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• How can I merge multiple Compass Resources into one, with one score?

  - by Brent Fisher

  I am trying to integrate compass into my platform using the JDBC ResultSetToResourceMapping. What I want to do is set it up so that I could have multiple result set mappings, tied to one Resource, that produces one result, with one score, and a merged score. I have tried to trick Compass into doing this by mapping the same id across them, even though the property fields are different, but it just ends up giving me separate hits for each. E.g. I have the following Data Model, Cases and Comments. One case might have several comments. Say I search for a term that appears in multiple comments. Right now, I a hit for each one, each with a different score. Is there a way that I could merge or aggregate those hits into one hit? Say, instead of Score Entity ID Snippets 100.0% Case 3558 ... The fox jumped over the lazy dog ... 60.0% Case 3558 ... In Alabama today, three jumping turtles were ... 25.0% Case 3558 ... Three jumpers fled the scene... I get Score Entity ID Snippets 100.0% Case 3558 The fox jumped over the lazy dog ...In Alabama today, three jumping turtles were ... Three jumpers fled the scene... Where the latter score is an aggregated score.

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• Is C++ (one of) the best language to learn at first

  - by AlexV

  C++ is one of the most used programming language in the world since like 25+ years. My first job as programmer was in C++ and I coded in C++ everyday for nearly 4 years. Now I do mostly PHP, but I will forever cherish this C++ background. C++ has helped me understand many "under the hood" features/behaviors/restrictions of many other (and different) programming languages like PHP and Delphi. I'm a full time programmer for 6+ years now and since I have a quite varied programming background I often get questions by "newbies" as where to start to become a "good" programmer. I think C++ is one of the best language to start with because it gives you a real usefull experience that will last and will teach you how things work under the hood. It's not the easier one to learn for a newbie, but in my opinion it's one that will reward in the long term. I would like to know your opinion on this matter to add to my arguments when I guide "newbies". After this introduction, here's my question : Is C++ (one of) the best language to learn at first for you. Since it's subjective, I've marked this question as community wiki. EDIT: This question is not about why Java (or C# or any other language) is better than C++ to start with, it's about what's make C++ a good choice or not a good choice to learn as one of your firsts languages. For example, for me C++ made me understand how the memory works. Now today in many languages everything is managed by the garbadge collector and some people don't even know that. I'm glad I know how it works underneath and I think it can help you to write better code.

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• jQuery panels - close one when opening another

  - by justme

  I have two slide panel in the same page. Need that, when one is open and the and user clicks on the other one, that makes, at the same time, close the first one when opening the second. Now they are overlapping... Can you help me, please? thanks This is what i have on the page: I have two slide panel in the same page. Need that, when one is open and the and user clicks on the other one, that makes, at the same time, close the first one when opening the second. Now they are overlapping... Can you help me, please? thanks This is what i have on the page <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $(".btn-slide").click(function(){ $("#panel").slideToggle('fast'); $("#panel2").slideToggle("fast"); $(this).toggleClass("active"); }); }); $(document).ready(function(){ $(".btn-slide2").click(function(){ $("#panel2").slideUp('fast'); $("#panel").slideToggle("fast"); $(this).toggleClass("active"); }); </script>

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• CakePHP update multiple elements in one div

  - by sw3n

  The idea is that I've 3 ajax links and each link is coupled to one single element (a form). The element will be loaded in one div. Each time when you click on a different link, the element that is requested before must be removed and the new one must come in there. So it has to update the DIV. The problem is, that it request the element, but it does not remove the other one. So when you click one the first link, it shows the first element, click on the second link and it puts the second element beneath them, and with the third one will happen exactly the same. If you clicked all the 3 links, it shows 3 forms right under each other. Some Code: Controller: function view($id) { // content could come from a database, xml, etc. $content = array ( array($this->render(null, 'ajax', '/elements/ga')), array($this->render(null, 'ajax', '/elements/ex')), array($this->render(null, 'ajax', '/elements/both')) ); $this->set('google', $content[$id][0]); // use ajax layout $this->render('/pages/form', 'ajax'); } View code: echo $ajax-link( 'Google', array( 'controller' = 'analytics', 'action' = 'view', 0 ), array( 'update' = 'dynamic1')); echo ' | '; echo $ajax-link( 'Exact', array( 'controller' = 'analytics', 'action' = 'view', 1 ), array( 'update' = 'dynamic1', 'loading' = 'Effect.BlindDownUp(\'dynamic1\')')); echo ' | '; echo $ajax-link( 'Beide', array( 'controller' = 'analytics', 'action' = 'view', 2 ), array( 'update' = 'dynamic1', 'loading' = 'Effect.BlindDown(\'dynamic1\')' )); echo $ajax-div('dynamic1'); echo $google; echo $ajax-divEnd('dynamic1');

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• Many-to-many relations in RDBMS databases

  - by Industrial

  What is the best way of handling many-to-many relations in a RDBMS database like mySQL? Have tried using a pivot table to keep track of the relationships, but it leads to either one of the following: Normalization gets left behind Columns that is empty or null What approach have you taken in order to support many-to-many relationships?

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• How do I count the number of occurrences of a char in a String?

  - by Bart

  I have the string a.b.c.d I want to count the occurrences of '.' in an idiomatic way, preferably a one-liner. (Previously I had expressed this constraint as "without a loop", in case you're wondering why everyone's trying to answer without using a loop).

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• Assign to a slice of a Python list from a lambda

  - by Bushman

  I know that there are certain "special" methods of various objects that represent operations that would normally be performed with operators (i.e. int.__add__ for +, object.__eq__ for ==, etc.), and that one of them is list.__setitem, which can assign a value to a list element. However, I need a function that can assign a list into a slice of another list. Basically, I'm looking for the expression equivalent of some_list[2:4] = [2, 3].

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• BULK INSERT from one table to another all on the server

  - by steve_d

  I have to copy a bunch of data from one database table into another. I can't use SELECT ... INTO because one of the columns is an identity column. Also, I have some changes to make to the schema. I was able to use the export data wizard to create an SSIS package, which I then edited in Visual Studio 2005 to make the changes desired and whatnot. It's certainly faster than an INSERT INTO, but it seems silly to me to download the data to a different computer just to upload it back again. (Assuming that I am correct that that's what the SSIS package is doing). Is there an equivalent to BULK INSERT that runs directly on the server, allows keeping identity values, and pulls data from a table? (as far as I can tell, BULK INSERT can only pull data from a file) Edit: I do know about IDENTITY_INSERT, but because there is a fair amount of data involved, INSERT INTO ... SELECT is kinda of slow. SSIS/BULK INSERT dumps the data into the table without regards to indexes and logging and whatnot, so it's faster. (Of course creating the clustered index on the table once it's populated is not fast, but it's still faster than the INSERT INTO...SELECT that I tried in my first attempt) Edit 2: The schema changes include (but are not limited to) the following: 1. Splitting one table into two new tables. In the future each will have its own IDENTITY column, but for the migration I think it will be simplest to use the identity from the original table as the identity for the both new tables. Once the migration is over one of the tables will have a one-to-many relationship to the other. 2. Moving columns from one table to another. 3. Deleting some cross reference tables that only cross referenced 1-to-1. Instead the reference will be a foreign key in one of the two tables. 4. Some new columns will be created with default values. 5. Some tables aren’t changing at all, but I have to copy them over due to the "put it all in a new DB" request.

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• Using build with a has_one association in rails.

  - by espinet

  This is a really noob question but im having trouble finding the answer, is there a way in rails to have 0 or 1 association? For example, I create a user with no objects, than later on create an object for that user. I tried using build with a 'has_one' association but that blew up... The only way I see this working is using 'has_many'. The user is suppose to only have at most one of these objects, is there any way to do this?

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• KVM with one host IP and a different subnet for machines

  - by Jguy

  I've already setup a KVM host with proper IP configurations, but my host had me create DHCP and use that to assign the IP's to the machines. I want to see if there's an easier way to do it (or better). Upon my first setting out on this, I didn't find anything that pointed me in the right direction. I'm coming off a fresh install of Debian 6.0 x64, so I have nothing installed. I've logged in, queried for the below information and changed the password from my host set one. I have a Debian 6.0 x64 system with the following initial network configuration (substituted 255 in place of my real first octave): # tail /etc/network/interfaces auto eth0 iface eth0 inet static address 255.9.24.80 broadcast 255.9.24.95 netmask 255.255.255.224 gateway 255.9.24.65 # default route to access subnet up route add -net 255.9.24.64 netmask 255.255.255.224 gw 255.9.24.65 eth0 I have a /29 subnet that I want the virtual machines to use from my host: IP: 255.46.187.152 /29 Mask: 255.255.255.248 Broadcast: 255.46.187.159 Usable IP addresses: 255.46.187.153 to 255.46.187.158 I like the interface of Cloudmin, so I want to try and use that if I can to administrate my guests. So, my questions: How do I set this up on the host system the best so that I can use the additional Subnet IP's on the guests and have them accessible from the internet? I also need to host a DNS server, which means one of these VM's has to have two IP's assigned to it and accessable from the outside world. How can I do that using Cloudmin? I had a question about this here: Multiple IP addresses assigned to one KVM VM But I just reformatted the entire server and am trying to figure out a better way of doing this. Machine information: # ip route show 255.9.24.64/27 via 255.9.24.65 dev eth0 255.9.24.64/27 dev eth0 proto kernel scope link src 255.9.24.80 default via 255.9.24.65 dev eth0 brctl is empty # ip addr list 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether c8:60:00:54:b5:d8 brd ff:ff:ff:ff:ff:ff inet 255.9.24.80/27 brd 255.9.24.95 scope global eth0 inet6 fe80::ca60:ff:fe54:b5d8/64 scope link valid_lft forever preferred_lft forever Thank you for any help you can provide me. EDIT: I've installed kvm and cloudmin: aptitude install qemu-kvm libvirt-bin wget http://cloudmin.virtualmin.com/gpl/scripts/cloudmin-kvm-debian-install.sh ./cloudmin-kvm-debian-install.sh Rebooted and now my network configuration looks like this: # device: eth0 iface eth0 inet manual # default route to access subnet iface br0 inet static address 255.9.24.80 netmask 255.255.255.224 broadcast 255.9.24.95 network 255.9.24.64 bridge_ports eth0 gateway 255.9.24.65 I setup in Cloudmin the Start IP as 255.46.187.153 and End IP as 255.46.187.158. The CIDR is 29 and the gateway is 255.46.187.152. I've installed a guest with ubuntuserver 12.04 x64, which was able to get and retrieve internet resources during installation, but now cannot reach anything nor can it be reached from anything. Its network configuration is: iface eth0 inet static address 255.46.187.153 netmask 255.255.255.224 broadcast 255.46.187.159 gateway 255.46.187.152 dns-nameservers <host provided nameservers> And is not able to ping google.com through DNS or direct IP, I can't ping the VM from the outside or the host. any ideas now?

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• Remote Desktop - remote computer that was reached is not the one you specified

  - by Jim McKeeth

  We just setup some new Windows 2008 R2 servers and we are unable to Remote Desktop into them from our Windows 7 desktops. Remote desktop connects, but after we provide credentials we get: The connection cannot be completed because the remote computer that was reached is not the one you specified. This could be caused by an outdated entry in the DNS cache. Try using the IP address of the computer instead of the name. If we connect from Windows 7 to a machine not running Windows 2008 R2, or from a machine not running Windows 7 to the Windows 2008 R2 server, it works fine. Likewise if we connect to the Windows 2008 R2 server from Windows 7 via the IP address then it works fine (although that causes other problems later). I've only found one other mention of someone having this problem, so I don't think it is just our network. Any suggestions on how to connect from Windows 7 to Windows 2008 R2 via DNS? Both are 64-bit. Update: Turns out it does not need to be R2 to get the error. We have another server that is Windows 2008 R1 64-bit that also fails.

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• Plesk Postfix SMTP 550 5.7.1 "Command rejected" for one external sender

  - by Mnebuerquo

  My server is rejecting emails from one external sender. I suspect this might be misconfiguration on the sending server, but I'm not sure from these error messages. The non-delivery report message the sender gets contains this text: #5.7.1 smtp;550 5.7.1 Command rejected> #SMTP# I also see this message in /var/messages at about the same time as the rejection message was sent, though I'm not sure if it's actually related: Nov 29 12:29:28 localhost postfix/smtpd[31829]: sql_sqlite3 plugin: no result found I'm using Plesk 10.4.4 Update #47, Centos 6.2, Postfix 2.8.4-11100615 on my mail server. This is only happening for one sender so far, but I found a Google result on experts-exchange.com which seemed to identify the same problem and with the same sending domain. This was posted back in June, and currently has no answers, so even if I was a paying customer it wouldn't be answered. (http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Q_27760746.html) The generating server is bigfish.com. What I need to determine is if this is a problem on my server or a problem with bigfish.com. Is there more information I can find in config files, logs, etc. to figure this out?

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• Apache (Solaris 10): 2 symlinks to the same file, one works the other doesn't

  - by justcatchingrye

  I'm seeing a strange issue with Apache I have a system that pulls a configuration file from a web server. I want to use a symlink with the name 'ocds-dpsarch01a.rules'. This doesn't work. However, if I change one character in that name and link it to the same file, it works - See below I can't think of any reason why one symlink would work when another doesn't? I would have thought either the Apache configuration is right and all symlinks work, or it isn't and no syslinks work(?) Any thoughts welcome ls -l /REMOVED/apache2/htdocs/rules/syslog/*cds-dpsarch01a.rules lrwxrwxrwx 1 root root 62 May 13 13:55 ocds-dpsarch01a.rules - /REMOVED/apache2/htdocs/templates/syslog/DCM_SST_DPST_01.rules lrwxrwxrwx 1 root root 62 May 13 13:52 xcds-dpsarch01a.rules - /REMOVED/apache2/htdocs/templates/syslog/DCM_SST_DPST_01.rules 1) Application starting and successfully reading configuration from the web server 13/05/2010 13:56:37: Information: Connecting ... 13/05/2010 13:56:37: Debug: Reading REMOVED:// REMOVED /rules/syslog/xcds-dpsarch01a.rules 13/05/2010 13:56:37: Debug: HTTP response: HTTP/1.1 200 OK Date: Thu, 13 May 2010 13:56:34 GMT Server: Apache Last-Modified: Fri, 09 Apr 2010 12:28:26 GMT ETag: "5073-a744-ee92ae80" Accept-Ranges: bytes Content-Length: 42820 Cache-Control: max-age=5 Expires: Thu, 13 May 2010 13:56:39 GMT NL7C-Filtered: Content-Type: text/plain Connection: close 13/05/2010 13:56:37: Debug: Plain text rules file detected. 2) Application starting and failing to read configuration from the web server 13/05/2010 13:56:55: Information: Connecting ... 13/05/2010 13:56:55: Debug: Reading REMOVED :// REMOVED /rules/syslog/ocds-dpsarch01a.rules 13/05/2010 13:56:55: Debug: HTTP response: HTTP/1.1 403 Forbidden Date: Wed, 12 May 2010 15:25:11 GMT Server: Apache Vary: accept-language,accept-charset Accept-Ranges: bytes Connection: close Content-Type: text/html; charset=iso-8859-1 Content-Language: en Expires: Wed, 12 May 2010 15:25:11 GMT 13/05/2010 13:56:55: Error: HTTP: HTTP/1.1 403 Forbidden Date: Wed, 12 May 2010 15:25:11 GMT Server: Apache Vary: accept-language,accept-charset Accept-Ranges: bytes Connection: close Content-Type: text/html; charset=iso-8859-1 Content-Language: en Expires: Wed, 12 May 2010 15:25:11 GMT 13/05/2010 13:56:55: Error: HTTP GET failed 13/05/2010 13:56:55: Error: Failed to open Rules file: REMOVED :// REMOVED /rules/syslog/ocds-dpsarch01a.rules

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• osx bash grep - finding search terms in a large file with one single line

  - by unsynchronized

  Is there simple unix command line i can enter which lets me isolate say 512 bytes either side of a search term, even if there is only one "line" in a very large text file? Ok, this should be easy. Famous last words. I'm not that familiar with grep, but it seems it is mainly used to filter out lines in the input that contain search terms. I have a very large json file that I downloaded that i want to search for a particular term. before you click the link - it's over 244MB so be warned - it is from the internet wayback machine and contains lists of zip files of archived photos. i am trying to find mine. Their web interface is broken, so i found the json file that they make public here - it's the last one on the list. when i grep looking for my username, it finds it, but proceeds to dump that line to the console. the problem is that line is 244MB long, and it's the only line in the file. i tried using less, but could not get that to do much - it's very slow, and seems to have the same issue. is there simple unix command line i can enter which lets me isolate say 512 bytes either side of a search term?

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• VPS with Plesk, one ip, and godaddy (definely need help)

  - by Francesco

  Hi there, here's my situation : i've Plesk 8.3.0 with one IP and i've registered my domains at godaddy.com My problem : i cannot figure out how to configure plesk and godaddy to have my domains (6) properly working into the VPS. i've only one IP, so i can't have my personal NS and need to use godaddy ns. But.. how do i set all the stuff ? I've made a try but it's not working. Please take a look : This is an example of how the domain i'm actually working on is configured On Plesk : Host Record type Value 1.2.3.4 / 24 PTR mydomain.com. ftp.mydomain.com. CNAME mydomain.com. mail.mydomain.com. A 1.2.3.4 ns.mydomain.com. A 1.2.3.4 mydomain.com. NS ns.mydomain.com. mydomain.com. A 1.2.3.4 mydomain.com. MX (10) mail.mydomain.com. webmail.mydomain.com. A 1.2.3.4 www.mydomain.com. CNAME mydomain.com. On godaddy,(Total DNS Control) for the same domain i have this setup : A (Host) Host Points To TTL Actions * 1.2.3.4 1 Hour CNAMES (Aliases) Host Points To TTL Actions e email.secureserver.net 1 Hour email email.secureserver.net 1 Hour ftp @ 1 Hour imap imap.secureserver.net 1 Hour mail pop.secureserver.net 1 Hour mobilemail mobilemail-v01.prod.mesa1.secureserver.net 1 Hour pda mobilemail-v01.prod.mesa1.secureserver.net 1 Hour pop pop.secureserver.net 1 Hour smtp smtp.secureserver.net 1 Hour webmail webmail.secureserver.net 1 Hour www @ 1 Hour MX (Mail Exchange) Priority Host Goes To TTL Actions 10 @ mailstore1.secureserver.net 1 Hour 0 @ smtp.secureserver.net Host Points To TTL Actions @ ns53.domaincontrol.com @ ns54.domaincontrol.com What should i correct ? Thanks for helping me Francesco

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• Reconfiguring, then deleting obsolete pagefile.sys from C: in one go using a batch script

  - by DanielSmedegaardBuus

  I'm trying to set up an automated script for a Windows XP installer. It's a batch script that runs on first boot after installation, and among the things I'm trying to accomplish, is removing the pagefile from C: entirely, and putting a 16-768 MB pagefile on D: instead. Here're my batch file instructions: echo === Creating new page file on D: ... cscript %windir%\system32\pagefileconfig.vbs /create /i 16 /m 768 /vo d: >nul echo. echo === Removing old page file from C: ... cscript %windir%\system32\pagefileconfig.vbs /delete /vo C: attrib -s -h c:\pagefile.sys del c:\pagefile.sys My problem is that while these are sane commands, the removal of the pagefile on C: requires me to reboot before those commands succeed.b Or, in other words — I have to first create the D: pagefile, then reboot and delete the c:\pagefile.sys file, or I'm stuck with a c:\pagefile.sys file which isn't even recognized by Windows itself (it'll just say that there's a page file on D:, and that C: has no pagefile at all). Obviously because already some pages are written to the C:\pagefile.sys file. So how would I go about accomplishing this in one go? Or, in two gos, if this is "batch scriptable" :) TIA, Daniel :) EDIT: I should probably clarify: Running those commands above are all valid, but they'll only succeed fully if I re-run the "attrib" and "del" commands at next boot. The C: pagefile is in use at the time, so I cannot delete the file it uses, and Windows itself won't remove it when I configure it to not use C: as a page file drive. Instead, it'll leave an orphaned c:\pagefile.sys file behind (which is really large). I don't necessarily need this to work in one go, registering the last two commands to run after a reboot would also be great :)

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• Move postfix maildir files from one mail server to another

  - by Tauren

  I have a new mail server configured as described in this howto: http://howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-ubuntu-9.10 I also have an ancient mail server configured very similarly (using the same HOWTO, just for Fedora Core 6, if I recall correctly). Earlier today I had to switch from the old server to the new one, and the old one is no longer online. However, after I had migrated everything and switched it all over, I discovered a bunch of undelivered mail in the queue. It got delivered to the local mailboxes on the old server, so now there are a bunch of messages on it that I'd like to move to the new server. The new server has already received new messages, so I need to merge the files together somehow. For each user with an email of [email protected], there are files like this on both servers: /home/vmail/customer.com/username/maildirsize /home/vmail/customer.com/username/courierpop3dsizelist /home/vmail/customer.com/username/new/1271481177.Vca01I6006bM580357.mailhost.mydomain.com Can I simply copy the hundreds of files in the various new directories on the old server to the corresponding new directories on the new server? Will the maildirsize and courierpop3dsizelist files get updated automatically, or do I need to do something to update them?

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• Use one NIC to create multiple interfaces for Linux KVM

  - by Phanto

  I am working on a thesis research project, and I am having some difficulty figuring out how to make one NIC spawn several "bridge" interfaces such that each KVM VM can be seen on the local network. I am very new to KVM, and am still exploring what it can do. Below is the scenario that I am attempting to make (on a CentOS/RHEL 6 system): Linux KVM Host has 1 NIC (eth0) connected to a switch. Create multiple "bridge" or equivalent interfaces that are spawned off of eth0 that would provide a unique IP for each VM. This is so that each VM can communicate with other hosts on the network, and that other hosts on the network can communicate with the VM. IMPORTANT: I would like iptables on the KVM host to be able to manipulate/control/restrict the traffic that would be sent on those "bridge" interfaces. I would like to create a minimum of three VM's, each using their own unique "bridge" interfaces. I have previously made a br0 interface off of eth0, but unfortunately, I am unable to add any more to it. It appears that you can only bridge 1 interface to the NIC. I would like to bridge many to one. Would a tap device be able to do this? If so, how would it be set up? Effectively, I am attempting to replicate what can easily be created with VirtualBox on Windows, where each VM is given a "bridged" interface, and can live on the network. I want to achieve this very same thing with Linux KVM. Thank You EDIT: To be more descriptive, I want to achieve something that looks like this: This can be found on this page: http://en.gentoo-wiki.com/wiki/KVM#Networking_2 HOST +---------------+ | | KVM GUEST1 | | +--------------+ | +------+ | | | LAN ---+--- eth0 | +--+---+---- nic0 | KVM GUEST2 | | tap0----+ | |192.168.1.13 | +--------------+ | | tap1----+ | +--------------+ | | | +------+ | | | | | br0 +--+----------------------+---- nic0 | |192.168.1.12 | |192.168.1.14 | +---------------+ +--------------+

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• Multiple IP's using one NIC connectivity problem - Windows

  - by Vincent

  I have a frame relay network that is directly connected to a GPRS network. I also have a ADSL high speed network and recently I have been trying to achieve the following network configuration using windows 7 (Also tried XP) with no success to date. On one server I have two NIC's NIC1 I would like the following two static IP address's 10.0.1.110 and 10.0.1.200 the cisco router has a default gateway of 10.0.1.1 the ADSL is DHCP. NIC1 and the cisco router do not have access to the internet. NIC2 is setup for DHCP with a primary DNS and secondary DNS configured to enable internet connectivity. With NIC1 all incoming TCP connections are from IP address's starting with 10.192.x.x I cannot establish a TCP connection to both 10.0.1.110 and 10.0.1.200. Its either one or the other. I have a static route implemented in windows of: route -p 10.192.0.0 mask 255.255.0.0 10.0.1.1 metric 1 I have tried leaving out the gateway in the NIC1 and many other combinations with no success. Can anyone please help? What am I doing wrong?

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• Multiple Servers + One MailServer

  - by theomega

  Hy, I got several Linux-Servers (running Debian) where different services run: Database-Servers, Webservers, Applicationsservers, Tools and so on. All Servers are connected to the same internal network. There is also one special Server which is the Mail-Server: All Mailaccounts are stored on this server, it is also the outbound Mailserver for all the other servers. I want all Mails for all servers to get saved on the Mailserver. For example if an cron-job fails on one of the web-servers the mail should not be delivered to the local user but instead to the Mailserver so I get a centralized place for mail storage. How do you set up this scenario? My current setup is: Using postfix as MTA on the Mailserver and using ssmtp on all the other servers. SSMTP is configured to send the mails to the Mailserver. The Mailserver is configured to allow the whole internal network to relay mails using itself. Is this the right way to choose? I also thought about setting up a MTA (postfix) on every server and configure it somehow to forward the mails. What would be the advantage of this solution?

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• Have it fixed or buy a new one?

  - by Workshop Alex

  My dual-monitor system has just become a single-monitor system again when the older monitor decided it would be nice to just turn to black. It's a Samsung LCD monitor and is over three years old. Not sure if the warranty is still valid but I just wonder what option would me more efficient: 1) Have the monitor fixed for a small amount. 2) Buy a new monitor for a slightly bigger amount. When monitors were still expensive, I wouldn't doubt about this and would just have my monitor repaired. But prices are so low nowadays, (and repairs are expensive) that I wonder if it's worth the trouble... Of course, I'm in no hurry since I still have another monitor. It's just that I liked the dual-monitor setup. Solved! Just ordered a new monitor. A Samsumg Syncmaster T260HD 25,5". Much more than it would cost me if I just had my old one repaired but I noticed that this one has a build-in TV tuner, plus speakers. It's way more expensive than a repair, but it's worth the additional value it provides.

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• One-To-Many Powershell Scripts

  - by Matt

  I'm trying to create a script to run as a scheduled task, which will run against multiple servers and retrieve some information. To start with, I populate the list of servers by querying AD for all servers that match a certain set of criteria, using Get-ADComputer. The problem is, the list is returned as an object, which I can't then pass to the New-PSSession list. I have tried converting it to a comma-seperated string by doing the following: foreach ($server in $serverlist) {$newlist += $server.Name + ","} but this still doesn't work. the alternative is to iterate through the list and run the various commands against each server one at a time, but my preference would be to avoid this and run them using one-to-many remoting. UPDATE: To clarify what I want to end up being able to do is using -ComputerName $serverlist, so I want $serverlist to be a string rather than an object. UPDATE 2: Thanks for all the suggestions. Between them and my original method I'm starting to wonder whether -ComputerName can accept a string variable? I've got varying degrees of success getting the list of computers converted to a comma separated string, but no matter how I do it I always get invalid network address.

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• Debian, 2 NICs load-balancing or agregating with one same gateway

  - by pouney

  Hi, I have one server, with double NICs connected to one switch with the same gateway. Behind the switch we have internet. |Debian| - eth0 - switch - internet - eth1 - same I don't understand how to load-balancing between eth0 and eth1. The inbound/outbound traffic always use eth1. This is the config: # The primary network interface allow-hotplug eth0 auto eth0 iface eth0 inet static address 192.168.248.82 netmask 255.255.255.240 network 192.168.248.80 broadcast 192.168.248.95 gateway 192.168.248.81 allow-hotplug eth1 auto eth1 iface eth1 inet static address 192.168.248.83 netmask 255.255.255.240 network 192.168.248.80 broadcast 192.168.248.95 gateway 192.168.248.81 Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.248.80 0.0.0.0 255.255.255.240 U 0 0 0 eth1 192.168.248.80 0.0.0.0 255.255.255.240 U 0 0 0 eth0 0.0.0.0 192.168.248.81 0.0.0.0 UG 0 0 0 eth1 0.0.0.0 192.168.248.81 0.0.0.0 UG 0 0 0 eth0 Ips aren't real, it's just for the example. Anybody have an idea on correct routing to use eth0 on 192.168.248.82 and eth1 on 192.168.248.83 ? I have many example for multiple gateway but here it's the same. Thanks all. Regards

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• One server with multiple desktops "heads" with VNC

  - by Alexis K

  I am managing a system of kiosks. Each kiosk currently is running a web browser with the application for the kiosk running in the browser. Each kiosk needs to be able to display separate content. At times, the application running in the web browser freezes. Thus, I have to go out to the site to refresh the page. I want to see if there is a way to have one central server that has multiple browser heads. Then each kiosk would run a program like VNC to display one of the heads. This way when the program freezes, I just have to login to the central server and refresh the page. Getting VNC or another remote desktop software installed on the clients is no problem. What I am looking for is a way to have VNC remote into a specific head of a head of a web browser. Does such a thing exist? Or do I have to run a VM for each kiosk to remote into? Any advice, pointers, or solutions would be helpful.

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• Two monitors with Mac Mini - one displays black despite receiving a signal

  - by alex

  My Mac Mini outputs to my two new monitors - Dell U2311Hs. The LED on the bezel displays blue when receiving a signal, or yellow otherwise. Both screens are displaying blue. It also seems my Mini can see both of them... However, one of them is black. It just displays black, but appears to be receiving a signal (when I turn the Mac off, it then displays No Signal). To make things weirder, on startup, the boot up (white with Apple logo) appears on the right monitor (the one that now displays black). Occasionally, it flickers up on the black screen for 1 second. I have tried Detect Displays. It appears to do nothing. I'm also running a dual monitor KVM. Video connections are DVI-D. How can I fix this situation? Thanks. Update This is the weirdest thing - I used the DVI-D cable that came with the KVM and it seems to have fixed it - I didn't both because it looks identical to any other DVI cable (in form an pin out). So, I will accept an answer if someone can tell me what may be the difference in these cables?

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