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• Tomcat 7 on Ubuntu 12.04 with JRE 7 not starting

  - by Andreas Krueger

  I am running a virtual server in the web on Ubuntu 12.04 LTS / 32 Bit. After a clean install of JRE 7 and Tomcat 7, following the instructions on http://www.sysadminslife.com, I don't get Tomcat 7 up and running. > java -version java version "1.7.0_09" Java(TM) SE Runtime Environment (build 1.7.0_09-b05) Java HotSpot(TM) Client VM (build 23.5-b02, mixed mode) > /etc/init.d/tomcat start Starting Tomcat Using CATALINA_BASE: /usr/local/tomcat Using CATALINA_HOME: /usr/local/tomcat Using CATALINA_TMPDIR: /usr/local/tomcat/temp Using JRE_HOME: /usr/lib/jvm/java-7-oracle Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar > telnet localhost 8080 Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused netstat sometimes shows a Java process, most of the times not. If it does, nothing works either. Does anyone have a solution or encountered similar situations? Here are the contents of catalina.out: 16.11.2012 18:36:39 org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib/jvm/java-6-oracle/lib/i386/client:/usr/lib/jvm/java-6-oracle/lib/i386:/usr/lib/jvm/java-6-oracle/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib 16.11.2012 18:36:40 org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] 16.11.2012 18:36:40 org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] 16.11.2012 18:36:40 org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1509 ms 16.11.2012 18:36:40 org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina 16.11.2012 18:36:40 org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.29 16.11.2012 18:36:40 org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/tomcat/webapps/manager Here come the results of ps -ef, iptables --list and netstat -plut: > ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 Nov16 ? 00:00:00 init root 2 1 0 Nov16 ? 00:00:00 [kthreadd/206616] root 3 2 0 Nov16 ? 00:00:00 [khelper/2066167] root 4 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 5 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 6 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 7 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 8 2 0 Nov16 ? 00:00:00 [nfsiod/2066167] root 119 1 0 Nov16 ? 00:00:00 upstart-udev-bridge --daemon root 125 1 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 157 125 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 158 125 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 205 1 0 Nov16 ? 00:00:00 upstart-socket-bridge --daemon root 276 1 0 Nov16 ? 00:00:00 /usr/sbin/sshd -D root 335 1 0 Nov16 ? 00:00:00 /usr/sbin/xinetd -dontfork -pidfile /var/run/xinetd.pid -stayalive -inetd root 348 1 0 Nov16 ? 00:00:00 cron syslog 368 1 0 Nov16 ? 00:00:00 /sbin/syslogd -u syslog root 472 1 0 Nov16 ? 00:00:00 /usr/lib/postfix/master postfix 482 472 0 Nov16 ? 00:00:00 qmgr -l -t fifo -u root 520 1 0 Nov16 ? 00:00:04 /usr/sbin/apache2 -k start www-data 523 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start www-data 525 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start www-data 526 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start tomcat 1074 1 0 Nov16 ? 00:01:08 /usr/lib/jvm/java-6-oracle/bin/java -Djava.util.logging.config.file=/usr/ postfix 1351 472 0 Nov16 ? 00:00:00 tlsmgr -l -t unix -u -c postfix 3413 472 0 17:00 ? 00:00:00 pickup -l -t fifo -u -c root 3457 276 0 17:31 ? 00:00:00 sshd: root@pts/0 root 3459 3457 0 17:31 pts/0 00:00:00 -bash root 3470 3459 0 17:31 pts/0 00:00:00 ps -ef > iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:http-alt ACCEPT tcp -- anywhere anywhere tcp dpt:8005 ACCEPT tcp -- anywhere anywhere tcp dpt:http-alt Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination > netstat -plut Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:smtp *:* LISTEN 472/master tcp 0 0 *:3213 *:* LISTEN 276/sshd tcp6 0 0 [::]:smtp [::]:* LISTEN 472/master tcp6 0 0 [::]:8009 [::]:* LISTEN 1074/java tcp6 0 0 [::]:3213 [::]:* LISTEN 276/sshd tcp6 0 0 [::]:http-alt [::]:* LISTEN 1074/java tcp6 0 0 [::]:http [::]:* LISTEN 520/apache2

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• HttpSendRequest not getting latest file from server

  - by Doug Kavendek

  I am having an issue with my HTTP requests in my app, such that if the remote file is the same size as the local file (even though its modified time is different, as its contents have been changed), attempts to download it return quickly and the newer file is not downloaded. In short, the process I am following is: Setting up an HTTP connection with the INTERNET_FLAG_RESYNCHRONIZE flag and calling HttpSendRequest(); then checking the HTTP status code and finding it to be "200". If the remote file is updated, but remains the same size as the local copy: The local file is unchanged after running the app. If I call HttpQueryInfo() with HTTP_QUERY_LAST_MODIFIED after sending the request, it gives me the actual last modified time of the server's file, which I can see is different from the local file I am trying to have it overwrite. If the remote file is updated, and the file size becomes different from the local copy: It is downloaded and overwrites the local copy as expected. Here's a fairly abridged version of the code, to cut out helpers and error checking: // szAppName = our app name HINTERNET hInternetHandle = InternetOpen( szAppName, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0 ); // szServerName = our server name hInternetHandle = InternetConnect( hInternetHandle, szServerName, INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, NULL, 0 ); // szPath = the file to download LPCSTR aszDefault[2] = { "*/*", NULL }; DWORD dwFlags = 0 | INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTP | INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTPS | INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_AUTH | INTERNET_FLAG_NO_AUTO_REDIRECT | INTERNET_FLAG_NO_COOKIES | INTERNET_FLAG_NO_UI | INTERNET_FLAG_RESYNCHRONIZE; HINTERNET hHandle = HttpOpenRequest( hInternetHandle, "GET", szPath, NULL, NULL, aszDefault, dwFlags, 0 ); DWORD dwTimeOut = 10 * 1000; // In milliseconds InternetSetOption( hInternetHandle, INTERNET_OPTION_CONNECT_TIMEOUT, &dwTimeOut, sizeof( dwTimeOut ) ); InternetSetOption( hInternetHandle, INTERNET_OPTION_RECEIVE_TIMEOUT, &dwTimeOut, sizeof( dwTimeOut ) ); InternetSetOption( hInternetHandle, INTERNET_OPTION_SEND_TIMEOUT, &dwTimeOut, sizeof( dwTimeOut ) ); DWORD dwRetries = 5; InternetSetOption( hInternetHandle, INTERNET_OPTION_CONNECT_RETRIES, &dwRetries, sizeof( dwRetries ) ); HttpSendRequest( hInternetHandle, NULL, 0, NULL, 0 ); Since I have found I can query the remote file's last modified time, and find it to be accurate, I know it's actually getting to the server. I thought that specifying INTERNET_FLAG_RESYNCHRONIZE would force the file to resynch if it's out of date. Do I have it all wrong? Is this just how it's supposed to work?

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• django+mod_wsgi on virtualenv not working

  - by jwesonga

  I've just finished setting up a django app on virtualenv, deployment went smoothly using a fabric script, but now the .wsgi is not working, I've tried every variation on the internet but no luck. My .wsgi file is: import os import sys import django.core.handlers.wsgi # put the Django project on sys.path root_path = os.path.abspath(os.path.dirname(__file__) + '../') sys.path.insert(0, os.path.join(root_path, 'kcdf')) sys.path.insert(0, root_path) os.environ['DJANGO_SETTINGS_MODULE'] = 'kcdf.settings' application = django.core.handlers.wsgi.WSGIHandler() I keep getting the same error: [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] mod_wsgi (pid=16938): Exception occurred processing WSGI script '/home/kcdfweb/webapps/kcdf.web/releases/current/kcdf/apache/kcdf.wsgi'. [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] Traceback (most recent call last): [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/wsgi.py", line 230, in __call__ [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] self.load_middleware() [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py", line 33, in load_middleware [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] for middleware_path in settings.MIDDLEWARE_CLASSES: [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] File "/usr/local/lib/python2.6/dist-packages/django/utils/functional.py", line 269, in __getattr__ [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] self._setup() [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] File "/usr/local/lib/python2.6/dist-packages/django/conf/__init__.py", line 40, in _setup [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] self._wrapped = Settings(settings_module) [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] File "/usr/local/lib/python2.6/dist-packages/django/conf/__init__.py", line 75, in __init__ [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] raise ImportError, "Could not import settings '%s' (Is it on sys.path? Does it have syntax errors?): %s" % (self.SETTINGS_MODULE, e) [Sun Apr 18 12:44:30 2010] [error] [client 41.215.123.159] ImportError: Could not import settings 'kcdf.settings' (Is it on sys.path? Does it have syntax errors?): No module named kcdf.settings my virtual environment is on /home/user/webapps/kcdfweb my app is /home/user/webapps/kcdf.web/releases/current/project_name my wsgi file home/user/webapps/kcdf.web/releases/current/project_name/apache/project_name.wsgi

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• mod_wsgi | linux installation error

  - by MMRUser

  I'm getting the following error when I try to install mod_wsgi ./configure checking for apxs2... no checking for apxs... /usr/sbin/apxs checking Apache version... 2.2.3 configure: creating ./config.status config.status: creating Makefile make /usr/sbin/apxs -c -I/usr/local/include/python2.6 -DNDEBUG mod_wsgi.c -L/usr/local/lib -L/usr/local/lib/python2.6/config -lpython2.6 -lpthread -ldl -lutil -lm /apr-1/build/libtool --silent --mode=compile gcc -prefer-pic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables -fno-strict-aliasing -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -pthread -I/usr/include/httpd -I/usr/include/apr-1 -I/usr/include/apr-1 -I/usr/local/include/python2.6 -DNDEBUG -c -o mod_wsgi.lo mod_wsgi.c && touch mod_wsgi.slo sh: /apr-1/build/libtool: No such file or directory apxs:Error: Command failed with rc=8323072 . make: *** [mod_wsgi.la] Error 1 libtool is installed on my system.. mod_wsgi 3.2 *Apache 2.2* *Python 2.6*

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• python-iptables: Cryptic error when allowing incoming TCP traffic on port 1234

  - by Lucas Kauffman

  I wanted to write an iptables script in Python. Rather than calling iptables itself I wanted to use the python-iptables package. However I'm having a hard time getting some basic rules setup. I wanted to use the filter chain to accept incoming TCP traffic on port 1234. So I wrote this: import iptc chain = iptc.Chain(iptc.TABLE_FILTER,"INPUT") rule = iptc.Rule() target = iptc.Target(rule,"ACCEPT") match = iptc.Match(rule,'tcp') match.dport='1234' rule.add_match(match) rule.target = target chain.insert_rule(rule) However when I run this I get this thrown back at me: Traceback (most recent call last): File "testing.py", line 9, in <module> chain.insert_rule(rule) File "/usr/local/lib/python2.6/dist-packages/iptc/__init__.py", line 1133, in insert_rule self.table.insert_entry(self.name, rbuf, position) File "/usr/local/lib/python2.6/dist-packages/iptc/__init__.py", line 1166, in new obj.refresh() File "/usr/local/lib/python2.6/dist-packages/iptc/__init__.py", line 1230, in refresh self._free() File "/usr/local/lib/python2.6/dist-packages/iptc/__init__.py", line 1224, in _free self.commit() File "/usr/local/lib/python2.6/dist-packages/iptc/__init__.py", line 1219, in commit raise IPTCError("can't commit: %s" % (self.strerror())) iptc.IPTCError: can't commit: Invalid argument Exception AttributeError: "'NoneType' object has no attribute 'get_errno'" in <bound method Table.__del__ of <iptc.Table object at 0x7fcad56cc550>> ignored Does anyone have experience with python-iptables that could enlighten on what I did wrong?

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• Is it possible to use Google Gears inside of another Firefox extension?

  - by Dmitry Nedbaylo

  Basically, i want to implement Offline/Online XUL application with ability to upload data to server. Yes, i know there is Mozilla Storage API, but it looks like it is much more easier with Gears to have local database and to upload local changes to server using WorkerPool. Without Gears, i have no ideas how to upload local changes to remote server. Any thoughts, friends? Thanks in advance for any help.

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• Why so Long time span in creating Session Factory?

  - by vijay.shad

  Hi My project is web application running in the tomcat container. This application is a spring framework based hibernate application. The problem with this is it takes a lot of time when creates session factory. here is the logs 2010-04-15 23:05:28,053 DEBUG [SessionFactoryImpl] Session factory constructed with filter configurations : {} 2010-04-15 23:05:28,053 DEBUG [SessionFactoryImpl] instantiating session factory with properties: {java.vendor=Sun Microsystems Inc., sun.java.launcher=SUN_STANDARD, catalina.base=/usr/local/InstalledPrograms/apache-tomcat-6.0.20, sun.management.compiler=HotSpot Tiered Compilers, catalina.useNaming=true, os.name=Linux, sun.boot.class.path=/usr/java/jdk1.6.0_17/jre/lib/resources.jar:/usr/java/jdk1.6.0_17/jre/lib/rt.jar:/usr/java/jdk1.6.0_17/jre/lib/sunrsasign.jar:/usr/java/jdk1.6.0_17/jre/lib/jsse.jar:/usr/java/jdk1.6.0_17/jre/lib/jce.jar:/usr/java/jdk1.6.0_17/jre/lib/charsets.jar:/usr/java/jdk1.6.0_17/jre/classes, java.util.logging.config.file=/usr/local/InstalledPrograms/apache-tomcat-6.0.20/conf/logging.properties, java.vm.specification.vendor=Sun Microsystems Inc., hibernate.generate_statistics=true, java.runtime.version=1.6.0_17-b04, hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider, user.name=root, shared.loader=, tomcat.util.buf.StringCache.byte.enabled=true, hibernate.connection.release_mode=auto, user.language=en, java.naming.factory.initial=org.apache.naming.java.javaURLContextFactory, sun.boot.library.path=/usr/java/jdk1.6.0_17/jre/lib/i386, java.version=1.6.0_17, java.util.logging.manager=org.apache.juli.ClassLoaderLogManager, user.timezone=Canada/Pacific, sun.arch.data.model=32, java.endorsed.dirs=/usr/local/InstalledPrograms/apache-tomcat-6.0.20/endorsed, sun.cpu.isalist=, sun.jnu.encoding=UTF-8, file.encoding.pkg=sun.io, package.access=sun.,org.apache.catalina.,org.apache.coyote.,org.apache.tomcat.,org.apache.jasper.,sun.beans., file.separator=/, java.specification.name=Java Platform API Specification, java.class.version=50.0, user.country=US, java.home=/usr/java/jdk1.6.0_17/jre, java.vm.info=mixed mode, os.version=2.6.18-128.el5, path.separator=:, java.vm.version=14.3-b01, hibernate.jdbc.batch_size=25, java.awt.printerjob=sun.print.PSPrinterJob, sun.io.unicode.encoding=UnicodeLittle, package.definition=sun.,java.,org.apache.catalina.,org.apache.coyote.,org.apache.tomcat.,org.apache.jasper., java.naming.factory.url.pkgs=org.apache.naming, sun.rmi.dgc.client.gcInterval=3600000, user.home=/root, java.specification.vendor=Sun Microsystems Inc., java.library.path=/usr/java/jdk1.6.0_17/jre/lib/i386/server:/usr/java/jdk1.6.0_17/jre/lib/i386:/usr/java/jdk1.6.0_17/jre/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib, java.vendor.url=http://java.sun.com/, java.vm.vendor=Sun Microsystems Inc., hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect, sun.rmi.dgc.server.gcInterval=3600000, common.loader=${catalina.home}/lib,${catalina.home}/lib/*.jar, java.runtime.name=Java(TM) SE Runtime Environment, java.class.path=:/usr/local/InstalledPrograms/apache-tomcat-6.0.20/bin/bootstrap.jar, hibernate.bytecode.use_reflection_optimizer=false, java.vm.specification.name=Java Virtual Machine Specification, java.vm.specification.version=1.0, catalina.home=/usr/local/InstalledPrograms/apache-tomcat-6.0.20, sun.cpu.endian=little, sun.os.patch.level=unknown, hibernate.cache.use_query_cache=true, hibernate.connection.provider_class=org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider, java.io.tmpdir=/usr/local/InstalledPrograms/apache-tomcat-6.0.20/temp, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, server.loader=, os.arch=i386, java.awt.graphicsenv=sun.awt.X11GraphicsEnvironment, java.ext.dirs=/usr/java/jdk1.6.0_17/jre/lib/ext:/usr/java/packages/lib/ext, user.dir=/, line.separator=, java.vm.name=Java HotSpot(TM) Server VM, hibernate.cache.use_second_level_cache=true, file.encoding=UTF-8, java.specification.version=1.6, hibernate.show_sql=true} 2010-04-15 23:08:53,516 DEBUG [AbstractEntityPersister] Static SQL for entity: com.vsd.model.Order There you can see the time delay of more than 3 mins in executing these processes. My database is mysql and database server is running on the local machine only. The container environment is Centos Linux system. I am clueless about why it takes that much of time in executing these process, But when i do the same task from under eclipse it does not take that much of time. Development environment is Windows.

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• changing default my.cnf path in mysql

  - by user377941

  I am having two mysql instances on same machine. The installations are on /usr/loca/mysql1 and /usr/local/mysql2. I m having separate my.cnf files located in /etc/mysql1 and /etc/mysql2. I installed the first instance of my sql using source distribution and with the --prefix=/usr/local/mysql1 option. The second one i got from copying and pastinf the same directory to /usr/local/mysql2. When i start the mysql daemon on /usr.local/mysql/libexec it reads the my.cnf file in /etc/mysql1. And if i start the mysql daemon in /usr/local/mysql2 it reads the same my.cnf file. I have separate port numbers and .sock files defined in the .cnf file in those 2 locations. I can read the my.cnf file in the second location by using --defaults-file=/etc/mysql2/my.cnf option on mysqld startup. I dnt need to enter this each and every time i start the daemon. If i am going to have more instances how can i point the correct my.cnf file to read to each and every mysql daemon. What is the retionale behind mysqld links with the my.cnf file. how can i predefine the location of my.cnf file for each instance.

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• Error trying to run rails server

  - by David87

  I am trying to get a basic Rails application to run on my Mac OS X 10.6.5. I created a new app called demo (rails new demo), then went into the demo directory and tried to start the app with rails server. Here is the error message I received: "/Users/dpetrovi/.gem/ruby/1.8/gems/sqlite3-ruby-1.3.2/lib/sqlite3/sqlite3_native.bundle: [BUG] Segmentation fault ruby 1.8.7 (2010-12-23 patchlevel 330) [i686-darwin10] Abort trap" I checked bundle install in the demo folder: "Using rake (0.8.7) Using abstract (1.0.0) Using activesupport (3.0.3) Using builder (2.1.2) Using i18n (0.5.0) Using activemodel (3.0.3) Using erubis (2.6.6) Using rack (1.2.1) Using rack-mount (0.6.13) Using rack-test (0.5.6) Using tzinfo (0.3.23) Using actionpack (3.0.3) Using mime-types (1.16) Using polyglot (0.3.1) Using treetop (1.4.9) Using mail (2.2.13) Using actionmailer (3.0.3) Using arel (2.0.6) Using activerecord (3.0.3) Using activeresource (3.0.3) Using bundler (1.0.7) Using thor (0.14.6) Using railties (3.0.3) Using rails (3.0.3) Using sqlite3-ruby (1.3.2) Your bundle is complete! Use bundle show [gemname] to see where a bundled gem is installed." Ruby, RubyGems, and sqlite3 were installed using MacPorts. Then I used gem to try to install the sqlite3-ruby interface. (sudo gem install sqlite3-ruby). Here is where I first noticed something could be off: "Successfully installed sqlite3-ruby-1.3.2 1 gem installed Installing ri documentation for sqlite3-ruby-1.3.2... No definition for libversion Enclosing class/module 'mSqlite3' for class Statement not known Installing RDoc documentation for sqlite3-ruby-1.3.2... No definition for libversion Enclosing class/module 'mSqlite3' for class Statement not known " I had rails running well on my system a few months ago, so I figured maybe I had some duplicates and it was trying to use the wrong one. I ran: "for cmd in ruby irb gem rake; do which $cmd; done" and got: "/opt/local/bin/ruby /opt/local/bin/irb /opt/local/bin/gem /opt/local/bin/rake" Checking where sqlite3 also gets me: "/opt/local/bin/sqlite3" so they all seem to be in the right place. Obviously /opt/local/bin is in my system path. If I check gems server, it shows that I have installed sqlite3-ruby 1.3.2 gem. Not sure what the problem could be? I am using ruby 1.8.7 (2010-12-23 patchlevel 330) [i686-darwin10]. Macports claims this is the latest (although ive seen 1.9.1) One more thing-- in irb, I tried to check which version of sqlite3 my sqlite3-ruby is bound to, but I can only get this far: ":irb(main):001:0 require 'rubygems' = true irb(main):002:0 require 'sqlite3' /Users/dpetrovi/.gem/ruby/1.8/gems/sqlite3-ruby-1.3.2/lib/sqlite3/sqlite3_native.bundle: [BUG] Segmentation fault ruby 1.8.7 (2010-12-23 patchlevel 330) [i686-darwin10] Abort trap" Any suggestions? Im hoping I overlooked something obvious. Thanks

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• invalid option: --autospec

  - by ramonrails

  /usr/local/bin/ruby -rrubygems -e "require 'redgreen'" /usr/local/lib/ruby/gems/1.8/gems/rspec-1.3.0/bin/spec --autospec

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• data directory in automake

  - by Alex Farber

  I have some data files that should be distributed with my program. Using dist_pkgdata_DATA in Makefile.am, I get these files installed to /usr/local/data/share/package-name. The problem is that data is read-only, and my program needs to modify it. Playing with dist_sharedstate_DATA, dist_localstate_DATA, dist-data_DATA varibles, I got different installation directories, like /usr/local/com, usr/local/var, but data is always read-only. How can I distribute modifiable data files with my package? I need some common directory for all users, or maybe local data in a user directory.

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• Oracle Linux Tips and Tricks: Using SSH

  - by Robert Chase

  Out of all of the utilities available to systems administrators ssh is probably the most useful of them all. Not only does it allow you to log into systems securely, but it can also be used to copy files, tunnel IP traffic and run remote commands on distant servers. It’s truly the Swiss army knife of systems administration. Secure Shell, also known as ssh, was developed in 1995 by Tau Ylonen after the University of Technology in Finland suffered a password sniffing attack. Back then it was common to use tools like rcp, rsh, ftp and telnet to connect to systems and move files across the network. The main problem with these tools is they provide no security and transmitted data in plain text including sensitive login credentials. SSH provides this security by encrypting all traffic transmitted over the wire to protect from password sniffing attacks. One of the more common use cases involving SSH is found when using scp. Secure Copy (scp) transmits data between hosts using SSH and allows you to easily copy all types of files. The syntax for the scp command is: scp /pathlocal/filenamelocal remoteuser@remotehost:/pathremote/filenameremote In the following simple example, I move a file named myfile from the system test1 to the system test2. I am prompted to provide valid user credentials for the remote host before the transfer will proceed.  If I were only using ftp, this information would be unencrypted as it went across the wire.  However, because scp uses SSH, my user credentials and the file and its contents are confidential and remain secure throughout the transfer.  [user1@test1 ~]# scp /home/user1/myfile user1@test2:/home/user1user1@test2's password: myfile                                    100%    0     0.0KB/s   00:00 You can also use ssh to send network traffic and utilize the encryption built into ssh to protect traffic over the wire. This is known as an ssh tunnel. In order to utilize this feature, the server that you intend to connect to (the remote system) must have TCP forwarding enabled within the sshd configuraton. To enable TCP forwarding on the remote system, make sure AllowTCPForwarding is set to yes and enabled in the /etc/ssh/sshd_conf file: AllowTcpForwarding yes Once you have this configured, you can connect to the server and setup a local port which you can direct traffic to that will go over the secure tunnel. The following command will setup a tunnel on port 8989 on your local system. You can then redirect a web browser to use this local port, allowing the traffic to go through the encrypted tunnel to the remote system. It is important to select a local port that is not being used by a service and is not restricted by firewall rules.  In the following example the -D specifies a local dynamic application level port forwarding and the -N specifies not to execute a remote command.   ssh –D 8989 [email protected] -N You can also forward specific ports on both the local and remote host. The following example will setup a port forward on port 8080 and forward it to port 80 on the remote machine. ssh -L 8080:farwebserver.com:80 [email protected] You can even run remote commands via ssh which is quite useful for scripting or remote system administration tasks. The following example shows how to  log in remotely and execute the command ls –la in the home directory of the machine. Because ssh encrypts the traffic, the login credentials and output of the command are completely protected while they travel over the wire. [rchase@test1 ~]$ ssh rchase@test2 'ls -la'rchase@test2's password: total 24drwx------  2 rchase rchase 4096 Sep  6 15:17 .drwxr-xr-x. 3 root   root   4096 Sep  6 15:16 ..-rw-------  1 rchase rchase   12 Sep  6 15:17 .bash_history-rw-r--r--  1 rchase rchase   18 Dec 20  2012 .bash_logout-rw-r--r--  1 rchase rchase  176 Dec 20  2012 .bash_profile-rw-r--r--  1 rchase rchase  124 Dec 20  2012 .bashrc You can execute any command contained in the quotations marks as long as you have permission with the user account that you are using to log in. This can be very powerful and useful for collecting information for reports, remote controlling systems and performing systems administration tasks using shell scripts. To make your shell scripts even more useful and to automate logins you can use ssh keys for running commands remotely and securely without the need to enter a password. You can accomplish this with key based authentication. The first step in setting up key based authentication is to generate a public key for the system that you wish to log in from. In the following example you are generating a ssh key on a test system. In case you are wondering, this key was generated on a test VM that was destroyed after this article. [rchase@test1 .ssh]$ ssh-keygen -t rsaGenerating public/private rsa key pair.Enter file in which to save the key (/home/rchase/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/rchase/.ssh/id_rsa.Your public key has been saved in /home/rchase/.ssh/id_rsa.pub.The key fingerprint is:7a:8e:86:ef:59:70:ef:43:b7:ee:33:03:6e:6f:69:e8 rchase@test1The key's randomart image is:+--[ RSA 2048]----+|                 ||  . .            ||   o .           ||    . o o        ||   o o oS+       ||  +   o.= =      ||   o ..o.+ =     ||    . .+. =      ||     ...Eo       |+-----------------+ Now that you have the key generated on the local system you should to copy it to the target server into a temporary location. The user’s home directory is fine for this. [rchase@test1 .ssh]$ scp id_rsa.pub rchase@test2:/home/rchaserchase@test2's password: id_rsa.pub                  Now that the file has been copied to the server, you need to append it to the authorized_keys file. This should be appended to the end of the file in the event that there are other authorized keys on the system. [rchase@test2 ~]$ cat id_rsa.pub >> .ssh/authorized_keys Once the process is complete you are ready to login. Since you are using key based authentication you are not prompted for a password when logging into the system.   [rchase@test1 ~]$ ssh test2Last login: Fri Sep  6 17:42:02 2013 from test1 This makes it much easier to run remote commands. Here’s an example of the remote command from earlier. With no password it’s almost as if the command ran locally. [rchase@test1 ~]$ ssh test2 'ls -la'total 32drwx------  3 rchase rchase 4096 Sep  6 17:40 .drwxr-xr-x. 3 root   root   4096 Sep  6 15:16 ..-rw-------  1 rchase rchase   12 Sep  6 15:17 .bash_history-rw-r--r--  1 rchase rchase   18 Dec 20  2012 .bash_logout-rw-r--r--  1 rchase rchase  176 Dec 20  2012 .bash_profile-rw-r--r--  1 rchase rchase  124 Dec 20  2012 .bashrc As a security consideration it's important to note the permissions of .ssh and the authorized_keys file.  .ssh should be 700 and authorized_keys should be set to 600.  This prevents unauthorized access to ssh keys from other users on the system.   An even easier way to move keys back and forth is to use ssh-copy-id. Instead of copying the file and appending it manually to the authorized_keys file, ssh-copy-id does both steps at once for you.  Here’s an example of moving the same key using ssh-copy-id.The –i in the example is so that we can specify the path to the id file, which in this case is /home/rchase/.ssh/id_rsa.pub [rchase@test1]$ ssh-copy-id -i /home/rchase/.ssh/id_rsa.pub rchase@test2 One of the last tips that I will cover is the ssh config file. By using the ssh config file you can setup host aliases to make logins to hosts with odd ports or long hostnames much easier and simpler to remember. Here’s an example entry in our .ssh/config file. Host dev1 Hostname somereallylonghostname.somereallylongdomain.com Port 28372 User somereallylongusername12345678 Let’s compare the login process between the two. Which would you want to type and remember? ssh somereallylongusername12345678@ somereallylonghostname.somereallylongdomain.com –p 28372 ssh dev1 I hope you find these tips useful.  There are a number of tools used by system administrators to streamline processes and simplify workflows and whether you are new to Linux or a longtime user, I'm sure you will agree that SSH offers useful features that can be used every day.  Send me your comments and let us know the ways you  use SSH with Linux.  If you have other tools you would like to see covered in a similar post, send in your suggestions.

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• What permissions needed to connect to SQL Server Integration Services

  - by rwmnau

  I need to allow a consultant to connect to SSIS on a SQL Server 2008 box without making him a local administrator. If I add him to the local administrators group, he can connect to SSIS just fine, but it seems that I can't grant him enough permissions through SQL Server to give him these rights without being a local admin. I've added him to every role on the server, every database role in MSDB shy of DBO, and he's still not able to connect. I don't see any SSIS-related Windows groups on the server - Is membership in the Local Administrators group really required to connect to the SSIS instance on a SQL Server? It seems like there is somewhere I should be able to grant "SSIS Admin" rights to a user (even if it's a Windows account and not a SQL account), but I can't find that place. UPDATE: I've found an MSDN article (See the section titled "Eliminating the 'Access if Denied' Error") that describes how to resolve problem, but even after following the stepsI'm still not able to connect. Just wanted to add it to the discussion

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• How to add the ImageMagick install to my path on Ubuntu

  - by Josh

  I have had been on a roller coaster trying to get ImageMagick to work on my Ubuntu slice. I Whenever I try to upload an image I get the following error: /tmp/stream.1170.0 is not recognized by the 'identify' command. If I type 'which identify' I get: /usr/local/bin/identify If I run '/usr/local/bin/identify' or just 'identify', I get the following error: /usr/local/bin/identify: error while loading shared libraries: libMagickCore.so.3: cannot open shared object file: No such file or directory If I run '/usr/bin/identify', ImageMagick is run just fine. How can I set my path to where when Paperclip runs the identify command, it points to /usr/bin/identify? Thanks. p.s. I have tried adding this to paperclip.rb: Paperclip.options[:command_path] = '/usr/bin' and Paperclip.options[:command_path] = '/usr/local/bin'

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• Curious about python installation paths, especially on OSX.

  - by chiggsy

  First: I'm running Macports. No problems with that, except: /opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin which is the value of sys.exec_prefix, for my macports python even though: /opt/local/lib/python2.6/site-packages/ seems to be quite a logical place to put things, /opt/local being the macports --prefix, as it were. Why does easy_install put things in this odd Frameworks/Python.framework thing? More importantly, can i use the methods here, to ensure that all my systemwide python, particularly the scripts which I really want in /opt/local/bin, things I use all over the place like (i|b)python for example are accessible?

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• Stata Nearest neighbor of percentile

  - by Kyle Billings

  This has probably already been answered, but I must just be searching for the wrong terms. Suppose I am using the built in Stata data set auto: sysuse auto, clear and say for example I am working with 1 independent and 1 dependent variable and I want to essentially compress down to the IQR elements, min, p(25), median, p(75), max... so I use command, keep weight mpg sum weight, detail return list local min=r(min) local lqr=r(p25) local med = r(p50) local uqr = r(p75) local max = r(max) keep if weight==`min' | weight==`max' | weight==`med' | weight==`lqr' | weight==`uqr' Hence, I want to compress the data set down to only those 5 observations, and for example in this situation the median is not actually an element of the weight vector. there is an observation above and an observation below (due to the definition of median this is no surprise). is there a way that I can tell stata to look for the nearest neighbor above the percentile. ie. if r(p50) is not an element of weight then search above that value for the next observation? The end result is I am trying to get the data down to 2 vectors, say weight and mpg such that for each of the 5 elements of weight in the IQR have their matching response in mpg. Any thoughts?

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• g++ Linking Error on Mac while compiling FFMPEG

  - by Saptarshi Biswas

  g++ on Snow Leopard is throwing linking errors on the following piece of code test.cpp #include <iostream> using namespace std; #include <libavcodec/avcodec.h> // required headers #include <libavformat/avformat.h> int main(int argc, char**argv) { av_register_all(); // offending library call return 0; } When I try to compile this using the following command g++ test.cpp -I/usr/local/include -L/usr/local/lib \ -lavcodec -lavformat -lavutil -lz -lm -o test I get the error Undefined symbols: "av_register_all()", referenced from: _main in ccUD1ueX.o ld: symbol(s) not found collect2: ld returned 1 exit status Interestingly, if I have an equivalent c code, test.c #include <stdio.h> #include <libavcodec/avcodec.h> #include <libavformat/avformat.h> int main(int argc, char**argv) { av_register_all(); return 0; } gcc compiles it just fine gcc test.c -I/usr/local/include -L/usr/local/lib \ -lavcodec -lavformat -lavutil -lz -lm -o test I am using Mac OS X 10.6.5 $ g++ --version i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664) $ gcc --version i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664) FFMPEG's libavcodec, libavformat etc. are C libraries and I have built them on my machine like thus: ./configure --enable-gpl --enable-pthreads --enable-shared \ --disable-doc --enable-libx264 make && sudo make install As one would expect, libavformat indeed contains the symbol av_register_all $ nm /usr/local/lib/libavformat.a | grep av_register_all 0000000000000000 T _av_register_all 00000000000089b0 S _av_register_all.eh I am inclined to believe g++ and gcc have different views of the libraries on my machine. g++ is not able to pick up the right libraries. Any clue?

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• clear command in my mac os terminal gives the following error

  - by sil

  dyld: Library not loaded: /opt/local/lib/libncursesw.5.dylib Referenced from: /opt/local/bin/clear Reason: image not found Trace/BPT trap

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• Why is lua crashing after extracting zip files?

  - by Brian T Hannan

  I have the following code but it crashes every time it reaches the end of the function, but it successfully extracts all the files and puts them in the right location. require "zip" function ExtractZipAndCopyFiles(zipPath, zipFilename, destinationPath) local zfile, err = zip.open(zipPath .. zipFilename) -- iterate through each file insize the zip file for file in zfile:files() do local currFile, err = zfile:open(file.filename) local currFileContents = currFile:read("*a") -- read entire contents of current file local hBinaryOutput = io.open(destinationPath .. file.filename, "wb") -- write current file inside zip to a file outside zip if(hBinaryOutput)then hBinaryOutput:write(currFileContents) hBinaryOutput:close() end end zfile:close() end -- call the function ExtractZipAndCopyFiles("C:\\Users\\bhannan\\Desktop\\LUA\\", "example.zip", "C:\\Users\\bhannan\\Desktop\\ZipExtractionOutput\\") Why does it crash every time it reaches the end?

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• mysql5.58 unstart server in mac os 10.6.5

  - by EdwardLau

  MySQL 5.5.8 uninstall MAC OS 10.6.5,restart computer is message “/Library/StartupItems/MySQLCOM” has not been started because it does not have the proper security settings. i set sudo /Applications/TextEdit.app/Contents/MacOS/TextEdit /usr/local/mysql/support-files/mysql.server Locate the configuration defining the basedir and set the following : basedir=/usr/local/mysql datadir=/usr/local/mysql/data bug i click the mysql preference start mysql server isn't start and i sudo chown -R root:wheel /Library/StartupItems/MySQLCOM and restart again ,not warning message but mysql server not start ,why?

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• Keeping a large volume of data in Session - Suggestions / alternatives?

  - by Fishcake

  I'm developing a web app for which the client wants us to query their data as little as possible. The data will be coming from a Microsoft CRM instance. So we've agreed that data will only be queried as and when it is needed, therefore if a web user wants to see a list of contacts (for example) that list is fetched into a local DataTable. Then if a new contact is created on the website the new contact is sent to CRM and added to the local DataTable at the same time. Likewise for edits. If the user then looks at their contacts again the data will just come from the local DataTable. At the moment local data is being kept in Session but my concern is that too much memory will start being used up. However traffic is expected to be pretty small, perhaps no more than 20 concurrent users so am I worrying about nothing or is there a better way you can suggest to handle this?

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• gem install cannot find a header file

  - by Milktrader

  Following along the github README for talib_ruby: sudo port install ta-lib Complete. Next is where the trouble begins. sudo env ARCHFLAGS="-arch PLATFORM" gem install talib_ruby -- --with-talib-include=ABSOLUTE_PATH_TO_TALIB_HEADERS --with-talib-lib=ABSOLUTE_PATH_TO_TALIB_LIBS This install fails I believe because apparently it cannot find the ta_abstract.h file talib.c:2:25: error: ta_abstract.h: No such file or directory . . . many more errors I have included in my .bash_profile file the following: export ABSOLUTE_PATH_TO_TALIB_HEADERS=/opt/local/var/macports/software/ta-lib/0.4.0_0/opt/local/include/ta-lib export ABSOLUTE_PATH_TO_TALIB_LIBS=/opt/local/var/macports/software/ta-lib/0.4.0_0/opt/local/lib And indeed the ta_abstract.h file is located where I'm saying in the ABSOLUTE_PATH variable assignment. What gives?

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• Unable to connect to sql database only from asp

  - by Brian

  In a VB6 program: Dim conn As Object Set conn = CreateObject("ADODB.Connection") conn.Open "DRIVER={SQL Server}; Server=(local)\aaa; Database=bbb; UID=ccc; PWD=ddd" In an ASP program: Sub ProcessSqlServer(conn) Set conn = Server.CreateObject("ADODB.Connection") conn.Open "DRIVER={SQL Server}; Server=(local)\aaa; Database=bbb; UID=ccc; PWD=ddd" The VB6 program works, the ASP program does not (see error below). I tried checking the event log for errors, but found nothing. Or more precisely, I did find local an activation permission error, but this was fixed once I added local launch/activation permission for Network Service to the Machine Debug Manager via the component services tool. Error: Microsoft OLE DB Provider for ODBC Drivers error '80004005' [Microsoft][ODBC SQL Server Driver]Timeout expired

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• is there something analogous to Connect.registerUsers in the Graph API

  - by timpone

  I am trying to figure this out. Basically, I'd like to reconcile my local emails with a users list of friends. I can see after OAuth token is established that I can get a list of users friends via http://graph.facebook.com/me/friends Would the solution be to keep track of a list of users friends over time and then reconcile with our local ids (in other words, i can know my id) and then use the friends API call to see if your friends are the same in local db?

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• Can I have two different Styles in a CustomControl

  - by Subhen

  Hi, Can we have two different styles in generic.xaml setter template Property Something like: <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="local:customLocalFolderButton"> **<----Style 1---->** </ControlTemplate TargetType="local:customLocalFolderButton"> </Setter.Value> <Setter.Value> <ControlTemplate TargetType="local:customLocalFolderButton"> **<----Style 2---->** </ControlTemplate TargetType="local:customLocalFolderButton"> </Setter.Value> </Setter> Now I want to load the styles , as per the requirement. The 1st Style Can have a Red Folder and the Second Style Can have Blue Folder . The user can choose any of the theme and the choosen style(Either RedFolder or Blue) should be applied in the customControl it self. Thanks, Subhen

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