This is a page dedicated to step by step instructions on installing, using, and configuring the Wub web server.
Wub depends on features only available in Tcl 8.6. One option is to install ActiveTcl 8.6 on your platform.
The urls may change, but the game remains the same:
wget http://downloads.activestate.com/ActiveTcl/Linux/8.6.0/ActiveTcl8.6.0.0b2.291226-linux-ix86-threaded.tar.gz
tar -zxvf ActiveTcl8.6.0.0b2.291226-linux-ix86-threaded.tar.gz
cd ActiveTcl8.6.0.0b2.291226-linux-ix86-threaded
./install.sh
cd /opt/ActiveTcl-8.6/bin
./teacup update-self
./teacup update