How to install flash player on Opera in Ubuntu?

Easiest way to install flash player on Opera in Ubuntu.

Are you frustrating with your Opera because you cannot play Youtube videos because it ask you to install Flash player, but you can't find/install for Opera?

Here is the simple steps. It's for newbies (as I am).  NOTE: This procedure works only if Flash player is installed for Firefox. 

Step-1: Change to the hidden directory

$cd ~/.opera

Step-2: Open and edit pluginpath.ini file. Add this line at the end of the file and save the file. (Note: CLOSE OPERA WHILE EDITING pluginpath.ini FILE.)

/home/qwerty/.mozilla/plugins=1

Step-3: Open Opera. Now, it works fine.

Problem with NS-2

Problem: Makefile:314 *** commands commence before first target. Stop.
Solution: DO NOT use tab or copy/paste spaces from previous line when you add .o in makefile. Use only space.