... want to copy those packages on to a computer ...
Open the terminal window and ...
1) cd /etc/
2) su , password
3) gedit yum.conf
... and edit line 3 from : keepcache=0
to : keepcache=1
Save the file and all packages downloaded using
a) yum install <package> or b) using the package
manager, will be saved in :
/var/cache/yum/updates/packages ... or
... and can be copied to anywhere.