create lxl1 lxl2 lxl3
root login lxl1 lxl2 lxl3 reset password
set proxy update upgrade
install java on each node map_hosts.sh
create hadoop on each node prepare.sh
login as hadoop proxy_setting.sh source update upgrade
install.sh source
set_had_env.sh
configure.sh
namenode masters slaves
hadoop namenode -format