install rar in linux server
if you want to enable rar in your linux server, then refer to below
Download this package:
http://download.gna.org/unrar/unrar-0.0.1.tar.gz
Go to the direcotry where you downloaded it and type these commands (as root):
tar -xvzf unrar-0.0.1.tar.gz
cd unrar-0.0.1
./configure
make
make install
After these steps logout from root and try again to extract your rar file.
references
http://www.unixresources.net/linux/lf/15/archive/00/00/18/06/180675.html