Ed is an optional package. The only program on a normal LFS system that uses ed is patch. But these days, ed patch files are quite rare in favour of the diff format patch files. So, if you personally have no need to use ed, you can skip it. Install Ed by running the following commands: cp buf.c buf.c.backup && sed 's/int u/int u, sfd/' buf.c.backup | \    sed '/.*\*mktemp.*/d' | \    sed 's/.*if (mktemp.*/ sfd = mkstemp(sfn);\    if ((sfd == -1) || (sfp = fopen (sfn, "w+")) == NULL)/' > buf.c && ./configure --prefix=/usr && make && make install && mv /usr/bin/ed /usr/bin/red /bin