go to this link: http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash

then follow these steps listed below.

Pick Tar.gz for linux

step_1

Step 2.

Press Agree

step_2
Step 3.
Press okay

step2.1

Step 4.
Open file when download is complete.

step3
Step 5.
Extract file to desktop.

step_4

Step 6. Press extract

step_5

Step 7.
Open folder

step_6

Step. 8
Click run in terminal

step_8

Step 9.
Press enter
step_9

Step 10
Press Y then press Enter Button
step10

Step 11
Press N and you are Done

step_11