Runlevels in Red Hat Enterprise Linux

Table 9.1. Runlevels in Red Hat Enterprise Linux

Runlevel	Description
0	Used to halt the system. This runlevel is reserved and cannot be changed.
1	Used to run in a single-user mode. This runlevel is reserved and cannot be changed.
2	Not used by default. You are free to define it yourself.
3	Used to run in a full multi-user mode with a command line user interface.
4	Not used by default. You are free to define it yourself.
5	Used to run in a full multi-user mode with a graphical user interface.
6	Used to reboot the system. This runlevel is reserved and cannot be changed.

PhalconPHP: A PHP Framework as an Extension

PhalconPHP is a web framework delivered as a C extension providing high performance and lower resource consumption.

Install it is easy if you have experience building PHP. There is a port for FreeBSD if you disagree compilations :)

In this post: Instal·lant una màquina blava - 4) PHP 5.4 you can view the apt-get install's mandatory to build PHP and other extensions.

The requirements are : sudo apt-get install php5-dev php5-mysql gcc make

As explained in the README file: Follow these instructions to generate a binary extension for your platform: git clone git://github.com/phalcon/cphalcon.git cd cphalcon/build export CFLAGS="-O2 -fno-delete-null-pointer-checks" phpize --clean phpize ./configure --enable-phalcon make sudo make install Add extension to your php.ini extension=phalcon.so Finally restart the webserver

To test it, you can install an example app: INVO https://github.com/phalcon/invo cd /var/www git clone git://github.com/phalcon/invo.git cd invo echo 'CREATE DATABASE invo' | mysql -u root -p cat schemas/invo.sql | mysql -u root -p invo vi app/config/config.ini [database] host = localhost username = root password = ***** name = invo

Really fast! Are good news

PHP as universal communication language in business and production processes

Darrerament s'ha publicat un webminar a la secció IBM i de Zend sobre l'adopció de PHP com a llenguatge de propòsit general per a la gestió de negocis i producció.

Es tracta de la implementació d'un ERP escrit en PHP per a Aalberts Industries.

Resulta força interessant l'arquitectura desplegada per integrar l'ERP i el MES amb la producció, tot en PHP amb algunes crides RPG a codi legacy.

L'ERP s'executa sobre l'IBM i i el MES sobre una Debian. El MES requeria accés des de fora de la companyia i interconnexió amb tota la maquinaria de la fàbrica.

Les conclusions resulten força interessants:


• PHP is a universal platform independend programming language
• It’s fast and comprehensive
• Beside WEB programming it can be used for interfaces and processes
• Even real time data analysis is possible
• Zend Server provides the same environment on all platforms
• It’s easy to develop, to trace and to maintain
• It makes fun and provides fast success

Podeu veure aquesta presentació en aquest enllaç

http://static.zend.com/topics/GroupMT-PHP-20120919.pdf