--enable-static-link: This configure option causes bash to be linked statically. --prefix=$LFS/static: This configure option installs all of Bash's files under the $LFS/static directory, which becomes the /static directory when chroot'ed or reboot'ed into LFS. --with-curses: This causes bash to be linked against the curses library instead of the default termcap library which is becoming obsolete. It is not strictly necessary for the static bash to be linked against libncurses (it can link against a static termcap for the time being just fine because we will reinstall Bash in Chapter 6 anyways, where we will use libncurses), but it's a good test to make sure that the Ncurses package has been installed properly. If not, you will get in trouble later on in this chapter when you install the Texinfo package. That package requires ncurses, and termcap can't reliably be used there. The &&'s at the end of every line cause the next command to be executed only if the previous command exits with a return value of 0 indicating success. In case all of these commands are copy & pasted on the shell, it is important to ensure that if ./configure fails, make isn't executed and, likewise, if make fails, that make install isn't executed, and so forth.