hadoop源码阅读-shell启动流程-start-all

when executes start-all.sh (or start-dfs.sh,start-mapred.sh) ,some config files listed below will be loaded:

   libexec/hadoop-config.sh ( use  bin/hadoop-config.sh  if without previor)

   config/hadoop-env.sh

and if start NN or JT,it will invoke

  hadoop-daemon.sh

and when starts DN or TT,it will invoke

  hadoop-daemons.sh

to run the cluster by ssh respectively