重新进入到/usr/local/hadoop履行
./bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-*.jar grep ./input ./output "dfs[a-z.]+"./bin/hadoop jar .重新进入到/usr/local/hadoop履行
./bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-*.jar grep ./input ./output "dfs[a-z.]+"./bin/hadoop jar .