What is MongoDB?

MongoDB (from “humongous”) is a scalable, high-performance, open source, schema-free, document-oriented database. Written in C++. MongoDB bridges the gap between key-value stores (which are fast and highly scalable) and traditional RDBMS systems (which provide structured schemas and powerful queries).

MongoDB is very interesting document-oriented database, because it has really awesome features:

• Document-oriented storage (the simplicity and power of JSON-like data schemas)
• Dynamic queries
• Full index support, extending to inner-objects and embedded arrays
• Query profiling
• Fast, in-place updates
• Efficient storage of binary data large objects (e.g. photos and videos)
• Replication and fail-over support
• Auto-sharding for cloud-level scalability
• MapReduce for complex aggregation
• Commercial Support, Training, and Consulting

This guide uses EPEL-repository and Chris Lea’s Yum Repository where you can find MongoDB RPM packages (i386 and x86_64) for CentOS and Red Hat (RHEL).

What is Gnome Do?

GNOME Do (Do) is an intelligent launcher tool that allows users to use the keyboard to rapidly perform tasks such as launching applications, manipulating files and data, running scripts, or sending e-mail. It is similar to the applications GNOME Launch Box (Linux Gnome), KRunner (Linux KDE), Quicksilver (Mac OS X), LaunchBar (Mac OS X) and Butler (Mac OS X).

What is Gnome Do – Docky?

Gnome Do – Docky is a nice frontend for GNOME Do (Do) which introduces an entirely new way to use Gnome Do. Docky is a graphical user interface feature that provides the user with a way of launching and switching between applications.
Gnome Do Docky Launchers

Gnome Do Docky Search

» Continue Reading "Howto Install, Configure and Use Gnome Do – Docky on Fedora 12 Linux"

Currently, the Fedora 12 updates repository does not have Firefox web browser, version 3.6. Firefox 3.6 stable and 3.6.1 unstable versions is, however, possible to install Fedora using Yum. Firefox 3.6 stable installation should works also with older Fedora Linux versions, like 11, 10, 9, 8.

Install Mozilla Firefox 3.6 Stable Version on Fedora Linux Using Remi Repository

» Continue Reading "Howto Install Mozilla Firefox 3.6 and 3.6.1 on Fedora Linux"

OpenOffice.org 3.2 is released and the new version has many new features. Example following:

• Faster Start Up Times - OpenOffice.org 3.2 Calc and Writer have both reduced 'cold start'
• ODF 1.2 Support - closer conformance to OASIS ODFF/OpenFormula specifications.
• Improved Proprietary File Support - Password protected Microsoft Office XML files, Filters for AportisDoc and PocketWord now support type detection based on DocType
• Support for Postscript based OpenType fonts

This is quick guide to install OpenOffice 3.2 with using OpenOffice.org original RPM packages. Currently, for example, Fedora's rawhide repository can be found in OpenOffice.org 3.2 packages, but they refused to install properly. So it is easier to use OpenOffice.org own RPM packages.

» Continue Reading "Howto Install OpenOffice.org 3.2 on Fedora 12, CentOS 5.4, Red Hat (RHEL) 5.4"

Sometimes it feels that many of the excellent and convenient command-line tools is forgotten, when they are replaced by graphical tools. A good example is the cal program, which is a command-line calendar to Linux and UNIX. It displays a simple calendar in text format.


Cal usage:

Displays current month calendar on console:

cal

Output:

    October 2009    
Su Mo Tu We Th Fr Sa
             1  2  3
 4  5  6  7  8  9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31

» Continue Reading "Calendar (cal) on Linux command line"