bp77_linux.tar.gz and store it in your home directory.
bp77_linux.tar.gz and extract the files by typing
gunzip bp77_linux.tar.gz | tar xfv -
.cshrc or .bshrc in your home directory:
set path = ($path $HOME/BProlog)
such that you can start B-Prolog from any working directory.
bp in the BProlog directory and the path accordingly.