Dec 022010
 

qemuI’ve received this article from Francesco and gladly i publish it:

Every day we read of new Linux distributions (GNU/Linux to be correct), and sometimes happen to want to try them “on the road”, even those who do not have a live version. The first program that comes to mind, I think, is precisely Qemu. But I also think that there is also an attempt  to find a more friendly alternative. The second choice I think is VirtualBox, a Qemu-based solution that gives to you at once and without effort everything you need. But is it really necessary to use a program that adds to our Linux machine other useless processes ? For me no. Of course, to switch from Virtualbox to Qemu I think, all of these tasks should be accomplished by a graphical interface “mouse-proof” and the terminal should not be used.

You don’t believe that it’s possible ?

Programs you need:

  • qemu, the main program on the command line;
  • qemu-launcher, graphic interface of qemu;
  • qemu-control, add-on of qemu-launcher.

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Nov 302010
 

opensource
Article By: Roberto Sedycias

As we started the project of our web site, we knew that the proprietary software costs would be too high for our financial resources. Our only option then was to make use of Open Source Code softwares.

However, within the Open Source Code there are lots of softwares to choose from, and it´s up to the system analyst/programmer to pick the ones that best suit the project goals.

In our case, we picked Linux as our operating system. However we faced a big question: Which Linux distribution ? There are dozens of linux distributions, each one with specific advantages, sometimes with or without paid services.

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Nov 222010
 

terminalHave you ever having to control more than a single file with your tail -f ?
I will and I just recently found out that you can run the tail command specifying the -f flag several times so you can give the command:

tail -f /varlog/messages -f /var/log/syslog

You’ll get an output like this:

==> messages <== Nov 22 00:43:07 laptop kernel: [ 61.487969] ADDRCONF(NETDEV_UP): eth0: link is not ready

==> syslog <== Nov 22 00:43:31 laptop pulseaudio[1773]: ratelimit.c: 1 events suppressed

==> messages <== Nov 22 00:43:31 laptop pulseaudio[1773]: ratelimit.c: 1 events suppressed

==> syslog <==
Nov 22 00:45:44 laptop ntpd[1118]: kernel time sync status change 6001

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Nov 182010
 

arduino

Adding Ethernet, WiFi and Other Communications to Your Arduino (Or Other PIC) – Including the NSLU2

Author: John Smitty

The Arduino is a small programmable device that can hold a small program and perform tasks such as reading temperature sensors, turning on or off switches, and can even serve as the ‘brain’ for a robot. I have used the Arduino (actually freeduino) for projects related to HVAC and hydroponics automation.

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