus the extension .gz, where the .gz version doesn't physically exist on disk. So let's say I have a file named /path/foo.bar and no file foo.bar.gz in the folder to which the URI /path maps, how can I get Apache to serve the contents of /path/foo.bar but with AddEncoding x-gzip ... applied to the (non-existing) file? The rewrite part appears to be easy, but the problem is how to apply the encoding to a non-existent item. The other way around also seems to be simple as long as the client supports the encoding. Is the only solution really a script that does this on the fly? I'm aware of mod_deflate and mod_gzip and it is not what I'm looking for - at least not alone. In particular I need an actual GZIP file and not just a deflated stream. Now I was thinking of using mod_ext_filter, but couldn't bridge the gap between rewriting the name of the (non-existent) file.gz to file on one side and the LocationMatch on the other. Here's what I have. RewriteRule ^(.*?\.ext)\.gz$ $1 [L] ExtFilterDefine gzip mode=output cmd="/bin/gzip" <LocationMatch "/my-files/special-path/.*?\.ext\.gz"> AddType application/octet-stream .ext.gz SetOutputFilter gzip Header set Content-Encoding gzip </LocationMatch> Note that the header for Content-Encoding isn't really needed by the clients in this case. They expect to see actual GZIP files, but I want to do this on-the-fly without caching (this is a test scenario).

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• Permissions on mac for itunes library with multiple users - idea

  - by John

  I currently have a lot of music on an external drive and my itunes set up from there. However, periodically, when the external drive isn't connected, itunes will default back to the library location of my home directory user path. I don't want to mess with an external drive, as my mac HD is large enough to house the music collection. However, I have 4 family members - all with their own logins - using this same gob of music. I don't want 4 copies of the library, only one with all libraries referencing it. So, what I want to do is: 1 - move all music files to a shared directory at /Macintosh HD/users/music. I created this directory and adjusted permissions, so all four users can read and write to this directory. 2 - get all four accounts to reference this library instead of the external or local home locations I am hoping I can just check the box to keep library organized in my account, which is the admin and let itunes move it all. Then delete current libraries for each account and re-add from the new shared location. Will the itunes organization process cause permissions issues either by setting permissions to all the files access to my account only or write permissions or any other 'gotcha'? I am having a hard time coming up with a smooth solution that won't break everything and cause me to have mega duplicates or access issues. I would prefer not to do any xml library file editing if possible. Am I dreaming? Thanks for help.

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• How to connect to a computer that is in Sleep mode over the internet

  - by Gerhard Weiss

  How to connect to a computer that is in Sleep mode over the internet? I am using LogMeIn to connect to another computer offsite. I just installed Windows 7 RC on that system and found that the Sleep mode actually works. Currently LogMeIn does not connect when the system is in Sleep mode or Hibernate mode (that is what their error message displays when you try). Is there a way to get LogMeIn to connect to a system in Sleep mode? Is there other software that gives simliar LogMeIn functionallity (like RDP, etc.) that could be used on Windows 7 instead. I just use LMI for connecting and nothing else (no printing or file transfers). A Non-expensive options (such as free) would be better. I have seen web sites mentioning "Wake on LAN". Does anyone have some good links on how to set this up to be accessed over the internet? Edited: It looks like LogMeIn BETA might be the solution. https://beta.logmein.com/welcome/nextgen/ Has anyone tried this beta yet?

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