Archive for the ‘Linux’ Tag

Install Wireless USB Adapter TL-WN721N driver on Ubuntu 10.4

Hello Folks,

This last weekend and I have to play a little bit with Ubuntu 10.4 and my new wireless USB adapter TP-LINK model TL-WN721N. The Ubuntu 10.4 has not recognized the adapter, so I had to ask Google how to make that works. I’ve tried many things, one was using diswrapper with Windows Driver, but did not work. After another attempts I found a solution, and I decide to write here.

The first step is to get the firmware, you can download it from the following link:
http://git.kernel.org/?p=linux/kernel/git/dwmw2/linux-firmware.git;a=blob_plain;f=ar9271.fw;hb=35b308409dc18991ec833c24972fd631c9f479a1

After the download you need to copy it to /dev/firmware directory:

sudo cp -r ~/Downloads/ar9271.fw /lib/firmware

Now we need to get the latest version of compact wireless, you can get it from the link below:

http://wireless.kernel.org/download/compat-wireless-2.6/

I got the file compat-wireless-2.6.tar.bz2

After the download you will need to uncompress the file:

tar -xjvf compat-wireless-2.6.tar.bz2

Now, it’s time to compile the driver. Enter in directory:

cd compat-wireless-2010-05-23/

and type the command:

sudo make

After the compilation, you can install the driver using the command:

sudo make install

Now, you need to unload the old driver and load the new one:

sudo make unload
sudo make load ath9k_htc

After loading the new driver you must reboot you system and once the system rebooted you will be able to use your wireless connection.

I hope this tip will be useful for you.

See you!!

Leo

Reference: http://www.theinquirer.net/inquirer/news/1603562/canonical-releases-ubuntu-linux-04-lts


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Installing JRuby on Ubuntu

Today we will see how to install JRuby on Ubuntu

First of all you need to download the JRuby. Download the latest JRuby accessing the link:

http://dist.codehaus.org/jruby/

I am using the version 1.3.1 (jruby-bin-1.3.1.tar.gz)

Open a terminal and go to the directory where you have downloaded file and unpack the jruby file using the following command:

$ tar zxvf jruby-bin-1.3.1.tar.gz

We need to set some environment variables. I will add the following line at end of file .bashrc in your home directory.

export JRUBY_HOME=/home/leonardo/jruby-1.3.1
export PATH=$JRUBY_HOME/bin:$PATH

Now, Let’s check whether JRuby is installed properly, type the command:

$ jruby -v

You should see something like this:

jruby 1.3.1 (ruby 1.8.6p287) (2009-06-15 2fd6c3d) (Java HotSpot(TM) Client VM 1.6.0_13) [i386-java]

Alright! If you are able to see the JRuby version, your system is configured properly.

Now you can start installing some gems:

$ jruby -S gem install jruby-openssl

jruby-openssl is necessary due JRuby doesn’t support the default Ruby’s openssl.

The parameter -S tells JRuby to use the scripts which are in JRuby’s bin directory, then in a second case to use the which ones in the system PATH.

If you want to install Rails:

$ jruby -S gem install rails

That’s all about!