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• Very weird jquery/json problem...

  - by Scarface

  Hey guys I have finally located the cause of this problem...I just have no idea how to fix it and why it is happening. I have a jquery getjson function and it returns 0 results every 2-5 clicks on new topics or refreshes. For some reason if I change my query to sort results by ASC it always returns results and much quicker, but this poses a problem since I need results by DESC. If anyone has any ideas, I would greatly appreciate it because I am dumbfounded at this point. Here is my query but I need it by DESC SELECT time, user, message FROM comments WHERE topic_id='$topic_id' ORDER BY time ASC LIMIT 10 $.getJSON(files+"comments.php?action=view&load=initial&topic_id="+topic_id+"&t=" + (new Date()), function(json) { if(json.length) { for(i=0; i < json.length; i++) { $('#comment-list').prepend(prepare(json[i])); $('#list-' + count).fadeIn(1500); } } }); I return results like so while($row = mysql_fetch_array($res)){ $data[] = $row; } $out = json_encode($data); print $out;

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• IE showing hidden div under certain circumstances

  - by karola

  After googling around and finding a lot of ie bugs I still did not find a description of the problem I have. The initial situation is a standard one. We have a tooltip which is actually a hidden div that will be displayed on mouseover at a given location. The div is hidden with display:none and contains a table with the content. We tried different libraries for showing the div (scriptaculous and jQuery Cluetip) but the effect is the same. The problem: Everything is fine as long as the contents fits the width of my window. But when I resize it until the horizontal scrollbar is activated the content of the hidden div will be shown at the end of the page when the tooltip is activated. This is really strange as it happens only under these premises. When more than one tooltip is involved the browser might even crash (and under Vista takes the whole system with him duh). I know it's a bit complicated to explain but I hope that someone at least had heard of that bug and can point me into the right direction.

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• printSoln module problem

  - by dingo_d

  Hi I found in book:Numerical Methods in engineering with Python the module run_kut5, but for that module I need module printSoln, all provided in the book. Now I cp the code, made necessary line adjustments and so. The code looks like: # -*- coding: cp1250 -*- ## module printSoln ''' printSoln(X,Y,freq). Prints X and Y returned from the differential equation solvers using printput frequency ’freq’. freq = n prints every nth step. freq = 0 prints initial and final values only. ''' def printSoln(X,Y,freq): def printHead(n): print "\n x ", for i in range (n): print " y[",i,"] ", print def printLine(x,y,n): print "%13.4e"% x,f for i in range (n): print "%13.4e"% y[i], print m = len(Y) try: n = len(Y[0]) except TypeError: n = 1 if freq == 0: freq = m printHead(n) for i in range(0,m,freq): printLine(X[i],Y[i],n) if i != m - 1: printLine(X[m - 1],Y[m - 1],n) Now, when I run the program it says: line 24, in <module> m = len(Y) NameError: name 'Y' is not defined But I cp'd from the book :\ So now when I call the run_kut module I get the same error, no Y defined in printSoln... I'm trying to figure this out but I suck :( Help, please...

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• Show image on hover with PHP

  - by Sorosh

  I have a small problem with my PHP code and It would be very nice if someone could help me. I want to display an image when hovering over a link. This is the link with the PHP code that I have now: <a href="<?php the_permalink(); ?>"><?php if ( has_post_thumbnail() ) {the_post_thumbnail();} else if ( has_post_video() ) {the_post_video_image();}?></a> This code shows a image, but I want to execute this code when hovering over the link with the image: <?php echo print_image_function(); ?> The code also shows a image that belongs to a category. I don't want the initial image to disappear I simply want to show the second image on top off the first image when hovering over the first image. I don't know if it is helpful but I use Wordpress and I am not a PHP expert. I even don't know if this is going to work. Thats why I am asking if somebody can help me with this. Thanks in advance

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• Issue creating side-by-side slideshows with jQuery

  - by JShweky

  I'm trying to create a site with 2 slideshows. I've tweaked and re-tweaked the JS and Jquery numerous times. Sometimes one slideshow works perfectly and the other cycles between one picture, other times both work but are out of sync, or the fadeIn doesn't seem to be applied to the second slideshow, or in some variations one slideshow stays frozen on the initial image and just remains static. Anyway, I created a JS Fiddle (link at bottom) and apparently my code is at least free of typos. JS is below, the rest is on the JS Fiddle. Any help would be greatly appreciated. $(document).ready(function () { $(".slider #1").fadeIn(1000); $(".slider #1").delay(2000).fadeOut(1000); var sc = $(".slider img").size(); var count = 2; setInterval(function () { $(".slider #" + count).fadeIn(1000); $(".slider #" + count).delay(2000).fadeOut(1000); if (count === sc) { count = 1; } else { count++; } }, 3500); $(".sliderTwo #7").fadeIn(1000); $(".sliderTwo #7").delay(2000).fadeOut(1000); var sc2 = 12; var count2 = 7; setInterval(function () { $(".sliderTwo #" + count2).fadeIn(1000); $(".sliderTwo #" + count2).delay(2000).fadeOut(1000); if (count2 === sc2) { count2 = 7; } else { count2++; } }, 3500); }); http://jsfiddle.net/gg4PL/

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• C# how to get trailing spaces from the end of a varchar(513) field while exporting SQL table to a fl

  - by svon

  How do I get empty spaces from the end of a varchar(513) field while exporting data from SQL table to a flat file. I have a console application. Here is what I am using to export a SQL table having only one column of varchar(513) to a flat file. But I need to get all the 513 characters including spaces at the end. How do I change this code to incorporate that. Thanks { var destination = args[0]; var command = string.Format("Select * from {0}", Validator.Check(args[1])); var connectionstring = string.Format("Data Source={0}; Initial Catalog=dbname;Integrated Security=SSPI;", args[2]); var helper = new SqlHelper(command, CommandType.Text, connectionstring); using (StreamWriter writer = new StreamWriter(destination)) using (IDataReader reader = helper.ExecuteReader()) { while (reader.Read()) { Object[] values = new Object[reader.FieldCount]; int fieldCount = reader.GetValues(values); for (int i = 0; i < fieldCount; i++) writer.Write(values[i]); writer.WriteLine(); } writer.Close(); }

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• grails services :: multiple projects

  - by naveen

  PROBLEM : I have multiple grails projects (lets say appA, appB and appC) : services to be precise I want to run them in a single grails-app.. probably a war deployment, how can i do this? REQUIREMENTS : I want this to be a single app since i am deploying it on cloud and i don't have enough memory to hold all these service instances individually. The reason for multiple grails project is scalability. So that if later on i want to run 10 instance of appA, 3 instance of appB, and 1 instance of aapC; i should be able to do that. EDIT : Can i use something like 0mq, will that be helpful in keeping the services separated from each other. How will i package my service? And reading the docs of 0mq seems that it can work with both inprocess and external process. Will async grails requests on HTTP work with 0mq in process/ external mq calls. Haven't used 0mq, but from the initial doc it seems to work. Need some experience calls in this scenario. Are there any other alternatives or mq alternatives?

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• dynamic directives in angularjs

  - by user28061

  The directive's attributes don't change when the scope is updated, they still keep the initial value. What am I missing here? HTML <ul class="nav nav-pills nav-stacked" navlist> <navelem href="#!/notworking/{{foo}}"></navelem> <navelem href="#!/working">works great</navelem> </ul> <p>works: {{foo}}</p> Javascript (based on angular tabs example on front-page) angular.module('myApp.directives', []). directive('navlist', function() { return { scope: {}, controller: function ($scope) { var panes = $scope.panes = []; this.select = function(pane) { angular.forEach(panes, function(pane) { pane.selected = false; }); pane.selected = true; } this.addPane = function(pane) { if (panes.length == 0) this.select(pane); panes.push(pane); } } } }). directive('navelem', function() { return { require: '^navlist', restrict: 'E', replace: true, transclude: true, scope: { href: '@href' }, link: function(scope, element, attrs, tabsCtrl) { tabsCtrl.addPane(scope); scope.select = tabsCtrl.select; }, template: '<li ng-class="{active: selected}" ng-click="select(this)"><a href="{{href}}" ng-transclude></a></li>' }; });

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• Infrastructure for high transactional system (language & hosting suggestion help)

  - by RPS

  Some of our friends (University students) are trying to develop a twitter type application, I want to plan for at least 1000 transactions per second (I know it's wishful thinking) for initial launch. This involves several people connecting and getting updates and posting (text + images) to site. In the back end db will server the data and also calculates rankings of what to push to user based on complex algorithm on the fly real-time. Our group is familiar with Java and Tomcat/MySQL. We can also easily learn/code in PHP/MySQL. What is the best suited platform for our purpose ? Though Java seem to be easy to implement for us I am afraid that hosting will be a bit difficult. I could find cloud based php hosting services (like rackspace cloudsites) at reasonable cost. Amazon EC2 is a bit over our heads to manage on day-to-day. Also any recommendation on hosting ? (PHP or Java) We don't have millions in seed money but about $20K to start with. Any advice on above or any thing in general approach is much appreciated.

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• Using jQuery .find() with multiple conditions at the same time?

  - by fuzzybabybunny

  I know that there are other ways of grabbing radio button values, but I want to know how to do this with .find(). I only want to log the value of the selected radio button, so it requires finding by two conditions at the same time: The button with name=area The button with selected=selected <div class="radio"> <label> <input class="track-order-change" type="radio" name="area" id="area1" value="area1" checked="checked"> Area 1 </label> </div> <div class="radio"> <label> <input class="track-order-change" type="radio" name="area" id="area2" value="area2"> Area 2 </label> </div> <div class="radio"> <label> <input class="track-order-change" type="radio" name="area" id="area3" value="area3"> Area 3 </label> </div> When anything with the class track-order-change changes, it will run the function UpdateOrderSubmission. $('.track-order-change').on('change', function() { updateOrderSubmission() }); I want the updateOrderSubmission function to console log the value of the radio button that is selected. var updateOrderSubmission = function() { var orderSubmission = { area: $('#submit-initial-form').find('[name=area],[checked=checked]').this.val() } console.log(orderSubmission) }; The code above doesn't work. How do I grab the value of the selected radio button? I need to do .find() with two conditions (name and checked), not just one condition.

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• Mutate an object into an instance of one its subclasses

  - by Gohu

  Hi, Is it possible to mutate an object into an instance of a derived class of the initial's object class? Something like: class Base(): def __init__(self): self.a = 1 def mutate(self): self = Derived() class Derived(Base): def __init__(self): self.b = 2 But that doesn't work. >>> obj = Base() >>> obj.mutate() >>> obj.a 1 >>> obj.b AttributeError... If this isn't possible, how should I do otherwise? My problem is the following: My Base class is like a "summary", and the Derived class is the "whole thing". Of course getting the "whole thing" is a bit expensive so working on summaries as long as it is possible is the point of having these two classes. But you should be able to get it if you want, and then there's no point in having the summary anymore, so every reference to the summary should now be (or contain, at least) the whole thing. I guess I would have to create a class that can hold both, right? class Thing(): def __init__(self): self.summary = Summary() self.whole = None def get_whole_thing(self): self.whole = Whole()

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• How to compare date from database using C#?

  - by user1490374

  I would like to compare the date selected from the database (every entry in EndDate) and compare them with today date. Is there any way to do this programmatically? Like extracting the dates and comparing them individually? I need this because I need to update the status for the table. string username; username = HttpContext.Current.User.Identity.Name; string date = DateTime.Now.ToString("MM/dd/yyyy"); txtDate.Text = date; SqlConnection conn1 = new SqlConnection("Data Source=mydatasource\\sqlexpress;" + "Initial Catalog = Suite2; Integrated Security =SSPI"); SqlDataAdapter adapter; string end; end = "SELECT EndDate FROM Table_Message WHERE username = '" + username + "'"; adapter = new SqlDataAdapter(end, conn1); conn1.Open(); DataSet ds = new DataSet(); adapter.Fill(ds); //Execute the sql command GridView2.DataSource = ds; GridView2.DataBind(); conn1.Close();

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• Eclipc java,writting a program [closed]

  - by ghassar

  I have an important exercise for that i found in the internet please i need help in using eclipc java thanks i have to design, implement, test and document a Java program (a set of classes) for one of the following problem specifications: Problem 1 – Jubilee Estate Agency Property Management System A local Estate Agent would like a prototype system to keep track of properties that are offered for sale. The Estate Agent sells domestic and commercial properties. You will need to define classes that represent the Estate Agency System. You should design your system and the classes that you will need before starting coding. Your system must have a graphical user interface and be designed and developed using the object-oriented principles of the MVC architecture design pattern i.e. the user interface class must be separate from the other classes. The initial basic requirements for the system are as follows: • Include a list of domestic properties for sale that include details of: address, description, selling price, and number of rooms • Include a list of commercial properties for sale that include details of: address, description, selling price, and area in square metres • Enable the properties that are for sale to be viewed on the screen • Allow the customer to select one or more properties to be placed on a ‘viewing list’ so that the properties can be visited in person • Display on the screen the viewing list that shows the details of the properties chosen • Provide a basic search facility to find properties that are for sale in a particular price band and display the results • Enable a property to be marked as sold

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• Python: Determine whether list of lists contains a defined sequence

  - by duhaime

  I have a list of sublists, and I want to see if any of the integer values from the first sublist plus one are contained in the second sublist. For all such values, I want to see if that value plus one is contained in the third sublist, and so on, proceeding in this fashion across all sublists. If there is a way of proceeding in this fashion from the first sublist to the last sublist, I wish to return True; otherwise I wish to return False. In other words, for each value in sublist one, for each "step" in a "walk" across all sublists read left to right, if that value + n (where n = number of steps taken) is contained in the current sublist, the function should return True; otherwise it should return False. (Sorry for the clumsy phrasing--I'm not sure how to clean up my language without using many more words.) Here's what I wrote. a = [ [1,3],[2,4],[3,5],[6],[7] ] def find_list_traversing_walk(l): for i in l[0]: index_position = 0 first_pass = 1 walking_current_path = 1 while walking_current_path == 1: if first_pass == 1: first_pass = 0 walking_value = i if walking_value+1 in l[index_position + 1]: index_position += 1 walking_value += 1 if index_position+1 == len(l): print "There is a walk across the sublists for initial value ", walking_value - index_position return True else: walking_current_path = 0 return False print find_list_traversing_walk(a) My question is: Have I overlooked something simple here, or will this function return True for all true positives and False for all true negatives? Are there easier ways to accomplish the intended task? I would be grateful for any feedback others can offer!

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• Pagination in Java

  - by user569125

  I wrote paging logic: My requirement: total elements to display:100 per page,if i click next it should display next 100 records,if i click previous 100 records. Initial varaible values: showFrom:1, showTo:100 max elements:depends on size of data. pageSize:100. Code: if(p*emphasized text*aging.getAction().equalsIgnoreCase("Next")){ paging.setTotalRec(availableList.size()); showFrom = (showTo + 1); showTo = showFrom + 100- 1; if(showTo >= paging.getTotalRec()) showTo = paging.getTotalRec(); paging.setShowFrom(showFrom); paging.setShowTo(showTo); } else if(paging.getAction().equalsIgnoreCase("Previous")){ showTo = showFrom - 1; showFrom = (showFrom - 100); paging.setShowTo(showTo); paging.setShowFrom(showFrom); paging.setTotalRec(availableList.size()); } Here i can remove and add the elements to the existing data.above code works fine if i add and remove few elements.but if i remove or add 100 elements at a time counts are not displaying properly above code works fine if i add and remove few elements.

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• PHP suddenly failed after IIS update

  - by James Hay

  All my application pools were stopped this morning after I got to work. I can restart them, but when I try to load the website the app pool crashes again. Update: I've looked in the GAC as the error below suggests and it seems that the file is not there. How do I get it back? Update 2: I found a further error in the event log saying The Module name FastCgiModule path C:\WINDOWS\System32\inetsrv\iisfcgi.dll returned an error from registration. The data is the error. So following the information from here http://forums.iis.net/t/1153937.aspx I removed CGI and my sites are working again. This has fixed the initial problem, but now I don't have FastCGI so I'm fairly sure that PHP will no longer be working (I don't have any PHP at the moment to test). Original Post I'm getting this error in the event viewer: IISMANAGER_ERROR_LOADING_PROVIDER_TYPE IIS Manager could not load type 'Web.Management.PHP.PHPProvider, Web.Management.PHP, Version=1.2.0.0, Culture=neutral, PublicKeyToken=8175de49a9aec91d' for module provider 'PHP' that is declared in %windir%\system32\inetsrv\config\administration.config. Verify that the type is correct, and that the assembly that contains the module provider is in the Global Assembly Cache (GAC). Exception:System.IO.FileNotFoundException: Could not load file or assembly 'Web.Management.PHP, Version=1.2.0.0, Culture=neutral, PublicKeyToken=8175de49a9aec91d' or one of its dependencies. The system cannot find the file specified. File name: 'Web.Management.PHP, Version=1.2.0.0, Culture=neutral, PublicKeyToken=8175de49a9aec91d' at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName) at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.Type.GetType(String typeName, Boolean throwOnError) at Microsoft.Web.Management.Server.AdministrationModuleProvider.GetModuleProvider(String userName, String connectionName) WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. Process:InetMgr Connection:CT211511\Administrator Everything was working fine last night when I left work, and since they've done the maintenance it's all broken.

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• Encouter error "Linux ip -6 addr add failed" while setting up OpenVPN client

  - by Mickel

  I am trying to set up my router to use OpenVPN and have gotten quite far (I think), but something seems to be missing and I am not sure what. Here is my configuration for the client: client dev tun proto udp remote ovpn.azirevpn.net 1194 remote-random resolv-retry infinite auth-user-pass /tmp/password.txt nobind persist-key persist-tun ca /tmp/AzireVPN.ca.crt remote-cert-tls server reneg-sec 0 verb 3 OpenVPN client log: Nov 8 15:45:13 rc_service: httpd 15776:notify_rc start_vpnclient1 Nov 8 15:45:14 openvpn[27196]: OpenVPN 2.3.2 arm-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [MH] [IPv6] built on Nov 1 2013 Nov 8 15:45:14 openvpn[27196]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Nov 8 15:45:14 openvpn[27196]: Socket Buffers: R=[116736->131072] S=[116736->131072] Nov 8 15:45:14 openvpn[27202]: UDPv4 link local: [undef] Nov 8 15:45:14 openvpn[27202]: UDPv4 link remote: [AF_INET]178.132.75.14:1194 Nov 8 15:45:14 openvpn[27202]: TLS: Initial packet from [AF_INET]178.132.75.14:1194, sid=44d80db5 8b36adf9 Nov 8 15:45:14 openvpn[27202]: WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this Nov 8 15:45:14 openvpn[27202]: VERIFY OK: depth=1, C=RU, ST=Moscow, L=Moscow, O=Azire Networks, OU=VPN, CN=Azire Networks, name=Azire Networks, [email protected] Nov 8 15:45:14 openvpn[27202]: Validating certificate key usage Nov 8 15:45:14 openvpn[27202]: ++ Certificate has key usage 00a0, expects 00a0 Nov 8 15:45:14 openvpn[27202]: VERIFY KU OK Nov 8 15:45:14 openvpn[27202]: Validating certificate extended key usage Nov 8 15:45:14 openvpn[27202]: ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication Nov 8 15:45:14 openvpn[27202]: VERIFY EKU OK Nov 8 15:45:14 openvpn[27202]: VERIFY OK: depth=0, C=RU, ST=Moscow, L=Moscow, O=AzireVPN, OU=VPN, CN=ovpn, name=ovpn, [email protected] Nov 8 15:45:15 openvpn[27202]: Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Nov 8 15:45:15 openvpn[27202]: Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Nov 8 15:45:15 openvpn[27202]: Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Nov 8 15:45:15 openvpn[27202]: Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Nov 8 15:45:15 openvpn[27202]: Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 2048 bit RSA Nov 8 15:45:15 openvpn[27202]: [ovpn] Peer Connection Initiated with [AF_INET]178.132.75.14:1194 Nov 8 15:45:17 openvpn[27202]: SENT CONTROL [ovpn]: 'PUSH_REQUEST' (status=1) Nov 8 15:45:17 openvpn[27202]: PUSH: Received control message: 'PUSH_REPLY,ifconfig-ipv6 2a03:8600:1001:4010::101f/64 2a03:8600:1001:4010::1,route-ipv6 2000::/3 2A03:8600:1001:4010::1,redirect-gateway def1 bypass-dhcp,dhcp-option DNS 194.1.247.30,tun-ipv6,route-gateway 178.132.77.1,topology subnet,ping 3,ping-restart 15,ifconfig 178.132.77.33 255.255.255.192' Nov 8 15:45:17 openvpn[27202]: OPTIONS IMPORT: timers and/or timeouts modified Nov 8 15:45:17 openvpn[27202]: OPTIONS IMPORT: --ifconfig/up options modified Nov 8 15:45:17 openvpn[27202]: OPTIONS IMPORT: route options modified Nov 8 15:45:17 openvpn[27202]: OPTIONS IMPORT: route-related options modified Nov 8 15:45:17 openvpn[27202]: OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified Nov 8 15:45:17 openvpn[27202]: TUN/TAP device tun0 opened Nov 8 15:45:17 openvpn[27202]: TUN/TAP TX queue length set to 100 Nov 8 15:45:17 openvpn[27202]: do_ifconfig, tt->ipv6=1, tt->did_ifconfig_ipv6_setup=1 Nov 8 15:45:17 openvpn[27202]: /usr/sbin/ip link set dev tun0 up mtu 1500 Nov 8 15:45:18 openvpn[27202]: /usr/sbin/ip addr add dev tun0 178.132.77.33/26 broadcast 178.132.77.63 Nov 8 15:45:18 openvpn[27202]: /usr/sbin/ip -6 addr add 2a03:8600:1001:4010::101f/64 dev tun0 Nov 8 15:45:18 openvpn[27202]: Linux ip -6 addr add failed: external program exited with error status: 254 Nov 8 15:45:18 openvpn[27202]: Exiting due to fatal error Any ideas are most welcome!

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• Partitioning recommendations for a Proxmox VM Server (OpenVZ)

  - by luison

  We are new to virtualization and we are planning to turn our online server into a virualized one, mainly for maintenance, backup and recovery improvements. Initially we would only have one real virtual system with load plus 1-3 copys for testing and recovering and maybe a small centralized syslog virtual machine. We would like, if possible the host machine to include an iptables plus rsync to back up to other machines and some other global security systems. Due to this and the offerings of our hosting supplier we are mainly considering Proxmox for its simplicity (we like the idea of its web admin panel) and as I also understand that the container approach of OpenVMZ systems may fit well resource wise with our setup. The base system comes with debian so we can personalise it to our requirements. Proxmox installations default installs an LVM partition for the VMs. Our doubts are with the fact of what would be the best partition structure for this considering that: we would like to have a mirror of the root partition we could boot from if required (our provider supports booting the system from another partition via control panel) we ideally would like to have a partition that could be shared among the VM systems. We still don't know if this is possible directly with OpenVMZ containers, otherwise we are considering doing this by sharing it via NFS on the host machine. we want to use the backup system available on the proxmox host administrator to programme VMs backups and then rsync it to another machine. With this based on a Linux Raid of aprox (750Gb) we are considering something like: ext3_1/ - (20Gb) ext3_2/bak_root - (20Gb) mostly unmounted, root partition sync LVM_1 /var/lib/vz - (390Gb) partition for virtual images LVM_2 /shared_data - (30Gb) LVM_3 /backups - (300Gb) where all backups would be allocated Our initial tests with Proxmox seem to have issues with snapshots backups like this, perhaps caused by the fact that they can not be done to another LVM partition (error: command 'lvcreate --size 1024M --snapshot --name vzsnap-ns204084.XXX.net-0 /dev/pve/LV' failed with exit code 5) in which case we might have to use a standart ext3 partition (but unsure if we can do this with the 4 primary partition limitations). Does this makes more or less sense? Would it be mad to for example write VMs /var/logs to a NFS mounted partition (on the host system)? Are their any other easier ways to mount host system partitions (or folders) to the VMs?

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• Apache2 name based virtual host always redirect 301

  - by Francesco

  I've got a server (runnging Debian Squeeze) with Apache 2.2, there are 4 site running there. I'm using namebased virtulhosts because I've got a single IP. Initial configuration has been made with Webmin and probably something has been messed up.. firstdomain.com is my default domain and is working correctly, seconddomain.com is another site that is working. Now I want to add lastdomain.tk as a new site, so I've made this config file: root@webamp:/etc/apache2# cat sites-available/lastdomain.tk.conf <VirtualHost *:80> DocumentRoot /home/server/Condivisione/RAID/lastdomain.tk ServerName www.alazanes.tk ServerAlias alazanes.tk </VirtualHost> I've added it to enabled-sites and restarted apache. The problem is that if I go to lastdomain.tk (or www.lastdomain.tk) I'm redirected to firstdomain.com with a 301 redirect. Both lastdomain.tk and www.lastdomain.tk are A DNS records pointing to my IP address. Strange thing is that if a change DocumentRoot of lastdomain.tk to DocumentRoot /home/server/Condivisione/RAID/Sito_SecondDomain I correctly see seconddomain.com content without being redirected (lastdomain.tk is showed on address bar) These are the other configurations I'm using. root@webamp:/root# source /etc/apache2/envvars ; /usr/sbin/apache2 -S VirtualHost configuration: wildcard NameVirtualHosts and _default_ servers: *:443 webamp.firstdomain.com (/etc/apache2/sites-enabled/ssl.bbteam:1) *:80 is a NameVirtualHost default server firstdomain.com (/etc/apache2/sites-enabled/000-default:7) port 80 namevhost firstdomain.com (/etc/apache2/sites-enabled/000-default:7) port 80 namevhost www.lastdomain.tk (/etc/apache2/sites-enabled/lastdomain.tk.conf:1) ## other domains ## port 80 namevhost seconddomain.com (/etc/apache2/sites-enabled/seconddomain.com.conf:1) Syntax OK Content of default config file is root@webamp:/etc/apache2# cat sites-available/default <VirtualHost *:80> ServerAdmin [email protected] ServerName firstdomain.com ServerAlias www.firstdomain.com direct.firstdomain.com DocumentRoot /home/server/Condivisione/RAID/Sito_Web_Apache_su_80 ErrorLog /var/log/apache2/error.log LogLevel warn CustomLog /var/log/apache2/access.log combined </VirtualHost> content of second domain config file is root@webamp:/etc/apache2# cat sites-available/seconddomain.com.conf <VirtualHost *:80> DocumentRoot /home/server/Condivisione/RAID/Sito_SecondDomain ServerName seconddomain.com ServerAlias www.seconddomain.com direct.seconddomain.com #redirect 301 / http://www.seconddomain.com/ <Directory "/home/server/Condivisione/RAID/Sito_SecondDomain"> allow from all Options +Indexes </Directory> </VirtualHost> Probably a file permission problem? root@webamp:/root# ls -lh /home/server/Condivisione/RAID/ total 7.1M drwxrwxr-x 15 www-data server 4.0K Jun 5 13:29 Sito_SecondDomain drwxrwxrwx 23 server server 4.0K Jun 7 16:22 Sito_Web_Apache_su_80 drwxrwxr-x 17 www-data server 4.0K Jun 8 09:56 alazanes.tk Do someone have an idea of what is happening? Thanks, Francesco

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• ssh tunnel error "ssh_exchange_identification: Connection closed by remote host"

  - by Jacob Ewing

  I'm trying to use an ssh tunnel from my office machine to my home machine, and get an error when I try to use it. What I'm doing is starting one shell like so: ssh -gL 12345:my.home.domain:22 my.home.domain This is giving me a proper shell, no problem. What I normally do then is ssh to my home machine through this office machine, like so: ssh -p 12345 127.0.0.1 This has always worked for me, until last week, when I set up a new system on my home machine (switching from Ubuntu to Debian). Now I get an error. I can still open up my initial ssh connection, but when I try to use that tunnel, I get (on the office machine) this error: ssh_exchange_identification: Connection closed by remote host Also, when that happens, the open shell that I have the tunnelling set up through gets this line spat out at it: channel 3: open failed: connect failed: Connection timed out At which point, I'm at a loss. If any more info is needed, I'll be happy to post it. ============= further to that ============== After fiddling around further, I've found that I'm getting a different response from the server (my home machine that is) when I try to telnet in on the various ports. If I try: telnet my.home.domain 22 I get this back: Trying <my ip address>... Connected to <my domain>. Escape character is '^]'. SSH-2.0-OpenSSH_5.5p1 Debian-6+squeeze2 Which is what I would expect. After setting up the tunnel though, and then telnetting to that, I see this response: Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. ============== and further still ================== As per kbulgrien's suggestion, here is the output from the client machine with the -v option: ssh -vp 24600 127.0.0.1 OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to 127.0.0.1 [127.0.0.1] port 24600. debug1: Connection established. debug1: identity file /home/jacob/.ssh/id_rsa type -1 debug1: identity file /home/jacob/.ssh/id_rsa-cert type -1 debug1: identity file /home/jacob/.ssh/id_dsa type -1 debug1: identity file /home/jacob/.ssh/id_dsa-cert type -1 debug1: identity file /home/jacob/.ssh/id_ecdsa type -1 debug1: identity file /home/jacob/.ssh/id_ecdsa-cert type -1 ssh_exchange_identification: Connection closed by remote host

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• Why can I not get a WDS-originated PXE boot to progress past the first file download?

  - by Jeff Shattock

  I'm trying to work out an automated Windows install process, and thought I'd give WDS a look. After some promising initial progress, I seem to have hit a wall. I imported the boot and install WIMs, and created the capture WIM successfully. However, whenever I try to PXE boot the reference machine against the WDS server, it kinda craps out. It finds the server and downloads WDSNBP.COM successfully, and then gives the message "TFTP download failed." According to WireShark, the only communication between the WDS box and the client box is the successful TFTP request and download of boot\x86\WDSNBP.COM. No further requests are sent. The WDS log on the server shows the same thing, one successful download and no more activity. I've tried every combination of the following, with exactly zero change in behaviour: Win Server 2008R2 vs 2012 vs 2012R2 WDS virtualized on KVM, ESXi, VirtualBox, VMWare Workstation Client virtualized on KVM, ESXi, VirtualBox, VMWare Workstation Every network adaptor type offered by the virtualization platforms. "Actual" network vs isolated, virtual network. MS DHCP server vs Linux isc-dhcp-server Joined to a domain vs Stand-alone I tried changing the boot filename in DHCP to pxeboot.com instead, and it has no problem downloading that file instead, but it then crabs about Boot\BCD being corrupted. Also, with 2012, it doesnt appear that WDSNBP.com does the architecture detection, or at least does'nt report that it did. 2008 reports that it found x64, and then errors. I find myself out of things to check, and I dont see anything immediately wrong. Where do I go from here? WDS server is at 192.168.1.50, DHCP/DNS at 192.168.1.7. Console of the client computer after the boot: MAC: 52:54:00:28:94:0E UUID: blah blah Searching for server (DHCP)..... Me: 192.168.1.155, DHCP: 192.168.1.7, Gateway 192.168.1.1 Loading 192.168.1.50:boot\x86\wdsnbp.com ...(PXE).................done Downloaded WDSNCP... TFPT download failed Interesting parts of /etc/dhcp/dhcpd.conf on the Linux DHCP server: allow booting; allow bootp; option option-60 code 60 = string; option option-66 code 66 = string; option option-67 code 67 = string; subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.110 192.168.1.253; next-server 192.168.1.50; option tftp-server-name "192.168.1.50"; option option-60 "PXEClient"; filename "boot\\x86\\wdsnbp.com"; option bootfile-name "boot\\x86\\wdsnbp.com"; }

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• How to tell if a freebsd jail is up to date?

  - by Martin Torhage

  I've set up a "Service Jail" in FreeBSD 8.0 according to the FreeBSD Handbook (http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails-application.html). After upgrading the host to the latest patch level and then performed a jail-upgrade, freebsd-fetch still reports that there are files in need of an update in the jail. Is this expected? Then how do I know if a jail is up to date? This is what I've done in more detail: After the initial setup of the jail freebsd-update fetch reported that there were no updates available neither in the host system nor in the jail. This was expected. A while later freebsd-update fetch reported that the following files where in need of an update both in the host and in the jail. /usr/lib/libssl.a /usr/lib/libssl_p.a /usr/lib/libzpool.a /usr/lib32/libssl.a /usr/lib32/libssl_p.a /usr/lib32/libzpool.a I updated the host and followed the upgrade guide for the jail (http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails-application.html#JAILS-SERVICE-JAILS-UPGRADING). freebsd-update fetch now reports that there are no updates available in the host but the following is the output from freebsd-update fetch in the jail: [root@bb /]# freebsd-update fetch Looking up update.FreeBSD.org mirrors... 3 mirrors found. Fetching metadata signature for 8.0-RELEASE from update5.FreeBSD.org... done. Fetching metadata index... done. Inspecting system... done. Preparing to download files... done. The following files are affected by updates, but no changes have been downloaded because the files have been modified locally: /var/db/mergemaster.mtree The following files will be updated as part of updating to 8.0-RELEASE-p2: /usr/lib/libssl.a /usr/lib/libssl_p.a /usr/lib/libzpool.a /usr/lib32/libssl.a /usr/lib32/libssl_p.a /usr/lib32/libzpool.a Shouldn't freebsd-update know that the jail is up to date or have I failed upgrading it? How am I supposed to know if a jail is up to date if freebsd-update can't tell? I'm sure I ran make cleandir twice before make buildworld. TIA

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• Supervisor sentry-web exit status 1

  - by rockingskier

  I'm having problems getting Sentry (https://www.getsentry.com - not enough rep for a link) running as a service using supervisor. I can run Sentry in the command line and view it correctly in the browser but when it comes to supervisor I am completely in the dark. I shall try and give all the details I can Initial user warning By no means a server admin, just playing/learning in VirtualBox. Literally only just discovered supervisor from reading the Sentry documentation so I may well be making some obvious mistakes here. The setup: Ubuntu server 11.10 (fresh install, VirtualBox) virtualenv with Sentry and its dependencies. supervisor Instructions followed Supervisor with vanilla ini file Sentry/supervisor instructions My supervisor ini (Sentry section) [program:sentry-web] directory=/root/.virtualenvs/sentry/ command= start http /root/.virtualenvs/sentry/bin/sentry autostart=true autorestart=true redirect_stderr=true OK so here we go: When I run supervisord -n I get the following messages rather than a nice web interface to play with. 2012-04-12 23:48:09,024 CRIT Supervisor running as root (no user in config file) 2012-04-12 23:48:09,097 INFO RPC interface 'supervisor' initialized 2012-04-12 23:48:09,099 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2012-04-12 23:48:09,100 INFO supervisord started with pid 17813 2012-04-12 23:48:10,126 INFO spawned: 'sentry-web' with pid 17816 2012-04-12 23:48:10,169 INFO exited: sentry-web (exit status 1; not expected) 2012-04-12 23:48:11,199 INFO spawned: 'sentry-web' with pid 17817 2012-04-12 23:48:11,238 INFO exited: sentry-web (exit status 1; not expected) 2012-04-12 23:48:13,269 INFO spawned: 'sentry-web' with pid 17818 2012-04-12 23:48:13,309 INFO exited: sentry-web (exit status 1; not expected) 2012-04-12 23:48:16,343 INFO spawned: 'sentry-web' with pid 17819 2012-04-12 23:48:16,389 INFO exited: sentry-web (exit status 1; not expected) 2012-04-12 23:48:17,394 INFO gave up: sentry-web entered FATAL state, too many start retries too quickly CRIT Supervisor running as root (no user in config file) suggests a big problem, probably shouldn't be running this as root? CRIT Server 'unix_http_server' running without any HTTP authentication checking Surely authentication is optional? INFO exited: sentry-web (exit status 1; not expected) *sad face* here. Google hasn't been much help yet. Anyway, that is it as far as I know. If anyone can help me that would be greatly appreciated. Thanks in advance.

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• Can't ssh tunnel to access a remote mysql server

  - by hobbes3

  I can't seem to figure out why I can't use ssh tunnel to connect to my remote MySQL server. I do ssh tunnel with [hobbes3@hobbes3] ~ $ ssh linode -L 3307:localhost:3306 Then on another terminal, I try [hobbes3@hobbes3] ~ $ mysql -h localhost -P 3307 -u root --protocol=tcp -p Enter password: ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 2 On the server, it shows this: root@li534-120 ~ # channel 4: open failed: connect failed: Connection refused Here is my my.cnf on the server: [mysqld] # Settings user and group are ignored when systemd is used (fedora >= 15). # If you need to run mysqld under different user or group, # customize your systemd unit file for mysqld according to the # instructions in http://fedoraproject.org/wiki/Systemd user=mysql datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Semisynchronous Replication # http://dev.mysql.com/doc/refman/5.5/en/replication-semisync.html # uncomment next line on MASTER ;plugin-load=rpl_semi_sync_master=semisync_master.so # uncomment next line on SLAVE ;plugin-load=rpl_semi_sync_slave=semisync_slave.so # Others options for Semisynchronous Replication ;rpl_semi_sync_master_enabled=1 ;rpl_semi_sync_master_timeout=10 ;rpl_semi_sync_slave_enabled=1 # http://dev.mysql.com/doc/refman/5.5/en/performance-schema.html ;performance_schema [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid [mysqld] port = 3306 socket=/var/lib/mysql/mysql.sock skip-external-locking key_buffer_size = 64M max_allowed_packet = 128M sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M thread_cache = 8 max_connections = 25 query_cache_size = 16M table_open_cache = 1024 table_definition_cache = 1024 tmp_table_size = 32M max_heap_table_size = 32M bind-address = 0.0.0.0 Now sure if this helps but here is the MySQL user list: mysql> select * from mysql.user; +-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+------------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+--------+-----------------------+ | Host | User | Password | Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv | Drop_priv | Reload_priv | Shutdown_priv | Process_priv | File_priv | Grant_priv | References_priv | Index_priv | Alter_priv | Show_db_priv | Super_priv | Create_tmp_table_priv | Lock_tables_priv | Execute_priv | Repl_slave_priv | Repl_client_priv | Create_view_priv | Show_view_priv | Create_routine_priv | Alter_routine_priv | Create_user_priv | Event_priv | Trigger_priv | Create_tablespace_priv | ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions | max_updates | max_connections | max_user_connections | plugin | authentication_string | +-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+------------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+--------+-----------------------+ | localhost | root | *664328D3C5E263F4FB25185681AAE7E92B01B2B0 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | | | | | 0 | 0 | 0 | 0 | | | | 127.0.0.1 | root | *664328D3C5E263F4FB25185681AAE7E92B01B2B0 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | | | | | 0 | 0 | 0 | 0 | | | | ::1 | root | *664328D3C5E263F4FB25185681AAE7E92B01B2B0 | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | | | | | 0 | 0 | 0 | 0 | | | +-----------+------+-------------------------------------------+-------------+-------------+-------------+-------------+-------------+-----------+-------------+---------------+--------------+-----------+------------+-----------------+------------+------------+--------------+------------+-----------------------+------------------+--------------+-----------------+------------------+------------------+----------------+---------------------+--------------------+------------------+------------+--------------+------------------------+----------+------------+-------------+--------------+---------------+-------------+-----------------+----------------------+--------+-----------------------+ 3 rows in set (0.00 sec) I read about how MySQL treats localhost vs 127.0.0.1 as connecting via a socket or TCP, respectively. But I'm starting to get confused on what's really going on or if socket vs TCP is even the issue. Thanks in advance and I'm open for any tips and suggestions! Some more info: My MySQL client, running OS X 10.8.4, is mysql Ver 14.14 Distrib 5.6.10, for osx10.8 (x86_64) using EditLine wrapper My MySQL server, running on CentOS 6.4 32-bit, is mysql> SHOW VARIABLES LIKE "%version%"; +-------------------------+--------------------------------------+ | Variable_name | Value | +-------------------------+--------------------------------------+ | innodb_version | 1.1.8 | | protocol_version | 10 | | slave_type_conversions | | | version | 5.5.28 | | version_comment | MySQL Community Server (GPL) by Remi | | version_compile_machine | i686 | | version_compile_os | Linux | +-------------------------+--------------------------------------+ 7 rows in set (0.00 sec)

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• Ububtu server 12.04 auto installation freezes at kickseeding running if ks.cfg has post scripts

  - by john206

  I'm trying to make a custom Ubuntu Server iso file. Kickstart file (ks.cfg) runs smooth when there is no %post in the file and Ubuntu installs correctly with ks configuration. Installation finishes installing base, apt, grub and It echos: Kickseed Running... and it freezes @ 0% I thought may be apt-get update doesnt work in ks file, I tried to install other apps like apache2 but no luck I have created dozen iso images and installed them in Virtual Box.I have been googling for 3 days and checked out ubuntu forums but haven't figured out the issue. I appreciate your help. This is how I made the iso image. My ks.file and txt.cfg files located in isolinux directory: root@ubuntu:/home/work mount -o loop ubuntu-12.04-amd64.iso original-iso/ rsync -a original-iso/ custom-iso/ cp ks.cfg custom-iso/isolinux/ cp txt.cfg custom-iso/isolinux/ chmod -R 777 custom-iso/ #Creating Iso image mkisofs -D -r -V “$IMAGE_NAME” -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ~/ubuntu-12.04-alternate-custom-amd64.iso custom-iso/ ks.cfg #Generated by Kickstart Configurator #platform=AMD64 or Intel EM64T #System language lang en_US #Language modules to install langsupport en_US #System keyboard keyboard us #System mouse mouse #System timezone timezone America/Los_Angeles #Root password rootpw --iscrypted somethingsomething #Initial user user ubuntu --fullname "ubuntu" --iscrypted --password somethingsomething. #Reboot after installation reboot #Use text mode install text #Install OS instead of upgrade install #Use CDROM installation media cdrom #System bootloader configuration bootloader --location=mbr #Clear the Master Boot Record zerombr yes #Partition clearing information clearpart --all --initlabel #Disk partitioning information part /boot --size 128 --fstype=ext3 --asprimary part / --size 512 --fstype=ext3 --asprimary part swap --size 512 part /tmp --size 512 --fstype=ext3 part /var --size 512 --fstype=ext3 part /usr --size 4096 --fstype=ext3 part /home --size 2048 --fstype=ext3 #System authorization infomation auth --useshadow --enablemd5 #Network information network --bootproto=dhcp --device=eth0 #Firewall configuration firewall --disabled --http --ftp --ssh #X Window System configuration information xconfig --depth=32 --resolution=1024x768 --defaultdesktop=GNOME %post apt-get update mkdir /home/user txt.cfg default autoinstall label autoinstall menu label ^Install Custom Ubuntu Server kernel /install/vmlinuz append file=/cdrom/preseed/ubuntu-server.seed initrd=/install/initrd.gz quiet ks=cdrom:/isolinux/ks.cfg -- label install menu label ^Install Ubuntu Server kernel /install/vmlinuz append file=/cdrom/preseed/ubuntu-server.seed vga=788 initrd=/install/initrd.gz quiet -- label cloud menu label ^Multiple server install with MAAS kernel /install/vmlinuz append modules=maas-enlist-udeb vga=788 initrd=/install/initrd.gz quiet -- label check menu label ^Check disc for defects kernel /install/vmlinuz append MENU=/bin/cdrom-checker-menu vga=788 initrd=/install/initrd.gz quiet -- label memtest menu label Test ^memory kernel /install/mt86plus label hd menu label ^Boot from first hard disk localboot 0x80

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