downloading from virtual terminal is not working

[adeel ahmad]

Hi
I'm first time using LINUX . I'm trying to download "git" using terminal, but the error comes like  "    E: Unable to locate package git   "My objective is to run QEMU. But i'm stuck in this situation.Also when i tried to run "software updater", its gives a fault like "  failed to download repository information ".But my browser works fine (that's how i'm mailing you).I do not how to face it.
RegardsAdeel  		 	   		  
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