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This question already has an answer here:

I am following How to Install AMD ATI Radeon Graphics HD 6770M on Ubuntu 13.04 64bit

but at step no 5. i don't know how to do it 5 - Install Catalyst driver, type the following commands on terminal:

cd ~/Downloads 
chmod +x
sudo sh

this file in the downloads spot how can i use this command to install it

because i can't run it as execute as program

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marked as duplicate by chaskes, Eric Carvalho, Warren Hill, Florian Diesch, Kevin Bowen Nov 18 '13 at 2:58

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

I would advice sticking to the additional drivers tab in software sources, Ubuntu Software Center and files ending on .DEB. .RUN files might be a bit too much if you are not comfy with terminal commands ;) – Rinzwind Apr 27 '13 at 9:46
up vote 7 down vote accepted

Press the super key and search for terminal...

enter image description here

and activate it ...

Now type or copy/paste these lines one by one (so pressing enter after each line):

cd ~/Downloads 
chmod +x
sudo sh

the 1st 2 commands will show nothing when executed. The last one will ask for your admin password and then show a lot of lines. Watch out for errors :)

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Thanks bro your answer work BUT TO BAD :( LOW GRAPICH CARD ERROR SO I Removed it :( – Omar Semary Apr 27 '13 at 9:46
if that has not been solved on AU make a new question ;) Good luck Omar – Rinzwind Apr 27 '13 at 9:47

Where does your webbrowser store downloaded files? When using your webbrowser, did you download the run-file in your Downloads folder?

Or is the downloaded file elsewhere? Use the Files program to put the downloaded file in your Downloads folder.

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he already said it is in "the downloads spot". I took the liberty to assume he means ~/Downloads ;) – Rinzwind Apr 27 '13 at 9:44

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