I am trainee at ISRO,ahmedabad,INDIA .I am getting problems in installing cent os . I have tried all solutions that are available On google. One limitation is that no internet connection is available in ISRO for security. So offline I have tried through bootable pendrive and DVD also. I have tried LIVECD and LIVEDVD so its working,but as we all know LIVECD and LIVEDVD does not contain all packages as full version…!!! Can anyone suggest me to get out from this problem?