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Articles indexed Friday September 7 2012

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• MYSQL: How to limit inner join?

  - by Sergii Rechmp

  I need some help with my query. I have 2 tables: all: art|serie sootv: name|art|foo I need to get result like name|serie. My query is: SELECT t2.NAME, t1.serie FROM ( SELECT * FROM `all` WHERE `serie` LIKE '$serie' ) t1 INNER JOIN sootv t2 ON t1.art = t2.art; it works, but sootv table contains data like name|art|foo abc | 1 | 5 abc | 1 | 6 i get 2 same results. Its not what i need. Help me please - how i can get only one result: abc|1 Thanks.

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• Passing const CName as this argument discards qualifiers

  - by Geno Diaz

  I'm having trouble with passing a constant class through a function. // test the constructors auto CName nameOne("Robert", "Bresson"); const CName nameTwo = nameOne; auto CName nameThree; // display the contents of each newly-constructed object... // should see "Robert Bresson" cout << "nameOne = "; nameOne.WriteFullName(); cout << endl; // should see "Robert Bresson" again cout << "nameTwo = "; nameTwo.WriteFullName(); cout << endl; As soon as the compiler hits nameTwo.WriteFullName() I get the error of abandoning qualifiers. I know that the class is a constant however I can't figure out how to work around it. The function is in a header file written as so: void const WriteFullName(ostream& outstream = cout) { outstream << m_first << ' ' << m_last; } I receive this error when const is put in back of the function header main.cpp:(.text+0x51): undefined reference to CName::CName()' main.cpp:(.text+0x7c): undefined reference toCName::WriteFullName(std::basic_ostream &) const' main.cpp:(.text+0xbb): undefined reference to CName::WriteFullName(std::basic_ostream<char, std::char_traits<char> >&) const' main.cpp:(.text+0xf7): undefined reference toCName::WriteFullName(std::basic_ostream &) const' main.cpp:(.text+0x133): undefined reference to operator>>(std::basic_istream<char, std::char_traits<char> >&, CName&)' main.cpp:(.text+0x157): undefined reference tooperator<<(std::basic_ostream &, CName const&)' main.cpp:(.text+0x1f4): undefined reference to operator<<(std::basic_ostream<char, std::char_traits<char> >&, CName const&)' main.cpp:(.text+0x22b): undefined reference tooperator<<(std::basic_ostream &, CName const&)' main.cpp:(.text+0x25f): undefined reference to operator<<(std::basic_ostream<char, std::char_traits<char> >&, CName const&)' main.cpp:(.text+0x320): undefined reference tooperator<<(std::basic_ostream &, CName const&)' main.cpp:(.text+0x347): undefined reference to `operator(std::basic_istream &, CName&)'

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• Grouping data into ranges in R

  - by Maddy

  supposing i have a data frame in R that has names of students in one column and their marks in another column. these marks range from 20 to 100. > mydata id name marks gender 1 a1 56 female 2 a2 37 male i want to divide the student into groups, based on the criteria of obtained marks, so that difference between marks in each group should be more than 10. i tried to use the function table, which gives the number of students in each range from say 20-30, 30-40, but i want it to pick those students that have marks in a given range and put all their information together in a group. any help is appreciated.

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• how to avoid clutch billiard balls?

  - by Nait87

  I'm working on the simple behaviour of billiard balls in a collision with each other. All works normal, but there was a problem when facing a few easy balls is the effect of coupling balls and they're cool with each other. Tell me how to prevent this. bool MGBilliard::CollisingBall(CCPoint curr_point, CCPoint next_point) { float dx = next_point.x - (curr_point.x + dvdt.x); float dy = next_point.y - (curr_point.y - dvdt.y); float d = dx*dx+dy*dy; return d <= BALL_RADIUS * BALL_RADIUS; } double MGBilliard::angleCollisionBalls(Ball* current, Ball* next) { double na; double dx = fabs(next->location.x - current->location.x); double dy = fabs(next->location.y - current->location.y); na = atan(fabs(dy/dx)); if(atan(fabs(current->location.y/current->location.x)) < atan(fabs(next->location.y/next->location.x))) na = current->angle - na; else if(atan(fabs(current->location.y/current->location.x)) > atan(fabs(next->location.y/next->location.x))) na = current->angle + na; return na; } for(unsigned int i = 0;i<BALL_COUNT;++i) { if(vBalls[i]->speed > 0){ vBalls[i]->speed += vBalls[i]->acceleration; float dsdt = vBalls[i]->speed*dt; dvdt.x = dsdt*cos(vBalls[i]->angle); dvdt.y = dsdt*sin(vBalls[i]->angle); vBalls[i]->location.x += dvdt.x; vBalls[i]->location.y += dvdt.y; for(unsigned int j = 1; j < BALL_COUNT; ++j) { if(i == j) continue; if(CollisingBall(vBalls[i]->spriteBall->getPosition(),vBalls[j]->spriteBall->getPosition())) { vBalls[j]->speed = 600; double angle; angle = angleCollisionBalls(vBalls[i],vBalls[j]); vBalls[i]->angle = (float)-angle; vBalls[j]->angle = (float)angle; } } } }

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• String array definition in JAVA

  - by Mohamed KALLEL

  Is it possible to define array in this way in JAVA, otherwise are there an alternative close this definition? private final int CONST_0= 0; private final int CONST_1= 1; private final int CONST_2= 2; private final int CONST_3= 3; private final String[] CONST_TXTRECORDS = new String[] {[CONST_0] = "test0", {[CONST_1] = "test1", {[CONST_2] = "test2", {[CONST_3] = "test3"};

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• Javascipt Regular Expression

  - by Ghoul Fool

  Having problems with regular expressions in JavaScript. I've got a number of strings that need delimiting by commas. Unfortunately the sub strings don't have quotes around them which would make life easier. var str1 = "Three Blind Mice 13 Agents of Cheese Super 18" var str2 = "An Old Woman Who Lived in a Shoe 7 Pixies None 12" var str3 = "The Cow Jumped Over The Moon 21 Crazy Cow Tales Wonderful 9" They are in the form of PHRASE1 (Mixed type with spaces") INTEGER1 (1 or two digit) PHRASE2 (Mixed type with spaces") WORD1 (single word mixed type, no spaces) INTEGER2 (1 or two digit) so I should get: result1 = "Three Blind Mice, 13, Agents of Cheese, Super, 18" result2 = "An Old Woman Who Lived in a Shoe, 7, Pixies, None, 12" result3 = "A Cow Jumped Over The Moon, 21, Crazy Cow Tales, Wonderful, 9" I've looked at txt2re.com, but can't quite get what I need and ended up delimiting by hand. But I'm sure it can be done, albeit someone with a bigger brain. There are lots of examples of regEx but I couldn't find any to deal with phrases; so I was wondering if anyone could help me out. Thank you.

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• Why do i get exc bad access in cases when object is not nil?

  - by DixieFlatline

  I have an app that receives remote notifications. My view controller that is shown after push has a tableview. App crashes very randomly (1 in 20 tries) at line setting frame: if (!myTableView) { NSLog(@"self.myTableView is nil"); } myTableView.frame=CGRectMake(0, 70, 320, 376); This only happens when i open the app, then open some other apps and then receive the push notification. I guess it has something to do with memory. I use ARC (ios 5). The strange thing is that nslog is not displayed, so tableview is not nil. Crash log: Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x522d580c Crashed Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libobjc.A.dylib 0x352b1f7e objc_msgSend + 22 1 Foundation 0x37dc174c NSKVOPendingNotificationCreate + 216 2 Foundation 0x37dc1652 NSKeyValuePushPendingNotificationPerThread + 62 3 Foundation 0x37db3744 NSKeyValueWillChange + 408 4 Foundation 0x37d8a848 -[NSObject(NSKeyValueObserverNotification) willChangeValueForKey:] + 176 5 Foundation 0x37e0ca14 _NSSetPointValueAndNotify + 76 6 UIKit 0x312af25a -[UIScrollView(Static) _adjustContentOffsetIfNecessary] + 1890 7 UIKit 0x312cca54 -[UIScrollView setFrame:] + 548 8 UIKit 0x312cc802 -[UITableView setFrame:] + 182 9 POViO 0x000913cc -[FeedVC viewWillAppear:] (FeedVC.m:303) Dealloc is not called because it is not logged: - (void)dealloc { NSLog(@"dealloc"); }

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• JAVA Casting error

  - by user1612725

  Im creating a program that uses Dijksrtras algorithm, im using nodes that represent cities on an imported map, and you can create edges between two cities on the map. My problem is every edge has a "weight" where it will represent distance in minutes and i have a function where i want to see the distance between the two edges. But i keep getting the error "Cannot cast from Stad to Edge" at the line Edge<Stad> selectedEdge = (Edge) fvf.visaFörbLista.getSelectedValue(); where "Stad" represents the city and "Edge" an edge. FormVisaförbindelse fvf = new FormVisaförbindelse(); for(;;){ try{ int svar = showConfirmDialog(null, fvf, "Ändra Förbindelser", JOptionPane.OK_CANCEL_OPTION); if (svar != YES_OPTION) return; if (fvf.visaFörbLista.isSelectionEmpty() == true){ showMessageDialog(mainMethod.this, "En Förbindelse måste valjas.","Fel!", ERROR_MESSAGE); return; } Edge<Stad> selectedEdge = (Edge) fvf.visaFörbLista.getSelectedValue(); FormÄndraförbindelse faf = new FormÄndraförbindelse(); faf.setförbNamn(selectedEdge.getNamn()); for(;;){ try{ int svar2 = showConfirmDialog(mainMethod.this, faf, "Ändra Förbindelse", OK_CANCEL_OPTION); if (svar2 != YES_OPTION) return; selectedEdge.setVikt(faf.getförbTid()); List<Edge<Stad>> edges = lg.getEdgesBetween(sB, sA); for (Edge<Stad> edge : edges){ if (edge.getNamn()==selectedEdge.getNamn()){ edge.setVikt(faf.getförbTid()); } } return; } catch(NumberFormatException e){ showMessageDialog(mainMethod.this, "Ogiltig inmatning.","Fel!", ERROR_MESSAGE); }

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• Find which alias method is called in rails model

  - by Kashif Umair Liaqat

  I am new to rails development. I have created some aliases to a method and I want to know that which alias is called. I have this code. alias_method :net_stock_quantity_equals :net_stock_quantity alias_method :net_stock_quantity_gte :net_stock_quantity alias_method :net_stock_quantity_lte :net_stock_quantity alias_method :net_stock_quantity_gt :net_stock_quantity alias_method :net_stock_quantity_lt :net_stock_quantity def net_stock_quantity #some code here end I want to know that user has called which alias. Like if user calls net_stock_quantity_equals then I should know that the user has called net_stock_quantity_equals not net_stock_quantity. Any help would be appreciated.

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• Ensure that my C# desktop application is making requests to my ASP .NET MVC action?

  - by Mathias Lykkegaard Lorenzen

  I've seen questions that are almost identical to this one, except minor but important differences that I would like to get detailed. Let's say that I have a controller and an action method in MVC which therefore accepts requests on the following URL: http://example.com/api/myapimethod?data=some-data-here. This URL is then being called regularly by 1000 clients or more spread out in the public. The reason for this is crowdsourcing. The clients around the globe help feed a global cache on my server, which makes it faster for the rest of the clients to fetch the data. Now, if I'm sneaky (and I am), I can go into Fiddler, Ethereal, Wireshark or any other packet sniffing tool and figure out which requests the program is making. By figuring that out, I can also replicate them, and fill the service with false corrupted data. What is the best approach to ensuring that the data received in my ASP .NET MVC action method is actually from the desktop client application, and not some falsely generated data that the user invented? Since it is all based on crowdsourcing, would it be a good idea for my users to be able to "vote" if some data is falsified, and then let an automatic cleanup commence if there are enough votes? I do not have access to a tool like SmartAssembly, so unfortunately my .NET program is fully decompilable. I realize this might be impossible to accomplish in an error-proof manner, but I would like to know where my best chances are.

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• Export Certificate Windows Server 2008

  - by user1432032

  I need to export the private key of a self-created SSL-certificate on a Windows Server 2008. However at Microsoft Management Console (the certificate is located, if it matter, in Personal-Certificate folder) the option "Yes, export the private key" is greyed out. Reading the provided help section it tells that the certificate needed to "be made exportable" during creation. However it also says that it is ONLY a limitation if it was created using Windows Server 2003. It doesn´t say anything how to fix it though on a Windows 2008 Server. The certificate is self-signed. I want to export to PKCS12 format. I´m accessing MMC as administrator so there should not be any permission issues. How can I make this certificate "exportable"?

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• Actionbar scherlock is not refreshed when the orientation is changed

  - by SavasCinar

  I use Sherlock action bar in my application. I used "ifRoom|withText" feature in my menu. If I test my code in portrait mode, I can see only icon and if I rotate orientation to landscape, still I see only icon. On the other hand, if I run with landscape, I can see text and icon on portrait and landscape. This means that When the screen is rotated, action bar is not refreshed. How can I fix? In menu, I have android:showAsAction="ifRoom|withText" Also I used this line in my manifest file to fixed android:configChanges="keyboardHidden|orientation|screenSize" but it didn't work. And I run my code android 2.3 Also I used fragment in my activity, FragmentManager fm = getSupportFragmentManager(); ft = fm.beginTransaction(); mFragment1 = fm.findFragmentByTag("f1"); if (mFragment1 == null) { mFragment1 = new MenuFragment(); ft.add(mFragment1, "f1"); } ft.commit();

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• Android RealViewSwitcher : How to start on second page?

  - by DarcCode

  i'm using RealViewSwitcher I got from this site. It works perfectly on my code, but I don't have any idea how to set the initial current screen to second or third screen. the method setCurrentScreen(int) doesn't affect anything and if I change the for loop inside the onLayout() method from for (int i = 0; i < count; i++) {...} into for (int i = 1; i < count; i++){...} It does starts in page two, but you can't go to page one. Any idea how to start on page two?

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• Enterprise Wireless Authentication without Active Directory

  - by ank

  We are in the process of redoing our wireless access network and would like to know if there is any method to get Windows clients/users access to the network using 802.1x WITHOUT having an Active Directory server for authentication and WITHOUT installing additional software on each and every client. Note that we already use Radius servers, LDAP servers (all on CentOS). Users employ a variety of clients including Windows, Mac, Linux, Android, iOS.

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• Adding file to /etc/cron.d doesn't make it run (ubuntu 10.04)

  - by tom

  If I scp a cron file into /etc/cron.d it doesn't run unless I edit the file and change the command. Then crond seems to pick up the cron file. How can I make cron reload its cron files in ubuntu 10.04? 'touch'ing the file doesn't work nor does 'restart cron' or 'reload cron'. My cron file is set to run every minute and logs to a file. Nothing ends up in the log file until I edit the command, and there's no entry for it in /var/log/syslog I'm stumped. Here's my cron file saved to /etc/cron.d/runscript # Runs the script every minute. This is safe because it will exit with success if it's already running * * * * * www-data if [ -f /usr/local/bin/thing ]; then exec /usr/bin/php /usr/local/bin/thing mode:prod -a 14 -d >> /var/log/thing/mything.log 2>&1; else echo `date +'[%D %T]'` "Thing not deployed. Command not run\n" >> /var/log/thing/mything.log; fi &

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• Rails, Capistrano, Nginx, Unicorn - Application has been already initialized (RuntimeError)

  - by Andy Copley

  Can anyone shed some light on what exactly this error refers to? I'm having trouble deploying new versions of the site. I, INFO -- : reloading config_file=[snip]/current/config/unicorn.rb I, INFO -- : Refreshing Gem list E, ERROR -- : error reloading config_file=[snip]/current/config/unicorn.rb: Application has been already initialized. (RuntimeError) E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/railties-3.2.3/lib/rails/application.rb:135:in `initialize!' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing' E, ERROR -- : [snip]/releases/20120907085937/config/environment.rb:5:in `<top (required)>' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in require' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_dependency' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' E, ERROR -- : config.ru:4:in `block in <main>' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' E, ERROR -- : config.ru:1:in `new' E, ERROR -- : config.ru:1:in `<main>' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/lib/unicorn.rb:44:in `eval' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/lib/unicorn.rb:44:in `block in builder' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/lib/unicorn/http_server.rb:696:in `call' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/lib/unicorn/http_server.rb:696:in `build_app!' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/lib/unicorn/http_server.rb:677:in `load_config!' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/lib/unicorn/http_server.rb:303:in `join' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/gems/unicorn-4.3.1/bin/unicorn:121:in `<top (required)>' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/bin/unicorn:23:in `load' E, ERROR -- : [snip]/shared/bundle/ruby/1.9.1/bin/unicorn:23:in `<main>' I, INFO -- : reaped #<Process::Status: pid 3182 exit 0> worker=0 I, INFO -- : reaped #<Process::Status: pid 3185 exit 0> worker=1 I, INFO -- : reaped #<Process::Status: pid 3188 exit 0> worker=2 I, INFO -- : reaped #<Process::Status: pid 3191 exit 0> worker=3 I, INFO -- : worker=0 ready I, INFO -- : worker=3 ready I, INFO -- : worker=1 ready I, INFO -- : worker=2 ready Unicorn.rb root = "/home/[user]/apps/[site]/current" working_directory root pid "#{root}/tmp/pids/unicorn.pid" stderr_path "#{root}/log/unicorn.log" stdout_path "#{root}/log/unicorn.log" listen "/tmp/unicorn.[site].sock", :backlog => 2048 worker_processes 4 preload_app true timeout 30 before_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect! end after_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection end Any help appreciated - I can pull more config files if required.

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• How to goup EC2 instances in order to delegate administrations to differents teams?

  - by Olivier

  Is it possible (using ARN) to make severals groups of instances. Then using differents policy to grant some access to a group of instance only and not the other instances? For example : { "Statement": [ { "Action": "ec2:*", "Effect": "Allow", "Resource": "*" }, { "Effect": "Allow", "Action": "elasticloadbalancing:*", "Resource": "*" }, { "Effect": "Allow", "Action": "cloudwatch:*", "Resource": "*" }, { "Effect": "Allow", "Action": "autoscaling:*", "Resource": "*" } ] } Instead of "*" could we use a group or something like that? like a specific subnet? a Tag? or whatever... Thanks for your help

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• Using dd command and running out of space while cloning drive to img

  - by Alan Kuras

  I have a problem with drive cloning. Im using dd on damaged disk with bad sectors trying to make an image from it. Im booting computer with Live Linux CD . Damaged disk: sda 146GB (NTFS) External drive: sdb 300GB (NTFS) After running the command below im running out of space on disk sdb. dd if=/dev/sda of=/dev/sdb/hdd.img bs=4096 conv=noerror,sync The question is why im running out of space on disk sdb ?

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• Bootable and remote controllable imaging software?

  - by stefan.at.wpf

  I am looking for an imaging software, that one can boot from CD or usb stick (therefore without installing anything on the system!) and then control by some kind of remote desktop. So something like a combination of Acronis TrueImage's Bootable Media and Windows Remote Desktop. I don't even need to be able to store the backup on a network drive, as an external usb hdd is attached for these purposes. Background: A system that is normally controlled by SSH / command line and therefore has no keyboard/mouse connected that I could use to control Acronis TrueImage.

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• 404 with serving static files in a custom nginx configuration

  - by code90

  In my nginx configuration, I have the following: location /admin/ { alias /usr/share/php/wtlib_4/apps/admin/; location ~* .*\.php$ { try_files $uri $uri/ @php_admin; } location ~* \.(js|css|png|jpg|jpeg|gif|ico|pdf|zip|rar|air)$ { expires 7d; access_log off; } } location ~ ^/admin/modules/([^/]+)(.*\.(html|js|json|css|png|jpg|jpeg|gif|ico|pdf|zip|rar|air))$ { alias /usr/share/php/wtlib_4/modules/$1/admin/$2; } location ~ ^/admin/modules/([^/]+)(.*)$ { try_files $uri @php_admin_modules; } location @php_admin { if ($fastcgi_script_name ~ /admin(/.*\.php)$) { set $valid_fastcgi_script_name $1; } fastcgi_pass $byr_pass; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /usr/share/php/wtlib_4/apps/admin$valid_fastcgi_script_name; fastcgi_param REDIRECT_STATUS 200; include /etc/nginx/fastcgi_params; } location @php_admin_modules { if ($fastcgi_script_name ~ /admin/modules/([^/]+)(.*)$) { set $byr_module $1; set $byr_rest $2; } fastcgi_pass $byr_pass; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /usr/share/php/wtlib_4/modules/$byr_module/admin$byr_rest; fastcgi_param REDIRECT_STATUS 200; include /etc/nginx/fastcgi_params; } Following is the requested url which ends up with "404": http://www.{domainname}.com/admin/modules/cms/styles/cms.css Following is the error log: [error] 19551#0: *28 open() "/usr/share/php/wtlib_4/apps/admin/modules/cms/styles/cms.css" failed (2: No such file or directory), client: xxx.xxx.xxx.xxx, server: {domainname}.com, request: "GET /admin/modules/cms/styles/cms.css HTTP/1.1", host: "www.{domainname}.com" Following urls works fine: http://www.{domainname}.com/admin/modules/store/?a=manage http://www.{domainname}.com/admin/modules/cms/?a=cms.load Can anyone see what the problem could be? Thanks. PS. I am trying to migrate existing sites from apache to nginx.

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• Server 2008 R2 - Cannot add HP UPD PCL 6 - Failed with error 0x000000002

  - by Rasmus

  I am having a problem with adding a print driver to one of our 2008 R2 RDS servers. On all other RDS servers in the farm there is no problem. The print server is 2008 R2. The HP Universal Print Driver PCL 6 is installed on the print server. When trying to add a printer with the driver on the failing RDS server i just get the error "Cannnot connect to the printer. Failed with errorcode 0x00000002" I have tried to add the driver to the RDS server localy but it fails with the same error. The driver has been installed before and is currently visible in the printmanagement.msc. When trying to remove the print driver i am unable to do it because it's "Currently in use" What to do? Have tried everyting - i think :-) Thanks. /Rasmus

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• Control scheduled tasks execution

  - by SJuan76

  We are a small shop. I am mainly a programmer, but due to being the only one that risks to manage our servers, the task has fallen on me (yet I it is still a secondary function so I cannot give it too much time). Over the course of years we have needed to create a decent number of .bat scripts that run as scheduled tasks in our servers (dump DB servers, SVN servers, copy files, etc.). Manually checking that everyone has proceeded ok is a time consuming task. I could get them to send an email on completion, but then I would get swarmed by lots of emails each morning. If I setup them to only e-mail on failure, I might miss the instances where the error causes the task to abort (or even not to start). Are there other alternatives? We are currently using Windows 2003 R2, but we are thinking of adding some Linux server soon, so a cross-platform solution would be best.

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• locally logged on a domain joined Win 7 = no authentication prompt so no printing

  - by lyngsie

  We have problems with Win 7 PC's when the user only log on locally on (a domain joined) PC, but still use the Windows printserver. Installed printers suddently stop working and seem to appear offline. In Windows XP the (logged on locally) user would be prompted to autheticate to the domain when printing, but in Windows 7 this feature seem to be faulty or not implemented. I assume the problem is a timeout on the Kerberos ticket. Of course the user has to authenticate to install the printer from the printserver, and that works fine, but in time the authenticaton stops, and no prompt appear. Any suggestions how we can "force" a prompt to authenticate like it happened in XP?

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• My VPS ubuntu server is very slow

  - by askmike

  I just installed a frech copy of Ubuntu 12.04 on my vps because my old installation was very slow, unfortunately this did not fix the problem. With slow I mean requests for my PHP websites take a long time, very slow (30 sec per request) to slow (3+ sec per request). When it's really bad SSH is also laggish. The websites are: askmike.org (pretty standard Wordpress) mvr.me (own PHP) slow? very slow: Here is a picture of loading a clean install of wordpress slow: here is a picture of loading a small PHP based website the vps The VPS has 256mb ram and an 25GB hdd. Besides serving the 2 small websites it isn't doing anything AFAIK. What have I installed Clean Ubuntu server 12.04 LAMP stack few things like git and nodejs (not using both) ossec (because I thought my server was getting hammered) munin What I already tried / done I installed munin so that I could watch io speed and such. The problem is that I don't know where to look for in the munin report. I checked logs and don't see anything strange (although I don't really know where to look for besides strange / repetitive errors and GET requests). I configured Apache MPM to: <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 40 MaxRequestsPerChild 0 </IfModule> (apache is using prefork, the default) Stats I copied the munin report as it appeared at 4:50 last night to a site hosted on a shared webhost. Note that tonight my mysql crashed somewhere after 1:00 (which is a new problem altogether), so therefor the graph for last night might look strange. Can anyone help me get my VPS up to normal speed? EDIT: Thanks for the replies. The VPS is 10 bucks a month and is from directvps.nl (Dutch host and I'm also dutch). I did two speed tests for disk IO: $ dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync 1073741824 bytes (1.1 GB) copied, 23.1506 s, 46.4 MB/s $ dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync 1073741824 bytes (1.1 GB) copied, 39.3796 s, 27.3 MB/s Anyway: how can I prove to my VPS host that it is to slow? I can understand a server being busy slowing a website down. But 5-30 sec loadtime for a normal PHP webpage?

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• How to get a list of Dovecot IMAP users

  - by Colt McCormack

  How do you get a list of users for a dovecot email server that connect via IMAP (as opposed to POP)? Our server is setup to authenticate via LDAP/PAM. Is there an easy way to get a list of the users who are accessing their mail via IMAP, rather than POP? I am about to migrate our server to Google Apps and want to migrate all of the mail for my IMAP users only (couple hundred out of several hundred total users). POP mail will be migrated separately from the client end obviously. I would much rather migrate only the IMAP users rather than the whole domain which would include migrating a bunch of POP mail left in the server that has already been read/sorted/deleted in the client's email program. Migrating all of that extra useless leftover POP mail could waste weeks of migration time. I suppose parsing some logs to see who has connected on an IMAP port (995 or 993) would give me a list would work if someone could help me do that. I know I have the raw dovecot logs, but am hoping for a cleaner solution.

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