31 August 2006

Powerful alternative to Ruby On Rails

Ruby On Rails is an open-source web framework coded in Ruby. It strives for simplicity and allowing real-world applications to be developed in less code than other frameworks and with a minimum of configuration. But it has a powerful alternative called Nitro. You can find some tutorials about Nitro on Oxyliquit It seems, that Nitro can do much more as RoR.

03 August 2006

Micro TCP/IP Stack

The µTCP/IP can be used in 8 bit microcontrollers. Such microcontrollers can today be found in toasters and microwave ovens.

06 July 2006

Solaris 10 - a bothersome bug in UFS

Let see:

$ df -h

/dev/md/pgsqlindg/dsk/d350 35G 16384E 37G 50129137443513% /global/pgsqlin


This UFS bug is bothering me, because I'm using Nagios to monitor also disk space and Nagios notify me a critical state. So I've to disable disk space checking and wait for kernel jumbo patch for this problem.

Bash scritping: more hints for working with numbers

As an addendum to my first post about bash scripting and numbers here are some more nice information.

* Check if $VAR is a positive integer:

if echo "$VAR" | egrep --null "^[[:digit:]]+$" > /dev/null ; then
echo Integer: $VAR
else
echo $VAR isn't an integer.
fi


* Check if $VAR is a positive real number:

if echo "$VAR" | egrep --null "^[[:digit:]]+(\.[[:digit:]]+)*$" > /dev/null ; then
echo Real number: $VAR
else
echo $VAR isn't a real number.
fi


Enjoy!

03 July 2006

Green Deck-House - a historic building in Poznań

See at this: zielona budka Looks like quite normal green deck-house? But it is a historic building from 1913 and it is the last one of this kind. It was once a tramway station in my home city.

29 June 2006

Ethereal® is now Wireshark

Ethereal® is since 07.06.2006 Wireshark. It's a great network analysis tool.

28 June 2006

Sun announces PostgreSQL for Solaris Integration

PostgreSQL: News: Sun announces PostgreSQL for Solaris Integration, Support

This is great. Beside this the company where I'm working is using PostgreSQL on Solaris 10 since some time already.

27 June 2006

Bash scripting: checking if a variable is a number

Sometime ago I had a simple problem with bash scripting. I liked to check if a variable is a number or not. First I'd looked up into Advanced Bash Scripting Guide but didn't found anything. So my first approach was:

[ -z "`echo $VARIABLE | tr -d "[:digit:]"`" ]

But I didn't like it because of tr usage. So after some discussion with other people I came to the following solution:

[ $VARIABLE -eq $VARIABLE ]

It works great and could be used in a bash script like this:

if [ $VARIABLE -eq $VARIABLE 2> /dev/null ]; then
echo $VARIABLE is a number
else
echo $VARIABLE isn't a number
fi

13 June 2006

Nagios 2.4

Just downloaded version 2.4 sources. Trying to config it but something is still wrong. Last time I've done compilation and configuartion of Nagios was during version 2.0 and I hadn't so many problems as now. First it seems that the init script have to be rewritten. stop method doesn't work at all.

08 June 2006

SEC - simple event corellator

Just startet testing SEC - simple event corellator which seems to be a powerfull log monitoring perl script.

07 June 2006

Free Wiki Hosting

I've just started looking around for a nice free wiki hosting and after some time spent with searching over the web, I've noticed that the following Wiki hosting offerings looks quite good to evaluate them:

Cyborg Name Generator

There is a Cyborg Name Generator on the net. Nice.

06 June 2006

Something about me

Okay, now something about me. I'm currently living in Vienna, Austria but I'm coming from Poznań, Poland. Below a picture of Poznań Old Town. I love my homecity so much and I'm missing it.

02 June 2006

CLCL

CLCL is a really nice clipboard utility.

30 May 2006

Linux Live - build your own Linux LiveCD

Linux Live is a set of shell scripts which allows you to create own LiveCD from every Linux distribution. Just install your favourite distro, remove all unnecessary files (for example man pages and all other files which are not important for you) and then download and run these scripts to build your custom Live Linux.

26 May 2006

Portrait Illustration Maker

Portrait Illustration Maker - funny web application.

SQLite

SQLite is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine.

Technorati:

Nagios

Nagios is an open source host, service and network monitoring program. I'm using it inside the company I'm working. But I've some problems with it and nobody can explain them....

stock.xchng

stock.xchng is a really nice photo site.

Technorati:

24 May 2006

Second blogging tool

Okay, Bleezer was nice but kind of unstable. Now using w.bloggar. seems to be useful.

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