You need tcl 8.5 or newer in order to run the Redis test

1 wget http://downloads.sourceforge.net/tcl/tcl8.6.1-src.tar.gz  
2 sudo tar xzvf tcl8.6.1-src.tar.gz  -C /usr/local/  
3 cd  /usr/local/tcl8.6.1/unix/  
4 sudo ./configure  
5 sudo make  
6 sudo make install