Install Bash by running the following commands:
root:bash-2.04# ./configure --enable-static-link \
> --prefix=/usr --disable-nls
root:bash-2.04# make
root:bash-2.04# make prefix=$LFS/usr install
root:bash-2.04# mv $LFS/usr/bin/bash \
> $LFS/usr/bin/bashbug $LFS/bin
root:bash-2.04# cd $LFS/bin
root:bin# ln -s bash sh
The Bash package contains the bash program
Bash is the Bourne-Again SHell, which is a widely used command interpreter on Unix systems. Bash is a program that reads from standard input, the keyboard. You type something and the program will evaluate what you have typed and do something with it, like running a program.