How to install Flex 4 SDK on your linux OS?

Hi, first of all, why to install Flex 4 sdk ?
Because you can  write code in ActionScript3.0 and compile into SWF file using any edit program and any Operating System.
Also you are not bound to buy a license for flex 4 or Flash Profesional CS 3,4,5, a license which cost a lot for any middle person.

I am using at this moment Ubuntu Linux v.10.10.

1. Download Flex 4 SDK  from this link   (Download -> Free Adobe Flex SDK) or directly from here . Save it to Desktop.

2. Unzip and change the name to "flex"

3. Open a terminal (to use the command line) and write the following code to create a folder  called "flex4" at address "/opt/"
  sudo mkdir /opt/flex4

4. Now, you need to move SDK program from Desktop to that address . Here is the code :
sudo mv flex/* /opt/flex4/ 
This command move all files from flex to flex4 folder. If you want to check you moved everything , you can write in terminal :
 cd /opt/flex4
 ls
5. Now, your machine needs to know what to do when you type in terminal a code like  mxmlc file_name.as This command line compile the code wrote in file  "file_name" in a SWF file.
To know, you need to add the following code in a specific file called ".bashrc" :
gedit ~/.bashrc


and add(copy -paste)  to the last line  export PATH=/opt/flex4/bin:$PATH


Have fun , programming is fun!