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4 open source software to analyse big quantity of log files

Dec 022012

Logging is a critical thing for all system administrators, if you log too much and you don’t manage the files you could fill up a partition or even worst stop some service, if you don’t log enough you’ll lose information when something goes wrong, in general a good solution for this is to send all the logs to a central server that will store for the time you need them, and keep just 1,2 days of log into the local machine.

You could do this configuration easily with rsyslog or syslog-ng to send/receive the logs and logrotate to rotate the files locally on your machines, today I want to show you some open source programs that can receive the logs, store them on filesystem or database and analyse them presenting the results via Web dashboards.

These are large applications most suited for big company, or in general to everyone that want to keep and manage a lot of data they are: Apache Flume, Logstash, Greylog2 and Scribe

Raspberry Pi what is the secret of his success and what are its potential

Articles, Opinion 5 Responses »

Nov 292012

If in these days you take a look at the list of possible gifts/gadgets that will be hot in the next Christmas you’ll find almost for sure the Raspberry Pi.

This is a credit-card sized computer that plugs into your TV and a keyboard. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also able to play high-definition video and sending the output through an HDMI interface to a TV or a monitor and all of this at a starting price of around 25$.

The design is based around a Broadcom BCM2835 SoC, which includes an ARM1176JZF-S 700 MHz processor, VideoCore IV GPU, and 128 or 256 Megabytes of RAM, with two USB ports and a 10/100 Ethernet controller. The design does not include a built-in hard disk or solid-state drive, instead relying on an SD card for booting and long-term storage. The board is intended to run Linux kernel based operating systems and there is a lot of interest on the open source community with many small distro born to support this new hardware such as raspbian, a free operating system based on Debian optimized for the Raspberry Pi hardware.

Recently the Raspberry Pi Model B with 512MB RAM has been announced and put on the market.
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Is Linux better than Windows 8 for gaming?

Articles, News, Opinion 18 Responses »

Nov 282012

Article by Jason Phillips

If you’re a real gamer you know just how terrifying Windows 8 can be. With the changes they’ve made there just might not be any sort of viable way for real gamers to get the kind of experience they want.

Expect seriously inconvenient DRM implementations and major difficulties for independent developers because of the proprietary (and profitable) app store built in to Windows 8. Independent developers are going to have no choice but to make the transition, meaning quality free games will disappear, too.

The Big Boys Will Still Be There, Though… Right?

You can expect the Steam client to be present on Windows 8 for a long time to come. There will also be many games and franchises created by your favorite publishers. But with many of the issues we’ve seen even the biggest publishers face with app stores, they might not be willing to work as hard as Microsoft wants them to.

Coloring Grep to easier research

Guides, Pills 6 Responses »

Nov 252012

In the past I’ve posted an article regarding the basic usage of grep, one of the commands that I use daily at work to search a text within multiple files, or a text string in the list of running process of a Linux server, but I’ve forgot to show you a small and useful option : How to colour the output that you get from grep to highlight the text you were searching for in a long line.

This is a small option of this powerful command but can save your eyes when searching for a particular property of a Java process that is 4 or 5 lines long.

To be honest I’ve realised this thanks to an article of Alessio, posted recently on his nice blog: http://dark-linux.net and so the following is the translation by me of his article in Italian with some small addition in examples and explanations.

Add security to your ssh daemon with PAM module

Guides, Pills No Responses »

Nov 232012

In the past I’ve published some info to enhance the security of your ssh server such as 3 easy steps to strengthen your ssh server or how to use SSH for more secure browsing in public networks, today we’ll take a look at the PAM modules of GNU/Linux and in particular the module ssh and at some options that we can activate to strengthen our ssh server.

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