Update README.md

README.md

@@ -1,12 +1,113 @@
 # lfs-scripts
 Instructions and scripts to build LFS (Linux From Scratch) 10.0 as simply as possible
 
-# Overall instructions
+# Foreword
 
 First, this guide does not replace reading the whole LFS book. I highly recommend that you read it, at least once, and then go to the automation scripts provided here.
 
 This build will be done inside a virtual machine, for that I'll be using Oracle VirtualBox, but you can use the tool you prefer. I'm running an Arch Linux VM, feel free to use your GNU/Linux distro of preference. Just be sure to install the development tools (base-devel package on Arch).
 
-My VM has two virtual hard disks: one for the host (Arch Linux itself) and another for building LFS. You could also use a single hard disk with two partitions, that's up to personal preference. I've decided to use two separate hard disks so I can completely isolate myself from the host after the build. At the end, you'll be able to create a separate VM and boot it.
+My VM has two virtual hard disks: one for the host (Arch Linux itself) and another for building LFS. You could also use a single hard disk with two partitions, that's up to personal preference. I've decided to use two separate hard disks so I can completely isolate LFS from the host after the build. At the end, you'll be able to create a separate VM and boot it.
 
-The packages needed to build LFS were obtained in ftp://ftp.lfs-matrix.net/pub/lfs/lfs-packages/lfs-packages-10.0.tar (423 MB), other mirrors are available at http://linuxfromscratch.org/lfs/download.html
+The packages needed to build LFS were obtained from ftp://ftp.lfs-matrix.net/pub/lfs/lfs-packages/lfs-packages-10.0.tar (423 MB), other mirrors are available at http://linuxfromscratch.org/lfs/download.html
+
+# Build instructions
+
+Create a partition and a filesystem in the virtual hard disk (/dev/sdb). Run commands as root:
+
+```
+mkdir /mnt/lfs
+fdisk /dev/sdb
+```
+
+Use the following basic options:
+
+n- new partition
+<Enter> for all default values
+w- write changes
+
+Create a filysystem, a mount point, and mount it:
+
+```
+mkfs.ext4 /dev/sdb1
+mkdir /mnt/lfs
+mount /dev/sdb1 /mnt/lfs
+```
+
+Include the following command to root's .bashrc:
+
+```
+export LFS=/mnt/lfs
+```
+
+Source the file to use the variable:
+
+```
+source .bashrc
+```
+
+Download all the packages and extract them to /mnt/lfs/sources. Set the sticky bit:
+
+```
+chmod -v a+wt $LFS/sources
+```
+
+Create the basic filesystem:
+
+```
+mkdir -pv $LFS/{bin,etc,lib,sbin,usr,var,lib64,tools}
+```
+
+Create the lfs user, used during the initial build process:
+
+```
+groupadd lfs
+useradd -s /bin/bash -g lfs -m -k /dev/null lfs
+passwd lfs
+```
+
+You will have to type a password.
+
+Make lfs the owner of the filesystem:
+
+```
+chown -v lfs $LFS/{usr,lib,var,etc,bin,sbin,lib64,tools,sources}
+```
+
+Login as the lfs user:
+
+```
+su - lfs
+```
+
+Create a .bash_profile file:
+
+```
+cat > ~/.bash_profile << "EOF"
+exec env -i HOME=$HOME TERM=$TERM PS1='\u:\w\$ ' /bin/bash
+EOF
+```
+
+Create a .bashrc file:
+
+```
+cat > ~/.bashrc << "EOF"
+set +h
+umask 022
+LFS=/mnt/lfs
+LC_ALL=POSIX
+LFS_TGT=$(uname -m)-lfs-linux-gnu
+PATH=/usr/bin
+if [ ! -L /bin ]; then PATH=/bin:$PATH; fi
+PATH=$LFS/tools/bin:$PATH
+export LFS LC_ALL LFS_TGT PATH
+EOF
+
+source ~/.bash_profile
+```
+
+Now, run the lfs-cross.sh script, which will build the cross-toolchain and cross compiling temporary tools from chapters 5 and 6. The build took 30 min on my machine:
+
+```
+sh lfs-cross.sh
+```