a)I want to change the permissions of file:-part-m-00001 to 777.The owner for this file is naresh. The first two commands with sudo is showing command not found whereas hadoop fs -chmod 777 /vamsi/part-m-00003 command changes permissions to rw-rw-rw-but i want it to change to 777(rwxrwxrwx) naresh@ubuntu:~/Work1/hadoop-1.2.1/bin$ sudo -u root hadoop fs -chmod 777 /vamsi/part-m-00001 sudo: hadoop: command not found naresh@ubuntu:~/Work1/hadoop-1.2.1/bin$ sudo -u naresh hadoop fs -chmod 777 /vamsi/part-m-00001 sudo: hadoop: command not found naresh@ubuntu:~/Work1/hadoop-1.2.1/bin$ hadoop fs -chmod 777 /vamsi/part-m-00003 Warning: $HADOOP_HOME is deprecated. ... View more

a)I am trying to understand below query in link: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LateralView SELECT pageid, adid FROM pageAds LATERAL VIEW explode(adid_list) adTable AS adid; I know about explode but i did not understand the output of above query.Could anybody elaborate LATERAL view on this. In manual:- A lateral view first applies the UDTF to each row of base table and then joins resulting output rows to the input rows to form a virtual table having the supplied table alias. A lateral view first applies the UDTF to each row of base table means it will return 1 2 3 3 4 5 and then joins resulting output rows to the input rows to form a virtual table having the supplied table alias.? --Not clear ... View more