Hi Rahul,
Heres how:
Unix users must install the latest Download Manager in order to download the files to the Unix platform correctly. The files must be unpacked using the root user. Unrar is required for these other platforms (Linux, Solaris, AIX, Tru64, HP-UX).
The command:
unrar x <archiv-name(exe-file)>
triggers the unpacking process.
The data is unpacked to the current directory.
The command
unrar -h
displays further options.
According to SAP Note http://service.sap.com/sap/support/notes/886535
Regards,
Onkar