Download the rar linux x64 at:
http://linux.newhua.com/soft/1739.htm
cd Download/
su
passwd: ****
tar -zxvf rar-linux-3.8.0.tar.gz --directory=/opt/
cd /opt/rar
ln -s /opt/rar/rar /usr/bin/rar
ln -s
/opt/rar/unrar /usr/bin/unrar
Done~