Oct 292012
 

Multitasking refers to the ability to perform several different activities at the same time in a single Linux computing environment. Many jobs that we perform in our day to day duties when running a Linux system can be performed sequentially, that is, one after the other. Jobs that can be run in a very short amount of time or that require an intense period of resource usage that needs to run as a single large process using all computing resources can be run one after another without the need for multitasking. Jobs that are particularly long running that run on a different computer or several different computers even, such as in a grid environment, are good candidates for multitasking. Defragmenting your disk drive or running a search for a particular query string on your local hard drive are examples of long running local jobs that can be multitasked while running other tasks. Jobs such as long database queries or batch loads onto a remote server are examples of jobs that are controlled in a single session, but can be multitasked in a Linux environment so several of these sessions can be run at the same time.
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Oct 272012
 

Sometimes it’s useful to tell to our GNU/Linux system that we want to keep some packages on Hold or that we do not want to update them , for example you could have added a custom kernel and you don’t want that during an update the standard kernel takes its place, or perhaps you want to test some specific version.

These instructions are tested with distributions that use packages in the .deb format (such as Debian, Ubuntu and Mint), .rpm based distributions that use yum (Red Hat Enterprise, Centos, Fedora) and Gentoo.
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Oct 252012
 

This is an article of mine first published on Wazi

The mod_jk connector serves as the glue between the Apache HTTP server and a Java application server such as Tomcat or JBoss. While most adminstrators concentrate on optimizing Apache or the Java server, setting up mod_jk optimally can also improve your users’ experience.

To be precise, mod_jk connects the Apache web server to the AJP port of a Java server. Apache Jserv Protocol is a binary version of HTTP that is optimized for communication over TCP between the Apache HTTP server and Apache Tomcat or other software.

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Oct 202012
 

Over the past few years, Global Positioning Tracking System (GPS) applications have become extremely popular among automobile consumers and in fact anyone who drives a vehicle on a regular basis probably use them. So much so that many car manufacturers offer GPS capabilities built directly into their cars. Mobile device providers have also found themselves competing with each other over their location aware applications using GPS technology. While there are several applications on the market that offer functionality for individual consumers, there is not a lot available for companies or small business owners who need to manage several vehicles at once from a central location.

The Open GTS (Open GPS Tracking System) Project is an open source project developing the Open GTS application, focusing on a GPS application specifically built for managing fleets of vehicles for small businesses. Fleet vehicles have different requirements for GPS applications than individual vehicles. For instance, the dispatch manager’s ability to keep track of each vehicle’s location through the work day is just as important as the driver’s ability to find their way around with accurate real time mapping and directions.

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Oct 172012
 

In a former article I’ve talked about the commands cron and crontab  that are the standard way to schedule recurring things on a Gnu/Linux system.

But sometimes you need to do one thing at a specific date and time for just one time, and for these tasks the best option is to use at, another way to use at is to run a command later when the computer won’t be busy.

Or another reason could be that you want to run a command that requires a lot of time to end and you have to disconnect from that server, at could be used in this situation, but for these task i suggest to take a look at the articles on how to run commands on background and the utility screen

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