hadoop/hadoop-mapreduce-project/bin/start-mapred.sh

#!/usr/bin/env bash

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# Start hadoop map reduce daemons.  Run this on master node.

bin=`dirname "${BASH_SOURCE-$0}"`
bin=`cd "$bin"; pwd`

if [ -e $bin/../libexec/mapred-config.sh ]; then
  . $bin/../libexec/mapred-config.sh
else
  . "$bin/mapred-config.sh"
fi


# start mapred daemons
# start jobtracker first to minimize connection errors at startup
"$HADOOP_PREFIX"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/mapred start jobtracker
"$HADOOP_PREFIX"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/mapred start tasktracker