[CentOS] how to do repetetive command in shell

Dear all,

i'm writing a certain script which does a specific task in a repetitive manner, i'm going to give a similar script with the same concept hope you could advise me to a better way:


USER1="roland"
USER2="dany"
USER3="kevin"


cp -r /opt/$USER1/test /backup/$USER1
cp -r /opt/$USER2/test /backup/$USER2


such a command would be repeated 832 times (this is just an example) 
so instead of copying the above line 832 times and appending that user's number in each "$USER"

is there a way to do it in a  smarter way ?


thanks,

--Rolad

 		 	   		  
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