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• Problem with running open office from the command line

  - by Devin Dixon

  Yesterday I installed OpenOffice on my Linux server. But when I go to run it through the command line, it says command cannot be found. I've also tried other things like OOWriter, etc. Has anyone had this problem? Installation process went like below: root@aserver [OOO330_m20_native_packed-1_en-US.9567/RPMS]# rpm -i *.rpm package openoffice.org-ure-1.7.0-9567.i586 is already installed package ooobasis3.3-core01-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-3.3.0-9567.i586 is already installed package ooobasis3.3-core02-3.3.0-9567.i586 is already installed package ooobasis3.3-core03-3.3.0-9567.i586 is already installed package ooobasis3.3-core04-3.3.0-9567.i586 is already installed package ooobasis3.3-core05-3.3.0-9567.i586 is already installed package ooobasis3.3-core06-3.3.0-9567.i586 is already installed package ooobasis3.3-core07-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-base-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-calc-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-draw-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-help-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-impress-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-math-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-res-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-writer-3.3.0-9567.i586 is already installed package ooobasis3.3-base-3.3.0-9567.i586 is already installed package ooobasis3.3-calc-3.3.0-9567.i586 is already installed package ooobasis3.3-draw-3.3.0-9567.i586 is already installed package ooobasis3.3-images-3.3.0-9567.i586 is already installed package openoffice.org3-3.3.0-9567.i586 is already installed package ooobasis3.3-impress-3.3.0-9567.i586 is already installed package ooobasis3.3-math-3.3.0-9567.i586 is already installed package ooobasis3.3-writer-3.3.0-9567.i586 is already installed package jre-1.6.0_22-fcs.i586 is already installed package ooobasis3.3-binfilter-3.3.0-9567.i586 is already installed package ooobasis3.3-en-US-binfilter-3.3.0-9567.i586 is already installed package ooobasis3.3-gnome-integration-3.3.0-9567.i586 is already installed package ooobasis3.3-graphicfilter-3.3.0-9567.i586 is already installed package ooobasis3.3-javafilter-3.3.0-9567.i586 is already installed package ooobasis3.3-kde-integration-3.3.0-9567.i586 is already installed package ooobasis3.3-onlineupdate-3.3.0-9567.i586 is already installed package ooobasis3.3-ooofonts-3.3.0-9567.i586 is already installed package ooobasis3.3-oooimprovement-3.3.0-9567.i586 is already installed package ooobasis3.3-ooolinguistic-3.3.0-9567.i586 is already installed package ooobasis3.3-pyuno-3.3.0-9567.i586 is already installed package ooobasis3.3-testtool-3.3.0-9567.i586 is already installed package ooobasis3.3-xsltfilter-3.3.0-9567.i586 is already installed package openoffice.org3-base-3.3.0-9567.i586 is already installed package openoffice.org3-calc-3.3.0-9567.i586 is already installed package openoffice.org3-dict-en-3.3.0-9567.i586 is already installed package openoffice.org3-dict-es-3.3.0-9567.i586 is already installed package openoffice.org3-dict-fr-3.3.0-9567.i586 is already installed package openoffice.org3-draw-3.3.0-9567.i586 is already installed package openoffice.org3-en-US-3.3.0-9567.i586 is already installed package openoffice.org3-impress-3.3.0-9567.i586 is already installed package openoffice.org3-math-3.3.0-9567.i586 is already installed package openoffice.org3-writer-3.3.0-9567.i586 is already installed root@aserver [OOO330_m20_native_p acked-1_en-US.9567/RPMS]# soffice bash: soffice: command not found

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• Seg Fault when using std::string on an embedded Linux platform

  - by Brad

  Hi, I have been working for a couple of days on a problem with my application running on an embedded Arm Linux platform. Unfortunately the platform precludes me from using any of the usual useful tools for finding the exact issue. When the same code is run on the PC running Linux, I get no such error. In the sample below, I can reliably reproduce the problem by uncommenting the string, list or vector lines. Leaving them commented results in the application running to completion. I expect that something is corrupting the heap, but I cannot see what? The program will run for a few seconds before giving a segmentation fault. The code is compiled using a arm-linux cross compiler: arm-linux-g++ -Wall -otest fault.cpp -ldl -lpthread arm-linux-strip test Any ideas greatly appreciated. #include <stdio.h> #include <vector> #include <list> #include <string> using namespace std; ///////////////////////////////////////////////////////////////////////////// class TestSeg { static pthread_mutex_t _logLock; public: TestSeg() { } ~TestSeg() { } static void* TestThread( void *arg ) { int i = 0; while ( i++ < 10000 ) { printf( "%d\n", i ); WriteBad( "Function" ); } pthread_exit( NULL ); } static void WriteBad( const char* sFunction ) { pthread_mutex_lock( &_logLock ); printf( "%s\n", sFunction ); //string sKiller; // <----------------------------------Bad //list<char> killer; // <----------------------------------Bad //vector<char> killer; // <----------------------------------Bad pthread_mutex_unlock( &_logLock ); return; } void RunTest() { int threads = 100; pthread_t _rx_thread[threads]; for ( int i = 0 ; i < threads ; i++ ) { pthread_create( &_rx_thread[i], NULL, TestThread, NULL ); } for ( int i = 0 ; i < threads ; i++ ) { pthread_join( _rx_thread[i], NULL ); } } }; pthread_mutex_t TestSeg::_logLock = PTHREAD_MUTEX_INITIALIZER; int main( int argc, char *argv[] ) { TestSeg seg; seg.RunTest(); pthread_exit( NULL ); }

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• Python install issue on Mac OS X

  - by Michael Waterfall

  I have been using the standard python that comes with OS X Lion (2.7.2) but I wanted to build a UCS-4 version to handle 4-byte unicode characters better. I had already installed pip and packages like pytz, virtualenv and virtualenvwrapper, etc., and these are installed in /Library/Python/2.7/site-packages. My $PATH is /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin. To build a new version of python on the machine (outside of any project specific virtual environments, that will come later), I followed the instructions on this article and managed to build it in /usr/local/bin. The problem is that when I launched a new bash window, I got the following virtualenvwrapper error: Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: No module named virtualenvwrapper.hook_loader virtualenvwrapper.sh: There was a problem running the initialization hooks. If Python could not import the module virtualenvwrapper.hook_loader, check that virtualenv has been installed for VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python and that PATH is set properly. The instructions said to move /usr/local/bin to the top of the /etc/paths file, and since then I've noticed some strange issues. I installed pip into /usr/local/bin and now I have assumed that since I'm working in /usr/local/bin, and the newly installed python's site packages is now located in /usr/local/lib/python2.7/site-packages, when I do pip freeze, it should be empty as nothing is installed there yet. However, pip freeze still reports things installed in the old (OS X) site-packages folder. Here's some info after the build: $ which python /usr/local/bin/python $ which pip /usr/local/bin/pip $ echo $PATH /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin When I uninstall a python package with pip, it removes it from the old site-packages folder as expected. When I install it again, instead of installing it in /usr/local/lib/python2.7/site-packages, it installs it in /Library/Python/2.7/site-packages (verified by attempting to install it again and receiving Requirement already satisfied (use --upgrade to upgrade): pytz in /Library/Python/2.7/site-packages ). How is it getting that path for the old site-packages folder? Why won't it install it in the correct location for the python install it's using? I'm getting several other issues since promoting /usr/local/bin but I think if I understand this I'll be able to get somewhere. Can anyone see what's happening? If you need any more info I'll be happy to provide it.

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• Starting/Stopping Custom PHP Chat Server Linux Service (CentOS)

  - by chad

  I have been trying all night to get this service working properly. I created this script from a template and am very new to bash coding. I wrote a fully functioning chat server in php which runs endlessly, but now want to make it a dedicated service. I want to do this so that it starts on server boot and boots back up if possible when there are any down-times with the server. The issue is that I need this thing to run in a detached screen so that I can monitor packet data or send server commands via SSH when need-be. The main problem that i'm having is that it needs to have its own PID when it starts so that I can stop/restart it when needed. I am the type who grinds on coding until I figure it out, but this is so new to me that it seems the learning curve here is very steep and frustrating. Below is my code if anybody can please help me with this one, i've gotten so tired I can't even concentrate any more :( #!/bin/sh # # chatserver # # chkconfig: 345 20 90 # description: chatServer Linux Service Daemon \ # for general server handling ### BEGIN INIT INFO # Provides: chatserver # Required-Start: $local_fs $network $named $syslog # Required-Stop: $local_fs $syslog # Default-Start: 3 4 5 # Default-Stop: 0 1 2 6 # Short-Description: This service maintains the chatServer # Description: chatServer Linux Service Daemon # for general server handling ### END INIT INFO # Source function library. . /etc/rc.d/init.d/functions exec="screen php -q /var/www/html/chatServer.php" prog="chatserver" config="/etc/sysconfig/$prog" pidfile="/var/run/chatserver.pid" [ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog lockfile=/var/lock/subsys/$prog start() { #$exec || exit 5 echo -n $"Starting $prog: " daemon $exec --name=$exec --pidfile=$pidfile retval=$? echo [ $retval -eq 0 ] && touch $lockfile return $retval } stop() { echo -n $"Stopping $prog: " killproc -p $pidfile rm -f $pidfile retval=$? echo [ $retval -eq 0 ] && rm -f $lockfile return $retval } restart() { stop start } reload() { restart } force_reload() { restart } rh_status() { # run checks to determine if the service is running or use generic status status $prog } rh_status_q() { rh_status >/dev/null 2>&1 } case "$1" in start) rh_status_q && exit 0 $1 ;; stop) rh_status_q || exit 0 $1 ;; restart) $1 ;; reload) rh_status_q || exit 7 $1 ;; force-reload) force_reload ;; status) rh_status ;; condrestart|try-restart) rh_status_q || exit 0 restart ;; *) echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}" exit 2 esac exit $?

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• Active directory integration not working properly with winbind and samba

  - by tubaguy50035

  I'm trying to get my linux box to use active directory authentication. I believe I have almost everything setup correctly. I'm able to issue wbinfo -g and wbinfo -u and see all the groups and users respectively. Brief intro to my setup: The username I use on my linux box to do admin things is nick. My active directory username is nwalke. They have two different passwords. I am able to log in to the box with nick and that user's password and I'm also able to login as nwalke with nwalke's password. The curious bit: Upon creating the active directory user's home directory, I run a script that requires root access. This is to setup some system wide things like a samba share for them. When I log in as nwalke, I enter my nwalke password and it succeeds. I'm then greeted with [sudo] password for nick:. If I enter my nwalke password here, it says Sorry, try again.. If I enter nick's password, it says Sorry, user nick is not allowed to execute scriptname as root. If I do groups as nwalke, I see that magically my user has been given the group nick. Now, I accidentally thought that nick had a UID of 100, not 1000. So originally in my smb.conf I had idmap uid 1000-10000. The only thing I can think of, is that I logged in with nwalke while that was still set and now I'm just being presented with a UID of 1000 forcing linux to think I'm nick. I'm not really sure where to go from here. Like I said, I'm fairly certain active directory is communicating with my server properly, but something must not be mapped right on the linux side. Any thoughts? Here is my smb.conf: [global] security = ads netbios name = hostname realm = COMPANY.COM password server = adshost.company.com workgroup = COMPANY idmap uid = 10000-90000 idmap gid = 10000-90000 winbind separator = + winbind enum users = no winbind enum groups = no winbind use default domain = yes template homedir = /home/%D/%U template shell = /bin/bash client use spnego = yes domain master = no load printers = no printing = bsd printcap name = /dev/null disable spoolss = yes Let me know if more information about something is required.

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• Am I Leaking ADO.NET Connections?

  - by HardCode

  Here is an example of my code in a DAL. All calls to the database's Stored Procedures are structured this way, and there is no in-line SQL. Friend Shared Function Save(ByVal s As MyClass) As Boolean Dim cn As SqlClient.SqlConnection = Dal.Connections.MyAppConnection Dim cmd As New SqlClient.SqlCommand Try cmd.Connection = cn cmd.CommandType = CommandType.StoredProcedure cmd.CommandText = "proc_save_my_class" cmd.Parameters.AddWithValue("@param1", s.Foo) cmd.Parameters.AddWithValue("@param2", s.Bar) Return True Finally Dal.Utility.CleanupAdoObjects(cmd, cn) End Try End Function Here is the Connection factory (if I am using the correct term): Friend Shared Function MyAppConnection() As SqlClient.SqlConnection Dim cn As New SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("MyConnectionString").ToString) cn.Open() If cn.State <> ConnectionState.Open Then ' CriticalException is a custom object inheriting from Exception. Throw New CriticalException("Could not connect to the database.") Else Return cn End If End Function Here is the Dal.Utility.CleaupAdoObjects() function: Friend Shared Sub CleanupAdoObjects(ByVal cmd As SqlCommand, ByVal cn As SqlConnection) If cmd IsNot Nothing Then cmd.Dispose() If cn IsNot Nothing AndAlso cn.State <> ConnectionState.Closed Then cn.Close() End Sub I am getting a lot of "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding." error messages reported by the users. The application's DAL opens a connection, reads or saves data, and closes it. No connections are ever left open - intentionally! There is nothing obvious on the Windows 2000 Server hosting the SQL Server 2000 that would indicate a problem. Nothing in the Event Logs and nothing in the SQL Server logs. The timeouts happen randomly - I cannot reproduce. It happens early in the day with only 1 to 5 users in the system. It also happens with around 50 users in the system. The most connections to SQL Server via Performance Monitor, for all databases, has been about 74. The timeouts happen in code that both saves to, and reads from, the database in different parts of the application. The stack trace does not point to one or two offending DAL functions. It's happened in many different places. Does my ADO.NET code appear to be able to leak connections? I've goolged around a bit, and I've read that if the connection pool fills up, this can happen. However, I'm not explicitly setting any connection pooling. I've even tried to increase the Connection Timeout in the connection string, but timeouts happen long before the 300 second (5 minute) value: <add name="MyConnectionString" connectionString="Data Source=MyServer;Initial Catalog=MyDatabase;Integrated Security=SSPI;Connection Timeout=300;"/> I'm at a total loss already as to what is causing these Timeout issues. Any ideas are appreciated.

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• Unbalanced calls to begin/end appearance transitions for <ViewController>,<Tab>

  - by onkar

  I am trying to implement Tabs into my secondView.On button touch(from ViewController.m) I am navigating to secondView(Tabs). In my Tabs.xib file I have added a TabBar at bottom and it is custom class of UITabBar. ViewController.m - (IBAction)touchedInside:(id)sender { NSLog(@"touhced up inside"); Tabs *temp = [[Tabs alloc]initWithNibName:@"Tabs" bundle:nil]; [self.navigationController pushViewController:temp animated:YES]; [self presentViewController:temp animated:YES completion:nil]; } Tabs.m - (void)viewDidLoad { [super viewDidLoad]; AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; UITabBarController *tabBarController = [[UITabBarController alloc]init]; /* Tab_1 *firstView = [[Tab_1 alloc] init]; UITabBarItem *item1 = [[UITabBarItem alloc]initWithTitle:@"First" image:nil tag:1]; [firstView setTabBarItem:item1]; NSLog(@"after first tab is added"); Tab_2 *secondView = [[Tab_2 alloc] init]; UITabBarItem *item2 = [[UITabBarItem alloc]initWithTitle:@"Sec" image:nil tag:1] ; [secondView setTabBarItem:item2]; NSLog(@"after second tab is added"); [tabBarController setViewControllers:[NSArray arrayWithObjects:firstView,secondView,nil] animated:NO]; NSLog(@"after tab is added"); [appDelegate.window addSubview:tabBarController.view]; NSLog(@"after view is added"); */ appDelegate.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // Override point for customization after application launch. UIViewController *viewController1 = [[Tab_1 alloc] initWithNibName:@"Tab 1" bundle:nil]; UIViewController *viewController2 = [[Tab_2 alloc] initWithNibName:@"Tab 2" bundle:nil]; UIViewController *viewController3 = [[Tab_2 alloc] initWithNibName:@"Tab 1" bundle:nil]; tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, viewController3, nil]; appDelegate.window.rootViewController = self.tabBarController; [appDelegate.window makeKeyAndVisible]; Tabs *temp = [[Tabs alloc]initWithNibName:@"Tabs" bundle:nil]; [self.navigationController presentModalViewController:temp animated:NO]; } Errors Unbalanced calls to begin/end appearance transitions for <ViewController: 0x6833c80>. 2012-12-06 09:57:48.963 demoTabs[667:f803] Unbalanced calls to begin/end appearance transitions for <Tabs: 0x6a3fc90>.

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• Permission denied install Joomla CiviCRM

  - by Tim

  Dear All, I am trying to install CiviCRM on a Joomla 1.5.17 web server running Ubuntu 9.10. Uploading the package to the tmp directory in /var/www/[site name]/tmp and installing creates this error: Warning: fopen(/var/www/trbcp/administrator/components/com_civicrm/civicrm/templates/CRM/common/civicrm.settings.php.tpl) [function.fopen]: failed to open stream: Permission denied in /var/www/trbcp/libraries/joomla/filesystem/file.php on line 240 Warning: fopen(/var/www/trbcp/administrator/components/com_civicrm/civicrm/templates/CRM/common/civicrm.settings.php.tpl) [function.fopen]: failed to open stream: Permission denied in /var/www/trbcp/libraries/joomla/filesystem/file.php on line 240 Warning: include_once(/var/www/trbcp/administrator/components/com_civicrm/civicrm.settings.php) [function.include-once]: failed to open stream: Permission denied in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 115 Warning: include_once() [function.include]: Failed opening '/var/www/trbcp/administrator/components/com_civicrm/civicrm.settings.php' for inclusion (include_path='.') in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 115 Warning: require_once(DB.php) [function.require-once]: failed to open stream: No such file or directory in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 140 Fatal error: require_once() [function.require]: Failed opening required 'DB.php' (include_path='.') in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 140 Initially I got a permissions denied error and thought that Joomla did not have permissions to all its directories but looking at Help-System information all the necessary directories are writable. I then decided to chmod 777 all the directories and try again but it still fails. Looking at the directories afterwards it seems that the new directories being created are not being created 777. By changing them I can get at least one step further before the error appears again. My question is does anyone know how to get round this? I am thinking that the new directories being created will require sudo privileges to have mv and create actions carried out, hence the permission denied errors. Can this be configured in Joomla? Or is there a way to specify that new directories created in /var/www/[site name] take 777 by default? any help greatly appreciated! EDIT: P.S. if anyone could give me a clue as to how the insert code feature works as well that would be great! Might make this post a bit more readable! EDIT2: Well I have had a bash at changing the permissions and ownership. sudo chown -R www-data:www-data /var/www/trbcp I then tried changing the whole /var directory (insecure I know but this is a test and dev server for me to find my feet on) to 777 and still getting permission errors. It seems to be error opening stream? Not a php guy so not sure what that is but could it be that permissions to run php script need to change? any thoughts greatly appreciated.

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• HAProxy + Percona XtraDB Cluster

  - by rottmanj

  I am attempting to setup HAproxy in conjunction with Percona XtraDB Cluster on a series of 3 EC2 instances. I have found a few tutorials online dealing with this specific issue, but I am a bit stuck. Both the Percona servers and the HAproxy servers are running ubuntu 12.04. The HAProxy version is 1.4.18, When I start HAProxy I get the following error: Server pxc-back/db01 is DOWN, reason: Socket error, check duration: 2ms. I am not really sure what the issue could be. I have verified the following: EC2 security groups ports are open Poured over my config files looking for issues. I currently do not see any. Ensured that xinetd was installed Ensured that I am using the correct ip address of the mysql server. Any help with this is greatly appreciated. Here are my current config Load Balancer /etc/haproxy/haproxy.cfg global log 127.0.0.1 local0 log 127.0.0.1 local1 notice maxconn 4096 user haproxy group haproxy debug #quiet daemon defaults log global mode http option tcplog option dontlognull retries 3 option redispatch maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 frontend pxc-front bind 0.0.0.0:3307 mode tcp default_backend pxc-back frontend stats-front bind 0.0.0.0:22002 mode http default_backend stats-back backend pxc-back mode tcp balance leastconn option httpchk server db01 10.86.154.105:3306 check port 9200 inter 12000 rise 3 fall 3 backend stats-back mode http balance roundrobin stats uri /haproxy/stats MySql Server /etc/xinetd.d/mysqlchk # default: on # description: mysqlchk service mysqlchk { # this is a config for xinetd, place it in /etc/xinetd.d/ disable = no flags = REUSE socket_type = stream port = 9200 wait = no user = nobody server = /usr/bin/clustercheck log_on_failure += USERID #only_from = 0.0.0.0/0 # recommended to put the IPs that need # to connect exclusively (security purposes) per_source = UNLIMITED } MySql Server /etc/services Added the line mysqlchk 9200/tcp # mysqlchk MySql Server /usr/bin/clustercheck # GNU nano 2.2.6 File: /usr/bin/clustercheck #!/bin/bash # # Script to make a proxy (ie HAProxy) capable of monitoring Percona XtraDB Cluster nodes properly # # Author: Olaf van Zandwijk <[email protected]> # Documentation and download: https://github.com/olafz/percona-clustercheck # # Based on the original script from Unai Rodriguez # MYSQL_USERNAME="testuser" MYSQL_PASSWORD="" ERR_FILE="/dev/null" AVAILABLE_WHEN_DONOR=0 # # Perform the query to check the wsrep_local_state # WSREP_STATUS=`mysql --user=${MYSQL_USERNAME} --password=${MYSQL_PASSWORD} -e "SHOW STATUS LIKE 'wsrep_local_state';" 2>${ERR_FILE} | awk '{if (NR!=1){print $2}}' 2>${ERR_FILE}` if [[ "${WSREP_STATUS}" == "4" ]] || [[ "${WSREP_STATUS}" == "2" && ${AVAILABLE_WHEN_DONOR} == 1 ]] then # Percona XtraDB Cluster node local state is 'Synced' => return HTTP 200 /bin/echo -en "HTTP/1.1 200 OK\r\n" /bin/echo -en "Content-Type: text/plain\r\n" /bin/echo -en "\r\n" /bin/echo -en "Percona XtraDB Cluster Node is synced.\r\n" /bin/echo -en "\r\n" else # Percona XtraDB Cluster node local state is not 'Synced' => return HTTP 503 /bin/echo -en "HTTP/1.1 503 Service Unavailable\r\n" /bin/echo -en "Content-Type: text/plain\r\n" /bin/echo -en "\r\n" /bin/echo -en "Percona XtraDB Cluster Node is not synced.\r\n" /bin/echo -en "\r\n" fi

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• How to salvage SQL server 2008 query from KILLED/ROLLBACK state?

  - by littlegreen

  I have a stored procedure that inserts batches of millions of rows, emerging from a certain query, into an SQL database. It has one parameter selecting the batch; when this parameter is omitted, it will gather a list of batches and recursively call itself, in order to iterate over batches. In (pseudo-)code, it looks something like this: CREATE PROCEDURE spProcedure AS BEGIN IF @code = 0 BEGIN ... WHILE @@Fetch_Status=0 BEGIN EXEC spProcedure @code FETCH NEXT ... INTO @code END END ELSE BEGIN -- Disable indexes ... INSERT INTO table SELECT (...) -- Enable indexes ... Now it can happen that this procedure is slow, for whatever reason: it can't get a lock, one of the indexes it uses is misdefined or disabled. In that case, I want to be able kill the procedure, truncate and recreate the resulting table, and try again. However, when I try and kill the procedure, the process frequently oozes into a KILLED/ROLLBACK state from which there seems to be no return. From Google I have learned to do an sp_lock, find the spid, and then kill it with KILL <spid>. But when I try to kill it, it tells me SPID 75: transaction rollback in progress. Estimated rollback completion: 0%. Estimated time remaining: 554 seconds. I did find a forum message hinting that another spid should be killed before the other one can start a rollback. But that didn't work for me either, plus I do not understand, why that would be the case... could it be because I am recursively calling my own stored procedure? (But it should be having the same spid, right?) In any case, my process is just sitting there, being dead, not responding to kills, and locking the table. This is very frustrating, as I want to go on developing my queries, not waiting hours on my server sitting dead while pretending to be finishing a supposed rollback. Is there some way in which I can tell the server not to store any rollback information for my query? Or not to allow any other queries to interfere with the rollback, so that it will not take so long? Or how to rewrite my query in a better way, or how kill the process successfully without restarting the server?

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• Segfault (possibly due to casting)

  - by BSchlinker

  I don't normally go to stackoverflow for sigsegv errors, but I have done all I can with my debugger at the moment. The segmentation fault error is thrown following the completion of the function. Any ideas what I'm overlooking? I suspect that it is due to the casting of the sockaddr to the sockaddr_in, but I am unable to find any mistakes there. (Removing that line gets rid of the seg fault -- but I know that may not be the root cause here). // basic setup int sockfd; char str[INET_ADDRSTRLEN]; sockaddr* sa; socklen_t* sl; struct addrinfo hints, *servinfo, *p; int rv; memset(&hints, 0, sizeof hints); hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; // return string string foundIP; // setup the struct for a connection with selected IP if ((rv = getaddrinfo("4.2.2.1", NULL, &hints, &servinfo)) != 0) { fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv)); return "1"; } // loop through all the results and make a socket for(p = servinfo; p != NULL; p = p->ai_next) { if ((sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) { perror("talker: socket"); continue; } break; } if (p == NULL) { fprintf(stderr, "talker: failed to bind socket\n"); return "2"; } // connect the UDP socket to something connect(sockfd, p->ai_addr, p->ai_addrlen); // we need to connect to get the systems local IP // get information on the local IP from the socket we created getsockname(sockfd, sa, sl); // convert the sockaddr to a sockaddr_in via casting struct sockaddr_in *sa_ipv4 = (struct sockaddr_in *)sa; // get the IP from the sockaddr_in and print it inet_ntop(AF_INET, &(sa_ipv4->sin_addr), str, INET_ADDRSTRLEN); printf("%s\n", str); // return the IP return foundIP; }

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• Excluding child processes from ps

  - by stefpet

  Background: To reload app configuration I need to kill -HUP the parent processes' PIDs. To find PIDs I currently use ps auxf | grep gunicorn with the following example output: $ ps auxf | grep gunicorn stpe 4222 0.0 0.2 64524 11668 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4225 0.0 0.4 76920 16332 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4226 0.0 0.4 76932 16340 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4227 0.0 0.4 76940 16344 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4228 0.0 0.4 76948 16344 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4229 0.0 0.4 76960 16356 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4230 0.0 0.4 76972 16368 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4231 0.0 0.4 78856 18644 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4232 0.0 0.4 76992 16376 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 5685 0.0 0.0 22076 908 pts/1 S+ 11:50 0:00 | \_ grep --color=auto gunicorn stpe 5012 0.0 0.2 64512 11656 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5021 0.0 0.4 77656 17156 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5022 0.0 0.4 77664 17156 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5023 0.0 0.4 77672 17164 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5024 0.0 0.4 77684 17196 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5025 0.0 0.4 77692 17200 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5026 0.0 0.4 77700 17208 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5027 0.0 0.4 77712 17220 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5028 0.0 0.4 77720 17220 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py Based on the above I see that it is 4222 and 5012 I need to HUP. Question: How can I exclude the child processes and only get the parent process (please note however that the processes I want do also have a parent (e.g. bash) that I'm uninterested with)? Using a regexp with grep on how much indentation there is in the ascii tree feels dirty. Is there a better way? Example: The desired output would be something like this. stpe 4222 0.0 0.2 64524 11668 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 5012 0.0 0.2 64512 11656 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py This would be easily parseable to be able to automatically find the PIDs in a script that does the HUPing which is the goal.

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• AD - DirectoryServices: VBNET2.0 - Speaking architecture...

  - by Will Marcouiller

  I've been mandated to write an application to migrate the Active Directory access models to another environment. Here's the context: I'm stuck with VB.NET 2005 and .NET Framework 2.0; The application must use the Windows authenticated user to manage AD; The objects I have to handle are Groups, Users and OrganizationalUnits; I intend to use the Façade design pattern to provider ease of use and a fully reusable code; I plan to write a factory for each of the objects managed (group, ou, user); The use of Attributes should be useful here, I guess; As everything is about the DirectoryEntry class when accessing the AD, it seems a good candidate for generic types. Obligatory features: User creates new OUs manually; User creates new group manually; User creates new user (these users are services accounts) manually; Application reads an XML file which contains the OUs, groups and users to create; Application informs the user about the OUs, groups and users that shall be created; User specifies the domain environment where to migrate the XML input file designated objects; User makes changes if needed, and launches the task operations; Application performs required by the XML input file operations against the underlying AD as specified by the user; Application informs the user upon completion. Linear features: User fetches OUs, groups, users; User changes OUs, groups, users; User deletes OUs, groups, users; The application logs AD entries and operations performed, plus errors and exceptions; Nice-to-have features: Application rollbacks operations on error or exception. I've been working for weeks now to get acquainted with the AD and the System.DirectoryServices assembly. But I don't seem to find a way to be fully satisfied with what I'm doing and always looking for better. I have studied Bret de Smet's Linq to AD on CodePlex, but then again, I can't use it as I'm stuck with .NET 2.0, so no Linq! But I've learned about Attributes, and seen that he's working with generic types as he codes a DirectorySource class to perform the operations for OUs, groups and users. Any suggestions? Thanks for any help, code sample, ideas, architural solution, everything!

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• An IOCP documentation interpretation question - buffer ownership ambiguity

  - by Poni

  Since I'm not a native English speaker I might be missing something so maybe someone here knows better than me. Taken from WSASend's doumentation at MSDN: lpBuffers [in] A pointer to an array of WSABUF structures. Each WSABUF structure contains a pointer to a buffer and the length, in bytes, of the buffer. For a Winsock application, once the WSASend function is called, the system owns these buffers and the application may not access them. This array must remain valid for the duration of the send operation. Ok, can you see the bold text? That's the unclear spot! I can think of two translations for this line (might be something else, you name it): Translation 1 - "buffers" refers to the OVERLAPPED structure that I pass this function when calling it. I may reuse the object again only when getting a completion notification about it. Translation 2 - "buffers" refer to the actual buffers, those with the data I'm sending. If the WSABUF object points to one buffer, then I cannot touch this buffer until the operation is complete. Can anyone tell what's the right interpretation to that line? And..... If the answer is the second one - how would you resolve it? Because to me it implies that for each and every data/buffer I'm sending I must retain a copy of it at the sender side - thus having MANY "pending" buffers (in different sizes) on an high traffic application, which really going to hurt "scalability". Statement 1: In addition to the above paragraph (the "And...."), I thought that IOCP copies the data to-be-sent to it's own buffer and sends from there, unless you set SO_SNDBUF to zero. Statement 2: I use stack-allocated buffers (you know, something like char cBuff[1024]; at the function body - if the translation to the main question is the second option (i.e buffers must stay as they are until the send is complete), then... that really screws things up big-time! Can you think of a way to resolve it? (I know, I asked it in other words above).

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• Annoying Captcha >> How to programm a form that can SMELL difference between human and robot?

  - by Sam

  Hi folks. On the comment of my old form needing a CAPTHA, I felt I share my problem, perhaps you recognize it and find its time we had better solutions: FACTUAL PROBLEM I know most of my clients (typical age= 40~60) hate CAPTCHA things. Now, I myself always feel like a robot, when I have to sueeze my eyes and fill in the strange letters from the Capcha... Sometimes I fail! Go back etc. Turnoff. I mean comon its 2011, shouldnt the forms have better A.I. by now? MY NEW IDEA (please dont laugh) Ive thought about it and this is my idea's to tell difference between human and robot: My idea is to give credibility points. 100 points = human 0% = robot. require real human mouse movements require mousemovements that dont follow any mathematical pattern require non-instantaneous reading delays, between load and first input in form when typing in form, delays are measured between letters and words approve as human when typical human behaviour measured (deleting, rephrasing etc) dont allow instant pasting or all fields give points for real keyboard pressures retract points for credibility when hyperlinks in form Test wether fake email field (invisible by human) is populated (suggested by Tomalak) when more than 75% human cretibility, allow to be sent without captcha when less than 25% human crecibility, force captcha puzzle to be sure Could we write a A.I. PHP that replaces the human-annoying capthas, meanwhile stopping most spamservers filing in the data? Not only for the fun of it, but also actually to provide a 99% better alternative than CAPTHCA's. Imagine the userfriendlyness of your forms! Your site distinguishing itself from others, showing your audience your sites KNOWS the difference between a robot and a human. Imagine the advangage. I am trying to capture the essense of that distinguishing edge. PROGRAMMING QUESTION: 1) Are such things possible to programm? 2) If so how would you start such programm? 3) Are there already very good working solutions available elsewhere? 4) If it isn't so hard, your are welcome to share your answer/solutions below. 5) upon completion of hints and new ideas, could this page be the start of a new AI captcha, OR should I forget about it and just go with the flow, forget about the whole AI dream, and use captcha like everyone else.

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• grep simply fails when used on a few files

  - by Reid

  I've been trying for about the past 30 minutes to get this to work properly. grep is not exactly the most difficult thing to use, so I'm somewhat baffled as to why this won't work. The files I'm trying to use grep on are simple XHTML log files. Their names are in the format [email protected], though I don't think that should matter, and inside is simple XHTML. I copied one such log file to be testfile so you can see the output of some commands and why it's baffling to me: [~/.chatlogs_windows/dec] > whoami reid [~/.chatlogs_windows/dec] > type grep grep is /bin/grep [~/.chatlogs_windows/dec] > uname -a Linux reid-pc 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:32:27 UTC 2010 x86_64 GNU/Linux [~/.chatlogs_windows/dec] > head -1 /etc/issue Linux Mint 10 Julia [~/.chatlogs_windows/dec] > ls -Alh | grep testfile -rw-r--r-- 1 reid reid 63K 2011-01-10 12:45 testfile [~/.chatlogs_windows/dec] > tail -3 testfile </body> </html> [~/.chatlogs_windows/dec] > file testfile testfile: XML document text [~/.chatlogs_windows/dec] > grep html testfile [~/.chatlogs_windows/dec] > grep body testfile [~/.chatlogs_windows/dec] > grep "</html>" testfile [~/.chatlogs_windows/dec] > grep "</body>" testfile [~/.chatlogs_windows/dec] > cat testfile | grep html [~/.chatlogs_windows/dec] > cat testfile | wc -l 231 [~/.chatlogs_windows/dec] > cat testfile | tail -3 </body> </html> [~/.chatlogs_windows/dec] > chmod a+rw testfile && ls -Alh | grep testfile -rw-rw-rw- 1 reid reid 63K 2011-01-10 12:45 testfile [~/.chatlogs_windows/dec] > grep html testfile That's what I'm attempting to do. I want to just use grep -ri query . in ~/.chatlogs_windows, which normally works perfectly for me... but for some reason, it completely fails at going through these files. If it matters, I copied these files off of my Windows 7 partition. But I chown'd them and gave myself all the appropriate permissions, and other programs (like cat) seem to read them just fine. I also copied testfile to testfile_unix and converted the line endings and tried that, but it didn't work either. I'm using zsh, but I tried it on bash and that failed too. Also, grep works normally: I tried it out on my documents folder and it worked flawlessly. If you need any more information, just let me know. I tried googling around, but I found no reason for grep to simply not work. Thanks in advance.

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• nginx 502 bad gateway - fastcgi not listening? (Debian 5)

  - by Sean

  I have experience with nginx but it's always been pre-installed for me (via VPS.net pre-configured image). I really like what it does for me, and now I'm trying to install it on my own server with apt-get. This is a fairly fresh Debian 5 install. I have few extra packages installed but they're all .deb's, no manual compiling or anything crazy going on. Apache is already installed but I disabled it. I did apt-get install nginx and that worked fine. Changed the config around a bit for my needs, although the same problem I'm about to describe happens even with the default config. It took me a while to figure out that the default debian package for nginx doesn't spawn fastcgi processes automatically. That's pretty lame, but I figured out how to do that with this script, which I found posted on many different web sites: #!/bin/bash ## ABSOLUTE path to the PHP binary PHPFCGI="/usr/bin/php5-cgi" ## tcp-port to bind on FCGIPORT="9000" ## IP to bind on FCGIADDR="127.0.0.1" ## number of PHP children to spawn PHP_FCGI_CHILDREN=10 ## number of request before php-process will be restarted PHP_FCGI_MAX_REQUESTS=1000 # allowed environment variables sperated by spaces ALLOWED_ENV="ORACLE_HOME PATH USER" ## if this script is run as root switch to the following user USERID=www-data ################## no config below this line if test x$PHP_FCGI_CHILDREN = x; then PHP_FCGI_CHILDREN=5 fi ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_CHILDREN" ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_MAX_REQUESTS" ALLOWED_ENV="$ALLOWED_ENV FCGI_WEB_SERVER_ADDRS" if test x$UID = x0; then EX="/bin/su -m -c \"$PHPFCGI -q -b $FCGIADDR:$FCGIPORT\" $USERID" else EX="$PHPFCGI -b $FCGIADDR:$FCGIPORT" fi echo $EX # copy the allowed environment variables E= for i in $ALLOWED_ENV; do E="$E $i=${!i}" done # clean environment and set up a new one nohup env - $E sh -c "$EX" &> /dev/null & When I do a "ps -A | grep php5-cgi", I see the 10 processes running, that should be ready to listen. But when I try to view a web page via nginx, I just get a 502 bad gateway error. After futzing around a bit, I tried telneting to 127.0.0.1 9000 (fastcgi is listening on port 9000, and nginx is configured to talk to that port), but it just immediately closes the connection. This makes me think the problem is with fastcgi, but I'm not sure what I can do to test it. It may just be closing the connection because it's not getting fed any data to process, but it closes immediately so that makes me think otherwise. So... any advice? I can't figure it out. It doesn't help that it's 1AM, but I'm going crazy here!

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• AD-DirectoryServices: .NET2.0 - Speaking architecture, approach and best practices... Suggestions?

  - by Will Marcouiller

  I've been mandated to write an application to migrate the Active Directory access models to another environment. Here's the context: I'm stuck with VB.NET 2005 and .NET Framework 2.0; The application must use the Windows authenticated user to manage AD; The objects I have to handle are Groups, Users and OrganizationalUnits; I intend to use the Façade design pattern to provider ease of use and a fully reusable code; I plan to write a factory for each of the objects managed (group, ou, user); The use of Attributes should be useful here, I guess; As everything is about the DirectoryEntry class when accessing the AD, it seems a good candidate for generic types. Obligatory features: User creates new OUs manually; User creates new group manually; User creates new user (these users are services accounts) manually; Application reads an XML file which contains the OUs, groups and users to create; Application informs the user about the OUs, groups and users that shall be created; User specifies the domain environment where to migrate the XML input file designated objects; User makes changes if needed, and launches the task operations; Application performs required by the XML input file operations against the underlying AD as specified by the user; Application informs the user upon completion. Linear features: User fetches OUs, groups, users; User changes OUs, groups, users; User deletes OUs, groups, users; The application logs AD entries and operations performed, plus errors and exceptions; Nice-to-have features: Application rollbacks operations on error or exception. I've been working for weeks now to get acquainted with the AD and the System.DirectoryServices assembly. But I don't seem to find a way to be fully satisfied with what I'm doing and always looking for better. I have studied Bret de Smet's Linq to AD on CodePlex, but then again, I can't use it as I'm stuck with .NET 2.0, so no Linq! But I've learned about Attributes, and seen that he's working with generic types as he codes a DirectorySource class to perform the operations for OUs, groups and users. I have been able to add groups to the AD; I have been able to add users to the AD; The created user is automatically disabled? I seem to get confused with the use of a LDAP path to add objects. For instance, one needs two instances of a System.DirectoryServices.DirectoryEntry class to add a group, for instance. Why this? Any suggestions? Thanks for any help, code sample, ideas, architural solution, everything!

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• Configured MySQL for SSL , but SLL is still not in use..!

  - by Sunrays

  I configured SSL for MySQL using the following script. #!/bin/bash # mkdir -p /root/abc/ssl_certs cd /root/abc/ssl_certs # echo "--> 1. Create CA cert, private key" openssl genrsa 2048 > ca-key.pem echo "--> 2. Create CA cert, certificate" openssl req -new -x509 -nodes -days 1000 -key ca-key.pem > ca-cert.pem echo "--> 3. Create Server certificate, key" openssl req -newkey rsa:2048 -days 1000 -nodes -keyout server-key.pem > server-req.pem echo "--> 4. Create Server certificate, cert" openssl x509 -req -in server-req.pem -days 1000 -CA ca-cert.pem -CAkey ca-key.pem -set_serial 01 > server-cert.pem echo "" echo echo "" echo "--> 5. Create client certificate, key. Use DIFFERENT common name then server!!!!" echo "" openssl req -newkey rsa:2048 -days 1000 -nodes -keyout client-key.pem > client-req.pem echo "6. Create client certificate, cert" openssl x509 -req -in client-req.pem -days 1000 -CA ca-cert.pem -CAkey ca-key.pem -set_serial 01 > client-cert.pem exit 0 The following files were created: ca-key.pem ca-cert.pem server-req.pem server-key.pem server-cert.pem client-req.pem client-key.pem client-cert.pem Then I combined server-cert.pem and client-cert.pem into ca.pem (I read in a post to do so..) I created a ssl user in MySQL: GRANT ALL ON *.* to sslsuer@hostname IDENTIFIED BY 'pwd' REQUIRE SSL; Next I added the following in my.cnf [mysqld] ssl-ca = /root/abc/ssl_certs/ca.pem ssl-cert = /root/abc/ssl_certs/server-cert.pem ssl-key = /root/abc/ssl_certs/server-key.pem After restarting the server,I connected to mysql but SSL was still not in use :( mysql -u ssluser -p SSL: Not in use Even the have_ssl parameter was still showing disabled.. :( mysql> show variables like '%ssl%'; +---------------+---------------------------------------------+ | Variable_name | Value | +---------------+---------------------------------------------+ | have_openssl | DISABLED | | have_ssl | DISABLED | | ssl_ca | /root/abc/ssl_certs/ca.pem | | ssl_capath | | | ssl_cert | /root/abc/ssl_certs/server-cert.pem | | ssl_cipher | | | ssl_key | /root/abc/ssl_certs/server-key.pem | +---------------+---------------------------------------------+ Have I missed any step, or whats wrong.. Answers with missed steps in detail will be highly appreciated..

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• How can I force all internet traffic over a PPTP VPN but still allow local lan access?

  - by user126715

  I have a server running Linux Mint 12 that I want to keep connected to a PPTP VPN all the time. The VPN server is pretty reliable, but it drops on occasion so I just want to make it so all internet activity is disabled if the VPN connection is broken. I'd also like to figure out a way to restart it automatically, but that's not as big of an issue since this happens pretty rarely. I also want to always be able to connect to the box from my lan, regardless of whether the VPN is up or not. Here's what my ifconfig looks like with the VPN connected properly: eth0 Link encap:Ethernet HWaddr 00:22:15:21:59:9a inet addr:192.168.0.171 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::222:15ff:fe21:599a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:37389 errors:0 dropped:0 overruns:0 frame:0 TX packets:29028 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:37781384 (37.7 MB) TX bytes:19281394 (19.2 MB) Interrupt:41 Base address:0x8000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1446 errors:0 dropped:0 overruns:0 frame:0 TX packets:1446 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:472178 (472.1 KB) TX bytes:472178 (472.1 KB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.10.11.10 P-t-P:10.10.11.9 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:23 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:1368 (1.3 KB) TX bytes:1812 (1.8 KB) Here's an iptables script I found elsewhere that seemed to be for the problem I'm trying to solve, but it wound up blocking all access, but I'm not sure what I need to change: #!/bin/bash #Set variables IPT=/sbin/iptables VPN=`ifconfig|perl -nE'/dr:(\S+)/&&say$1'|grep 10.` LAN=192.168.0.0/24 #Flush rules $IPT -F $IPT -X #Default policies and define chains $IPT -P OUTPUT DROP $IPT -P INPUT DROP $IPT -P FORWARD DROP #Allow input from LAN and tun0 ONLY $IPT -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT $IPT -A INPUT -i lo -j ACCEPT $IPT -A INPUT -i tun0 -m conntrack --ctstate NEW -j ACCEPT $IPT -A INPUT -s $LAN -m conntrack --ctstate NEW -j ACCEPT $IPT -A INPUT -j DROP #Allow output from lo and tun0 ONLY $IPT -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT $IPT -A OUTPUT -o lo -j ACCEPT $IPT -A OUTPUT -o tun0 -m conntrack --ctstate NEW -j ACCEPT $IPT -A OUTPUT -d $VPN -m conntrack --ctstate NEW -j ACCEPT $IPT -A OUTPUT -j DROP exit 0 Thanks for your help.

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• Nagios shell script cannot be executed

  - by MeinAccount

  I'm trying to monitor GitLab with nagios. I've created the following command definition and shell script but when checking the service I'm receiving the following e-mail. How can I solve this? The file is executable. [...] nagios : 3 incorrect password attempts ; TTY=unknown ; PWD=/ ; USER=git ; COMMAND=/bin/bash -c /var/lib/nagios/custom_plugins/check_gitlab.sh Command definition: define command { command_name custom_check_gitlab command_line /var/lib/nagios/custom_plugins/check_gitlab.sh } Shell script: #! /bin/sh # [...] RAILS_ENV="production" # Script variable names should be lower-case not to conflict with internal /bin/sh variables such as PATH, EDITOR or SHELL. app_root="/home/git/gitlab" app_user="git" unicorn_conf="$app_root/config/unicorn.rb" pid_path="$app_root/tmp/pids" socket_path="$app_root/tmp/sockets" web_server_pid_path="$pid_path/unicorn.pid" sidekiq_pid_path="$pid_path/sidekiq.pid" ### Here ends user configuration ### # Switch to the app_user if it is not he/she who is running the script. if [ "$USER" != "$app_user" ]; then sudo -u "$app_user" -H -i $0 "$@"; exit; fi # Switch to the gitlab path, if it fails exit with an error. if ! cd "$app_root" ; then echo "Failed to cd into $app_root, exiting!"; exit 1 fi ### Init Script functions check_pids(){ if ! mkdir -p "$pid_path"; then echo "Could not create the path $pid_path needed to store the pids." exit 1 fi # If there exists a file which should hold the value of the Unicorn pid: read it. if [ -f "$web_server_pid_path" ]; then wpid=$(cat "$web_server_pid_path") else wpid=0 fi if [ -f "$sidekiq_pid_path" ]; then spid=$(cat "$sidekiq_pid_path") else spid=0 fi } # Checks whether the different parts of the service are already running or not. check_status(){ check_pids # If the web server is running kill -0 $wpid returns true, or rather 0. # Checks of *_status should only check for == 0 or != 0, never anything else. if [ $wpid -ne 0 ]; then kill -0 "$wpid" 2>/dev/null web_status="$?" else web_status="-1" fi if [ $spid -ne 0 ]; then kill -0 "$spid" 2>/dev/null sidekiq_status="$?" else sidekiq_status="-1" fi } check_pids check_status if [ "$web_status" != "0" -a "$sidekiq_status" != "0" ]; then echo "GitLab is not running." exit 2 fi if [ "$web_status" != "0" ]; then printf "The GitLab Unicorn webserver is \033[31mnot running\033[0m.\n" exit 1 fi if [ "$sidekiq_status" != "0" ]; then printf "The GitLab Sidekiq job dispatcher is \033[31mnot running\033[0m.\n" exit 1 fi if [ "$web_status" = "0" -a "$sidekiq_status" = "0" ]; then printf "GitLab and all it's components are \033[32mup and running\033[0m.\n" exit 0 fi

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• The best way to separate admin functionality from a public site?

  - by AndrewO

  I'm working on a site that's grown both in terms of user-base and functionality to the point where it's becoming evident that some of the admin tasks should be separate from the public website. I was wondering what the best way to do this would be. For example, the site has a large social component to it, and a public sales interface. But at the same time, there's back office tasks, bulk upload processing, dashboards (with long running queries), and customer relations tools in the admin section that I would like to not be effected by spikes in public traffic (or effect the public-facing response time). The site is running on a fairly standard Rails/MySQL/Linux stack, but I think this is more of an architecture problem than an implementation one: mainly, how does one keep the data and business logic in sync between these different applications? Some strategies that I'm evaluating: 1) Create a slave database of the public facing database on another machine. Extract out all of the model and library code so that it can be shared between the applications. Create new controllers and views for the admin interfaces. I have limited experience with replication and am not even sure that it's supposed to be used this way (most of the time I've seen it, it's been for scaling out the read capabilities of the same application, rather than having multiple different ones). I'm also worried about the potential for latency issues if the slave is not on the same network. 2) Create new more task/department-specific applications and use a message oriented middleware to integrate them. I read Enterprise Integration Patterns awhile back and they seemed to advocate this for distributed systems. (Alternatively, in some cases the basic Rails-style RESTful API functionality might suffice.) But, I have nightmares about data synchronization issues and the massive re-architecting that this would entail. 3) Some mixture of the two. For example, the only public information necessary for some of the back office tasks is a read-only completion time or status. Would it make sense to have that on a completely separate system and send the data to public? Meanwhile, the user/group admin functionality would be run on a separate system sharing the database? The downside is, this seems to keep many of the concerns I have with the first two, especially the re-architecting. I'm sure the answers are going to be highly dependent on a site's specific needs, but I'd love to hear success (or failure) stories.

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• FTP not listing files behind firewall (setsockopt (ignored): Permission denied)

  - by KennyDs

  We are developing a Magento application that has a module that works with FTP. Today we deployed this on the testing environment which is setup in the following way: Gateway server which has the following iptables rules: # iptables -L -n -v Chain INPUT (policy ACCEPT 2 packets, 130 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 165 13720 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED Chain FORWARD (policy ACCEPT 7 packets, 606 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- eth1 eth0 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 15 965 ACCEPT all -- eth0 eth1 0.0.0.0/0 0.0.0.0/0 0 0 REJECT all -- eth1 eth1 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable Chain OUTPUT (policy ACCEPT 126 packets, 31690 bytes) pkts bytes target prot opt in out source destination These are set at runtime via the following bash script: #!/bin/sh PATH=/usr/sbin:/sbin:/bin:/usr/bin # # delete all existing rules. # iptables -F iptables -t nat -F iptables -t mangle -F iptables -X # Always accept loopback traffic iptables -A INPUT -i lo -j ACCEPT # Allow established connections, and those not coming from the outside iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -i eth1 -o eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow outgoing connections from the LAN side. iptables -A FORWARD -i eth0 -o eth1 -j ACCEPT # Masquerade. iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE # Don't forward from the outside to the inside. iptables -A FORWARD -i eth1 -o eth1 -j REJECT # Enable routing. echo 1 > /proc/sys/net/ipv4/ip_forward The gateway server is connected to the WAN via eth1 and is connected to the internal network via eth0. One of the servers from eth1 has the following problem when trying to list files over ftp: $ ftp -vd myftpserver.com Connected to myftpserver.com 220 Welcome to MY FTP Server ftp: setsockopt: Bad file descriptor Name (myftpserver.com:magento): XXXXXXXX ---> USER XXXXXXXX 331 User XXXXXXXX, password please Password: ---> PASS XXXX 230 Password Ok, User logged in ---> SYST 215 UNIX Type: L8 Remote system type is UNIX. Using binary mode to transfer files. ftp> ls ftp: setsockopt (ignored): Permission denied ---> PORT 192,168,19,15,135,75 421 Service not available, remote server has closed connection When I try listing the files in passive mode, same result. When I run the same command on the gateway server, everything works fine so I believe that the issue is happening because of the iptables rules not forwarding properly. Does anyone have an idea which rule I need to add to make this work?

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• Can't save screen resolution setting.

  - by Searock

  Hi, My screen resolution in windows and previous version of Ubuntu (9.04) was 1152 x 864. But in Ubuntu 10.04 it gives me an option of 1024 x 786 and 1360 x 786. I have some how managed to add 1152x684 resolution by using xrandr command. searock@searock-desktop:~$ cvt 1152 864 1152x864 59.96 Hz (CVT 1.00M3) hsync: 53.78 kHz; pclk: 81.75 MHz Modeline "1152x864_60.00" 81.75 1152 1216 1336 1520 864 867 871 897 -hsync +vsync searock@searock-desktop:~$ xrandr --newmode "1152x864_60.00" 81.75 1152 1216 1336 1520 864 867 871 897 -hsync +vsync searock@searock-desktop:~$ xrandr --addmode S-video 1152x864 xrandr: cannot find output "S-video" searock@searock-desktop:~$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1360x768 59.8 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9 59.9 1152x864_60.00 (0x124) 81.0MHz h: width 1152 start 1216 end 1336 total 1520 skew 0 clock 53.3KHz v: height 864 start 867 end 871 total 897 clock 59.4Hz searock@searock-desktop:~$ xrandr --addmode VGA1 1152x864_60.00 But the problem is when ever I restart my computer I get this message. Could not apply the stored configuration for the monitors. Could not find a suitable configuration of screens. And then it comes back to 1024 x 786 My graphic card details : Intel(R) 82945G Express Chipset Family. Is there any way I can fix this once for all ? Thanks. Edit 1 : rumtscho has suggested me to modify xorg.conf file. But I am not sure what HorizSync means? is it Horizontal frequency ? My monitor model is Acer v173. Here's my specification. So what should be HorizSync and VertRefresh ? Edit 2 : I have edited my Xorg.conf file as follows : Section "Monitor" Identifier "Configured Monitor" HorizSync 30-80 VertRefresh 55-75 EndSection then I added the resolution and restarted my computer and still I am facing the same problem. Is there something that I am missing? Edit 3 : For now I have edited /etc/gdm/Init/Default(gdm startup scripts) to include following xrandr commands, just below line initctl -q emit login-session-start DISPLAY_MANAGER=gdm xrandr --newmode "1152x864_60.00" 81.75 1152 1216 1336 1520 864 867 871 897 -hsync +vsync xrandr --addmode VGA1 1152x864_60.00<br/> xrandr -s 1152x864_60.00 This has solved my problem, but this commands have increased my computer's boot time. I think I will have to edit xorg file properly. Edit 4 : Instead of adding this files to gdm startup scripts I have created a shell script and added it to startup (System - Preference - Startup Applications) #!/bin/bash xrandr --newmode "1152x864_60.00" 81.75 1152 1216 1336 1520 864 867 871 897 -hsync +vsync xrandr --addmode VGA1 1152x864_60.00 xrandr -s 1152x864_60.00 And don't forget to add execution rights. (Right Click - Properties - Permission - Allow executing file as program)

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• XmlHttpRequest bug?

  - by valdo

  Hello all. I'm writing a program that among other things needs to download a file given its URL. I'm too lazy to implement the Http/Https protocols manually, so that I needed some library/object/function that'll do the job. Critical requirement: The download must be asynchronous. That is, the thread that issued the download must be able to do something else "while" downloading the file, plus the download must be able to be aborted anytime without any barbaric side effects (such as internal call to TerminateThread). Nice-to-have requirements: Should be able to download the file "into memory". Means - read the contents of the file as they arrive, not necessarily save it into some "file system" file. It'd be nice to have some convenient Win32 progress notification mechanism (waitable event, semahpore, completion port, etc.), rather than just periodically polling the download status. I've chosen the XmlHttpRequest COM object to do the work. It seemed to work fine enough, plus it supported asynchronous mode. However I noticed that after some period it just stops working. That is, after several successful file downloads it stops downloading anything. I periodically poll it to get its status, it reports "in-progress", but nothing actually happens, and there's no network activity. Moreover, when the same process creates another instance of XmlHttpRequest object to perform new downloads - the effect is the same. The object reports "in progress", whereas it doesn't even try to connect to the server (according to network sniffers and system TCP state). The only way to make this object work back is to restart the process. This makes me suspect that there's a sort of a bug (sorry, I meant undocumented feature) in the object. Also it's not a bug at the level of an individual object, since the problem persists when the object is destroyed and another one is created. It's probably some global state of the DLL that implements this object. Does anyone know something about this? Is this a known bug? I'm pretty sure there's no chance that I have another bug in my code, because of which it seems to me to be the bug is in the XmlHttpRequest. I've done enoughtests and spent time with the debugger to conclude without reasonable doubt that it's just the object stops working. BTW, while the object should work, I do all the waiting via MsgWaitXXXX API calls. So that if this object needs the message loop to work properly (for instance, it may create a hidden notification window and bind it to a socket via WSAAsyncSelect) - I give it the opportunity.

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