I have downloaded Android Studio for Linux and extracted it using GUI. Instructions for install are:

>Android Studio
INSTALLATION INSTRUCTIONS
  Linux Installation Instructions

  1. Unpack the Android Studio distribution archive that you downloaded to
     where you wish to install the program. We will refer to this destination
     location as your {installation home} below.

  2. Open a console and cd into "{installation home}/bin" and type:

       ./studio.sh

     to start the application. As a side effect, this will initialize various
     configuration files in the ~/.AndroidStudio1.5 directory.

  3. [OPTIONAL] Add "{installation home}/bin" to your PATH environment
     variable so that you may start Android Studio from any directory.

  4. [OPTIONAL] To adjust the value of the JVM heap size, create
      ~/.AndroidStudio1.5/studio.vmoptions (or studio64.vmoptions
      if using a 64-bit JDK), and set the -Xms and -Xms paramters. To see how
      to do this, you can reference the vmoptions file under
      "{installation home}/bin" as a model.

  [OPTIONAL] Changing the location of "config" and "system" directories
  ------------------------------------------------------------------------------
  By default, Android Studio stores all your settings under the ~/.AndroidStudio1.5/config
  directory and uses ~/.AndroidStudio1.5/system as a data cache.
  If you want to change these settings,

  1. Open a console and cd into ~/.AndroidStudio1.5/

  2. Create the file "idea.properties" and open it in an editor. Set the
     idea.system.path and/or idea.config.path variables as desired, for
     example:

     idea.system.path=~/custom/system
     idea.config.path=~/custom/config

  3. Note that we recommend to store data cache ("system" directory) on a disk
     with at least 1GB of free space.




Enjoy!

The first command:

    cd Downloads

puts my directory to

    thomasshera@thomasshera-Satellite-Radius-P55W-B:~/Downloads$

Then the second command " ./studio.sh" gives me:
>"bash: ./studio.sh: No such file or directory"
How fix this?